Loading Factor
The ratio by which super built-up area exceeds carpet area, expressed as a percentage. A loading factor of 30% means you pay for 1.30 sqft per 1 sqft of usable space.
What is the Loading Factor?
The loading factor (also called the load factor or common area loading) is the percentage by which a builder inflates carpet area to arrive at super built-up (saleable) area. Mathematically:
Loading Factor = (Super Built-Up Area − Carpet Area) ÷ Carpet Area × 100
If your apartment has a carpet area of 800 sqft and a super built-up area of 1,040 sqft, the loading factor is 30%. You are effectively paying for 240 sqft of common areas you share with all other residents.
Why It Matters for Buyers
In pre-RERA transactions, the loading factor was the primary lever builders used to obscure real value. A project with a 40% loading factor and an asking price of ₹6,000/sqft (super built-up) actually costs ₹8,400/sqft on carpet area — equivalent to a project priced at ₹8,400/sqft on carpet area. Without understanding loading, buyers cannot make apples-to-apples comparisons.
Even post-RERA, loading factor remains important for:
- Comparing resale properties quoted in super built-up area against new projects
- Evaluating society maintenance charges (levied on super built-up in many societies)
- Understanding what proportion of your floor area is truly private vs. shared
Typical Loading Factors by Building Type
| Building Type | Typical Loading Factor |
|---|---|
| Budget apartments (up to ₹50L) | 20–25% |
| Mid-range high-rise | 25–35% |
| Premium high-rise (35+ floors) | 30–40% |
| Luxury with large lobbies/amenities | 35–48% |
| Low-rise/villa-style apartments | 15–22% |
How to Verify Loading Factor
RERA-registered projects must disclose both carpet area and the undivided share of land/common areas. From these disclosures you can calculate the implied loading factor. Cross-check the RERA filing against the builder's brochure — if the brochure implies a lower loading (to make the per-sqft price appear smaller), that is a red flag.
Formula check: Take any unit's carpet area from RERA Form A. Divide the builder's quoted super built-up area by the carpet area. The result minus 1, expressed as a percentage, is the loading factor.
How Brickplot Uses This
Brickplot calculates and publishes the loading factor for every project where RERA data is available. Projects with loading factors above 40% are flagged in the Value for Money axis and buyers see an explicit warning. In our price-per-sqft comparisons, we always show the carpet-area price alongside the super-built-up price to make the loading effect transparent.
Related Terms
- Carpet Area — the denominator of loading factor
- Super Built-Up Area — the numerator of loading factor
- Built-Up Area — the intermediate measurement between carpet and super built-up
Related terms
Brickplot verifies loading factor disclosures on every reviewed project as part of the independent 11-axis score. No builder commissions. No editorial override.