Ask five contractors what it costs to build a house and you will get five different per-square-foot rates. The rate alone tells you very little. What matters is where the money goes. Once you know the typical breakdown, you can compare quotes properly, plan cash flow and spot where a contractor is cutting corners.
The typical cost breakdown
For a standard RCC-framed house with ordinary good-quality finishes, the share of each stage usually falls in these ranges:
| Stage | Typical share of total cost |
|---|---|
| Excavation, foundation and plinth | 10 to 14% |
| RCC frame: columns, beams, slabs, staircase | 25 to 30% |
| Brick or block masonry | 8 to 12% |
| Plastering | 5 to 7% |
| Flooring and wall tiling | 8 to 12% |
| Doors, windows and grills | 8 to 10% |
| Electrical work | 5 to 7% |
| Plumbing and sanitary fittings | 6 to 9% |
| Painting and waterproofing | 5 to 7% |
| Contingency and site expenses | 5% |
Material versus labour
Materials usually account for about 60 to 65% of the cost and labour for 35 to 40%. Cement, steel, sand, aggregate and bricks alone make up a large part of the material bill. That is why a jump in steel or cement prices moves the total so much.
Three ways to price a house
- Labour-only contract. You buy materials and the contractor supplies labour. Cheapest on paper, but you carry the risk of wastage and supervision.
- Material-and-labour contract. One rate per square foot covers everything specified. Easiest to manage, but only as good as the specification list attached to it.
- Item-rate contract. Each item is priced by quantity (per m³ of concrete, per m² of plaster). Most transparent and easiest to verify.
What makes the per-square-foot rate go up
- Poor soil that needs deeper or raft foundations.
- Many corners, cantilevers and projections instead of a simple rectangle.
- Premium tiles, fittings, modular kitchens and wardrobes. These can add more than the entire structure.
- Small built-up areas, since fixed costs are spread over fewer square feet.
- Location. Material transport and labour rates vary widely between cities and villages.
How to use this breakdown
When a contractor gives you a lump-sum rate, ask them to split it into these stages. If the RCC share looks too low, check the concrete grade and steel quantity. If finishing looks unusually cheap, ask for the tile, fitting and paint brands in writing. Pay in stages linked to completed work, not to dates.
Estimate your own material quantities with the concrete, brick and steel calculators.
Frequently asked questions
Why do quotes for the same house differ so much?
Usually because the specifications differ. One quote may assume M20 concrete and branded fittings, another M15 and local fittings. Compare line by line, not total by total.
How much contingency should I keep?
At least 5%, and closer to 10% if you are likely to change the design during construction.
Does a basement or second floor cost the same per square foot?
No. Basements cost much more because of excavation, retaining walls and waterproofing. An extra floor on an existing structure can cost less per square foot because the foundation is already paid for, provided it was designed for it.