How to Hire a General Contractor: Vetting, Questions, and Red Flags

The decision that most determines whether your project finishes on time, on budget, and to standard is not the design or the materials — it is who you hire to build it. A good general contractor turns a plan into a building with minimal drama; a bad one turns it into missed dates, mounting extras, and work you pay someone else to put right.

The takeaway up front: hire on evidence, not on charm or price. The smoothest pitch and the lowest number are the two most expensive traps in construction. A repeatable process — build a shortlist, verify licence and insurance before you talk money, compare bids like-for-like, screen for red flags, and sign a contract that ties payment to completed work — protects you far better than instinct. This guide walks through it step by step.

What a general contractor actually does

A general contractor (GC) delivers the physical build: hiring and coordinating the trades, ordering materials, running the site day to day, managing the programme, and handing you a finished result against an agreed scope and price. On most residential and small commercial jobs the GC is your single point of accountability — one contract, one throat to choke.

If the job is more than a straightforward renovation and you lack the time or experience to coordinate trades yourself, a GC is usually the right call — the coordination, not the hammering, is the hard part. (A construction manager, by contrast, is paid a fee to manage trades you contract directly, giving you more transparency but more risk.)

Start with a shortlist, not a single quote

Never hire the first contractor you meet, and never price a job off one number. Aim for a shortlist of three you would genuinely be willing to hire, then get comparable bids from all three.

Good sources beat online ads: ask recently completed clients for referrals, request names from your architect or engineer, check your local licensing or trade-body register, and look at contractors who have delivered projects like yours in size, type, and finish level. Three real bids give you a market range so no single number anchors you — and how each contractor prepares a bid reveals how they will run the job.

Vet before you talk price: licence, insurance, and track record

Do this screening before you get attached to anyone's number — it is the step people skip once they have fallen for a low bid. Verify, do not just ask:

• Licence or registration. Confirm the contractor holds whatever licence your jurisdiction requires, directly with the issuing authority rather than from a certificate they hand you. Requirements vary widely by location, so check local rules.
• Insurance. They should carry public/general liability cover plus appropriate cover for employees. Ask for the certificate and, on a significant job, confirm with the insurer that it is current. If a worker is injured or a neighbour's property damaged and the contractor is uninsured, that exposure can land on you.
• References and completed work. Speak to two or three past clients with similar projects and see the work in person where you can. Ask what went wrong and how they handled it — the response is the real tell.
• Track record and stability. How long have they traded under this name? Any unresolved complaints, judgments, or liens? A contractor who folds mid-project is one of the most expensive things that can happen to a build.

None of this is rude to ask. A professional expects it and answers easily; reluctance here is itself information.

The questions to ask a general contractor

Ask each shortlisted contractor the same questions and compare the answers:

• Are you licensed and insured for work of this type and value, and can I verify the details independently?
• Will my job be run by your own employees or by subcontractors, and who is on site each day?
• How many projects will you be running at the same time as mine?
• Can I see two or three completed projects like mine and speak to those clients?
• What is your programme, and what could realistically delay it?
• How do you price and document changes once we have started?
• What is your payment schedule, and what is tied to each payment?
• Who pulls the permits and arranges inspections?
• What warranty do you provide after completion, and what does it cover?

You are listening for specific, confident answers. Vagueness about who is on site, how changes are handled, or what the warranty covers is a warning.

How to compare bids fairly

The most common costly mistake is comparing headline numbers that do not describe the same job. Normalise every bid to the same scope first, then look past the total to what is included, excluded, and merely allowed for.

Bid B is the cheapest headline and the most expensive trap. Its "allowances" are placeholders that get trued-up (almost always upward) once real selections are made; the excluded groundworks reappear the moment a spade hits the soil; the 40% deposit shifts risk onto you; and a programme four weeks shorter than everyone else's is optimism, not efficiency. Add the overruns back in and Bid B meets or overtakes the others — now with a contractor who low-balled to win.

Bids A and C are genuinely comparable once normalised; the choice comes down to references, availability, and how each handles changes. The lowest number is a red flag, not a prize — it usually signals missing scope that returns later as extras, which is how uncontrolled variations wreck a budget. For keeping those in check once work starts, see our guide to controlling change orders.

Red flags that should end the conversation

Some signals are strong enough to walk away on, however likeable the person:

• Demands a large upfront deposit, or wants cash only. A modest deposit for initial materials is normal; a big slice of the total before meaningful work is not. Many places cap upfront payments — check local rules.
• No verifiable licence, or won't show current insurance.
• Won't provide references, a real business address, or examples of past work.
• Pressure tactics — a "today only" price, or pushing you to sign before you have read the contract.
• A single lump-sum bid with no breakdown, so you cannot see what is and isn't included.
• Prices far below every other bid with no credible explanation.
• Wants you to pull the permits in your own name, which quietly shifts liability and code responsibility onto you.
• No written contract, or a one-page "agreement" that leaves scope, price, and schedule undefined.

Any one warrants a hard pause; two together, and you move on.

The contract: what actually protects you

A handshake is not a plan. Whatever the job size, these terms belong in writing before anyone starts — this is where a good choice becomes an enforceable one:

• Scope and specification — a detailed description of the work and materials, so "finished" is defined.
• Price and its basis — fixed price, or cost-plus with a clear fee and open-book costs.
• Payment tied to progress — money released against completed, verifiable milestones, never ahead of the work, with a retention (commonly around 5%) held until defects are made good.
• A change-order clause — how variations are priced, approved in writing, and logged before work proceeds.
• Programme — start and finish dates, and a remedy if the contractor overruns without cause.
• Insurance and indemnity — who carries what cover, evidenced.
• Permits and inspections — who obtains and passes them.
• Warranty / defects liability period — what is covered after handover, and for how long.
• Lien waivers or proof subcontractors are paid, so you are not billed twice for the same work.
• Dispute resolution and termination — how disagreements are handled and how either side can exit.

Contract law and licensing rules vary by jurisdiction, and on a large or complex job a construction lawyer's review costs little against what it protects. When in doubt, get it checked before you sign — not after a dispute starts.

Frequently asked questions

How many quotes should I get before hiring a contractor?

Three comparable bids is the practical sweet spot. Fewer, and you have no market range to judge a number against; many more adds time without much information. The key is that all three price the same defined scope, so you compare like with like, not against whoever quoted the least work.

Is it safe to pay a large deposit upfront?

Be cautious. A modest deposit for initial materials is normal, but a large share of the total before meaningful work is a classic warning sign, and many places legally cap upfront payments. Tie every payment to completed progress, hold a retention until defects are fixed, and never pay cash without a receipt and a written contract behind it.

Should I always choose the lowest bid?

No — an unusually low bid is a red flag, not a bargain. It usually means missing scope, optimistic allowances, or excluded items that reappear as extras once you are committed. Normalise every quote to the same scope first, then weigh price alongside references, insurance, programme, and how the contractor handles changes.

How do I check that a contractor is legitimate?

Verify rather than trust: confirm any required licence directly with the issuing authority, confirm insurance is current with the insurer, speak to recent clients with similar projects, view completed work where you can, and check for unresolved complaints, judgments, or liens. A genuine professional cooperates; resistance is itself an answer.

What's the difference between a general contractor and a construction manager?

A general contractor delivers the build under a single contract, carrying the risk of coordinating trades and hitting the agreed price. A construction manager is typically paid a fee to manage trades you contract directly, giving you more cost transparency but leaving more delivery risk with you. Which fits depends on how much control and risk you want to hold.

Do I really need a written contract for a small job?

Yes — always. The written contract defines scope, price, schedule, and what happens if something goes wrong. Small jobs are where people rely on a handshake and where disputes over "what was included" most often arise. Even a short, clear agreement beats a friendly understanding.

Next step

Hiring well is a process, not luck. Build a shortlist of three, verify licence and insurance before you talk price, ask every candidate the same questions, compare bids on identical scope, screen for red flags, and sign a contract that pays only for completed work. Do that and you remove most of the risk from a build before the first delivery arrives. If you would rather have an experienced set of eyes vet the bids, sense-check the contract, or manage the trades on your behalf, talk to the team at ConstiCo — and where local licensing or contract law is involved, confirm the specifics with the relevant authority or a qualified professional.