Building a 5-bedroom duplex in Nigeria is a significant investment, requiring meticulous planning and budget estimates. This guide provides a detailed breakdown of the costs involved, from the foundation to finishing, based on estimated prices in 2025. Keep in mind that actual costs may vary depending on location, design, and fluctuations in material and labor prices.

Key Features of the 5-Bedroom Duplex

Ground Floor: Includes an entrance porch, anteroom/stair foyer, main lounge, dining area, kitchen, utility space, and two ensuite bedrooms.
First Floor: Features three ensuite bedrooms, a family lounge, terraces, storage spaces, lobbies, and a staircase area.
Total Floor Area: Approximately 272 square meters.

1. Foundation to DPC (Damp Proof Course)

Materials Required:

Foundation Concrete:
- Cement: 80 bags at ₦7,800 each = ₦624,000
- Sharp Sand: 10 tons (3 trips) at ₦50,000 per trip = ₦150,000
- Granite/Chippings: 20 tons at ₦34,000 per ton = ₦680,000
- Total: ₦1,454,000
Foundation Block Work:
- 9-inch Blocks: 2,200 pieces at ₦500 each = ₦1,100,000
- Cement: 30 bags at ₦7,800 each = ₦234,000
- Sharp Sand: 3 trips at ₦50,000 per trip = ₦150,000
- Total: ₦1,484,000
Earth Filling:
- Laterite: 50 trips at ₦40,000 per trip = ₦2,000,000
Reinforcement Work:
- 12mm Rods: 40 lengths at ₦9,000 each = ₦360,000
- 16mm Rods: 35 lengths at ₦14,800 each = ₦518,000
- 10mm Rods: 40 lengths at ₦8,500 each = ₦340,000
- 8mm Rods: 35 lengths at ₦3,300 each = ₦115,500
- Binding Wire: 20kg at ₦3,700 per kg = ₦74,000
- Total: ₦1,407,500
Concrete Floor Slab (DPC):
- Cement: 150 bags at ₦7,800 each = ₦1,170,000
- Sharp Sand: 4 trips at ₦50,000 per trip = ₦200,000
- Granite: 20 tons at ₦34,000 per ton = ₦680,000
- Total: ₦2,050,000
Carpentry Work:
- 1×12 Wood: 100 pieces at ₦2,600 each = ₦260,000
- Nails: 1 bag at ₦32,000 = ₦32,000
- Total: ₦292,000

Subtotal (Foundation to DPC):

Material Cost: ₦8,398,700
Labor Cost: ₦1,500,000
Total: ₦9,898,700

2. Ground Floor to Deck Level

Materials Required:

Block Work:
- 9-inch Blocks: 3,000 pieces at ₦500 each = ₦1,500,000
- Cement: 50 bags at ₦7,800 each = ₦390,000
- Sharp Sand: 5 trips at ₦50,000 per trip = ₦250,000
- Total: ₦2,140,000
Concrete Work:
- Cement: 80 bags at ₦7,800 each = ₦624,000
- Sharp Sand: 3 trips at ₦50,000 per trip = ₦150,000
- Granite: 20 tons at ₦34,000 per ton = ₦680,000
- Total: ₦1,454,000
Reinforcement Work:
- 16mm Rods: 50 lengths at ₦14,800 each = ₦740,000
- 12mm Rods: 60 lengths at ₦9,000 each = ₦540,000
- 10mm Rods: 50 lengths at ₦8,500 each = ₦425,000
- Binding Wire: 30kg at ₦3,700 per kg = ₦111,000
- Total: ₦1,816,000
Carpentry Work:
- 1×12 Planks: 150 pieces at ₦2,600 each = ₦390,000
- Nails: 2 bags at ₦32,000 each = ₦64,000
- Total: ₦454,000

Subtotal (Ground Floor to Deck Level):

Material Cost: ₦5,864,000
Labor Cost: ₦2,000,000
Total: ₦7,864,000

3. First Floor to Roof Level

Materials Required:

Block Work:
- 9-inch Blocks: 2,500 pieces at ₦500 each = ₦1,250,000
- Cement: 40 bags at ₦7,800 each = ₦312,000
- Sharp Sand: 4 trips at ₦50,000 per trip = ₦200,000
- Total: ₦1,762,000
Concrete Work:
- Cement: 70 bags at ₦7,800 each = ₦546,000
- Sharp Sand: 2 trips at ₦50,000 per trip = ₦100,000
- Granite: 15 tons at ₦34,000 per ton = ₦510,000
- Total: ₦1,156,000
Reinforcement Work:
- 12mm Rods: 50 lengths at ₦9,000 each = ₦450,000
- 10mm Rods: 40 lengths at ₦8,500 each = ₦340,000
- Binding Wire: 20kg at ₦3,700 per kg = ₦74,000
- Total: ₦864,000
Roofing:
- Roofing Sheets: 250 square meters at ₦5,500 per square meter = ₦1,375,000
- Wood for Roofing: Estimated = ₦800,000
- Nails and Accessories: Estimated = ₦200,000
- Total: ₦2,375,000

Subtotal (First Floor to Roof Level):

Material Cost: ₦6,157,000
Labor Cost: ₦2,500,000
Total: ₦8,657,000

4. Finishing Stage

Materials Required:

Plastering:
- Cement: 80 bags at ₦7,800 each = ₦624,000
- Sharp Sand: 4 trips at ₦50,000 per trip = ₦200,000
- Total: ₦824,000
Flooring:
- Floor Tiles: 200 square meters at ₦5,500 per square meter = ₦1,100,000
- Tile Cement: 50 bags at ₦7,500 each = ₦375,000
- Total: ₦1,475,000
Painting:
- Paint (Interior and Exterior): 100 liters at ₦3,500 per liter = ₦350,000
- Total: ₦350,000
Electricals:
- Wiring, Fittings, and Fixtures: Estimated = ₦750,000
- Total: ₦750,000
Plumbing:
- Pipes, Sanitary Wares, and Fixtures: Estimated = ₦1,000,000
- Total: ₦1,000,000

Subtotal (Finishing Stage):

Material Cost: ₦4,399,000
Labor Cost: ₦1,500,000
Total: ₦5,899,000

Grand Total for Building the 5-Bedroom Duplex

Foundation to DPC: ₦9,898,700
Ground Floor to Deck Level: ₦7,864,000
First Floor to Roof Level: ₦8,657,000
Finishing Stage: ₦5,899,000

Overall Total Cost: ₦32,318,700

This cost estimate provides a comprehensive guide to budgeting for a 5-bedroom duplex in Nigeria in 2025. Always consult with professionals for accurate pricing and construction management tailored to your specific needs.

This guide equips you with all the insights needed to budget and plan for your 5-bedroom duplex in Nigeria. Ready to start building? Share your thoughts or questions in the comments below!

Tips for Building in Nigeria

Consult Professionals: Always work with architects, engineers, and quantity surveyors for accurate pricing.
Plan for Fluctuations: Prices of materials and labour may vary by location and market conditions.
Invest in Quality: Durable materials and skilled labour save money in the long run.

Also read: Cost of building a 3 bedroom bungalow in Nigeria

Frequently Asked Questions

1. How much does it cost to build a duplex in Nigeria in 2025?
The total estimated cost for a 5-bedroom duplex is around ₦32.3 million, depending on location, design, and material prices.

2. How can I save on building costs?
Buying materials in bulk and sourcing locally can help reduce expenses.

3. Do I need government approvals?
Yes, you’ll need building permits and land documentation from local authorities.