About the RERA Carpet Area Compliance Calculator
What is the RERA Carpet Area Compliance Calculator?
At possession, it is worth measuring your flat. If the carpet area is smaller than promised, you have paid for space you did not get.
Enter the carpet area in the agreement, the measured area, the rate per sq ft of carpet and the variation your agreement allows. Many state model agreements under RERA allow up to 3%, with a refund for any shortfall beyond it.
How to use the RERA Carpet Area Compliance Calculator
- Carpet Area Stated in the Agreement (sq ft) (sample: 1,000)
- Carpet Area Measured on Possession (sq ft) (sample: 965)
- Price per Sq Ft of Carpet Area (₹) (sample: 10,000)
- Variation Allowed in Your Agreement (%) (sample: 3)
- Press Check Carpet Area Compliance (results also refresh as you type). The result card shows the Carpet Area Difference, along with Shortfall / excess, Value of the shortfall, Within the agreed variation? and What counts as carpet area.
Formula used
Difference % = (Measured − Agreed) ÷ Agreed × 100; Refund due ≈ Shortfall × Carpet-area rate
- Carpet area = net usable floor area within the walls, excluding exclusive balconies, terraces and service shafts
Measure inside the walls, room by room, and include internal partition walls as RERA does.
Worked example
These are the sample values already filled in the calculator above, and the result it returns for them:
| Input | Sample value |
|---|---|
| Carpet Area Stated in the Agreement (sq ft) | 1,000 |
| Carpet Area Measured on Possession (sq ft) | 965 |
| Price per Sq Ft of Carpet Area (₹) | 10,000 |
| Variation Allowed in Your Agreement (%) | 3 |
| Result | Value |
|---|---|
| Carpet Area Difference | -3.5% |
| Shortfall / excess | -35 sq ft |
| Value of the shortfall | ₹3,50,000 |
| Within the agreed variation? | No – raise it with the builder or the state RERA authority |
| What counts as carpet area | Net usable floor area within the walls, excluding external walls, service shafts, exclusive balconies and terraces |
Tips for using the RERA Carpet Area Compliance Calculator
- Hire an independent surveyor if the difference looks significant.
- Raise a written complaint with the builder first; if unresolved, file with the state RERA authority.