Cost of Building a Duplex in Nigeria

Blog post description.

Architect Elisha Okunwaye

7/1/20262 min read

As of mid-2026, building a standard 4-5 bedroom duplex in Nigeria (excluding land) typically costs ₦60 million to ₦150 million+, with many realistic mid-range estimates falling between ₦70M–₦120M.

Costs vary significantly based on location (Lagos/Abuja are highest), design complexity, quality of finishes, soil type, and material/labor fluctuations. Luxury or prime urban builds easily exceed ₦150M–₦200M.

### Key Cost Ranges (2026 Estimates, Excluding Land)

- Standard/Mid-range 4-bedroom duplex: ₦60M–₦100M (basic to good finishes).

- Luxury or 5-bedroom: ₦100M–₦200M+ (premium materials, smart features, etc.).

- Lower-end (simpler designs, outside major cities): ₦35M–₦70M (possible but often involves compromises).

- Per square meter: ₦250,000–₦450,000+ (standard ₦280k–₦400k; luxury higher). A typical 4-bed duplex might span 250–400+ sqm.

Note: These are full build costs (foundation to finishing). Older 2024–early 2025 figures are outdated due to inflation in materials.

### Major Cost Drivers and Breakdown

Construction costs break down roughly as:

- Foundation/Substructure (to DPC): ₦8M–₦17M+ (higher on poor/waterlogged soil requiring piling).

- Superstructure (blockwork, decking for upper floors): Significant portion; decking alone can add millions.

- Roofing: ₦3M–₦16M (aluminum sheets, trusses, etc.).

- Finishing (plastering, tiling, painting, POP, windows/doors, electrical/plumbing): Often 35–45% of total, easily ₦30M–₦60M+.

- Other: Borehole, fencing, landscaping, approvals (add 10–20%).

Materials dominate (often 60%+ of costs):

- Cement: ₦8,500–₦12,500 per 50kg bag (Dangote/BUA common; hundreds of bags needed).

- Steel/rebar, blocks, sand, granite, roofing sheets, tiles, fixtures — all volatile with forex and fuel prices.

Labor, professional fees (architect, structural engineer, QS), and site overheads add more.

### Factors Affecting Cost

- Location: Lagos/Abuja prime areas highest (logistics, demand); smaller cities or outskirts cheaper.

- Design & Size: Complex features (balconies, cantilevers, multiple floors) increase structural costs. Duplexes cost more than bungalows due to upper-floor work and staircases (30–60% premium in some cases).

- Soil/Foundation: Waterlogged sites need expensive piling.

- Finishes: Basic vs. imported tiles, POP ceilings, smart fittings, kitchen/wardrobes.

- Inflation & Economy: Material prices (esp. cement, steel) rise with naira fluctuations and fuel costs. Always add 10–20% contingency.

- Contractor & Management: Good supervision saves money; poor planning leads to overruns.

### Cost-Saving Tips

- Use local materials where possible.

- Phase the build (e.g., complete ground floor first).

- Get multiple quotes and hire a competent Quantity Surveyor for accurate Bill of Quantities.

- Opt for simpler designs and standard finishes.

- Buy materials in bulk during price dips.

Recommendations: Costs change rapidly, so consult local architects, builders, or Quantity Surveyors for site-specific quotes. Get soil tests and proper approvals early. For a personalized breakdown, provide details like location, size, and desired finishes.

This is a general guide based on recent market reports, videos, and discussions. Actual costs depend on your specifics—always verify with professionals on the ground.