Knowing how to hire a contractor comes down to one habit: make every contractor bid on the same written job. Write a short scope of work first, then verify each candidate's license with your state or local licensing agency, ask for proof of insurance, get at least three written quotes, compare them line by line, confirm who pulls the permit, and sign a written contract with payments tied to finished work. Most bad hires trace back to skipping the first step, not the last.
Licensing, permit and deposit rules differ by state, county and city, so wherever a rule matters, this guide points you to where your local answer lives instead of pretending one national rule exists.
How to hire a contractor, step by step
Here is the whole process in order. Each step gets its own section below.
- Write down the job before you call anyone.
- Decide which trade the job needs: a general contractor, or a licensed specialist such as an electrician, plumber or gas fitter.
- Collect names from people you trust, then verify each license with your state or local licensing agency.
- Ask for proof of insurance and confirm it with the insurer.
- Get at least three written quotes based on your written scope.
- Compare the quotes line by line, not by the bottom number.
- Confirm who pulls the permit, then sign a written contract with a payment schedule tied to completed work.
The order matters. If you collect quotes before you have a scope, you end up comparing three different jobs and calling it comparing prices.
Start with a written scope, before you call anyone
A scope of work is a plain description of what you want done, where, and finished to what standard. It does not need trade vocabulary. It needs to be specific enough that two contractors reading it would picture the same finished job.
Without one, each contractor fills the blanks with their own assumptions. One includes tearing out the old material and hauling it away; another assumes you will handle disposal. One prices a mid-range faucet; another prices the most basic one. None of them is being dishonest. They are answering different questions.
What a fair scope includes
- The goal in one sentence. For example: "Replace the damaged vanity and faucet in the upstairs bathroom."
- Location and access. Which room, stairs, parking, pets, and hours when work cannot happen.
- What comes out, and who disposes of it.
- Materials. The specific products you have chosen, or the grade you expect if the contractor supplies them.
- What "done" means. Patched and painted is a different job from patched and primed.
- What is not included, so nobody prices it by accident.
- Timing limits, such as a date the room must be usable again.
- Photos and rough measurements, so a first conversation can happen before a site visit.
A fair scope is fair to the contractor too, because a careful bidder can price the job honestly instead of padding for unknowns. If one contractor suggests a change after seeing the site, ask for it in writing and share it with the other bidders so everyone is still pricing the same job.
Which trade do you actually need?
A general contractor coordinates projects that involve several trades, such as a bathroom remodel, and usually hires subcontractors for the specialist parts. A single-trade job, like replacing a water heater or adding a circuit, often goes straight to that trade.
This is also where the do-it-yourself line sits. Work on electrical wiring, gas lines and gas appliance connections, plumbing supply and drain lines inside walls, and anything that changes the structure of the house belongs to licensed professionals: a licensed electrician, a licensed plumber or gas fitter, and, for any wall that may be load-bearing, a structural engineer who decides before anyone cuts. Whether a homeowner may legally do any part of this work varies by jurisdiction, so ask your local building department, not a forum.
If a general contractor's project includes those trades, ask who will do the electrical, plumbing and gas portions and whether each holds their own license. Get the names and verify them the same way.
Some calls are not hiring projects at all. If you smell gas, you are not collecting quotes; leave and follow our steps for what to do if you smell gas at the stove. For an active leak, stop the water first at your main water shut-off valve, then call a plumber. For a circuit that keeps tripping, it helps to read your breaker panel with the cover on so you can tell the electrician which breaker trips and what it feeds.
How to check a contractor's license and insurance
Contractor licensing is set by states, and sometimes by counties or cities. Some places license general contractors, some license only certain trades, and some use registration instead. So the real question is not "are they licensed?" but "are they licensed for this type of work, where I live?"
The FTC's consumer advice on avoiding home improvement scams, which we read on 2026-09-23, puts it plainly: consider only contractors who are licensed and insured, check with your state or county government to confirm the license, and ask the contractor for proof of insurance. In practice:
- Ask for the license number in writing, with the business's legal name.
- Look it up on the licensing agency's own website. Search your state's name plus "contractor license lookup" and make sure the result is a government site. Check that the name matches, the license is active, the classification covers your job, and whether any disciplinary actions are listed.
- Ask for a certificate of insurance and call the insurer or agent named on it to confirm the policy is current. Ask whether the crew is covered by workers' compensation, and check what your state requires.
- Check for complaints with your state attorney general or local consumer protection office.
- Call references for similar jobs. A license confirms legal standing, not good work. A recent customer with the same kind of job is the closest check on quality you will get.
Insurance matters because if an uninsured worker is hurt on your property, or damages your home, sorting out who pays can land on you.
Why three quotes tell three different stories
Three quotes, three different numbers, and no obvious way to tell who is right: this is where most homeowners get stuck. The FTC advises getting multiple estimates and says a written estimate should include a description of the work, the materials, a completion date and the price. Those four items are the minimum. The table below is how to read past them.
| What to compare | What to check on each quote | Why it moves the number |
|---|---|---|
| Scope | Does it match your written scope, item by item? | Missing items are the most common reason a quote looks cheap |
| Removal and disposal | Included, or left to you? | Tear-out and hauling are real labor and real fees |
| Materials | Named products, or an allowance? | An allowance is a placeholder; if your choice costs more, you pay the difference |
| Permits and inspections | Who applies, and is the fee included? | A quote that leaves this out is not comparable to one that includes it |
| Specialist trades | Who does electrical, plumbing or gas work, and are they licensed? | Licensed trade work is often priced separately |
| Surrounding repairs | Patching, painting and trim after the main job | "Patched" and "patched and painted" are different jobs |
| Timeline | Start date, duration, completion date | A vague schedule is a risk even when the price is fine |
| Payment schedule | Deposit size and what each later payment is tied to | Front-loaded payments shift risk to you |
| Warranty | What is covered, for how long, in writing | A verbal warranty is hard to enforce |
Allowances, exclusions and the suspiciously low bid
The lowest quote is not automatically the bargain. It often hides an exclusion, a low materials allowance, or a gap that returns later as a change order. The highest quote is not automatically padded either; it may be the only one that included disposal, the permit or the painting.
Ask every bidder the same question: "What is not included in this price?" If one quote is far from the others, ask that contractor to explain the difference in writing, then share the clarification with the rest. That keeps the comparison fair and usually shrinks the gap to something you can judge.
Permits: who pulls them and how to find out
Whether your job needs a permit depends on where you live and on what is being done. There is no single national rule, and anyone who says "that never needs a permit" is guessing about your town.
The reliable way to find out is your city or county building department. Look for "building permits" or "building and safety" on the local government website, describe the job in plain words, and ask three things: does it need a permit, which inspections are required, and who is allowed to apply.
On most hired jobs, the licensed contractor doing the work is the one who applies. The FTC lists a contractor who asks you to get the required building permits as a sign of a possible scam. A permit in the homeowner's name can leave you, rather than the contractor, answering to the building department if the work fails inspection, so ask how that works locally. Unpermitted work can also surface later, during a sale or an insurance claim.
The contract and the payment schedule
Get everything in writing before work starts. According to the FTC, the contract should include the contractor's name, address, phone number and license number, estimated start and completion dates, and any promises made during conversations. It should also state your right to cancel within three business days if you signed it in your home or somewhere other than the seller's permanent place of business.
The FTC also says not to pay the full amount up front, and notes that some states limit down payments. California is one example. The California Contractors State License Board's guide to home improvement contracts, which we read on 2026-09-23, says the down payment cannot be more than $1,000 or 10 percent of the contract price, whichever is less, that payments cannot exceed the value of work performed, and that any change to price or scope must be a written change order signed by both sides before the change. That is California's rule, not a national one, so ask your own state's licensing board or consumer protection office.
Wherever you live, these habits protect you:
- Tie each payment to a milestone you can see, such as cabinets installed, not a calendar date.
- Avoid paying in cash. Use a method that leaves a record.
- Put every change in writing, with its price, before the extra work begins.
- Ask about liens. In many states, a subcontractor or supplier your contractor fails to pay may be able to place a lien on your home even if you paid in full. Ask for lien releases (sometimes called lien waivers) as payments are made, and check how your state handles this.
- Hold the final payment until the work is finished, required inspections have passed, and you are satisfied, which is also the FTC's advice.
Red flags worth walking away from
The FTC's list of scam warning signs is short and worth memorizing. Be wary of a contractor who:
- Pressures you for an immediate decision.
- Says they have materials left over from another job.
- Wants payment for everything up front, or accepts only cash.
- Asks you to get the required building permits.
- Suggests you borrow money from a lender they know.
We would add anyone who will not put a license number, a quote or a contract in writing. A contractor confident in their work has no reason to avoid paper.
What this guide cannot tell you
Some answers only exist locally. We cannot tell you whether your specific job needs a permit, which license classification your state requires for it, or what a fair price is in your area. Those come from your building department, your state licensing agency and the quotes themselves.
A license is also not a quality guarantee. It shows a contractor meets the minimum legal requirements, while references, photos of past jobs and a clear contract fill the gap between "allowed to do it" and "does it well." For large projects, a lawyer's review of the contract before you sign is a reasonable step no checklist replaces.
The best time to find a reliable tradesperson is before you urgently need one. Hiring someone for the smaller scheduled jobs on your home maintenance checklist shows you how they communicate, quote and clean up while the stakes are low.
Frequently asked questions
How many quotes should I get from contractors?
The FTC advises getting multiple written estimates, and three is a common working number. What matters more is that every quote is based on the same written scope, so the numbers are actually comparable.
Should the contractor or the homeowner get the building permit?
On most hired jobs, the licensed contractor doing the work should apply, and the FTC treats a contractor who asks you to pull the permit as a warning sign. Rules differ by city and county, so confirm with your local building department.
How much of a deposit should I pay a contractor?
There is no single national figure. The FTC says not to pay the full amount up front and notes that some states cap down payments. California, for example, limits the down payment on home improvement contracts to $1,000 or 10 percent of the price, whichever is less.
How do I check if a contractor is licensed?
Ask for the license number and the business's legal name in writing, then look it up on your state or local licensing agency's website. Confirm the license is active, the name matches, and the classification covers your job.
Is the cheapest contractor quote a bad sign?
Not always, but ask what it leaves out. A low quote often excludes disposal, permits, painting or a realistic materials allowance, and those gaps can return as change orders.
