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40×60 House & Duplex Construction Cost in Bengaluru — 2026
Budgets for the 2,400 sq ft site: duplex and multi-unit configurations, 2026 rates, and the rental-income math that makes 40×60 builds different from 30×40.
A 40×60 site (2,400 sq ft) changes the question from "what can I fit" to "what do I want the building to do". Owner-duplex, duplex-plus-rental, or full rental floors — each configuration has its own budget shape. The rates match the 30×40 guide; the areas and decisions differ.
Configurations and budgets
| Configuration | Built-up area | Indicative cost (standard–premium) |
|---|---|---|
| Ground-floor house | ~1,800 – 2,000 sq ft | ₹36 – ₹58 lakh |
| G+1 owner duplex | ~3,600 – 4,000 sq ft | ₹72 lakh – ₹1.15 crore |
| G+2: duplex + rental floor | ~5,400 – 6,000 sq ft | ₹1.05 – ₹1.7 crore |
| G+3 rental building | ~7,000 – 7,800 sq ft | ₹1.4 – ₹2.2 crore |
The rental floor decision
The marginal cost of a rental floor on a 40×60 build is mostly structure and finishing — the land, foundation and approvals are already paid for. At Bengaluru rents, a well-located 2BHK floor typically returns its construction cost in 8–12 years, before appreciation. That is why most 40×60 owners build at least one floor more than they plan to occupy. Design it in from the start: retrofitting a separate entrance and meter later costs multiples.
What changes vs a 30×40 build
- Structural design matters more — longer spans, more configurations worth an engineer's time.
- Separate metering, water and entrances for units should be in the first drawing.
- Lift provision (even just the shaft) is worth considering at G+2 and above.
- Phasing is possible: build G+1 now with columns designed for G+3 later.