Cost to build a 300 sqm house in Nairobi in 2026

Updated 2026 · Kenya · Reference estimate

In short: for a 300 sqm house in Nairobi, expect roughly 11,760,000 KSh for an economy finish, up to 29,400,000 KSh for high-end. Plan for about 549 bags of cement, 3,916 blocks, 4,555 kg of steel and 56.9 m³ of concrete. These are the items a contractor can inflate, so these are the numbers to have proven.

Estimated budget in Nairobi by finish level

Level	Price / sqm	Total (300 sqm)
Economy	39,200 KSh	11,760,000 KSh
Standard	56,000 KSh	16,800,000 KSh
High-end	98,000 KSh	29,400,000 KSh

Indicative 2026 ranges, turnkey finish, excluding land and administrative fees. They help you spot an abnormally high quote, not replace a proper bill of quantities.

Material quantities for 300 sqm (single storey)

Item	Estimated quantity
Cement (50 kg bags)	549 bags
Blocks 20x20x40	3,916 u
Rebar steel	4,555 kg (~426 HA12 bars)
Total concrete to pour	56.9 m³
Sand	29 m³
Gravel	46 m³

For a two-storey house, the structure (concrete, steel, cement) roughly doubles, while the ground footprint is divided by the number of floors.

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How to avoid an inflated quote in Nairobi

On a site managed from abroad, overcharging almost always hits three areas: structural materials (cement, steel), inflated quantities, and overbilled labour. Three simple reflexes:

Always compare the quote you receive to an independent reference estimate like the one above. A 10 to 15 percent gap is normal; beyond that, ask for explanations.
Pay by stages, never more than 20 to 25 percent upfront, and demand proof before each stage (a photo of the rebar before pouring, cement bags counted at delivery).
Where possible, buy the major materials yourself and have them delivered to site, rather than advancing cash to the contractor.

Get your exact plan and bill of quantities

The figures above are orders of magnitude for Nairobi. For your exact project, describe your house on nokah or import an existing plan: you get the 3D plan, the detailed bill of quantities and a stage budget in Kenya's currency. You then face your builder with numbers they cannot argue with.