How to Calculate Built-Up Area from Plot Area
When buying or constructing a property, one of the most common questions buyers have is — “How do I calculate the built-up area from the total plot area?” Understanding this helps you know how much space you’re truly getting and how much you can build on your land.
What Is Plot Area?
Plot area refers to the total land you own — including:
The area covered by the building
The open space around it such as garden, parking, or pathways
Example:
If you own a 2,000 sq. ft. plot, that’s your total plot area.
What Is Built-Up Area?
Built-up area is the total area covered by the building — including:
- Carpet area (usable indoor area)
- Wall thickness
- Balcony or terrace (if attached)
In simple terms:
Built-Up Area = Carpet Area + Wall Area + Balcony or Terrace Area
What Is FAR or FSI
The Floor Area Ratio (FAR) or Floor Space Index (FSI) decides how much construction is allowed on a plot.
Formula:
Built-Up Area = Plot Area × FSI
Example:
If your plot area is 2,000 sq. ft. and the FSI is 1.5,
then Built-Up Area = 2,000 × 1.5 = 3,000 sq. ft.
This means you can build a total of 3,000 sq. ft. of covered space — which can be distributed across floors.
Example Calculation
Let’s say:
- Plot Area = 2,000 sq. ft
- FSI = 1.5
Then:
- Total Built-Up Area = 3,000 sq. ft.
You could build: - Ground floor: 1,500 sq. ft.
- First floor: 1,500 sq. ft.
So, your total construction is within the permissible limit.
Factors That Affect Built-Up Area
- Location and zoning rules – Urban areas often have lower FSI to control congestion.
- Type of land – FSI varies for residential vs. commercial plots.
- Road width – Wider roads often allow higher FSI.
- Building type – Independent villa, apartment, or row house can affect total built-up area allowed.
Difference Between Carpet, Built-Up, and Super Built-Up Area
| Type | Includes | Excludes |
|---|---|---|
| Carpet Area | Actual usable area inside the walls | Walls, balcony, staircase |
| Built-Up Area | Carpet area + walls + balcony | Common areas |
| Super Built-Up Area | Built-up + proportionate share of common areas | – |
Tip for Buyers
Always ask your builder for an FSI utilization plan and approved building layout before finalizing your property. It ensures your construction follows legal norms.
Our Projects
If you’re looking to invest in NA plots with clear FSI and ready infrastructure, check out:
Each project offers clear titles, NA plots, and great appreciation potential for both investment and villa development.