How to Hire a Contractor: Quotes, Contracts and Red Flags

Hire a contractor by getting 3 written, itemized quotes from licensed, insured pros, checking at least 3 recent references and their license status, and signing a detailed contract before any work starts or money changes hands. Never hire on a single verbal quote, never pay more than 10 to 15 percent up front, and never let work begin without a written scope, schedule, and payment plan. Price the job first with the Square Footage Calculator, check realistic budgets in the kitchen remodel cost guide and the bathroom remodel cost guide, and read how to budget a home renovation before you call anyone.

Start with scope, not with quotes

Write a one-page scope of work before you contact any contractor, because a vague brief produces quotes you cannot compare. List exactly what gets done and what does not: rooms, dimensions, materials, brands or quality levels, finishes, fixtures, and who supplies what. Measure the space yourself first — the Square Footage Calculator gives you the area figures contractors will price from — and note anything unusual, such as uneven floors, old wiring, or limited access. A contractor who quotes from a walk-through and a clear scope is pricing the same job as the next one; a contractor who quotes from "redo the bathroom" is guessing, and the guess always grows later.

Decide your budget range and your must-haves versus nice-to-haves before the first meeting, and keep the nice-to-haves as priced options rather than folding them into the base quote. That way, when quotes come back 20 to 40 percent apart — which is normal — you can see whether the difference is scope, materials, labor rates, or overhead, instead of wondering whether someone is padding the price. Get the scope in writing and send the same document to every bidder; it is the single most effective way to keep a project honest.

Vet licenses, insurance, and references before price

A legitimate contractor holds a current license where your state or locality requires one, carries general liability insurance of at least $1 million per occurrence, and carries workers' compensation coverage for every worker on your property. Ask for the license number and the insurance certificates, then verify them: check the license with your state licensing board and call the insurer to confirm the policy is active, because a certificate printed from a home computer proves nothing. If a worker is injured on your property and the contractor has no workers' compensation, you can become the liable party — this is the most expensive shortcut in home improvement.

Ask for 3 recent references from jobs similar in size and type to yours, completed within the last 12 months, and actually call them. Ask four questions: did the job finish on the promised schedule, did the final price match the quote (and if not, why), how did the contractor handle problems, and would you hire them again? Then drive past one finished job if you can — workmanship shows in the details, like straight tile lines and clean caulk joints. Also check for complaints with your state consumer protection office and the Better Business Bureau, and be wary of a contractor with no verifiable track record at all, no matter how convincing the sales pitch.

Compare quotes line by line, and distrust the outlier

Compare quotes on identical scope, line by line, not on the bottom-line total. A proper quote itemizes labor, materials, permits, disposal, and subcontractor work (plumbing, electrical, tile), and names the products — for example, "30-year architectural shingles" rather than "new roof." If one quote is 30 percent below the others, something is missing: cheaper materials, skipped permits, uninsured labor, or a change-order strategy where the low bid wins the job and extras recover the profit. The cheapest quote is very often the most expensive project.

Watch for the classic red flags during quoting. A contractor who demands full payment up front, or a deposit above 20 percent, is either cash-strapped or planning to disappear. One who offers a "today only" discount, refuses to put the quote in writing, wants the job done without permits to "save you money," or asks you to pull the permit yourself is shifting risk onto you. A contractor who cannot give a written start date, a realistic duration, and a payment schedule tied to completed milestones is not ready to run your job. Walk away from any of these, however friendly the salesperson.

The contract: what must be in writing

Never start work on a handshake or a one-page estimate. A solid contract includes the full legal names and addresses of both parties, the contractor's license number, a detailed scope of work with materials and brands, the total price and exactly what it includes, a payment schedule tied to milestones (for example, 10 percent at signing, 25 percent at rough-in, 25 percent at drywall, 30 percent at trim and fixtures, 10 percent at final walk-through), start and completion dates, and a change-order procedure stating that no extra work is done without a signed written change order with its price. It should also state who obtains permits, who handles inspections, how the site will be protected and cleaned daily, and what warranty applies — 1 year on workmanship is the minimum to expect, with manufacturer warranties on materials on top.

Read the fine print on three clauses in particular. First, the cancellation clause: most states give you 3 business days to cancel a contract signed at home. Second, the dispute clause: mediation before litigation saves both sides thousands. Third, the lien clause: require lien releases from the contractor and every subcontractor and supplier as each payment is made, so a supplier the contractor failed to pay cannot later place a lien on your home. If the contract is vague on any of these points, ask for the language to be added before you sign — a reputable contractor expects this conversation and welcomes it.

Managing the job and paying safely

Pay by milestone, never by calendar date, and hold back the final 10 percent until the final walk-through is complete and every punch-list item is fixed. Photograph the work at each stage — rough framing, plumbing and wiring before walls close, tile setting — because once drywall goes up, defects hide for years. Keep a simple job file: the contract, every change order, every receipt, and dated photos. If something goes wrong, this file is what turns a dispute into a resolution.

Communicate in writing. Confirm verbal agreements by email the same day ("Just confirming we agreed the tile will be the 12 by 24 in porcelain at $4.20 per sq ft, not the ceramic originally quoted"), and never approve a change order verbally on site. Expect a good contractor to surface problems early — a rotted subfloor, a code issue — with a price before fixing them; a contractor who fixes first and bills later is running an open tab on your house. Finally, never make the last payment until permits are finaled, inspections are passed, warranties and manuals are handed over, and the site is clean. The day the final check clears is the day your leverage ends, so use it while you still have it.

Permits, inspections, and the final walk-through

Permits are not bureaucracy for its own sake — they are the only independent check that structural, electrical, and plumbing work meets code, and unpermitted work is a problem at sale time, when an appraiser or buyer asks for the permit record and finds nothing. Confirm in the contract who pulls permits (it should be the contractor), and confirm that inspections are scheduled at each required stage: rough framing, rough plumbing and electrical, insulation, and final. Never let a contractor close up walls before the rough inspection passes, because reopening finished walls to fix a failed inspection costs far more than waiting a day for the inspector.

Run the final walk-through in daylight with the punch list in hand, and test everything: every outlet, every faucet, every door latch, every window lock, every light switch. Flush toilets, run showers, and check for leaks under every sink. Note every defect, however small — a paint drip, a misaligned cabinet door, a grout gap — and do not sign off or release the final payment until each item is fixed or a written date is set for fixing it. Collect warranties, manuals, paint colors, and tile batch numbers in a folder before the crew leaves; in two years, when a faucet cartridge fails or a wall needs touching up, that folder is worth more than the contractor's phone number. If the contractor offers an extended warranty beyond the standard 1 year, get its terms in writing too — what it covers, who honors it, and whether it transfers to a future buyer — because a verbal warranty promise is worth nothing when the company changes hands or closes.