Carpet Area vs Built-Up Area vs Super Built-Up Area: Difference, Formula and RERA Meaning
Quick answer:
- Carpet area: the usable floor area inside your home's walls.
- Built-up area: carpet area plus the walls and your exclusive balcony.
- Super built-up area: built-up area plus your share of common spaces such as lobbies, lifts and the clubhouse.
Under the RERA Act, 2016, builders must disclose the carpet area of every apartment, so use carpet area to compare homes.
Why read this, and how it helps you
Why does one 1,800 sq ft flat feel bigger than another? Because brochures quote three different areas. Here's how carpet, built-up and super built-up area differ, how to calculate loading, and how to compare projects fairly.
Example figures for illustration. Sources: RERA Act 2016 s.2(k); ANAROCK Q1 2026 (price basis: built-up).
If you have visited more than one project, you have probably noticed that an "1,800 sq ft" home in one tower can feel very different from an "1,800 sq ft" home in another. The difference is usually which area is being quoted.
What is carpet area?
Carpet area is the area you can actually use: where you lay a carpet, place furniture and walk.
The Real Estate (Regulation and Development) Act, 2016, Section 2(k) defines it as the net usable floor area of an apartment.
- It excludes: the area covered by external walls, areas under service shafts, exclusive balcony or verandah area, and exclusive open terrace area.
- It includes: the area covered by internal partition walls.
What is built-up area?
Built-up area is the carpet area plus:
- the thickness of the external walls
- any exclusive balcony, verandah or utility area attached to your home
It describes the full footprint of your apartment.
What is super built-up area?
Super built-up area, often called saleable area, is the built-up area plus your proportionate share of common areas, such as:
- entrance lobbies
- staircases and lift wells
- corridors
- amenities such as the clubhouse
In large gated communities with extensive amenities, this share can be significant.
The three areas at a glance
- Carpet: What it includes: Usable floor area + internal walls; Use it to: Compare homes fairly
- Built-up: What it includes: Carpet + external walls + exclusive balcony; Use it to: Understand your home's footprint
- Super built-up: What it includes: Built-up + share of common areas; Use it to: Read brochure prices correctly
Loading, explained (with formula)
The gap between carpet area and super built-up area is called loading.
Loading % = (Super built-up area ÷ Carpet area − 1) × 100
Example: a home with 1,200 sq ft of carpet area, sold as 1,680 sq ft super built-up:
- 1,680 ÷ 1,200 = 1.40
- Loading = 40%
Why loading isn't automatically bad
Higher loading often reflects:
- larger clubhouses
- wider corridors
- more amenities
What matters is whether you will use what you are paying for. A community with two clubhouses and two pools will carry more common area than a small building with none.
How to compare two projects fairly
- Ask for the RERA carpet area of the exact unit.
- Check that balcony and utility areas are listed separately.
- Divide the total price by carpet area for the price per carpet sq ft.
- Compare what the common areas actually give you: clubhouse size, pools, open space.
- Verify everything in the agreement for sale.
Tip: At Honer Signatis, the floor plans show the RERA carpet area of every home, including ultra-premium apartments with a 140 sq ft sit-out.
Frequently asked questions
Is balcony area included in carpet area?
No. Under RERA, exclusive balcony or verandah area is excluded from carpet area and is usually shown separately.
Is RERA carpet area different from the old "carpet area"?
It can be. RERA carpet area includes internal partition walls, which some older definitions left out.
What is a reasonable loading percentage?
There is no fixed rule. Larger communities with more amenities carry more loading. Compare carpet area and the amenities you will use.
Is the price charged on carpet area or super built-up area?
Practices vary, but the agreement must disclose the carpet area. Always compute your cost per carpet sq ft.
How do I calculate loading?
Loading % = (super built-up area ÷ carpet area − 1) × 100. For example, 1,680 sq ft super built-up on 1,200 sq ft carpet area is 40% loading.
What is the difference between built-up area and super built-up area?
Built-up area is your home's carpet area plus walls and exclusive balcony. Super built-up area adds your share of common areas such as lobbies, lifts, corridors and the clubhouse.
Which area should I use to compare two flats?
Use the RERA carpet area and the price per carpet sq ft, then compare what the common areas actually give you.
See exact carpet areas on our floor plans. Call +91 83026 16666 or book a visit.
Sources: The Real Estate (Regulation and Development) Act, 2016, Section 2(k); Telangana RERA (rera.telangana.gov.in).
