Construction cost from built up area and a rate a square foot, with the finish level, contingency and approval fees separated. Roughly half of a house is structure and half is finishing, and it is the finishing half that varies by a factor of three between basic and luxury.
Also called: house construction cost, cost per square foot calculator.
₹37,26,000 for 1,800 square feet at ₹1,800 a foot after the standard finish adjustment. About 1684800 is structure and 1555200 is finishing, across 2 floors. The structure is predictable; the finishing half is what differs by around three times between a basic and a luxury specification, which is why two quotes at very different rates are often for very different houses. Contingency of 324000 and fees of 162000 sit on top of the 3240000 build, not inside it. Ten percent contingency is the working minimum, because no site survives contact with the ground plan intact. Spread over 14 months the outflow averages 266142.86 a month. Rates vary by city, season and contractor. Treat the figure as a budget with a stated contingency, not a quotation.
| Stage | Share | Amount |
|---|---|---|
| Foundation and plinth | 14% | ₹4,53,600 |
| Structure and slabs | 28% | ₹9,07,200 |
| Masonry and plaster | 10% | ₹3,24,000 |
| Electrical and plumbing | 12% | ₹3,88,800 |
| Flooring and tiling | 13% | ₹4,21,200 |
| Doors, windows and joinery | 11% | ₹3,56,400 |
| Painting and finishing | 12% | ₹3,88,800 |
A rate per square foot is the way the trade quotes and it hides an important split: the structure, foundation, frame, slab and walls, is fairly predictable, while finishing, flooring, fittings, joinery and paint, is where the range lives. A basic finish and a luxury one differ by around three times on the same structure. Contingency is not padding, it is the acknowledgement that no site survives contact with the ground plan intact, and ten percent is the minimum any builder would recommend. Approvals, plan sanctions and statutory fees are added separately because they scale differently and are often left out of a per-foot quote entirely.
area times rate, adjusted for finish level, with contingency and statutory fees added on top rather than absorbedEach of these is asserted on every build. If a change to the engine ever moved one of these answers, the build would fail before the page could print it.
Construction cost₹37,26,000
1800 x 1800, plus 15% of contingency and fees
Open this exampleConstruction cost₹70,79,400
boundary: the same structure, nearly double the cost, from the finishing half
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