Assumptions:
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Bungalow size: ~120 m² (common 3-bedroom footprint)
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Soil: Typical (not extreme rocky or black-cotton requiring highly deep foundation)
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Foundation type: Reinforced strip foundation + footing + base slab
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Material & labour prices in line with 2025 input cost indices
Cost Drivers & Data Points:
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Construction Input Price Index (CIPI) for Q2 2025 is 119.75, up from 119.05 in Q1.Â
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Cement, steel rebar, and other key materials have moderate increases: e.g., cement index +0.92%, steel/rebars +1.52%.Â
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Labor costs have also grown modestly.Â
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According to the Architectural Association of Kenya, construction cost per m² for standard quality houses has increased significantly.Â
đź’µ 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
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If the land has poor soil, costs can go beyond the high end due to deeper footings.
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If steel or cement prices spike further (import cost risk), estimates may be off → margin for error.
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Labor cost fluctuations: masons, rural vs urban labour rates.
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Transport cost for materials: affected by fuel costs and distance.
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