When two flats in Mulund or Vikhroli are quoted at the "same" rate, buyers often discover later that one number was carpet area and the other was built-up or super built-up. That confusion is expensive. This guide explains what RERA actually defines, how market terms differ, and how to compare quotes fairly before you book.
Under Section 2(k) of the Real Estate (Regulation and Development) Act, 2016 (also listed on India Code), carpet area means the net usable floor area of an apartment. It excludes the area covered by the external walls, areas under service shafts, exclusive balcony or verandah area and exclusive open terrace area. It includes the area covered by the internal partition walls of the apartment.
In plain English: carpet area is the floor you can actually use inside the flat, including the thickness of internal walls between rooms, but not the outer walls, shafts, or a private balcony/terrace. Promoters must disclose carpet area on the MahaRERA portal and in the agreement for sale.
Built-up area and super built-up area are market terms. They are not defined in the RERA Act. Brochures may add outer walls, balconies, or a share of common areas (lobby, staircase, amenity load) into a larger figure. That can make a flat look cheaper per square foot when you are really paying for space you cannot furnish as a bedroom.
Older habit and marketing convenience. For legal protection and apples-to-apples shopping, ignore the brochure rate until you have converted everything to RERA carpet area (or asked the seller to do so in writing).
Use one formula for every option you shortlist:
Illustrative maths only (not a market survey): Flat A and Flat B are both offered at Rs 1.20 crore all-in. Flat A has 650 sq ft carpet; Flat B has 580 sq ft carpet. Effective rates are about Rs 18,460 / sq ft versus Rs 20,690 / sq ft. Same headline price; very different value once carpet is used.
Also plan for closing costs — our Maharashtra stamp duty and registration guide and the official IGR Maharashtra portal help you budget that side of the deal. If you are financing, read how rate moves affect EMI in our repo rate and home loan EMI note.
MahaRERA publishes a practical checklist for buyers at maharera.maharashtra.gov.in/buying-property. Key points that relate to area:
If figures do not match, pause the booking and get a written correction before you pay further amounts.
Agreements for sale and MahaRERA model agreement practices may allow a limited variation between sanctioned/agreed carpet area and the area measured at possession. Do not assume a percentage from hearsay. Read your own agreement, check the MahaRERA portal figures for your unit, and if there is a shortfall beyond what your contract allows, seek the contractual remedies stated in that agreement (adjustment of consideration, or other remedies as drafted). Secondary guides sometimes summarise a roughly 3% tolerance from MahaRERA model agreement language — treat that as a pointer to verify in your documents, not as a substitute for them.
These eastern suburbs attract both first-time buyers and upgraders looking at 1 and 2 BHKs. Inventory mixes resale societies and new MahaRERA-registered projects, so area bases in quotes can differ wildly. For local context on demand, see why Mulund and Vikhroli remain strong 2026 bets, then browse current listings on our properties page.
One transparent example on our books is OM GN Willows at Kannamwar Nagar-1, Vikhroli East (MahaRERA P51800077593), with 1 and 2 BHK homes from Rs 78.50 lakh all-inclusive. When a project leads with an all-inclusive price and RERA carpet figures, EMI planning and rate comparison become much simpler.
Gita Real Estate is a MahaRERA-registered broker (A51800006506) based in Mulund West. We help with buy, sell and rent, plus stamp duty and registration. Before you book, we can walk you through portal carpet figures, draft agreement checks and a fair rate-per-carpet comparison across options. Call or WhatsApp +91 90821 79935 or +91 93239 85063, or use our contact page.
Under Section 2(k) of the Real Estate (Regulation and Development) Act, 2016, carpet area is the net usable floor area of an apartment, excluding the area covered by external walls, areas under service shafts, exclusive balcony or verandah area and exclusive open terrace area, but including the area covered by the internal partition walls of the apartment.
No. Built-up and super built-up are market terms used in brochures and conversations. They are not defined in the RERA Act. For fair comparison and legal agreements, always use carpet area as shown on the MahaRERA portal and in your agreement for sale.
Divide the all-in price by the RERA carpet area of each flat, then compare that rate per square foot. Also confirm what is included in the all-in cost — parking, club membership, GST if applicable, and other charges — so you are not matching unequal quotes.
Yes. As a MahaRERA-registered agent (A51800006506), we help Mulund and Vikhroli buyers check carpet area on the MahaRERA portal against the agreement, compare options, and handle stamp duty and registration from our Mulund West office.
Ready to compare Mulund or Vikhroli flats on true carpet area? Call or WhatsApp us on +91 90821 79935 or +91 93239 85063, visit gitarealestate.com, or send us a message. We will help you read the numbers clearly, without pressure.
