Building a house, especially one intended for rental purposes, requires careful planning to strike the right balance between quality and cost-effectiveness. In this detailed cost estimate, we’ll break down the expenses involved in constructing four 3-bedroom flats, helping you gain a clear understanding of what to expect at each stage.
Pre-Building Costs:
- Survey: N100,000
- Architectural Design: N100,000
- Lawyers Agreement Cost: N30,000
Stage 1 Construction – Setting the Foundation: Materials:
- 80 tons of sand: N120,000
- 50 tons of granite: N170,000
- 150 bags of cement: N247,500
- 2500 stone-dust blocks: N425,000
- BRC Wire Mesh: N135,000
- Planks and nails: N75,000
- Water supply: N22,000
- Iron bars for foundation columns: N130,000
- Laterite for backfilling: N150,000
- Two 2500 liters tanks: N70,000
Summary: N1,544,500
Workmanship:
- Setting out, pegs, and profiles: N15,000
- Clearing of site and road: N50,000
- Digging of foundation trenches: N100,000
- Casting of foundation concrete: N40,000
- Setting of foundation blocks: N100,000
- Backfilling of foundation: N70,000
- Iron bending for reinforcement: N50,000
- Formwork for columns and DPC: N30,000
- Casting of DPC: N70,000
- Digging of 2 soakaway pits and 2 septic tanks: N60,000
Summary: N585,000
Other Costs:
- Architect’s supervision: N150,000
- Contingencies: N100,000
Grand Total of All Costs (Stage 1): N2,379,500
Note: Costs can be adjusted to N1.9 million or less without compromising quality.
Stage 2 Construction: Materials:
- 60 tons of sand: N105,000
- 25 tons of granite: N85,000
- 150 bags of cement: N337,500
- 4500 stone-dust blocks: N900,000
Total: N1,427,500
Formwork for Lintel, Beam, and Columns:
- Wood and nails: N84,000
Iron Rods for Lintels, Beams, and Columns:
- Various sizes: N220,750
Summary: N1,732,250
Workmanship:
- Setting of block walls: N180,000
- Formwork and ironworks: N90,000
- Casting of structural elements: N320,000
- Contingency: N100,000
- Architect’s Supervision: N150,000
General Summary (Stage 2): N2,302,250
Additional Costs to Consider:
- Fencing: N300,000 – N500,000
- Plastering: Over a million (varies based on preferences)
- Other details like PVC ceilings, POP ceilings, floor tiling, aluminum windows, burglary proof, doors, fittings, wirings, roofing, plumbing, and labor are based on personal taste and material choices.
Conclusion
this comprehensive estimate provides a roadmap for the cost of constructing 4 flats. Whether you’re aiming for affordability or luxurious finishes, this breakdown guides you through the stages, allowing for flexibility in meeting your budgetary needs.