- In this article I am going to explain how a Detailed Work Estimate of a house should be… done in a technically correct way so that you have the EXACT AND REAL QUANTITY of each of the materials you need to build your house.
- You will also have the values of each of the Manpower activities to pay the Master of Works.
- You can also download the budget for a two-story house in Excel.
A Work Budget Must Be Prepared Specifically For Each House.
The first thing you should know is that, although some of the same materials are handled in all the houses (cement, steel blocks, sand, etc.) the amounts of each of these materials will be different for each house.
Why? Because depending on the design, each house will have a different amount of m2 of wall and therefore, it will also have different amounts of linear meters of foundations and all other components.
Therefore, do not let anyone tell you that it is not necessary to have a design and plans. Do not be fooled by the fact that he is a teacher, engineer or architect with “a lot of experience” and that is why he can tell you how much material you need to build a 100 m2 house.
How To Make A Budget Of A House. Can I Have A Table Of Construction Materials Per M2?
Let’s see how an Architect does to calculate materials.
For the manufacturing process to be technically correct, two prerequisites must be met:
• There must be COMPLETE detailed architectural, structural and installation plans.
• The budget must be prepared by an ARCHITECT WITH EXPERIENCE in the subject.
The process consists of two steps:
1. On the plans in AutoCAD the Architect extracts the measurements of each and every one of the activities that must be carried out to build the house. It is here where it is said that, for this house, 33 linear meters of foundation beams will be built; 3.5 cubic meters of Concrete Columns; 92 square meters of mezzanine plate and many more…
2. Based on these quantities and what is contained in material for each meter of each activity, the Architect with his performance tables, called APU, will finally produce the two results that really interest you: The labor price list and the List of materials to build THIS house
List Of Labor Prices To Build A House.
The Architect will give you a list with the fair value that you must pay the master builder for each activity he performs.
It is convenient that you have this list in Excel so that, during the construction, you yourself can only pay for the activities that have already been completed and, incidentally, you can control what you have already paid for labor.
As you can see this tool will prevent you from making several mistakes:
- That you pay prices higher than the fair labor market.
- It will also help you not to pay for activities that you have not finished.
- You can also control the payments already made so that you do not pay anything twice, nor do the values rise during construction.
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Amount Of Materials To Build A House.
It is not convenient for someone to calculate “by eye” the quantities of all the materials for THIS house.
This will very surely bring some problems as a consequence:
On the one hand, you will have some materials left over and on the other hand, you will have to buy many times of other materials…
All because this work must be done in a technical way as I explained before and not “by eye”
In addition to the labor values, the Architect must calculate to give you a list in Excel of all the materials that you will need.
With this list you will be able to enter each purchase and subtract the quantities that you buy of each material
How To Control Construction Costs Yourself.
When you have a technically prepared budget in Excel, as the work progresses you enter the purchases so you know how much you need to spend on purchases and therefore, how much you still have to spend on Materials.
Likewise, you will be able to control which activities the teacher has finished in order to pay them only once at the correct price… no more, no less.
All these controls are done to the right of the Excel table that the Architect gives you.
Common Mistakes. !Alerts Against Cheating.
To finish, I’ll give you some tips so you don’t get fooled by some unscrupulous “professional”.
• If you pay an Architect to design you, he himself should give you those complete designs (structural, Hydraulic, electrical plans) and also the detailed budget. Do not accept a general “approximate” of the value, it must give you the lists mentioned above.
• If you have already contracted only the architectural designs or in some way or you already have them, you must complement them with the Structural, Hydraulic, electrical plans and the Detailed Budget.
• A Master of works is to direct the group of workers or crew of labor. DO NOT hire him to tell you how much materials you need so that he can calculate them “by eye” and make you make mistakes.
• Nor should you ask the same teacher how much labor is worth. It’s obvious why. If you ask several Masters, some will give you very high values and others will give you very low values because they do not have a guide of the activities that they have to execute.
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