Assumptions:
Bungalow size: ~120 m² (common 3-bedroom footprint)
Soil: Typical (not extreme rocky or black-cotton requiring highly deep foundation)
Foundation type: Reinforced strip foundation + footing + base slab
Material & labour prices in line with 2025 input cost indices
Cost Drivers & Data Points:
Construction Input Price Index (CIPI) for Q2 2025 is 119.75, up from 119.05 in Q1.
Cement, steel rebar, and other key materials have moderate increases: e.g., cement index +0.92%, steel/rebars +1.52%.
Labor costs have also grown modestly.
According to the Architectural Association of Kenya, construction cost per m² for standard quality houses has increased significantly.
💵 Estimated Foundation Cost (3-Bedroom Bungalow)
| Component | Estimated Cost |
|---|---|
| Excavation & site prep | KSh 80,000 – 150,000 |
| Hardcore filling + blinding | KSh 120,000 – 200,000 |
| Reinforcement, formwork & concrete (strip footings + slab) | KSh 250,000 – 500,000 |
| Misc (curing, water, transport) | KSh 40,000 – 100,000 |
Estimated Total Foundation Cost (2025): KSh 490,000 – 950,000
⚠️ Risks & Sensitivity
If the land has poor soil, costs can go beyond the high end due to deeper footings.
If steel or cement prices spike further (import cost risk), estimates may be off → margin for error.
Labor cost fluctuations: masons, rural vs urban labour rates.
Transport cost for materials: affected by fuel costs and distance.
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