The construction of a house or building begins with calculations and drawing up an estimate, taking into account the materials used, the work performed and the cost of renting special equipment. That is why in construction it is customary to use estimates that clearly reflect the financial costs of constructing a specific object. The estimate applies to all types of buildings. In this article we will tell you what a house estimate is and how it can be calculated, as well as how much it costs to calculate an estimate.
Composition of the construction estimate
An estimate for the construction of a house is the main document for specialists; without it, not a single developer will carry out the construction of a building. The main financial costs fall on the purchase of building materials and additional elements for them. When calculating estimates, you should take into account such parameters as:
- volume of planned work;
- technology used;
- construction time;
- number of specialists on the project;
- volume and terms of financing of the facility.
These criteria will allow the customer to control the timing of the construction process, check individual species works The main task that the estimate for building a house solves is:
- adherence to a clear work schedule;
- amount of financing during the period of work.
To perform calculations, the customer can submit applications to several companies at once; to do this, it is necessary to conclude an agreement for the preparation of the document. As a result, a house estimate compiled by different specialists will differ in the final cost, this is due to the fact that each company contributes its suppliers of materials and specialists performing the work. After reviewing several documents, you can compare and choose for yourself the most optimal option in terms of money and without compromising the future design.
Be sure to include minor or unexpected expenses at 15% of the total cost of the property. This may include transportation costs, payment for obtaining various certificates related to construction.
Acquisition of land and performing calculations
Construction costs, as a rule, begin with the inclusion of the cost of the land plot in the expenditure part of the document. Land is acquired in several ways that do not contradict the law:
- purchase of a plot from the previous owner;
- redemption from state property;
- obtain a plot of land free of charge, subject to the availability of free land.
When purchasing a plot of land, be sure to draw up an agreement; this document will help you avoid fraudulent transactions and protect you legally. The contract must contain:
- subject of the agreement: purpose of the site, its category and total area;
- the price of the plot agreed upon by the sellers and the buyer.
- When the transaction has already been completed, state registration of the transfer of ownership rights is carried out. For this, the following documents are submitted to the justice system:
- application-registration;
- receipt of payment for registration of the site;
- purchase and sale agreement;
- passport and additional identity documents;
- cadastral plan.
The entire package of documents is accepted by the relevant authority and the decision is made within the period established by law, which is one month.
For information! When several construction processes are carried out by different contractors, it is necessary to prepare estimates for construction work for each type of work.
The price of such a document can vary from 9 to 40 dollars, because... The calculation depends on the number of positions in the document. The period for drawing up documentation is from 1 day, depending on the urgency.
How to make an estimate
Calculating future construction costs is a matter for specialists, but if you are confident in your abilities, you can draw up an estimate for construction yourself. The photo shows an example of a construction estimate frame house. Procedure for drawing up the document:
- decide on the amount of materials;
- find the necessary equipment;
- negotiate with construction specialists.
When you already have an idea of what the house will be built from, what it will look like, in which part of the site it will be located, what materials will be used, it will not be difficult to calculate the final amount. It is worth noting that on the Internet now large number construction forums, where you can download a blank estimate document form or compose it yourself in an office program.
So, how to make an estimate for building a house made of wood? To prepare a cost estimate you must:
- Decide on the sequence of actions, understand what work should be entrusted to construction organizations, and what you can do yourself.
- The following is the calculation of the estimate, depending on the use of construction technologies. It consists of determining the volume of building materials and structures and their application.
- When all this data is already available, you can find a company providing construction services, look at the prices, and find out the cost of materials and work.
- Next, the component takes all the obtained values and transfers them to its table, where the total amounts will be summed up for each type of work or product.
- When all the data is filled in in the columns: name, cost of work, unit of measurement, you can perform a general summation of the project. For convenience, you can put the final figure on the right side of the table; for this you need to configure the formula. This calculation can be performed for a structure made of any material and design.
In a similar way, they calculate the amount of materials and the amount of work for all types of houses, regardless of what they are built from.
Cost calculation for foundation, roofing and finishing materials
The estimate for construction work must necessarily contain information about the foundation, roofing and finishing materials, these positions are the most expensive. In order to understand how to calculate the volume of material for the foundation of a house, you should multiply the perimeter, height and thickness of the foundation. As a result, we will get the volume and find out the cost of 1 cubic meter. m of concrete and multiply it by the resulting value. It is very easy to calculate the roofing material; for this you need to take the total roof area and the cost per 1 sq.m. from the project for the house. material, and then multiply them together. Calculating the cost of finishing is the most troublesome task; for this you will need to multiply the wall area by the cost of 1 sq.m. each type of product.
We invite you to watch a video that shows how to calculate estimates
The choice of foam blocks for building a house indicates reasonable savings for the developer. To assess the benefits of such a solution, you should first calculate the turnkey estimate. This will help plan future expenses and find out whether there is enough savings for construction in the family budget. In addition, a detailed listing of materials gives an objective picture of the upcoming construction and suggests ways to save money without damaging the house.
Estimates are drawn up based on the house design. As an example for independent calculation of materials, consider a small building made of foam blocks on a strip foundation, consisting of three rooms, a kitchen and a terrace.
Estimate for the foundation
Since foam concrete is a lightweight material, when building a bathhouse, summer kitchen or small dacha can be used screw piles. According to experts, for building a house of 1-2 floors, a strip foundation is more suitable. It can be monolithic or prefabricated, recessed or shallow. Such a foundation for a house looks quite labor-intensive and expensive, but it has a big advantage. A strip foundation makes it possible to lay a basement or cellar under a residential building made of foam block.
A monolithic base, which is difficult to manufacture and reliable in operation, is well suited for the sample. The estimate for construction work will contain all the costs of its installation.
1. For an area with non-heaving soil, select shallow foundation 0.6 m deep. The trench needs to be dug 20 cm deeper to make a sand cushion.
For blocks measuring 600×300×200 mm, we set the width of the base to 0.5 m. The foundation for the house will be poured from the outside into the formwork, so its final height is 0.6+0.4=1.0 m.
2. Determine the length of the tape:
- (8×2)+(6×2) = 36 m, external walls;
- 8+6=14 m, internal partitions;
- 4+(1.3×2) = 6.6 m, terrace.
The total length is 48.6 running meters.
3. Calculate the volume of concrete required for pouring monolithic foundation: 48.6 (tape length) × 1.0 (base height) × 0.5 (base width) = 24.3 m 3.
4. In the construction estimate, we list the components necessary for mixing it yourself (if desired, you can order a ready-made, factory-made solution). Their quantity is determined based on the concrete grade M300. For 1 m 3 of mixture you will need:
- 385 kg of cement M400;
- 1080 kg gravel/crushed stone;
- 705 kg of coarse sand;
- 200-220 liters of water.
To find out how much of each material is required, we multiply the standard filling parameters by the filling volume:
- 385×24.3= 9.367 t cement;
- 1080×24.3= 26.244 tons of crushed stone;
- 705×247.3= 17.132 t sand;
- 540 l water (depending on the moisture content of the components).
5. We calculate the amount of sand for filling under the foundation of a house made of foam blocks:
48.6 (tape length) × 0.5 (width) × 0.2 (pillow thickness) = 4.86 m 3. We round the result to 5 and in total we get 17.132 + 5 = 22.132 tons of sand.
6. When building a monolithic foundation, reinforcement is always required. For our sample, we select a frame from two longitudinal rows, 2 rods each with a diameter of 12 mm. For transverse rows, reinforcement with a cross section of 10 mm will be required. With a jumper pitch of 0.5 m, the cross section of the frame is 30 × 0.65 m, the length of the rods is 0.35 m (horizontal) and 0.7 m (vertical). In total, for one structure (ring) you will need 0.35 × 2 + 0.7 × 2 = 2.1 m. In addition, for the joints on the jumpers you need to provide tires 3 × 4 = 12 pcs. 1 m each. Total 12 meters or 2 rods 6 m each.
7. We determine the total amount of reinforcement for the estimate for the construction of a house made of foam concrete: 48.6 × 4 + 12 = 206.4 m or 35 rods of 6 m each with a diameter of 12 mm.
8. Calculate the number of rings for jumpers: 48.6/0.5+1=98 sets or 35 rods of 6 m each.
9. To knit the reinforcement, use soft steel wire at the rate of 0.5 m for each connection. For jumpers you will need 98 × 4 = 392 pcs, for tires 12 × 4 = 48 pcs, a total of 440 ties × 0.5 m = 220 meters.
Estimate for foam concrete blocks for building a box
In the 6x8 house project, we plan to lay load-bearing walls in half a block. For internal partitions, a quarter of a stone is enough.
- 0.06 m – area of the spoon or side of the foam block (200×300=60000 mm);
- 0.18 m – area of the bed or base of the block (300×600=180000 mm).
1. In a house made of foam blocks, choose a wall height of 2.8 m. It will require 14 elements in half a block. Taking into account the seam joints (14 pieces, 0.5 cm each), we get 2.87 m. In fact, the height of the walls inside the room will be 2.6-2.7 m (reduced due to the ceiling and screed).
(8+7.3+8+6+4+1.3)×2.8 m=96.88 m2 – area of load-bearing walls.
For construction you will need: 96.88/0.06 (S spoon) = 1615 pieces of half-stone foam blocks.
2. Determine the area of the internal partitions: (8+3+3)×2.8m=39.2 m2. For their construction, foam blocks of a quarter of an element are required: 39.2/0.18 (S bed) = 218 pieces.
3. In total, in the construction estimate we indicate the following number of foam concrete blocks: 1615+218=1833 pieces.
4. Find out the volume of dry glue for seams in load-bearing foam block walls. We have 14 horizontal (2.8/0.2=14) and 58 vertical (34.6/0.6=57.6 m) connections with a thickness of 0.005 m.
- The total length of horizontal seams: 34.6 × 14 = 484.4 m, the amount of glue for it: 484.4 × 0.3 × 0.005 = 0.7266 m 3.
- The length of the vertical seams is 58 × 2.87 = 166.64 m, respectively, the glue required is 166.64 × 0.3 × 0.005 = 0.24969 m 3.
The total consumption is 0.7266 + 0.2499 = 0.9765 m 3 or 1000 kg.
5. We calculate the glue for the construction of internal partitions with a total length of 14 m. We have 10 horizontal (2.8/0.3=9.3) and 24 vertical (14/0.6=23.4) seams.
Total length of connections: (14×10)+(24×2.8)=207.2 m.
Glue volume for interior walls: 207.2×0.2×0.005=0.2072 m 3 or 270 kg.
6. Total consumption of dry adhesive solution for a house made of foam blocks: 1000+270=1270 kg or 51 bags of 25 kg each.
When drawing up estimates for the roof, it is better to involve specialists. This is a complex structure, the construction of which is difficult to cope with on your own. The opinion of professionals will also be needed when calculating the costs of plumbing, insulation and cladding of the house.
Table of main construction costs
By combining all the cost items together, we get an estimate for building a turnkey house from foam blocks.
If you carry out the construction work yourself, then greater accuracy in the calculations is not necessary. It is enough to take into account the main cost items and find out the prices in force in the region.
| Construction materials | Quantity | Price RUR/unit | Total price, rubles |
|
Box at home |
|||
| Wall foam block | 40.82 m3 | 3000 | 122460 |
| U-shaped blocks | 20 pcs | 300 | 6000 |
| Adhesive for laying foam blocks | 650 kg or 26 bags | 220 | 5720 |
| Reinforcing rod d10 | 512 m | 15 | 7680 |
| Mineral insulation 50 mm thick | 5.5 cubes | 2450 | 13475 |
| Facing brick | 122.5 sq.m. | 1000 | 122500 |
| Cement mortar | 2 cubic meters | 2300 | 4600 |
| Net | 120 sq.m. | 80 | 9600 |
|
Foundation |
|||
| Concrete | 30 cubic meters | 3800 | 114000 |
| Reinforcing rod d12 | 200 m | 20 | 4000 |
| - d10 | 270 m | 16 | 4320 |
| Steel wire | 220 m | 0,50 | 110 |
| Ruberoid | 4 rolls | 300 | 1200 |
| Sand | 2.8 cubic meters | 500 | 1400 |
| Crushed stone | 2.8 cubic meters | 1700 | 4760 |
| Beam 150×150 | 0,65 | ||
| — 120×150 | 0,15 | ||
| — 100×150 | 1,5 | ||
| — 50×150 | 0,6 | 5000 | 14500 |
| Board 30×100 | 5 m 3 | 5500 | 27500 |
| Mineral wool 100 mm | 8 m 3 | 2300 | 18400 |
| Vapor barrier | 1 roll | 1500 | 1500 |
| Metal tiles | 68 m2 | 350 | 23800 |
| Total | 507 525 | ||
How to save money on building a house made of foam concrete?
First of all, cutting the budget will help right choice dimensions of foam concrete blocks. In cold regions main task construction is to preserve heat in the house. Foam blocks 600×300×200 mm are best suited for these purposes. They are convenient to lay in any way, varying the thickness of the box at home to the desired size. The number of blocks will always be the minimum possible and without unnecessary costs.
To reduce the construction estimate for the cost of foam blocks and other materials, it is better to contact the manufacturer directly. Prices for wholesale quantities can be reduced by 5-15%. You should not save money by buying cheap foam concrete of dubious quality for construction. The additional cost of correcting uneven walls in the house will cover the difference and may even exceed the estimate.
The price of ready-made factory-produced concrete looks more expensive than homemade mortar for building a house. But saving on manual kneading can result in large losses of working time and unnecessary labor costs.
When calculating the approximate cost of building a house made of foam concrete, you always need to add more bulk materials. When unloading, sand, crushed stone or gravel usually crumbles and remains on the ground. Additional procurement and transportation increase the cost of the entire construction.
When choosing a mixture for laying blocks, it is advisable to give preference to adhesive compositions special purpose. Their price is definitely higher than cement mortar. But the consumption is an order of magnitude less. In addition, foam concrete masonry with glue retains heat much better.
When building a house from foam blocks with brick cladding, you can make calculations easier by using an on-line electronic calculator. When ordering an estimate for a turnkey house made of foam blocks, it is advisable to contact several contractors at once. Prices for services are different for everyone, so it is not difficult to choose an option that is acceptable in terms of cost and delivery time. If necessary, you can always make amendments to the home estimate.
The estimate for the construction of a house is the main document that should be prepared before the construction of the facility. Its presence allows you to accurately plan expenses and decide on purchase suitable materials. The downside is that construction organizations often give an approximate amount, because it is difficult to predict the costs when building a wooden, frame, or brick house. There are many nuances that affect the final cost of construction. That is why large companies have entire departments dedicated to preparing estimates. If the company does not provide such a service, you have to contact special companies. Below we will consider what the essence of the estimate is, how to draw it up and provide a sample for a general understanding of the process.
The term “estimate” in relation to the construction of a house is a special document, without which no contractor begins work. When constructing a building, the largest costs are incurred building materials and wages for construction workers. That's why all the nuances are taken into account in the process of calculating the price:
- Scope of work performed.
- Technologies used.
- The period of construction of a house made of brick, foam block, aerated concrete or other material.
- The number of workers who are involved in the process.
- Project investment options and so on.
Having an estimate allows the owner to control progress construction work and construction costs. As a result, it is possible to create a schedule of activities and force builders to strictly adhere to the established plan. Often, when construction begins, owners play it safe and submit applications for estimates to several companies at once. However, the difference in the final price can be quite significant.
The reason for the difference in the final indicators is different prices from material suppliers, the individual cost of performing work for each company, and so on. Comparing estimate documentation obtained from different companies allows you to roughly estimate the costs of building a facility and take adequate measures to reduce costs.
How to draw up a construction estimate correctly?
During the calculation process, many costs are missed and not taken into account by customers. As a result, the final price turns out to be higher than the stated price. For example, the bureaucratic component leads to an additional 15-20 percent of costs. Transport costs may seem insignificant, but in reality they also amount to 5-10% of the planned budget.
When preparing estimate documentation, you should know the following:
- The calculation is carried out taking into account all document positions.
- If another company is involved in the calculation, the obtained parameters must be checked and adjusted to take into account current realities.
- Construction estimates should be coordinated with experts in this field.
In addition to minor expenses, a certain amount of funds should be planned for unforeseen expenses. They are allocated up to 2-4% of the total amount in the estimate. In this case, the real amount reaches 4-5%.
Estimate documentation - main element in construction, therefore its preparation is carried out according to special rules. Many of them work and remain unchanged since the times of the USSR. For example, previously estimates were prepared by organizations that were involved in the development of project documents. The organization took 10% for creating the project and another 1% for the estimate documentation.
Today, calculation processes are automated, special programs appear, and companies have before their eyes ready-made examples. All that remains is to insert the required parameters and give the command to perform the calculations. Despite the availability of software, difficulties arise in another aspect - the range of materials has increased, the number of suppliers and construction companies has grown. Overpayment or savings on estimate documentation depends on the qualifications of the employees who took on this work. At the same time, you should not save much on materials, because this leads to a loss of quality.
Types of estimates
In accounting, calculating estimates before the start of construction is not always possible. This is due to the regular increase in prices for raw materials, materials, people’s work and the tools used. You also cannot take into account the likelihood of force majeure, due to which the cost of work will be much higher. For this reason, until the advent of accurate calculations, it is worth using estimate calculations, on the basis of which object calculations are created. The latter are amended as necessary. Estimates are prepared using estimated standards, which are available in special documentation.
Local - estimates that are determined estimated price constructed structure. Such a document applies to all types of work and expenses. It is possible to draw up an estimate for an object as a whole or a category of work - building a foundation, erecting a roof, and so on.
Object estimate is a paper that contains information about the structure being repaired or constructed. Information is taken from the local estimate.
Consolidated estimate documentation - papers that are drawn up on the basis of object estimates for specific types of expenses.
Compilation methods
There are several calculation methods. To make the right choice, you should know the features of each of them:
- Labor-intensive method. This technique is used for structures with small dimensions. Construction company announces to the client the final costs that await him in the event of an order. In addition, problems with the delivery of materials are resolved directly by the contractor. With this method, no contract is drawn up, and the contractor does not guarantee anything. As a result, the estimate documentation contains “pitfalls” that are almost impossible to notice without a detailed study.
- Universal method. With this technique, the document includes a section in which the main works are listed by stages. With the help of such documents, it is easier to keep control over the construction process and costs. In addition, the customer has information on the cost of the materials used, as well as cost data. With the help of estimate documentation, it is possible to keep costs under control. For example, the structure of overhead costs includes employee wages, tax payments and additional expenses.
- Detailed estimate documentation. By the name of the method it is easy to judge its features. Drawing up such an estimate is necessary when carrying out construction work. In addition, a detailed statement of the estimate for the construction of the facility shows the customer the real state of affairs and the current cost of building materials (tools, work). Understanding the documentation is not difficult even for a customer uninitiated in the intricacies of its preparation.
Components of the estimate
As noted earlier, when drawing up estimates, many components are taken into account - the type of contractor, the type of activities performed, the characteristics of the work, as well as other aspects of the activity. That is why each estimate prepared by different companies has significant differences, and the final parameters will differ for the construction of different types of buildings.
In addition, the estimate documentation drawn up during the construction of a facility for your own needs will differ from that prepared by contracting companies. In the latter case, a number of elements are overlooked. If you decide to draw up an estimate yourself, you should understand its composition and adhere to the structure:
- General information about the document. This information is located on the title (first) page of the documentation. As a rule, they contain information about the contractor and the customer, as well as the name and date of preparation. In addition, details are indicated that would confirm the approval of the estimate documentation.
- Construction section. Here the information is grouped according to specific topics, which makes the papers easy to understand and interpret. Sections can have different names - “Finishing”, “Repair” and so on.
- List of materials. When filling out this section, the resource methodology discussed above is used, as well as a system of indexes for construction work (used in construction). For each position, personal information is presented - serial number, resource code in the directory, and so on. Estimate documents for an object are papers that contain information about the object being constructed (restored). Data is taken from local calculations and papers. The required number of materials, cost (for each specific unit) and total price are also given here.
- List of works according to construction estimates. In this section, for each item, the serial number, code, name and unit of measurement, the number and labor costs of workers and drivers, the number of man-hours, the average category of workers involved, tariffs, wages, and so on are indicated.
- A list of mechanisms, transport and devices that are necessary to carry out the work, taking into account the current construction estimate. For each of the positions, the following information is indicated - serial number, code, name of the vehicle (device, mechanism), measurement unit, number of units for operation, required number of equipment to perform the work, cost of the position, and so on.
- Total costs according to estimate documentation. A separate column indicates the size of the salary fund, the price of the materials used and the costs of using mechanisms and devices.
- Various coefficients, allowances, discounts, overhead costs, as well as other parameters that are calculated as a certain percentage of the total amount for the estimate.
- The VAT amount is a parameter that is calculated from the final parameters of the estimate documentation, taking into account additional information.
The estimate also indicates the total amount of the estimate, the full name and signature of the compiler and the inspecting party. These sections are usually enough to get general expenses for construction work.
How is the construction estimate calculated?
House made of timber
In order to properly invest money in the construction of a house made of timber, it is important to determine the quality of the materials used, the costs of transport and installation. When calculating costs, it is worth taking into account the type of structures used, the cost of a unit of production, the number of required objects, and the total price of the entire volume of materials. In addition, transportation and loader costs are added to this amount.
Timber is used as the main material. When drawing up estimates, it is important to calculate the volume of required timber, which is sold per cubic meter. meters. It is at this stage that difficulties arise. To deal with them, you should know the perimeter of the object (indicated in the technical documentation), and then multiply the resulting parameter by the height. The final number is then multiplied by the cross-sectional area. The total volume is obtained in cubic meters - this material is enough to construct the object. Next, it remains to include the number in the estimate, taking into account the market price.
An equally important stage is calculating the costs of roofing, finishing and foundation. It's worth starting from the foundation of the building. To solve the problem, multiply the perimeter by the thickness and height of the base. As a result, volume data remains on hand. Once the calculation is completed, all that remains is to find out the market price of one cubic meter of concrete, and then multiply the resulting parameter by the existing value.
Calculating the roofing material is easy. Take the roof area from the project, then multiply the parameter by the cost per square meter of the selected material. It is more difficult to calculate the costs of finishing, because here they apply different types materials. When calculating, the cost of the wall is multiplied by the price per square meter of each material separately. After completing the calculations, all that remains is to combine the costs and summarize the results.
Estimate for the construction of a frame building
Calculation of costs during the construction of a frame building occurs according to the same principle as discussed above. The difference lies in the material used. To perform calculations, it is worth having information on the shape and size of the structure at hand. It is also worth considering the costs of roofing, finishing and installation of the base. The estimate includes transportation and loading costs. Important point- allocation of a certain percentage of costs for force majeure. These points are sufficient when drawing up an estimate for the construction of a frame building.
Foam block house
To accurately calculate the estimate, it is worth determining the material that will be used during construction work. There are three types of blocks for construction - foam concrete, aerated concrete or expanded clay concrete. The best solution for today is the use of aerated concrete (including from a price point of view). If a house is being built with an area of 300 square meters or more, then the total price of aerated concrete will be from 30 thousand rubles.
Sample
To make it easier to draw up estimates for construction, it is important to have a ready-made sample document before your eyes.
Every time a construction project is started, one has to calculate the financial costs, regardless of whether the house is being built with one’s own hands, with the help of neighbors, or by professional builders. Significant differences will be in the timing, quality of work performed, but most importantly - in the price of the entire event.
You can reduce risks and get high-quality results by engaging a certified professional contractor. The preliminary cost of building a house can be calculated using an online construction calculator.
Calculation methods for construction work
Calculations can be made in three ways:
- Measurements based on the design area.
- Calculations based on built-up area.
- Determination based on construction volumes.
The first two methods result in an inflated estimate. It includes additional costs for the expected overconsumption of material and an acceptable increase in its cost. The possibility of additional unforeseen costs is taken into account.
The third approach (calculation based on real volumes) is more accurate and objective. He takes into account the work that will be directly carried out. The volume of completion for each construction segment is calculated. Therefore, at the stage of drawing up estimates, the customer has the opportunity, without disturbing the project, to make his wishes for individual structures (for example, for floors, roofing). Deviations from the total cost are possible within 15%.
According to the latter principle, unlike many other resources, a unique mathematical calculator for calculating the construction of a house from the website works.
Calculation algorithms for an online calculator for building a house
The calculation is based on simple mathematics. First, to determine the volume, you need to set the width, length and height (thickness) of a certain structure.
Secondly, the building codes and regulations that apply to the specific structures chosen for the project are taken into account.
Thirdly, the current price of the materials used, the tools used, the equipment used, and the labor of specialists is taken into account. It is important that our prices for building materials are stable and there are no sudden jumps. This is possible thanks to the presence of our own warehouse store with materials.
Fourthly, the calculations are based on existing and tested drawings. Therefore, when designing a house on our construction calculator you get a result that is associated with actually implemented projects. The constant practice of contracting work allows us to take into account all, even small, current costs. That is why construction cost calculations using this online calculator are more accurate than those obtained from similar services.
Fifthly, the reliability of the result is ensured by adding up separate calculations for each construction segment:
- laying the foundation;
- construction of walls and ceilings;
- roofing work with chimney installation;
- installation of stairs, windows, doors;
- façade design.
In addition, you can use our calculator to calculate the cost of building or repairing individual structures of your home.
Features of the formation of the price of work for different elements of the structure
Foundation
Before starting calculations, you need to decide on the type of its design. The settings of our computer provide the following foundation options:
- strip on stilts;
- tiled monolith;
- monolith with a base;
- with a ground floor.
The design is selected taking into account the mass of the designed structure and the geological features of the soil at the site.
Next, for calculations, you need to indicate the dimensions of the desired building (width, length) and the thickness of the foundation. We get three numbers: the price of the work, the cost of materials, and the final cost. This result will appear at every stage.
The scheme is similar. We choose which walls we will build and the height of the floor. We suggest paying attention to:
- cellular concrete blocks;
- walls made of ceramic bricks;
- porous ceramic blocks.
It is worth knowing that the calculator will calculate the construction of a house from blocks a little more expensive than in the case brickwork. But we advise you to initially choose material based on characteristics, not price.
Floors
The construction of floors is of particular interest due to its ability to combine various options. The online construction calculator offers you to select floors for the basement and floor separately. Also note the difference in design:
- wooden or glued beams;
- concrete slabs or monolith.
In your choice, it is important to proceed from general requirements to the structure under construction and financial capabilities. With proper selection of floors, you can even save money. For example, it is better to use concrete between the basement and the first floor. The house will be better protected from moisture coming from below, and the floors will withstand more weight. Wood can be used as the basis for the attic floor, which is less durable than concrete, but cheaper. This will also improve thermal insulation.
If you insure yourself as much as possible in terms of fire safety, it is better to turn to concrete partitions. However, it is important to consider the possibilities load-bearing structures(foundation, walls) in terms of withstanding significant loads.
Roof and chimney
The difference in their range is only in price and aesthetics. The elements fully perform their functions, regardless of price. Pay attention to the following types of tiles:
- natural;
- composite;
- bitumen (soft);
- metal.
The latter option is characterized by the greatest prevalence in modern construction. The chimney pipe can be chosen from brick, ceramics or stainless steel.
Ladder
The staircase is one of the elements of the house that cannot be defined by volume. An online calculator for calculating the construction of a house determines the price of stairs based on the material of manufacture and the number of floors. They can be wooden, metal, monolithic (made of reinforced concrete).
Windows, doors
A unique feature of the site’s house construction calculator is that it takes into account the areas allocated for window and door openings. When you indicate the number of windows and doors, the final price of building a house according to the calculator will be lower due to the reduction in the calculated volumes of materials for the walls.
External finishing is needed not only for the exterior, but also for the heat and sound insulation of the building. An online calculator for determining the cost of building a house shows options for facade design using:
- clinker tiles;
- facing bricks;
- “wet façade” technologies;
- ordinary plaster.
The latter option is cheaper, but the plaster must be applied to walls whose thickness provides thermal protection.
Using a construction calculator on the site will help you not only imagine the cost of the work, but also develop a preliminary detailed design of a house made of aerated concrete. The accuracy of the calculations is guaranteed by a combination of theoretical calculations with real experience implementation of many construction projects.
Today, after updating the estimate and regulatory framework - GESN, TER and FER, it will no longer be difficult to draw up an estimate for the construction of a house and calculate the exact cost of the work.
Whether you are a private developer - building a house for yourself, or a large investor - building a house with a thousand apartments - building a house without an estimate, as they say, is “more expensive for yourself.” After all, the estimate includes all the costs necessary to build a house.
In this article we will look at the main stages of drawing up an estimate for the construction of a private house and you will be able to download it.
In our example, we will not take into account all possible complicating construction factors; we will assume that the cost estimate takes place under standard construction conditions. Let's take the area of the house to be 100 m2 (10*10).
Of course, if you are not going to put up a tent or temporary shelter, then you cannot do without taking into account the cost of excavation work in the estimate. After all, to lay a foundation it is necessary, in the literal sense of the word, to “prepare the ground.”
We will excavate the soil for the foundation using a mechanized method. The volume of the pit is 100 m 3 (10*10*1), where 10 is the length of the side of the house, and 1 is the depth of the pit. To calculate the cost of these works, let's take the price:
FER01-01-013-03 Soil development with loading onto dump trucks using excavators with a bucket capacity: 1 (1-1.2) m 3, soil group 3 - 100 m 3
Pay attention to "soil group 3". In the Technical Part of the collection FER01 Earthworks, all groups of soils are indicated, in our case these are “gravel sands”, which are more common in the central part of Russia. By the way, it’s not in vain that we are digging a pit 1 m deep, because the depth of soil freezing in the same area is 900 mm.
Foundation
Let us take as a basis a strip monolithic reinforced concrete foundation. We design the foundation for external walls, i.e. along the perimeter of the house, as well as under load-bearing walls - conventionally, these are two walls that intersect in the center of the house. Let's calculate the volume: 10 * 6 * 0.5 = 24 m 3, where 10 m is the length of the external and internal walls, 6 m is the number of load-bearing walls (4 - along the perimeter of the house and 2 - intersecting in the house), and 0.5 m - this is the thickness of the foundation. Now let’s select a price for our estimate for building a house:
FER06-01-001-22 Device strip foundations: reinforced concrete with a top width of up to 1000 mm - 30 m 3
Columns
The most optimal and common option is to install reinforced concrete columns at the intersections of load-bearing walls. Firstly, columns add strength to the structure, in our case, a house, and secondly, by building one-story house you can safely rebuild it into a two-story building.
Let's calculate the volume of our columns: 9 * 3.5 * 0.4 * 0.4 = 5.04 m 3, where 9 pcs. - the number of columns (8 along the perimeter and 1 in the center), 3.5 m is the height of the column, and 0.4 m is the length and width of the column. For an estimate for the construction of our house, we take the following price:
FER06-01-026-15 Construction of reinforced concrete columns in wooden formwork with steel cores (rigid reinforcement) perimeter: up to 2 m - 5.04 m 3
Load-bearing walls
Before calculating the amount of work involved in constructing the walls, let’s determine for ourselves that we will make all the load-bearing walls (remember, we made the foundation for them) from common cinder block (w19*h19*d39) and place it in two rows, i.e. The wall thickness will be 400 mm.
In front of everyone known parameters(the length of the walls is equal to the length of the foundation, the height of the walls is equal to the height of the columns, and the thickness is equal to the thickness of the masonry) we obtain the volume of the masonry 60 * 3.5 * 0.4 = 84 m 3.
Let's continue to draw up our estimate for building a house and take the following price for laying load-bearing walls:
FER08-03-002-01 Laying walls of lightweight concrete stones without cladding: for floor heights up to 4 m - 84m 3
Beams
For structural rigidity, our columns must be connected at the top with a beam. The construction of the beams could be carried out simultaneously with the columns or a stage after the columns, but then there would be difficulties with the installation of formwork for them. And so, at this stage, the walls act as the lower part of the formwork, which greatly simplifies the work of tying reinforcement and laying the concrete mixture.
Let's calculate the amount of work. The length of the beams is equal to the length of the foundation, and the section of the beam is equal to the section of the columns - 400 * 400 mm. From here we get 10.6 m3. For an estimate for building a house, choose the price:
FER06-01-034-02 Construction of beams for ceilings, cranes and strapping at a height from the supporting platform: up to 6 m with a beam height of up to 500 mm - 10.6 m 3
By the way, it was not for nothing that we postponed the process of installing beams. We combine the tying of the reinforced frame of the beams and the pouring of concrete with the tying of the reinforced frame of the floor and its concreting.
The ceiling, in addition to being the ceiling of the first floor in our house, can also, in the future, serve as the floor of the attic or second floor. That's why we'll make it reinforced concrete!
For our estimate for building a house, the volume is calculated very simply - the area of the house is multiplied by the thickness of the floor - 100 * 0.16. Let's choose a price:
FER06-01-041-01 Construction of beamless floors with thickness: up to 200 mm at a height from the supporting area up to 6 m - 16 m 3
Roof
At the first stage, we will add rafter installation to the estimate at the following price:
FER10-01-002-01 Installation of rafters - 5 m 3
On the second, we will cover our roof with galvanized iron. Let's add about 30% to the area of the house and get the area of our roof, taking into account the overhangs and slope. Let's take the following estimate:
FER12-01-007-09 Installation of galvanized steel roofs: with wall gutters - 130 m 2
Conclusion
Well, that's all - our home is ready! The author should not be blamed for the fact that he did not take into account all aspects of this construction and drawing up an estimate; the task was simply to show how an estimate is drawn up and the amount of work is calculated.
And, as promised at the beginning of the article...