The Cost Landscape Has Changed
If you last built in Kenya two or three years ago, your cost assumptions are almost certainly out of date. A combination of currency depreciation, import duty adjustments, fuel costs, and post-pandemic supply chain recovery has reshaped what it costs to build in 2025.
This article draws on construction cost data across Nairobi, Mombasa, Kisumu, and Nakuru to give you a current benchmark — and flag the variables that matter most.
Structural Works: Concrete and Steel
Reinforced concrete remains the dominant structural system for mid-rise construction in Kenya. Current benchmarks (Q1 2025):
- Grade 25 concrete (supply only): KES 9,500 – 11,000 per m³
- Reinforcement steel (Y12–Y25): KES 115 – 130 per kg
- Structural formwork (labour + materials): KES 1,800 – 2,400 per m²
Steel prices are closely tied to global scrap prices and the KES/USD rate. The shilling's stabilisation in early 2025 has helped moderate steel costs, but watch for volatility in Q3 when the monsoon disrupts Mombasa port throughput.
Walling and Masonry
Burnt brick has made a comeback as an alternative to hollow concrete blocks (HCBs), particularly in Central and Eastern regions where clay is available locally:
- Hollow concrete blocks (150mm): KES 65 – 80 per block
- Burnt bricks: KES 18 – 25 per brick (inclusive of 5 bricks per 150mm block equivalent)
- Sand (per tonne, Nairobi region): KES 3,200 – 4,500 depending on source and distance
Roofing
Corrugated iron sheet (CIS) roofing dominates the affordable segment. Gauge 30 sheets are the most common specification:
- Gauge 30 CIS (3m sheet): KES 750 – 900 per sheet
- Timber purlins (50×100mm per lm): KES 180 – 240
- Clay tiles (imported): KES 35 – 55 per tile — a premium but increasingly popular in mid-market housing
Labour Rates
Skilled labour shortages continue to push rates upward in Nairobi. Daily rates for direct hire (no agency markup):
- Mason (fundi): KES 1,000 – 1,500/day
- Carpenter: KES 1,200 – 1,800/day
- Electrician (licensed): KES 1,500 – 2,500/day
- Labourer: KES 600 – 900/day
Note that the Minimum Wages Order sets a floor, but market rates in Nairobi now significantly exceed the legal minimum for skilled trades.
Where Developers Are Finding Savings
- Prefabricated elements: Precast staircases, columns and beams are reducing on-site formwork time by 30–40% on mid-rise projects.
- Early contractor involvement: Engaging a contractor during design (rather than post-tender) allows value engineering before specifications are locked.
- Local material sourcing: Developers who specify Kenyan-manufactured cement, locally fired bricks, and domestic steel (where available) are insulated from import cost volatility.
- Competitive tendering: Projects tendered on BilaFundi consistently attract 4–7 qualified bids, giving owners genuine market pricing rather than a single negotiated rate.
Get a Personalised Estimate
Use BilaFundi's free AI Cost Estimator to get a structured breakdown for your specific project — materials, labour, permits, and professional fees — calibrated to your location and scope.