How to Hire a Contractor: License Verification, Insurance, References and Red Flags

To hire a contractor safely, verify their license through your state or local licensing authority, confirm their insurance is active by calling the insurer directly, check references by talking to real past customers, and compare at least three written bids before you sign anything. Do this before any money changes hands. Permit rules, license requirements, and license lookup tools are set by your state or local government, so always confirm the exact steps with your local building department or licensing board.

Stop First If the Project Involves These Hazards

Before you even think about hiring, know what work is off-limits for casual bidding or DIY. Structural changes, electrical work, gas lines, suspected asbestos or lead, mold beyond a small surface area, and active leaks near electrical systems all require a licensed, qualified professional. Do not let a contractor talk you out of required permits or inspections for this type of work. If a bid or a worker suggests skipping permits on hazardous work, treat that as a serious warning sign, not a cost-saving tip.

Step 1: Verify the License

Many states and cities require a license for home improvement work, though the rules and dollar thresholds vary by location. Contact your state licensing board, state attorney general’s office, or local building department to find out what applies to your project. Most states offer a free online license lookup tool.

Ask the contractor for their license number before you check anything.
Search your state’s official licensing board website, not a general search engine result, to confirm the license is current.
Check whether the license has any disciplinary history or complaints on file.
Confirm the license type matches your project, since general contracting and specialty trades like electrical or roofing are often licensed separately.
If your area does not require a license for this type of job, ask your local building department what registration or permit rules still apply.

Step 2: Verify the Insurance

A contractor’s insurance protects you if a worker is hurt on your property or if the contractor damages your home. Contractors should carry personal liability coverage, workers’ compensation coverage, and property damage coverage. Ask for copies of current insurance certificates, then call the insurance company listed to confirm the policy is active and covers the dates of your project.

Do not accept an old certificate as proof; call the insurer to verify it is still current.
If the contractor plans to use subcontractors, confirm those subcontractors also carry current insurance and any required licenses.
Ask your own homeowners insurance agent what your policy covers if a worker is hurt at your home.

Step 3: Check References the Right Way

A contractor should be able to give you the names, addresses, and phone numbers of at least three past clients with projects like yours. Call them and ask specific questions instead of general ones.

How long ago was the project, and was it completed on time?
Were there any unexpected costs along the way?
Did workers show up on time and clean up after finishing each day?
Were you satisfied with the finished work?
If possible, ask to visit a job the contractor has in progress.

Step 4: Compare Bids the Right Way

Get written estimates from at least three contractors before deciding. Do not automatically choose the lowest bidder; ask for an explanation if one bid is far lower than the others. A big gap can mean missing scope, unlicensed labor, or lower-grade materials. When you lay the bids side by side, check each one for:

A detailed scope of work. Vague bids hide missing steps or materials that get added later as extra costs.
Who pulls the permit. The named permit holder is accountable to your local building department. Be cautious of any contractor who asks you to pull the permit yourself.
The payment schedule. Try to limit your down payment and tie later payments to completed, defined amounts of work.
A start and completion timeframe. A written timeframe gives you a basis for follow-up if the project stalls.
Change-order terms. This spells out how price and schedule changes are handled if problems are found mid-project.
Warranty coverage on labor and materials. Ask who is honoring each warranty (contractor, distributor, or manufacturer) and for how long.

Contractor Fraud Red Flags

Knocks on your door for business or offers a discount for referring other customers.
Pressures you for an immediate decision instead of letting you compare bids.
Only accepts cash, asks for full payment up front, or wants to arrange financing through a lender they know.
Tells you to pull the required building permits yourself.
Offers a “demonstration” job, a lifetime warranty, or a long-term guarantee that sounds too good to check.
Has no business number listed in the local phone directory or online.
Just happens to have materials left over from a previous job.
Gives you a contract with blank sections to “fill in later,” or asks you to sign a document you have not fully read.

Get a Written Contract

Contract requirements vary by state, but ask for a written agreement even if your state does not require one. Before you sign, make sure the contract includes:

The contractor’s name, address, phone number, and license number, if required.
An estimated start and completion date.
The payment schedule for the contractor, subcontractors, and suppliers.
The contractor’s obligation to obtain all necessary permits.
How change orders will be handled.
A detailed list of materials, including who chooses any items decided later and how much money is budgeted for them.
Warranty information, including who is responsible for honoring it and for how long.
Your written right to cancel within three business days if you signed the contract in your home or somewhere other than the contractor’s permanent place of business.

Cost and Evidence Limits

Project costs depend on your location, the scope of work, material choices, and site conditions, so this guide does not list prices, typical costs, or savings estimates. Use your own written bids for cost planning, and treat any general online cost figure as a rough starting point only, not a quote for your specific home.

If Something Goes Wrong

Try to resolve the problem with the contractor first. Put your concern in writing and send it by certified mail with a return receipt so you have proof it was received. If that does not work, gather your contract, estimates, receipts, and any written communication, then contact your state attorney general’s office or local consumer protection office. You can also file a complaint with the Federal Trade Commission, and review general complaint steps, including how to write a complaint letter, at USA.gov’s consumer complaint guide.

Frequently Asked Questions

Do I need a license check for every home project?

Not always. License and permit requirements depend on the type of work and your location. Contact your local building department or state licensing board to find out what applies before you hire.

Is the lowest bid usually the safest choice?

No. A bid that is much lower than the others can mean missing scope, unlicensed labor, or corners cut on materials. Ask the contractor to explain a low price before you accept it.

What should I do if a contractor asks for full payment upfront?

Treat this as a red flag. Try to limit your down payment and tie the rest of the payments to completed work. Ask your state or local consumer protection office what payment limits, if any, apply in your area.

Can I do the hazardous parts of a project myself to save money?

Structural, electrical, gas, and hazardous-material work should go to a licensed professional. Check with your local building department about what specifically requires a permit and licensed labor in your area before starting any work yourself.

Safety Disclaimer

HomeRemodelingAndRepairs.net provides general educational information. It is not a substitute for advice from a licensed contractor, attorney, insurance agent, or your local building department. Licensing rules, permit requirements, and consumer protection processes vary by state and locality. Always confirm current requirements with the correct local authority before hiring a contractor or starting a project.