RERA Carpet Area & Super Built-Up Loading Calculator
Convert between RERA Carpet Area, Built-Up Area, and Super Built-Up (Saleable) Area. Unmask builder loading markups (20%–45%) and calculate the true price per square foot of usable living space.
Direct Answer: What is Carpet Area vs Super Built-Up Area?
RERA Carpet Area is the net usable floor space within inner apartment walls. Super Built-Up Area inflates this by 25% to 40% (Loading Factor) to include common lobbies, lifts, and staircases. A 1,000 sq.ft carpet home with 30% loading has 1,300 sq.ft super built-up, raising the true cost per usable sq.ft by 30%.
RERA Carpet Area, Built-Up & Super Built-Up Calculator
Statutory usable floor area within inner apartment walls
Common space markup percentage over RERA carpet area
Headline rate quoted by builder on Super Built-Up area
Under RERA 2016, exclusive balconies and utility spaces cannot be merged into Carpet Area.
Apartment Area DistributionRERA Breakdown
Itemized RERA Space Classification (From Inner Walls to Common Core)
| Architectural Component | Area (Sq.Ft) | Area (Sq.M) | Share of Super Built-Up | Statutory RERA Status |
|---|---|---|---|---|
| Usable Bare Floor Carpet AreaLiving, bedrooms, kitchen, bathrooms | 808 sq.ft | 75.1 sq.m | 74.3% | Included in Carpet |
| Internal Partition Walls4.5-inch internal room dividing walls | 42 sq.ft | 3.9 sq.m | 3.9% | Mandated under Sec 2(k) |
| Total RERA Carpet Area | 850 sq.ft | 78.97 sq.m | 78.1% | Mandatory Sale Base |
| Exclusive Balconies & Utility AreaDry balcony, open verandah | 110 sq.ft | 10.2 sq.m | 10.1% | Excluded from Carpet |
| External Wall Thickness50% shared party walls + outer skin | 60 sq.ft | 5.6 sq.m | 5.5% | Part of Built-Up Area |
| Proportionate Common Areas (Loading)Lobbies, staircase, lifts, clubhouse | 68 sq.ft | 6.3 sq.m | 6.3% | Super Built-Up Only |
Plot Owner / Independent Builder Tool: FAR & FSI Estimator
Calculate maximum permissible gross built-up area allowed on your plot by municipal authorities.
How Carpet Area is Calculated under RERA (Section 2(k) Guidelines)
Prior to RERA (2016), Indian real estate developers sold flats on ambiguous "Super Built-Up" measurements with arbitrary loading factors exceeding 45%. RERA standardized the legal definition to protect buyers:
Includes living rooms, bedrooms, kitchen, and attached bathrooms, plus the thickness of interior non-structural brick/AAC partition walls. Explicitly excludes external structural walls, common party walls, and balconies.
Loading represents your proportional share of common residential infrastructure: entrance lobbies, lift lobbies, elevator shafts, fire escapes, generator rooms, and shared clubhouse amenities.
The Real Cost per Sq.Ft (Revealing Builder Price Masking)
Developers advertise a lower headline rate per sq.ft on Super Built-Up area. However, because you only inhabit the carpet area, your true acquisition cost per usable square foot is substantially higher:
Builder advertises ₹8,000 / sq.ft on a 1,300 sq.ft Super Built-Up flat. Total base property cost is ₹1,04,00,000 (₹1.04 Cr).
With 30% loading, the true RERA Carpet Area inside your front door is 1,000 sq.ft (76.9% efficiency).
You are paying ₹10,400 per usable sq.ft. That is an extra ₹2,400 / sq.ft (+30%) above the brochure rate.
City-Wise Loading Factor Benchmarks Across Indian Metros
Loading percentages vary significantly across Indian cities depending on municipal development control regulations (DCR) and skyscraper structural designs:
| Metro Market | Typical Loading Range | Average Benchmark | Floor Plate Efficiency | Architectural Factors |
|---|---|---|---|---|
| Mumbai MMR | 35% – 45% | 38% | 68% – 72% | 40+ storey skyscrapers, multiple fire refuge floors, service lift shafts |
| Delhi-NCR (Noida / Gurugram) | 28% – 38% | 32% | 72% – 78% | Expansive multi-level basements, double-height entrance lobbies, large clubhouses |
| Pune | 28% – 35% | 30% | 74% – 78% | Integrated township communities with wide landscaped common corridors |
| Bengaluru | 25% – 32% | 28% | 76% – 80% | Standard IT corridor high-rise complexes with dedicated amenity towers |
| Hyderabad | 22% – 28% | 25% | 78% – 82% | Highest efficiency in India; large floor plates and optimized core circulation |
Real-World Worked Property Scenarios
Compare actual measurements and pricing impacts for typical apartments across Indian property hotspots:
Standard 2 BHK (750 sq.ft RERA Carpet)
Compact 1 BHK (420 sq.ft RERA Carpet)
Carpet Area vs RERA Carpet vs Built-Up vs Super Built-Up Compared
Understanding which physical parts of your home are counted under each measurement standard:
| Space Component | Bare Carpet Area | RERA Carpet (Sec 2(k)) | Built-Up Area | Super Built-Up Area |
|---|---|---|---|---|
| Bedrooms & Living Room Floor | Included | Included | Included | Included |
| Kitchen & Bathrooms Floor | Included | Included | Included | Included |
| Internal Partition Walls | Excluded | Included | Included | Included |
| Balconies & Verandahs | Excluded | Excluded | Included | Included |
| External Perimeter Walls | Excluded | Excluded | Included (50% share) | Included |
| Entrance Lobby & Elevators | Excluded | Excluded | Excluded | Included (Loading) |
| Clubhouse & Corridors | Excluded | Excluded | Excluded | Included (Loading) |
Related Real Estate, RERA & Property Calculators
Ensure complete legal compliance and accurate financial budgeting across your property journey:
Frequently Asked Questions (RERA Carpet Area & Loading)
Expert answers to statutory RERA area definitions, builder quotations, and loading factor calculations.