Carpet Area vs Built-up vs Super Built-up: What You Actually Get
Brokers quote one number. Your loan and lifestyle depend on another. Here is how carpet, built-up, and super built-up area differ — with a simple example.
When you walk into a sample flat, the sales person will talk about "1,450 sq ft". Sounds spacious. But that number might be super built-up area — and the space you actually live in could be hundreds of square feet less.
Before you compare projects or negotiate price per sq ft, you need to know which area everyone is quoting.
The three numbers brokers mix up
Carpet area
Carpet area is the net usable floor area inside your walls — where you can literally lay carpet. It typically includes:
- Bedrooms, living, kitchen, bathrooms
- Internal walls between rooms
- Balcony (in many states, if enclosed)
It does not include external walls, common areas, or shaft space.
Under RERA, developers in many states must quote carpet area in agreements and marketing for registered projects. That is the number closest to "what I actually get."
Built-up area
Built-up area = carpet area + wall thickness + balcony (as defined in the agreement) + other exclusive areas attached to your unit (e.g. flower bed, dry balcony in some projects).
Think of it as "your flat's footprint" including its share of structural walls.
Super built-up area
Super built-up area (also called saleable area) adds a proportionate share of common areas:
- Lift lobby and corridors
- Clubhouse, gym (sometimes)
- Staircases, lift shafts
- A slice of the garden or driveway
Developers often price on super built-up because it is the largest number. A flat with 1,000 sq ft carpet might show as 1,450 sq ft super built-up — a 45% markup on paper.
A simple example
Imagine Project X quotes 1,450 sq ft super built-up at ₹5,500 per sq ft.
| Measure | Sq ft | What it means |
|---|---|---|
| Super built-up | 1,450 | Number on the brochure |
| Built-up | ~1,250 | Includes walls; still not full usable space |
| Carpet (RERA) | ~1,050 | What you actually furnish and live in |
Total price = 1,450 × 5,500 = ₹79.75 lakh (on super built-up)
Effective price per carpet sq ft = 79,75,000 ÷ 1,050 ≈ ₹7,595
That second number is what you should compare when evaluating value — not the brochure rate alone.
Why this matters for your EMI
Banks often sanction loans on agreement value, not on "carpet sq ft sanity". If you overpay because you compared super built-up rates across cities without normalising to carpet, your EMI is higher for the same usable space.
Ask explicitly:
- What is the RERA carpet area in the agreement?
- Is the quoted rate on carpet, built-up, or super built-up?
- Can I see the area schedule in the draft agreement?
Red flags at the site office
- Brochure only shows super built-up; staff dodge carpet questions
- "Loading factor" above ~35–40% without a clear breakdown
- Sample flat feels smaller than the number on the wall — trust the tape measure, not the poster
What to do before you pay a token
- Get carpet area in writing (email or draft agreement annexure).
- Compare price per carpet sq ft across 2–3 projects in the same micro-market.
- Measure the sample flat if you can — room dimensions × count beats marketing adjectives.
Bottom line
Super built-up is what they sell. Carpet area is what you live in. RERA pushed transparency, but old habits die hard — especially in resale and unregistered projects.
Decode the number before you decode the EMI. Your future self — the one arranging furniture — will thank you.
Not legal or financial advice. Always verify with RERA, your bank, and a lawyer.