When you hire a contractor in Kenya, their NCA registration category directly determines the size and type of project they are legally permitted to undertake. Hiring the wrong category is not just a regulatory violation — it can void your insurance and create personal liability for the project owner.
The NCA grades contractors from NCA1 (the most capable) through NCA7 (the smallest), based on their financial capacity, equipment, personnel, and track record. Each grade carries both a maximum project value cap and minimum eligibility requirements.
Contractors hold separate NCA registrations for Building Works and Road Works. A company can be NCA4 for buildings and NCA6 for roads simultaneously. Always verify both categories match your project scope — a building contractor's NCA category does not automatically authorize road construction work.
The NCA has tightened its 2026 renewal requirements significantly. Contractors must now provide:
The NCA maintains a live online register at nca.go.ke. Search by company name or registration number. Beware of contractors who present expired certificates — NCA registration must be renewed annually. Arch Expert Limited's current NCA certificates (Road Works: 81642/R/1222, Building: 81642/B/1222) are always available to clients on request.
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