Calculating the Total Construction Area

he Total Construction Floor area sums all areas for all building floors. This includes the surface area and thickness of exterior walls (excluding voids), excavated basement areas, and inner and outer balconies.

The Construction Area also includes parking lots, where the asphalted surfaces are considered in the total built area.

Let’s take an example to make things clearer. This is a 5 storey flat located on a plot area of 810 sq.m
We are given three floor plans (The Ground floor plan, The Typical Floor plan, and the Roof Floor plan).

To find the Building Area or the total Construction Area we need to find the construction area for each floor and sum them up.

Let’s have a look at the Ground Floor Plan;

1-    The Ground Floor plan:


The space in white shows the asphalted area outside the building. The walls within that space show the lobby space for the flat building. In this case the white shaded space is the part that is constructed. So according to that,

The Total Construction Area in the Ground Floor is:
= 139 + 139 + 38 = 316 sq.m

Next, let’s take a look at the Typical Floor Plan;

2-    The Typical Floor plan

Once again, the space in white indicates the construction area/built area. This recall includes the wall thickness.
In this case the total area including the walls is = 312 sq.m
Because there are three typical floors we multiply that number by 3

Total Construction Area in Typical floors = 312 sq.m x 3 = 936 sq.m

3-    The Roof Floor plan

Unlike in the case of the Ground Floor, the Roof plan will consist only of the covered floor areas. This means the space that is outlines in red. This also includes the wall thickness.

Total Construction Area in Roof Floor = 34 sq.m

Now let’s take a look at the Sum of the construction area for this project.
Total C.A = 316 sq.m + 936 sq.m + 34 sq.m = 1286 sq.m

Well, that pretty much sums it all up. If you have any questions related to this topic, feel free to leave a comment and I’ll be happy to help.

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