Hiring
How to Vet a Contractor and Spot Estimate Red Flags
“What should I check before signing?”
By Home Improvements · Updated November 2, 2026 · 6 min read
The short answer
Key takeaways
- Check the exact business named on the contract.
- Verify the applicable license with the official authority.
- Ask the insurer about current coverage.
- Never treat a referral as a guarantee of workmanship.
Start with identity and applicable credentials
Match the legal business name, address and contact details across the proposal, license and contract. Licensing rules vary by trade and location. Use the official state or county lookup rather than relying on a logo or a screenshot supplied by the bidder.
Ask for proof of insurance and confirm coverage with the insurer. Whether a specific loss is covered depends on the policy, so do not treat a certificate as a guarantee.
Ask references about work like yours
Ask for recent projects with similar scope. Ask whether the final price matched the agreed scope, how changes were handled, whether cleanup was completed and how the contractor responded to issues.
Read both favorable and unfavorable reviews critically. One review cannot establish the quality of the next job.
Recognize estimate red flags
The FTC identifies pressure for an immediate decision, demands for full payment upfront, cash-only demands and contractor-arranged loan pressure as warning signs. A warning sign is a reason to stop and investigate, not proof of a crime.
- Missing materials or quantities
- Blank contract spaces
- No clear completion or change-order terms
- Verbal warranty promises without written coverage
- A large unexplained gap between comparable estimates
Keep the decision in writing
Get the scope, schedule, payment milestones and warranty terms before signing. Check local consumer protections and cancellation rights rather than assuming one national rule fits every contract.
If the contractor will not let you review the documents or verify the business, pause the transaction. Do not send personal documents or a deposit just to hold a pressured offer.
Sources and further reading
General planning information, not an inspection, contractor quote or guarantee of savings. Home Improvements provides guidance and optional professional connections. Independent contractors perform the work. Check local requirements and verify credentials directly.
Common questions
Quick answers homeowners ask next.
01Does a license guarantee good work?
No. A current applicable license is one verification step, not a workmanship guarantee. Check references, scope and contract terms too.
02Is a low bid always a scam?
No. Ask for an explanation of price differences and compare equivalent scope. Avoid accusing a contractor without evidence.
Where to go next