Kenya Construction Cost Calculator
Estimate house and commercial building construction costs in Kenya based on IQSK and BORAQS rate benchmarks, elemental breakdown, and basic material quantities.
Rates are derived from the Institute of Quantity Surveyors of Kenya (IQSK) Construction Costs Handbook averages. Actual contract prices require a site-specific Bill of Quantities (BoQ).
Elemental Stage Cost Breakdown
Standard BORAQS Stage Split| Building Element / Stage | Share | Estimated Cost (KES) |
|---|---|---|
Substructure & Foundation Site clearance, trench excavation, foundation footing, hardcore, DPM, and ground floor slab. | 17% | Ksh 1,326,000 |
Superstructure (Walling & Frame) Machine-cut stone walling, reinforced concrete columns, ring beams, and lintels. | 26% | Ksh 2,028,000 |
Roofing & Rainwater Goods Treated timber/steel roof trusses, roofing tiles/sheets, underlay, fascia, and gutters. | 13% | Ksh 1,014,000 |
Doors, Windows & Glazing Exterior and interior doors, aluminium/steel window casements, glazing, and ironmongery. | 8% | Ksh 624,000 |
Finishes (Plaster, Screed, Tiles & Paint) Wall plastering, floor screed, ceramic/porcelain tiling, gypsum ceilings, and internal/external painting. | 18% | Ksh 1,404,000 |
Plumbing, Drainage & Sanitary Installations PPR water piping, waste drainage, septic tank/sewer connection, sanitary fixtures, and overhead tanks. | 7% | Ksh 546,000 |
Electrical & Lighting Installations Conduiting, copper wiring, consumer units, sockets, designer switches, and lighting fixtures. | 6% | Ksh 468,000 |
External Works & Drainage Splash apron around the building, storm water drainage channels, and entry pavement. | 5% | Ksh 390,000 |
| Base Construction Total | 100% | Ksh 7,800,000 |
Estimated Major Material Quantities for 150 m² Plinth Area
Rule-of-thumb material estimates based on typical Kenyan residential masonry and reinforced concrete structures:
Cement (50kg bags)
~630 bags
For slab, walling & plaster
River Sand
~165 tonnes
≈ 17 tipper lorries
Ballast / Gravel
~135 tonnes
Foundation footing & slab
Masonry Stones
~4,200 pcs
9x9 foundation & 6x9 walling
Steel Rebar
~1,800 kg
Y8, Y10, Y12, Y16 bars
Roofing Sheets / Tiles
~195 sheets
Gauge 28/30 or Box profile
Estimated Total Budget
Estimated Total Cost
Ksh 8,814,000
- Plinth Area
- 150 m²
- Rate per m²
- Ksh 52,000
- Region Factor
- Nairobi
- Finishes Tier
- Standard
Direct Construction WorkKsh 7,800,000
Professional Fees (8%)Ksh 624,000
Contingency Reserve (5%)Ksh 390,000
Total Estimated BudgetKsh 8,814,000
Required Kenya Construction Approvals
- County Government Approval: Architectural & Structural drawings approval stamped by registered BORAQS/EBK professionals.
- NEMA License: Environmental Impact Assessment (EIA) clearance.
- NCA Compliance: National Construction Authority project registration and licensed contractor accreditation.
How this tool works
Building cost estimation in Kenya is calculated by applying current market rates per square metre (m²) adjusted for building typology, regional factors, and finishing specifications:
- Plinth Area Rate: Base rate multiplied by the regional supply index and the finishes tier coefficient (Economy, Standard, or Luxury).
- Elemental Cost Breakdown: Substructure (17%), Superstructure (26%), Roofing (13%), Finishes (18%), Doors & Glazing (8%), MEP Services (13%), External Works (5%).
- Professional Fees: 8% allowance for registered Architect, Quantity Surveyor (QS), and Structural Engineer drawings and site supervision.
- Contingency: 5% reserve for unforeseen ground conditions or material price changes.
Frequently asked questions
- What is the average cost of building a house per square metre in Kenya?
- According to the Institute of Quantity Surveyors of Kenya (IQSK) and BORAQS benchmarks, building a standard residential bungalow costs approximately KES 48,000 to KES 62,000 per square metre (m²), while a standard two-storey maisonette ranges between KES 58,000 and KES 78,000 per m². High-end luxury finishes can reach KES 95,000 to KES 135,000+ per m².
- What percentage of the budget should I allocate for professional fees?
- Professional fees for registered Architects, Quantity Surveyors, and Structural Engineers typically range between 6% and 10% of total construction costs, as regulated by BORAQS and the Engineers Board of Kenya (EBK).
- How do regional locations affect building costs in Kenya?
- Nairobi and Kiambu serve as the baseline due to competitive supply chains. The Coast region is typically 8-10% higher due to specialized anti-corrosion/saline specifications, while remote or arid upcountry counties incur higher freight transport costs for cement, steel, and stone.
- What statutory approvals are required before starting construction?
- In Kenya, you must secure: 1) County Government Architectural and Structural approval; 2) National Construction Authority (NCA) project registration; and 3) National Environment Management Authority (NEMA) environmental impact assessment license.