Complete guide to understanding carpet area, built-up area and super area. What you actually pay for vs what you get in Tricity flats.
Understanding area measurements is crucial for property buyers. Builders quote different kinds of area, and not knowing the difference can cost you a lot. Carpet Area Carpet area is the actual usable floor area inside your flat. This is the space where you could lay a carpet, hence the name.
By Property1313 Team · Updated August 22, 2026
Property1313 Team · August 22, 2026 · 2 min read
Understanding area measurements is crucial for property buyers. Builders quote different kinds of area, and not knowing the difference can cost you a lot.
Carpet Area
Carpet area is the actual usable floor area inside your flat. This is the space where you could lay a carpet, hence the name.
Under RERA, carpet area means the net usable floor area of the flat, including the area covered by internal partition walls, but excluding external walls, service shafts, exclusive balconies or verandahs and exclusive open terraces.
Built-Up Area
Built-up area = Carpet area + wall thickness + balcony/terrace area
This adds the external walls of your flat and any private balconies or terraces.
Super Area
Super area = Built-up area + share of common areas
Common areas include: lobby, staircase, lift shaft, corridors, clubhouse, swimming pool, gym and other amenities.
Understanding Loading Factor
Loading factor = (Super area - Carpet area) / Carpet area x 100
This tells you how much extra area you pay for beyond the space you can actually use.
Example Calculation
For a flat with: Carpet area: 1,000 sqft, Built-up area: 1,200 sqft, Super area: 1,500 sqft
Loading factor: (1,500 - 1,000) / 1,000 x 100 = 50%
You are paying for 1,500 sqft but only getting 1,000 sqft of usable space.
Comparing Loading Across Projects
There is no fixed standard for loading. It depends on how many amenities a project has and how its towers are designed. Lower loading means more of what you pay for is usable, so compare it across the projects you shortlist and ask why it is high.
RERA Guidelines
Under RERA, the price in the agreement must be based on carpet area. If a builder quotes super area, ask for the carpet area and the breakdown in writing.
What to Ask Your Builder
What is the carpet area of this unit? What is the loading factor? Which common areas are included in super area? Is the carpet area written in the agreement?
Property1313 can help you read the area figures on any listing and ask the builder for the carpet area before you book.