Cost of building a 5-bedroom duplex + BQ in Onitsha (2026)
Estimated for Onitsha, Anambra (280 m² floor area) using current material prices and local labour rates.
Standard finish
₦103,582,705
Basic ₦84.1M · Luxury ₦162.8M · ₦369,938/m² · without BQ ₦87.4M
Customise this estimate →Cost breakdown
| Element | Share | Cost |
|---|---|---|
| Foundation | 7.6% | ₦7,912,789 |
| Structure | 22.6% | ₦23,426,840 |
| Finishes | 25.9% | ₦26,810,529 |
| Services | 11.7% | ₦12,104,740 |
| External Works | 21.2% | ₦21,994,383 |
| Prelims & Contingency | 10.9% | ₦11,333,424 |
| Total | 100% | ₦103,582,705 |
Materials you'll need
| Material | Approx. quantity | Cost at today's prices |
|---|---|---|
| Cement (50kg bags) | 1,059 bags | ₦13,557,760 |
| Sandcrete blocks (6" & 9") | 8,671 blocks | ₦7,803,531 |
| Iron rods | 5.5 tonnes | ₦4,400,000 |
| Sharp sand | 198 tonnes | ₦2,569,060 |
| Granite | 128 tonnes | ₦2,557,000 |
Construction timeline (9 months)
| Phase | Months | Cost |
|---|---|---|
| Site preparation | 1–1 | ₦1.6M |
| Foundation | 1–2 | ₦7.9M |
| Structure | 2–5 | ₦18.8M |
| Roofing | 5–6 | ₦4.6M |
| Services 1st fix | 5–6 | ₦5.4M |
| Plastering & screeding | 6–7 | ₦5.4M |
| Interior finishes | 7–9 | ₦21.4M |
| Services 2nd fix | 8–9 | ₦6.7M |
| External works | 8–9 | ₦22.0M |
| Snagging & handover | 9–9 | ₦9.7M |
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Frequently asked questions
How much does it cost to build a 5-bedroom duplex + BQ in Onitsha?
About ₦103.6M with standard finishing, ₦84.1M basic and ₦162.8M luxury (2026 prices).
How long does it take to build a 5-bedroom duplex?
About 9 months with steady funding.
How many bags of cement does a 5-bedroom duplex need?
Roughly 1,059 bags of 50kg cement.
Read more: 5-bedroom duplex costs across Nigeria · 12 ways to reduce building cost
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