Cost of building a 6-bedroom duplex + BQ in Onitsha (2026)
Estimated for Onitsha, Anambra (322 m² floor area) using current material prices and local labour rates.
Standard finish
₦112,413,771
Basic ₦90.8M · Luxury ₦176.9M · ₦349,111/m² · without BQ ₦96.2M
Customise this estimate →Cost breakdown
| Element | Share | Cost |
|---|---|---|
| Foundation | 7.8% | ₦8,775,614 |
| Structure | 23.3% | ₦26,155,091 |
| Finishes | 26.4% | ₦29,707,712 |
| Services | 12.0% | ₦13,492,456 |
| External Works | 19.6% | ₦21,994,383 |
| Prelims & Contingency | 10.9% | ₦12,288,515 |
| Total | 100% | ₦112,413,771 |
Materials you'll need
| Material | Approx. quantity | Cost at today's prices |
|---|---|---|
| Cement (50kg bags) | 1,164 bags | ₦14,903,808 |
| Sandcrete blocks (6" & 9") | 9,095 blocks | ₦8,185,284 |
| Iron rods | 6.2 tonnes | ₦4,976,000 |
| Sharp sand | 214 tonnes | ₦2,782,780 |
| Granite | 141 tonnes | ₦2,817,000 |
Construction timeline (9 months)
| Phase | Months | Cost |
|---|---|---|
| Site preparation | 1–1 | ₦1.8M |
| Foundation | 1–2 | ₦8.8M |
| Structure | 2–5 | ₦20.9M |
| Roofing | 5–6 | ₦5.3M |
| Services 1st fix | 5–6 | ₦6.1M |
| Plastering & screeding | 6–7 | ₦5.9M |
| Interior finishes | 7–9 | ₦23.8M |
| Services 2nd fix | 8–9 | ₦7.4M |
| External works | 8–9 | ₦22.0M |
| Snagging & handover | 9–9 | ₦10.5M |
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Frequently asked questions
How much does it cost to build a 6-bedroom duplex + BQ in Onitsha?
About ₦112.4M with standard finishing, ₦90.8M basic and ₦176.9M luxury (2026 prices).
How long does it take to build a 6-bedroom duplex?
About 9 months with steady funding.
How many bags of cement does a 6-bedroom duplex need?
Roughly 1,164 bags of 50kg cement.
Read more: 6-bedroom duplex costs across Nigeria · 12 ways to reduce building cost
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