Bangalore RERA Carpet Area Calculation Rights Guide

What Legal Rights Does a Bangalore Allottee Have When the Developer Changed the Carpet Area Calculation Method After the RERA Amendment Notification?

By the Property Law Team | Legal Brigade | Bar Council of Karnataka

When a Bangalore RERA-registered developer registered the project using the pre-amendment carpet area definition – which may have included certain areas like wall thicknesses differently – and then after the RERA carpet area definition was clarified through the RERA Amendment or the model agreement notification, the developer recalculated the flat’s carpet area using the new methodology and informed the allottees that their flat’s carpet area was different from what was stated in the original RERA registration and the sale agreement, the allottee faces a situation where the carpet area that was promised and that the allottee paid for may be materially different from the carpet area the developer now claims to deliver.

What Is the RERA Carpet Area Definition and Why Does the Calculation Method Matter?

RERA Section 2(k) defines “carpet area” 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. The carpet area specifically includes the area covered by the internal partition walls of the apartment. This definition is the mandatory definition that all RERA-registered projects must use for stating the flat’s carpet area.

Before RERA, developers used various area measurement methods – super built-up area (which includes a share of common areas), built-up area (which includes the thickness of external walls) and carpet area (which varied in definition between developers). When RERA mandated carpet area as the only permitted measurement, some developers registered their projects using their own interpretation of carpet area – which may have been slightly different from RERA’s precise definition. The RERA Amendment and subsequent clarifications resolved some definitional ambiguities but also created situations where the developer’s registered carpet area and the RERA-compliant carpet area differed.

How Should the Allottee Respond to a Carpet Area Change Notification?

Step 1: Request the developer to provide the detailed carpet area calculation under the RERA definition – showing the specific areas included and excluded and the resulting net carpet area.

Step 2: Compare the notified carpet area with the carpet area stated in the sale agreement and the RERA registration – identifying the specific difference in square feet.

Step 3: If the carpet area is less than the registered amount, calculate the compensation: the difference in sq ft x the rate per sq ft in the sale agreement = the refund amount for the shortfall.

Step 4: Send a formal notice to the developer demanding the shortfall refund (if the area reduced) or an explanation of the calculation change (if the area changed without a corresponding price adjustment).

Step 5: File a K-RERA complaint if the developer does not resolve the carpet area discrepancy – attaching the registered RERA carpet area, the revised carpet area and the compensation calculation.

Q1. What is RERA’s definition of carpet area and what does it include?

RERA Section 2(k) defines carpet area as the net usable floor area of an apartment, including the area covered by internal partition walls. It excludes the area covered by external walls, areas under services shafts, exclusive balcony or verandah area and exclusive open terrace area. This definition specifically includes the internal wall area – which is a RERA-specific inclusion that differs from some pre-RERA carpet area definitions.

Q2. Why did some developers register their RERA carpet areas using a different calculation method?

RERA was a new law when it came into force – some developers registered their projects in the early RERA period using their own interpretation of the carpet area definition rather than RERA’s precise definition. Some developers excluded internal wall areas (which RERA includes) – resulting in a lower registered carpet area than the RERA-compliant figure. Others may have included areas that RERA excludes – resulting in a higher registered area. The RERA Amendment and K-RERA guidance clarified the correct method over time.

Q3. Can the developer charge extra for a carpet area increase due to the recalculation?

If the recalculation shows the carpet area is larger than what was stated in the sale agreement, the developer cannot charge additional consideration for the extra area – the sale agreement price is for the flat as a whole and the allottee does not pay extra for a correction that is the developer’s administrative error. If the developer tries to charge extra, the allottee should reject the demand and file a K-RERA complaint.

Q4. What is the K-RERA remedy for a carpet area shortfall?

K-RERA’s remedy for a carpet area shortfall is the proportional refund of the purchase price for the undelivered carpet area – calculated as (shortfall sq ft / total registered sq ft) x total consideration paid. The refund carries interest at the MCLR plus 2% rate from the date of payment. K-RERA adjudicating officers regularly award carpet area shortfall compensation in cases where the delivered carpet area is less than the registered area.

Q5. Does the carpet area certificate issued at possession match the RERA registration?

RERA requires the developer to give the allottee a carpet area certificate at the time of possession – confirming the flat’s actual carpet area as measured in the delivered flat. The allottee should compare this certificate against the RERA registration’s stated carpet area. If the certificate shows a different area, the allottee should not sign the possession letter without noting the discrepancy and filing a K-RERA complaint.

Q6. What if the carpet area changed because the building plan was amended?

A carpet area change that resulted from a legitimate BBMP building plan amendment – approved with K-RERA’s awareness and the allottees’ prior consent – is a disclosed and consented change. A carpet area change that was made without prior consent or disclosure is a RERA Section 14(1) structural change violation even if the change is framed as a carpet area calculation correction.

Q7. Does the carpet area affect the GST paid on the flat?

GST on an under-construction flat is calculated on the sale consideration – not on the carpet area. A carpet area change does not directly change the GST amount (unless the sale agreement is amended to reflect a different consideration for the changed area). The proportional refund for a carpet area shortfall under RERA would be net of the GST already paid on the refunded portion.

Q8. Is the carpet area printed on the RERA registration certificate the definitive figure?

The carpet area in the K-RERA registration is the developer’s committed figure – the carpet area the developer undertook to deliver. If the actual delivered carpet area differs from this committed figure, the developer owes a K-RERA remedy for the difference. The registered figure is the contractual commitment; the actual measurement at possession is the delivery; the difference is the deviation.

Q9. Can the allottee commission an independent measurement of the carpet area?

Yes – the allottee can commission a licensed architect or surveyor to independently measure the flat’s carpet area at possession using the RERA definition. The independent measurement provides evidence for the K-RERA complaint if the developer’s carpet area certificate shows a different (lower) figure. The independent measurement cost is recoverable from the developer as part of the K-RERA compensation.

Q10. How does Legal Brigade assist allottees with carpet area discrepancy claims?

Legal Brigade compares the RERA registered carpet area against the developer’s revised figure, calculates the shortfall compensation at the contracted rate per sq ft, commissions an independent measurement if needed and files the K-RERA Section 12 complaint for the carpet area discrepancy. Legal Brigade also advises on whether the carpet area change constitutes a structural design change under Section 14(1) – which may entitle the allottee to a broader compensation beyond just the area shortfall.

Your Bangalore developer notified you that your flat’s carpet area is less than what was in the RERA registration and your sale agreement? Legal Brigade calculates the carpet area shortfall compensation and files the K-RERA claim.

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