How do you use the apartment quality score?
- Enter the carpet area and the super built-up area from the agreement or the builder’s price sheet.
- Rate the five checks from your own visit: Good, OK, Poor, or Not seen if you have not checked yet.
- Open “Your efficiency benchmark” to change the carpet-to-super-built-up share you are aiming for (75% to start).
The 1,100 and 1,500 sq ft filled in are an example. Replace them with the figures for your flat.
What is carpet area efficiency?
Carpet area is the floor inside your walls that you can use. Super built-up area adds walls, balconies and a share of corridors, lifts, lobbies and amenities. The share of super built-up area that is carpet tells you how much of what you pay for you actually live in. Loading is the same idea the other way round: how much extra area is added on top of the carpet area.
Formulas used by the calculator
Carpet area ÷ super built-up area × 100(Super built-up ÷ carpet − 1) × 100min(1, efficiency ÷ your benchmark) × weight 3Points earned ÷ 12 × 100; any Poor or a score below 50 = Weak, 80 and above = StrongWorked example: a good flat with two OK items
1,100 sq ft carpet on 1,500 sq ft super built-up is 73.3% efficient (36% loading), which earns 98 of 100 against a 75% benchmark. Light and air, layout and finishing are good; water and noise are OK. The score is 87 out of 100, rated Strong.
Worked example: poor water supply
900 sq ft carpet on 1,400 sq ft is 64.3% efficient. Light and noise are good, layout and finishing OK, but water supply is poor. The score is 67 out of 100 and the rating is Weak, because a poor answer on any check needs a second look.
How does efficiency change with loading?
| Carpet / super built-up | Efficiency | Loading | Points of 100 |
|---|---|---|---|
| 1,000 / 1,250 sq ft | 80.0% | 25% | 100 |
| 1,100 / 1,500 sq ft | 73.3% | 36% | 98 |
| 900 / 1,350 sq ft | 66.7% | 50% | 89 |
| 800 / 1,300 sq ft | 61.5% | 62% | 82 |
How should you check each item on a visit?
- Light and air: visit in the day, open the windows, and see whether air can pass from one side of the flat to the other.
- Water supply: ask the society or builder where the water comes from and whether residents buy tanker water.
- Layout: measure the main rooms and check where your furniture would go; long passages waste carpet area.
- Noise: listen with the windows shut and open, at a busy time of day.
- Finishing: look at walls, tiles, doors, windows and taps for gaps, damp and uneven work.
What does this tool leave out?
- Title, approvals and the builder’s record. See the property risk assessment and builder trust score.
- Price per sq ft of carpet area; divide the price by the carpet area to compare flats.
- Structural soundness, which needs an engineer.
Frequently asked questions
Related answers and guides
- ORR Noise and Air Quality: Check Before Buying a Flat
- Carpet Area vs Super Built-Up Area Under RERA
- BDA Approved Plots Checklist: Bengaluru Layout Checks 2026
- Final Checks Before Taking Possession: 25-Point List
Sources
- Areas: the agreement or the builder’s price sheet.
- Scores, weights and benchmark: the rules on this page and your answers.
This is a checklist score from your own answers, not an inspection or a valuation. Please consult a property lawyer on area definitions, and your Chartered Accountant (CA) for any tax question.
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