Understanding RERA Carpet Area: Why It's Smaller Than You'd Expect

Last updated: Sept 2026

Before RERA, developers could market a unit using whichever area figure looked most favourable. RERA carpet area fixed this by legally defining exactly what "area" means for pricing purposes.

• Legal definition: net usable floor area within the unit's walls, per Section 2(k), RERA Act, 2016
• Excludes: balcony area, common areas (lobby, stairwell, lift), and the wall's own thickness
• Typically 25 to 30% smaller than the super built-up figure previously used in marketing
• Mandatory pricing basis: RERA-registered projects must quote price per carpet area, not super built-up area

• Verification: the sale agreement must state carpet area explicitly, matching the RERA-registered project details

  
  

Confirm the RERA carpet area figure specifically, not the super built-up figure, before comparing price per square foot across different projects.

This is the most common source of buyer frustration, and it traces directly to how developers marketed area before RERA standardised the term. A super built-up figure, still used informally in some conversations, includes shared spaces the carpet area figure deliberately excludes.

Three specific exclusions account for most of the gap between what buyers expect and what carpet area actually shows. The realistic gap between the two figures comes from:

• Common area allocation, such as a share of the building's lobby, stairwell, and lift area, included in super built-up but excluded from carpet area
• Wall thickness, which occupies real floor space but isn't usable living area, excluded from carpet area specifically

• Balcony space, treated separately in some regional practices and excluded from the core carpet area figure

  
  

Understanding that the gap comes from genuine exclusions, not developer error, reframes carpet area as more accurate, not smaller in a misleading sense.

A unit marketed at 1,000 sq. ft. super built-up translates to roughly 700 to 750 sq. ft. of actual carpet area, as a rule, which is why comparing price per square foot only makes sense when both figures being compared use the same basis.

Four checks confirm a quoted figure matches what RERA actually requires.

1. Check the project's RERA registration details on the state RERA portal, which lists the registered carpet area for each unit type.
2. Compare this registered figure against what your sale agreement states, confirming the two match exactly.
3. Where a broker quotes a different, larger figure informally, ask specifically whether they mean carpet area or super built-up area.

4. For an under-construction project, request the RERA-registered floor plan showing the carpet area breakdown by room.

   
   

Relying on a verbally quoted figure without checking the RERA-registered document is the most common way a buyer discovers a mismatch only after signing.

Consider Rohan, a 32-year-old engineer with a household income of Rs. 1.1 lakh a month and a CIBIL Score of 744, comparing two units both marketed at "1,000 sq. ft."

Once Rohan recalculated both on a true carpet-area basis, Project B offered meaningfully more usable space for a lower effective price per square foot, a comparison the marketed figures alone had obscured.

Bajaj Finance verifies a project's RERA-registered carpet area as part of standard legal due diligence before disbursing a home loan. Approval timelines can extend where a stated carpet area doesn't match RERA records, and minimum property value thresholds can differ by city. Check your home loan eligibility once your unit's carpet area is confirmed.