It is one of the most common stories in Kenyan construction: a confident contractor, a reasonable sounding quote, a project that stalls at the slab stage, and a budget that has quietly doubled by the time anyone admits something has gone wrong. Most of these situations were avoidable. The warning signs were there early, they just were not checked.

Start with NCA registration, and verify it yourself

Under the National Construction Authority Act, 2011, it is unlawful to carry on business as a contractor in Kenya without being registered with the NCA and holding a valid practising licence. Every legitimate contractor should be able to produce this. The mistake most people make is stopping there.

Do not accept a copy of a certificate as proof. The NCA maintains a public register specifically so clients can verify a contractor themselves. Search the contractor's name or licence number directly on the NCA portal and confirm their registration category and status are current, not expired or pending renewal.

This matters more than it used to. The NCA has been actively deregistering contractors who fail to renew their licences for two consecutive years, issuing final warnings to thousands of firms with outstanding fees and unmet continuing professional development requirements. A contractor whose registration has lapsed is, as far as the law is concerned, not currently authorized to be doing this work at all, regardless of how experienced they genuinely are.

Match the registration category to your project

NCA registration is graded by category, from NCA 1 at the top, cleared for major infrastructure, down through lower categories suited to smaller scale work. For a typical residential build or mid-sized project, a contractor registered in the mid-range categories is the relevant fit. A contractor whose registration sits well below the scope of your project is a real risk, even if their quote looks attractive, since it may reflect a genuine mismatch between their verified capacity and what you are asking them to deliver.

Beyond NCA status, what else to check

• A real, verifiable portfolio. Ask for completed projects you can actually see, or at minimum photographs plus contact details for past clients willing to speak about their experience.
• Technical personnel credentials. NCA registration requires a technical director with relevant qualifications, and any engineers or specialists on the project should separately hold valid registration with their own professional bodies, such as the Institution of Engineers of Kenya or the Engineers Board of Kenya.
• Financial soundness, not just enthusiasm. A contractor with genuine capital can reasonably begin work against a fair mobilisation payment and structured milestone billing. One who needs the bulk of the budget upfront before any real work starts is signaling something about their own financial position, not confidence in the project.
• Willingness to put timelines and milestones in writing. Reluctance here is one of the clearest tells. A contractor with a real plan can commit it to paper. One who cannot, or will not, often simply does not have one yet.

Get multiple quotes, and compare properly

Collect at least three quotes from NCA-registered contractors before committing. Comparing is not just about the bottom line figure, look closely at what is actually included, materials specified, labour scope, and timeline, since a dramatically lower quote often means something has been quietly left out rather than genuine efficiency.

Red flags worth walking away from

• Unofficial middlemen or agents promising faster approvals for cash. This pattern shows up in NCA's own registration process too, and it is never a legitimate shortcut.
• Demanding most of the payment upfront, before meaningful work has been done.
• No written contract, or resistance to putting milestones and timelines in writing.
• A quote dramatically below every other bid, with no clear explanation for the gap.
• No fixed business address or verifiable physical presence.
• Pressure to decide immediately, discouraging you from checking registration or references first.

Structuring payments to protect yourself

1. A reasonable mobilisation payment, enough to genuinely get work started, not the bulk of the total contract value.
2. Milestone-based payments, released only once each stage, foundation, walling, roofing, finishes, is independently verified as complete.
3. Retention money held back, a small percentage of the total contract value kept until the defects liability period after completion has passed, protecting you against work that looks fine on handover but fails shortly after.
4. A written contract covering scope, materials, timeline, and remedies for delay, reviewed ideally by your own quantity surveyor or advocate, not drafted solely by the contractor.

Registering the project itself

Beyond the contractor's own registration, the project itself generally needs to be registered with the NCA, with the contractor's compliance certificate and the project consultants' professional registrations submitted as part of that process. This creates an official record of who is actually responsible for the work, useful protection if a dispute arises later.

The bottom line

A contractor's confidence and a reasonable-sounding quote tell you very little on their own. What actually protects you is independent verification, searching the NCA portal yourself, matching their registration category to your project's real scale, getting a written contract with milestone-based payments, and treating reluctance to document anything as a serious warning sign rather than a minor personality quirk. The few hours this takes upfront are far cheaper than discovering the problem at the slab stage, with half your budget already gone.

This article provides general information for educational purposes only, not legal or professional advice. Contractor registration requirements, fees, and NCA enforcement practices change over time. Always verify current contractor status directly on the NCA portal and consult a qualified quantity surveyor or advocate before signing a construction contract.