How to Know If a Building Contractor in Nigeria Is Genuine or a Fraud

Nigerians lose billions of naira every year to dishonest or incompetent building contractors. This guide shows you exactly how to identify a genuine contractor — before you hand over a single kobo.

Building a house in Nigeria is one of the most significant financial decisions most families will ever make. Yet thousands of people yearly hand over millions of naira to contractors who abandon the job, cut corners on materials, or disappear entirely once the initial payment clears. This guide will not guarantee you never encounter a bad contractor, but it provides you with every tool that can help significantly reduce that risk.

Why This Problem Is So Common in Nigeria

The Nigerian construction sector has one of the lowest barriers to entry among other professional fields in the country. There is no universal licensing requirement enforced at the level of everyday residential contracts, no mandatory insurance, and no central registry that homeowners can check before committing. This makes it very easy for unqualified individuals to present themselves as experienced contractors.

Construction fraud in Nigeria typically follows a predictable pattern: the contractor presents an impressively low quote, collects a substantial upfront payment, begins work visibly enough to seem credible, and then either slows dramatically, delivers substandard work, or vanishes, often blaming rising material costs, unpaid workers, or the client's own supposed delays. By the time the client realizes what has happened, significant money is already gone, and the partially completed structure is an expensive problem.

The good news is that this pattern has clear warning signs at every stage. Knowing them is what separates people who get burned from people who do not.

Nigerian Context

The Council for the Regulation of Engineering in Nigeria (COREN) and the Council of Registered Builders of Nigeria (CORBON) are the main regulatory bodies for construction professionals. Genuine contractors working on larger projects should be able to show affiliation with at least one of these bodies.

1. Verify Registration and Professional Credentials

Nigeria has formal registration systems for building professionals, though they are not always enforced for small residential jobs; they remain one of the most reliable indicators of a contractor's legitimacy. The Council of Registered Builders of Nigeria (CORBON) registers building contractors and technicians, while the Council for the Regulation of Engineering in Nigeria (COREN) covers registered engineers involved in construction.

For any project above a renovation or minor repair, a new building, a major extension, a multi-story structure, ask specifically whether the contractor or the lead professional on their team is CORBON or COREN registered. A genuine contractor at this level will be familiar with these bodies and able to produce a registration number you can verify. An unregistered contractor should not be disqualified automatically for smaller jobs, but you should compensate by being more rigorous in every other area of your vetting.

Looking at the contractor's business registration. A company that has been properly registered with the Corporate Affairs Commission (CAC) has a verifiable paper trail; a registered address, named directors, and a history of existence. Ask for the RC number and verify it on the CAC website. A sole operator running a phone-only business with no formal registration is a materially higher risk than an entity with documented legal existence.

How to Verify

CORBON and COREN maintain searchable registers. Ask the contractor for their registration number and verify it directly with the relevant body by phone, email, or online search. A contractor who claims registration but cannot produce a number should be treated as unregistered.

2. Inspect Previous Work — In Person Where Possible

A portfolio of photographs is a starting point, not a conclusion. Photos can be borrowed, staged, or simply misleading. A beautiful exterior photograph tells you nothing about the structural quality beneath it. The only way to properly evaluate a contractor's work is to see it directly, and ideally to speak with the people who commissioned it.

Ask the contractor to provide the addresses of two or three completed projects you can visit, and to connect you with the homeowners or project managers who hired them. Then, actually visit or call. When speaking with a previous client, ask specific questions: Did the work finish on time? Were there cost overruns, and were they communicated in advance? Were there any structural or finish quality issues after completion? How did the contractor handle problems when they arose? Would you hire them again for a larger project?

Pay attention to what you see during a site visit. Inspect the finish on walls and surfaces: if the tiles are level and grouted, look for gaps around window frames, and how cables and pipes are run. Quality construction is visible in the details. A contractor who delivers on small details is more likely to deliver on the big picture.

Ask if the contractor has ongoing projects, which any active contractor should have. Ask to visit a live site. Observing an active site tells you how the contractor manages workers, materials, and safety. A disorganized site with no clear supervision, materials stored carelessly, and workers without safety equipment signals poor management, regardless of how polished the contractor's presentation appears.

Watch Out For

A contractor who says they cannot provide site visit access because clients "prefer privacy" is almost certainly stalling. Legitimate homeowners who are satisfied with their contractor are usually happy to let a prospective client visit, and many consider it a compliment to the quality of their home.

3. Confirm a Physical Presence

Genuine building contractors in Nigeria, even relatively small operations, have a physical base - an office, a yard, a storage compound, or at least a fixed business address where they can be found, and where materials and equipment are kept. A contractor who exists only as a phone number and a WhatsApp display picture is a serious risk.

Visit the contractor's base before signing any agreement. You are not being rude; you are doing the basic due diligence that any sensible client should do before committing potentially millions of naira. What you see at their base tells you a great deal: Do they have equipment? Do they have workers who know them? Is the space organized? Is there evidence of active business — pending materials, ongoing planning, and communication with suppliers?

Additionally, look for how long they have been in that location. A business that has been operating from the same address for three or more years has demonstrated a level of stability and permanence that a recently set-up operation cannot claim. Ask neighbors or nearby businesses if they recognize the contractor. In Nigerian commercial environments, people who have been operating in a location for years are well-known to those around them.

4. Get Multiple Quotes and Understand What They Cover

Never accept the first quote you receive, and never award a contract to the cheapest bidder without understanding why their price is lower than everyone else's. In Nigerian construction, a dramatically cheap quote almost always means one of three things: corners will be cut on materials, the timeline will be artificially extended to reduce labor costs, or the contractor intends to create scope gaps later that justify additional payments.

Obtain a minimum of three detailed quotes from three different contractors for the same scope of work. Provide each contractor with an identical written brief, the same drawings, the same specifications, and the same timeline expectations, so that you are comparing like with like. If quotes vary by more than 20 to 30 percent, ask each contractor to walk you through their pricing in detail.

1 Use identical briefs for all quotes

Send the same drawings and specifications to every contractor. Varying briefs produce incomparable numbers.

2 Ask for a full bill of quantities

A genuine contractor can itemize: so many bags of cement, so many tonnes of iron rods, so many square metres of tiles.

3 Verify material specifications

Ask what brand and grade of cement, blocks, iron rods, and roofing sheets are in the quote. Lower specs always equal a lower price.

4 Get the mid-range quote — not the lowest

The middle quote from a vetted contractor is almost always the safest choice. The cheapest is nearly always the riskiest.

Serious Warning

If a contractor's quote is more than 30 percent below the other two quotes you received for the same scope, walk away. No legitimate contractor can sustainably deliver quality work at that margin. The gap will eventually appear somewhere — in the materials used, the workers paid, or in the abandonment of the project entirely.

5. Insist on a Proper Written Contract

The contract is the single most important document in any building project, and yet a significant number of Nigerian homeowners begin construction without one. "He is a trusted person," and "we agreed by word of mouth" are phrases that have preceded countless expensive disputes. A genuine contractor will not only agree to a written contract — they will expect one and may already use a standard form.

A proper building contract in Nigeria should include at a minimum the following elements:

Scope of work

Detailed description of every task to be performed, listed explicitlyPrevents disputes about what is and is not included in the price

Bill of quantities

Materials to be used, with brands, grades, and volumes specifiedLets you verify that what was agreed is what is being used on site

Timeline

Start date, key milestones, and completion date — all specificCreates accountability for delays and a basis for penalty clauses

Payment schedule

How much, when, and against what milestone each payment is tiedProtects you from paying ahead of progress

Defects liability

Period during which contractor is responsible for fixing structural defects at no costEssential for catching problems that only appear after project completion

Variation clause

How changes to scope, materials, or timeline are agreed and pricedPrevents unauthorized cost additions that appear on the final bill

Dispute resolution

What happens if there is a disagreement — mediation, arbitration, or courtEstablishes a process before emotions are running high

The defects liability clause deserves special attention. This provision requires the contractor to return and fix, at their own cost, any structural defects that emerge within a specified period after completion, typically six months to one year. Without this clause, a contractor who delivers work with hidden faults has no legal obligation to return to the job. Insist on it, and insist that it is specific about what counts as a defect and what the remedy process looks like.

6. Structure Your Payments to Protect Yourself

How you pay is as important as who you pay. Nigerian construction projects have been derailed by two opposite payment mistakes: clients who pay too much too soon and lose leverage when things go wrong, and clients who pay too little too late, lose contractors who cannot sustain the project without working capital. The solution is a structured milestone payment plan tied directly to verified progress on site.

30% Mobilization

Paid at contract signing to cover initial materials purchase and site mobilization. Confirm materials arrive before further payments.

40% During construction

Released in stages tied to verified milestones — foundation complete, DPC level, lintel level, roofing complete, and so on.

30% On completion

Released only after full inspection, testing of all installations, and your written sign-off on the completed work.

Never make payments based on a contractor's verbal assurance that money is needed. Payments should be triggered by what you can see and verify: materials delivered to the site, structural elements completed, and inspections passed. Keep bank transfer records of every payment made, and request signed receipts. Cash payments with no documentation are an invitation to dispute.

"In Nigerian construction, your money is your leverage. The moment you pay everything up front, you have made yourself vulnerable and given that leverage away. Structure your payments to follow progress, and not promises."

7. Know the Red Flags — All of Them

Most building fraud in Nigeria follows recognizable patterns that appear before the contract is even signed. The following warning signs should be observed and treated as serious disqualifiers, not minor concerns to overlook.

• The contractor can not show completed projects or provide references that you can independently contact.

• The contractor has no physical office, yard, or business address, and operates only by phone.

• The quote provided by the contractor is significantly lower than every other quote, without a credible explanation.

• Cannot produce a bill of quantities that itemizes materials by type, brand, and volume

• Resists putting anything in writing or suggests a verbal agreement is sufficient

• Requests more than 40 to 50 percent upfront before any work begins

• Cannot name their workers or explain who will be supervising the daily site work

• Becomes vague or evasive when asked about a project that did not go well

• Pushes urgency: "I have another job starting next week, so I need a decision now."

• Has no CAC registration number or gives a number that does not verify

• Refuses to include a defects liability clause in the contract

• Site visits reveal disorganized work, idle workers, and materials inattentively stored.

8. Supervise Actively or Hire Someone Who Will

Signing a contract and paying a deposit is not the end of your responsibilities as a client; it is the beginning of them. Nigerian construction projects that go wrong almost always share one common factor: An absent client. The old construction saying holds here: contractors perform to the level of supervision they receive. No supervision means no accountability.

Visit the site regularly and at unpredictable times; not just for the scheduled check-ins. Unannounced visits reveal the actual pace of work and the actual materials being used, rather than the staged version a contractor might present if they know you are coming. Inspect that the cement brand specified in the contract is the brand being mixed, and that the iron rod sizes are what was agreed. These details matter enormously for structural integrity and are the easiest means for contractors to cut corners on if no one is watching.

If you are not in Lagos or cannot visit regularly, engage a quantity surveyor or project manager to supervise on your behalf. This is not an optional luxury, but for any significant construction project, professional site supervision is as necessary as the contractor themselves. A quantity surveyor can also verify that materials delivered match what was invoiced, preventing a common form of billing fraud where contractors charge for materials they have not actually purchased at the specified quality.

Practical Advice

Set up a project WhatsApp group with the contractor and their site supervisor. Require daily photo updates from the site, showing the day's progress, the materials in use, and the number of workers present. This costs nothing extra and creates a timestamped visual record of the project's progress that is invaluable if a dispute arises later.

9. Take Control of Materials Procurement

One of the most effective ways to prevent contractor fraud in Nigeria is to take direct control of materials purchasing, or at least, to be deeply involved in it. When a contractor buys materials on your behalf with your money, there are multiple points at which the quality or quantity of what is purchased can differ from what was agreed and what was paid for.

For major material categories (cements, iron rods, blocks, roofing sheets, tiles, and electrical cables), consider either purchasing directly from reputable suppliers and having materials delivered to the site, or accompanying the contractor to the supplier for significant purchases. This eliminates the most common materials-related fraud: purchasing cheaper alternatives and pocketing the difference, or simply buying less than what was invoiced.

Keep a running log of what has been delivered to the site, precise dates, and the quantity of material delivered. Even better are the photographs of each delivery, with timestamps. This becomes your reference point if there is ever a dispute about whether a contractor completed the work using the agreed materials.

Frequently Asked Questions

How much should building a standard 3-bedroom bungalow cost in Lagos in 2026?

Costs vary significantly by location, finish quality, and current material prices. A modest 3-bedroom bungalow in Lagos can range from ₦30 million to ₦60 million for mid-range finishes, with costs rising to ₦80 million and above for higher specifications. These figures fluctuate with exchange rates, cement prices, and iron rod prices, so always base your budget on current supplier quotes rather than older estimates. A qualified quantity surveyor can produce a precise bill of quantities for your specific design and location.

What should I do if a contractor abandons my project after collecting payment?

Document everything immediately. All payment records, the signed contract, site photographs, WhatsApp conversations, and any progress reports. Contact the contractor in writing, clearly stating that you consider the contract breached and setting a deadline for them to return to the project or respond. If they do not respond, consult a lawyer promptly. Construction contract disputes can be pursued in court or through arbitration, depending on what your contract specifies. Report the contractor to CORBON or COREN if they are registered, as professional bodies can apply disciplinary pressure. For future protection, the milestone payment structure in this guide ensures no contractor receives full payment before delivering full value.

Do I need a quantity surveyor if I already have an architect?

Yes. A quantity surveyor serves different functions. An architect designs the building and manages design intent. A quantity surveyor (QS) measures and prices the construction work, verifies that materials purchases match specifications, and provides financial oversight of the project. On any significant building project, having both is strongly advisable. The QS fee is typically between 2 and 5 percent of the total project cost — a modest expense that can prevent losses many times that amount through proper oversight.

Can I legally stop a contractor from leaving if I have a signed contract?

A signed contract gives you legal recourse, and not physical control over the contractor. If a contractor abandons a project in breach of contract, your remedies are legal: you can sue for breach of contract to recover losses, obtain a court order for specific performance in some circumstances, or pursue the unpaid balance of the advance through the courts. This is why having a signed contract matters so much — without it, your legal position is significantly weaker. Engage a construction lawyer promptly if a contractor abandons your project.

Is it better to hire a contractor who supplies their own materials or one who works on a labour-only basis?

Both models have legitimate use cases. A contractor who supplies materials offers convenience and typically takes responsibility for the quality of materials. A labour-only arrangement gives the client direct control over what is purchased and eliminates materials-related fraud. For clients who can commit time to sourcing materials and monitoring deliveries, labour-only can result in better value and greater transparency. Practically, for busy clients who require a more hands-off arrangement, a supply-and-build contract with a rigorous bill of quantities and active site supervision can be more convenient.

Final Thoughts

A genuine building contractor in Nigeria is not hard to find, but they are easy to overlook when you are focused on getting the lowest price or the fastest start date. Genuineness is seen in small, consistent ways: the willingness to provide references, the ability to produce a bill of quantities, the readiness to sign a detailed contract, the existence of a verifiable business address, and registration.

Take your time before committing. Verify credentials, visit past projects, receive three or more comparable quotes, structure your payments to follow progress, actively supervise the site, and get every agreement in writing. Each of these steps takes a little extra time at the beginning, and saves enormous amounts of time, money, and stress before the project is done.

Your building project represents years of savings and one of the biggest financial commitments of your life. It deserves a contractor who has earned your trust, not just one who asked for it.