How to Hire a Contractor: Tips, Checklist and Contract Essentials

Most home improvement projects don't fail because of bad materials or bad timing. They fail because of the wrong contractor. A bad hire means missed milestones, disputed invoices, unfinished work, and sometimes a legal fight to get your money back.

The good news: almost every hiring mistake is preventable. The contractors who cause problems leave a trail like complaints with the Better Business Bureau, missing licenses, vague bids, and pressure to skip the written contract. 

Once you know what to look for, spotting them is straightforward.

This guide walks you through every stage of hiring a contractor: finding candidates, reading bids, managing the project, and handling problems if they arise. By the end, you'll know exactly how to hire the right person for the job.

What Is a Contractor?

A contractor is a professional hired to complete a specific scope of work on a fixed or negotiated price. 

General contractors manage the full project and coordinate subcontractors. Specialty contractors, such as roofers, electricians, plumbers  handle specific trades. A remodeler focuses on residential renovation work.

The term independent contractor refers to the legal employment status: they work for themselves, not as your employee. 

That distinction matters for taxes and liability, but for most homeowners the practical question is simpler: are they licensed, insured, and experienced with your type of project?

Hire a professional for any work that requires building permits, involves structural changes, or carries safety risk if done incorrectly. 

Roof repairs, electrical upgrades, and additions all qualify. The cost of a qualified contractor is almost always lower than the cost of fixing unlicensed work.

How to Find and Vet Contractors

Start with referrals. A recommendation from a neighbor who recently completed a similar project is more reliable than any online listing. 

Ask specifically about communication, whether the project finished on schedule, and whether they would hire the same contractor again.

Beyond referrals, use review platforms like Yelp alongside the Better Business Bureau to check for complaints against a contractor. 

A pattern of unresolved complaints is a hard stop. One or two resolved complaints on an otherwise strong record is less concerning.

Vetting checklist before you invite anyone to bid:

• Confirm the contractor is licensed in your state. Look up the license number on your state licensing board's website.
• Request proof of insurance: general liability insurance and workers' compensation. Ask for a certificate of insurance directly from their insurer, not a document they hand you.
• Ask for references from satisfied clients on projects similar to yours. Call at least two.
• Search for the business name and owner name alongside terms like "complaint" or "lawsuit."

Never skip the license and insurance check. A contractor who cannot provide both is not worth your time regardless of how competitive their bid looks.

Comparing Bids and Choosing the Right Contractor

Get bids from several contractors before deciding. 

Three is a reasonable minimum for most projects. The goal is not to find the lowest price but to find the best value from a trustworthy contractor with a track record you can verify.

When you receive a bid, look for specificity. A detailed bid lists materials by brand and grade, labor broken out by task, and a clear payment schedule tied to milestones. 

A vague bid that bundles everything into one number is a warning sign: it gives you no basis for comparison and no protection if the scope of work becomes disputed later.

Compare bids on the same criteria: total cost, materials specified, timeline, payment terms, and what is explicitly excluded. 

A bid that comes in significantly lower than the others usually means something is missing. Ask what it is before you proceed.

The right contractor combines fair pricing with clear communication, verifiable references, and a willingness to put everything in writing.

Signing a Contract

Never start work without a written contract. Verbal agreements are not enforceable in most situations, and a handshake deal gives you nothing to stand on if something goes wrong.

A contract must include:

• Full names and contact details for both parties
• Detailed scope of work describing exactly what will and will not be done
• Start date, completion date, and key milestones
• Payment schedule tied to milestones, not calendar dates
• Who is responsible for pulling building permits
• Materials specified by brand, grade, and quantity where relevant
• Insurance coverage requirements and certificate of insurance details
• Warranty terms on workmanship
• Change order procedure: all changes must be documented and signed before work begins
• Dispute resolution clause specifying mediation, arbitration, or applicable state law
• Termination clause explaining how either party can cancel the contract and what notice is required

Read the fine print before signing. Pay attention to liability clauses, indemnity language, and any clause that limits the contractor's responsibility for defects. 

If the contract is complex or the project is large, a lawyer review is worth the cost.

Never sign a contract that lacks a scope of work, a payment schedule, or a dispute resolution clause. These are not optional.

Vetting Questions and Red Flags

Ask the contractor these questions before you commit:

• Are you licensed and insured? Can I see proof of insurance directly from your insurer?
• Will you pull the necessary building permits, or am I expected to?
• Who will be on site supervising the work daily?
• Can you provide references from satisfied clients on a similar project?
• What is your payment schedule and what deposit do you require?
• How do you handle change orders and unexpected issues?
• What warranty do you offer on workmanship?

Walk away if the contractor:

• Refuses to provide a license number or certificate of insurance
• Pressures you to skip the written contract or start immediately
• Demands a large upfront payment before any work begins (a deposit of 10 to 30 percent is standard; more than that is a red flag)
• Cannot provide references or offers only testimonials they control
• Has a pattern of complaints with no resolution

Selecting a contractor who checks every box on the list above is not overcautious. It is the minimum standard for protecting your home and your money.

Permits, Insurance, and Liability

Most structural, electrical, plumbing, and HVAC work requires building permits.

The permit process exists to ensure work is inspected and meets building codes. 

Skipping permits puts you at risk: unpermitted work can affect your homeowner's insurance, create problems when you sell, and leave you liable for injuries or damage.

Confirm who pulls the permits before signing the contract. In most cases the contractor is responsible. 

If a contractor suggests you pull permits yourself to save money, that is a red flag as  it shifts liability onto you.

Insurance to verify:

• General liability insurance covers property damage caused by the contractor during the project
• Workers' compensation covers injuries to the contractor's crew on your property

Without workers' compensation coverage, you could be liable for medical costs if a worker is injured on your property. 

Ask for the certificate of insurance and call the insurer to confirm the policy is active before work begins.

Working With a Contractor

Clear communication prevents most project problems. Designate one point of contact on your side and establish how often you expect progress updates. 

Put important decisions and change requests in writing. A text message thread works fine as documentation.

You should review invoices against the payment schedule in your contract before paying. Each milestone payment should correspond to completed, inspectable work. 

Withhold final payment until all work is finished, inspections are passed, and you have lien waivers from the contractor and any subcontractors.

Practical habits during the project:

• Document the site with photos before work starts and at each milestone
• Keep a file with the contract, all invoices, receipts, and change orders
• Attend scheduled inspections where possible
• Raise issues in writing as soon as they appear. Do not wait until the end

A contractor who communicates well and keeps to the milestone schedule is far easier to work with than one who disappears and resurfaces with excuses. 

Good project management from your side makes it harder for a contractor to cut corners unnoticed.

What to Do When Things Go Wrong

If a contractor fails to show up, misses milestones, or produces poor workmanship, start by documenting everything. 

Photographs, written notices, and a log of dates and conversations are your primary tools.

Review the contract before taking any action. Most contracts include a cure period. 

This is a set number of days the contractor has to fix a problem after receiving written notice. Send that notice in writing and keep a copy.

Steps to take if the contractor fails:

1. Document the problem with photos and written notice
2. Reference the relevant contract clause and give the cure period specified
3. If the contractor does not respond, consult a lawyer before withholding payment or terminating the contract
4. File a complaint against a contractor with the state licensing board
5. File a complaint with the Better Business Bureau and relevant review platforms
6. For financial disputes, consider mediation, arbitration, or small claims court depending on state law and the amount involved

Stop payments only after legal advice. Withholding payment without following the contract's termination procedure can expose you to a counterclaim. 

Horror stories about contractor disputes usually involve homeowners who skipped the written contract or paid too much upfront. Both are avoidable.

Conclusion

Hiring the right contractor comes down to verification and paperwork. Check the license, confirm the insurance, read the bid carefully, and sign a written contract with a clear scope of work and payment schedule before anyone picks up a tool.

The process takes more time upfront than simply hiring the first person who answers the phone. That time is worth it. A properly vetted contractor with a binding contract is how a home improvement project stays on budget, on schedule, and out of court.

Start with referrals, get several contractors to bid, and never let urgency push you past the basics. The right contractor will not pressure you to skip any of these steps.