⚖️ Expose The Loading Factor

RERA Carpet vs Super Built-up Area

Don't get tricked by the builder's brochure! Find out the actual usable living space inside your flat by calculating the exact RERA Carpet Area.

Super Built-up Area Includes Lifts, Lobbies, Clubhouse
RERA Carpet Area Actual Usable Floor Space inside flat
📏
*Usually 10-15% of Carpet Area
*Usually 20-35% of Built-up Area
Area Composition Mapping
Carpet
Walls
Loading
■ Carpet (0%) ■ Walls/Balcony (0%) ■ Common/Loading (0%)
RERA Carpet Area Net usable floor area. Actual space where you can lay a carpet inside the flat. Excludes outer walls and balconies.
0 Sq. Ft.
Built-up Area RERA Carpet Area + External Walls thickness + Exclusive Balconies and Terraces.
0 Sq. Ft.
Super Built-up Area Built-up Area + Proportionate share of common areas (Lobby, Lifts, Stairs, Amenities). Also known as Salable Area.
0 Sq. Ft.
🚨 RERA Act 2016 Warning

Under Section 4 of the Real Estate (Regulation and Development) Act, it is illegal for developers to sell property based on the Super Built-up Area. The builder is legally bound to quote the price strictly on the RERA Carpet Area. Always divide the total flat cost by the Carpet Area to find your True 'Price per Sq.Ft.'!

Why Builders use Super Built-up Area: If a flat costs ₹1 Crore, a builder will divide it by the Super Built-up Area (e.g., 1500 sq ft) to show a lower rate of ₹6,666/sq ft. But the actual usable space is the Carpet Area (e.g., 1060 sq ft), which means you are actually paying a massive ₹9,433/sq ft for the space you live in! Be smart, always calculate on Carpet.

RERA Area Calculator: Carpet vs. Built-up vs. Super Built-up (2026)

💡 Bhai Ki Advice (Builder Trap): Builder hamesha aapko “Super Built-up Area” batayega kyunki usme lift, seedhiyaan (stairs), aur lobby ka area bhi juda hota hai. Par yaad rakho, RERA ke rules ke hisaab se builder ko ab “Carpet Area” batana compulsory hai. Agar builder sirf Super Built-up bata raha hai, toh samajh lo kuch gadbad hai. Is tool se check karo ki aap “Hawa” (Common areas) ke liye kitna extra paisa de rahe ho!

Understanding the different types of area measurements is crucial before signing any property deal in India. RERA (Real Estate Regulatory Authority) has made it mandatory for developers to sell apartments based on Carpet Area rather than the misleading Super Built-up Area. Our RERA Area Calculator helps you deconstruct these terms, allowing you to calculate the actual livable space and the efficiency ratio of your future home.

Definitions You Must Know Before Buying

Don’t get confused by real estate jargon. Here is the simple breakdown:

  1. Carpet Area (RERA): Simple bhasha mein, ye wo area hai jahan aap “Carpet” bicha sakte ho. Isme inner walls ki thickness shamil hoti hai par balcony aur terrace ka area shamil nahi hota.
  2. Built-up Area: Ye Carpet Area + Outer Walls ki thickness + Balcony ka total area hota hai. Ye usually Carpet Area se 10-15% zyada hota hai.
  3. Super Built-up Area: Isme Built-up Area ke sath-sath common areas jaise lift, lobby, clubhouse, aur swimming pool ka hissa bhi add kar diya jata hai. Pro Tip: Efficiency Ratio check karo! Agar Super Built-up aur Carpet area mein 30% se zyada ka fark hai, toh deal mehngi ho sakti hai.

Frequently Asked Questions (RERA Rules)

1. Is balcony included in RERA Carpet Area?
No. Under the RERA definition, Carpet Area does NOT include external walls, areas under service shafts, exclusive balcony or verandah areas, and exclusive open terrace areas. It only includes the net usable floor area of the apartment including internal partition walls.
2. What is the standard loading factor in Indian apartments?
The ‘Loading Factor’ is the difference between Super Built-up and Carpet area. In India, a healthy loading factor is usually between 25% to 35%. If a builder is charging for 40-50% loading, you are paying significantly more for common amenities than your actual living space.
3. Can a builder change the Carpet Area after booking?
As per RERA, a builder can only change the area by up to 3% during construction. If the area increases, the builder can ask for extra money (capped at 3%). If it decreases, the builder must refund the difference with interest to the buyer.
4. Why do builders still talk about Super Built-up Area?
Builders use Super Built-up Area to make the “Price per Square Foot” look lower. Desi Logic: ₹5,000 per sq.ft. (Super Built-up) sunne mein ₹7,000 per sq.ft. (Carpet) se sasta lagta hai, par end mein aap wahi paisa de rahe hote ho. Hamesha final cost ko Carpet Area se divide karke ‘Actual Rate’ check karein.
5. How to calculate Carpet Area from Built-up Area?
A rough thumb rule used in India is that Carpet Area is approximately 70% to 80% of the Super Built-up Area. However, using our calculator with exact wall and balcony dimensions will give you a 100% accurate RERA-compliant figure.

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