How to Hire a Contractor: Ten Rules That Prevent Regret
Ten rules for finding, checking and managing a contractor, written for homeowners who want the work done once and paid for once.
Define the job before you call anyone
Write a one-page scope: what will be built, what will be removed, which fixtures you will supply and what finish standard you expect. Include access, parking, working hours and who clears waste. A clear scope lets contractors price the same work, which is the only way to compare bids honestly. If you cannot describe the job, pay a designer or surveyor for drawings before you ask for prices.
Decide your budget and contingency before conversations begin. A sensible reserve is 10 to 20 percent for unexpected structural or service work. The Consumer Financial Protection Bureau has guidance on home improvement financing and contracts. Our contractor section covers vetting and contract stages in more detail.
Ask for licence, insurance and references
Licensing rules vary by place, so check the requirement for your area and verify the number directly with the issuing authority. Ask for a certificate of insurance showing general liability and workers compensation, and call the insurer to confirm it is current. A contractor who cannot produce these documents is not a bargain, regardless of the quote. Uninsured workers on your property can become your liability.
Ask for three recent references from jobs similar to yours, not just the best photos on a website. Call the references and ask what went wrong as well as what went right. A good contractor will have a story about a delay or a surprise and can explain how it was handled. Visit one completed job if the owner agrees; workmanship looks different in person.
Compare itemised bids
Ask every bidder to break the price into labour, materials, permits, waste removal and contingency. Check that each bid includes the same scope; a low number often excludes preparation, making good or building control fees. Compare the exclusions carefully. If one bid is 30 percent below the others, find out why before you celebrate. It may be a different specification, an uninsured crew or a price that will grow through variations.
Do not automatically choose the cheapest or the fastest. Look at the quality of the breakdown, the proposed schedule and the contractor's willingness to answer questions. A detailed bid with clear assumptions is easier to manage and less likely to produce arguments later. Keep every bid in writing, including revised versions.
You are not hiring a price; you are hiring a process that has to survive surprises.
Put the agreement in writing
The contract should name the parties, the address, the scope, the price, the schedule and the payment stages. It should describe materials and finishes, who obtains permits, how changes are priced and what happens if work stops. Include a start date and a completion date, plus a process for extensions. Verbal promises are not a contract, even if they are sincere.
Check the cancellation and dispute clauses before signing. A fair contract gives both sides a way to end the job without hostage payments. Ask a lawyer to review anything above a minor repair if the wording is unclear. The Small Business Administration explains some of the employment rules contractors must follow; a professional should be able to show they understand them too.
Manage the money and the schedule
Never pay the full job upfront. Use a deposit for materials, then stage payments tied to completed milestones. Keep a final payment of at least 5 to 10 percent until the work is finished, inspected and the snag list is closed. Pay by a traceable method and get a receipt every time. Cash payments without records make disputes impossible to resolve.
Ask for a weekly update and inspect the work at each stage, not only at the end. Take photos before walls are closed and services are covered. If a change is needed, agree the price and time effect in writing before the work proceeds. A written change order prevents a small adjustment from becoming a large surprise on the final invoice.
Handle delays and defects without a fight
Delays happen. The question is whether they are communicated early and whether the contract says what they cost. Put your concerns in writing, keep a dated log and ask for a revised schedule. If work is defective, describe the defect and the standard it fails to meet, then allow a reasonable time to fix it. Stop payments only for the disputed stage, not the whole job, unless the contract or law allows otherwise.
If the relationship breaks down, do not let the contractor back in without a written agreement about unfinished work and access. Get a second opinion from an independent surveyor or trade professional. Most problems are cheaper to resolve than to litigate, but a clear paper trail gives you options if a friendly solution fails.
How we built these rules
We reviewed consumer protection guidance, standard renovation contracts and interviews with contractors, project managers and homeowners who had completed recent work. The ten rules reflect the failures that appear most often: unclear scope, missing insurance, underpriced bids, front-loaded payments and changes agreed verbally.
No checklist replaces local advice. Check the rules in your jurisdiction and use a qualified professional for structural, electrical and gas work. If your project is still at the planning stage, read our contractor red flags guide before you sign anything.