Carpet Area
Carpet area is the net usable floor area within the walls of an apartment or property unit — the area over which a carpet could literally be laid — and is the legally mandated standard for property area disclosure under RERA since 2016.
Before RERA standardised property area disclosures, Indian real estate developers sold properties using a variety of area metrics, including super built-up area, built-up area, saleable area, and loading-adjusted area — each calculated differently and each allowing developers to maximise the per-square-foot price basis while obscuring the actual usable space being sold. Homebuyers often discovered, after paying for 1,200 sq ft of super built-up area, that the actual usable interior space was only 750–800 sq ft.
RERA defined carpet area precisely under Section 2(k) of the Act as the net usable floor area of an apartment, excluding the area covered by external walls, areas under services shafts, exclusive balcony or verandah area, and exclusive open terrace area. This definition included the floor area within the apartment's internal walls (including utility ducts and internal structural columns) but excluded the thickness of external walls, common areas, and shared infrastructure.
The RERA mandate was clear: all developers were required to quote prices per square foot of carpet area and disclose the carpet area of each unit in their registered project. This was a seismic shift from the industry practice of quoting prices on super built-up area, which typically ranged from 30 to 50 percent more than the carpet area. A developer quoting Rs 10,000 per sq ft on super built-up area with a 40 percent loading factor was effectively charging Rs 14,000 per sq ft of carpet area. RERA forced this transparency, enabling genuine price comparisons across developers and projects.
The loading factor — the ratio of super built-up area to carpet area — varied considerably across project types and decades of construction. High-rise luxury towers with elaborate lobbies, multiple lifts, swimming pools, clubhouses, and common corridors had high loading factors (sometimes 50–60 percent), meaning the buyer paid for a large amount of non-exclusive area. Plotted developments and smaller societies had much lower loading factors.
From a homebuyer's practical standpoint, understanding carpet area was essential for determining whether a unit would meet actual furniture placement needs, vastu requirements, and family living space requirements. Property portals and brokers, even post-RERA, sometimes continued to display super built-up area prominently alongside carpet area, requiring buyers to verify the carpet area figure from the official MahaRERA or state RERA project registration page before making any booking payment.