How to Choose a Contractor: 5 Red Flags

The cheapest proposal can be the best fit. It can also be missing the work that makes the project usable. Before choosing a contractor, establish three things: who you are hiring, what that business agrees to deliver, and how changes or problems will be handled.

How do you compare contractors with different prices and reviews?

Separate evidence of experience from the price of the job. A newer business may have relevant experience under a previous employer; ask which projects the proposed supervisor personally managed. A long-established business may send a crew you have never met. Find out who will actually be on your project.

Read reviews for patterns you can investigate: communication during delays, handling of changes and response after payment. A review is one person's account, not a verified finding. Ask the contractor about the process behind a recurring concern, rather than treating a star rating as proof.

The FTC's hiring guidance recommends checking licensing and insurance, seeking multiple written estimates and contacting references. Verify requirements with the authority where the property is located; a license from another state is not a substitute.

Five red flags to resolve before you sign

1. The contracting business cannot be verified. Match the legal name on the proposal to the license or registration required locally. Ask for insurance evidence covering the work, and verify it with the issuing party.
2. The price has no identifiable scope. A total without quantities, products or exclusions leaves you unable to compare. Ask for the missing schedule before treating it as a complete offer.
3. You are pressured to pay before checking the agreement. Pause when an offer depends on immediate payment or you are discouraged from obtaining another estimate. A genuine scheduling constraint can still be explained in writing.
4. Responsibility for permits is dismissed without checking the work. Cosmetic work and structural or utility changes can follow different rules. Ask the local building department about the proposed scope and record who applies, pays and attends inspections.
5. No one will put changes and defect handling in writing. Establish who authorizes extra work, how price and schedule changes are approved, and whom you contact after completion.

What should both bids include?

Mark each line included, excluded, allowance or unresolved. Do not enter zero for an unresolved cost. A tile allowance, for example, needs an area and an explanation of whether it covers material alone or also freight, tax, trim and installation. The quote review tool can help organize those questions; the contractor must confirm the agreement.

Which reference questions tell you something useful?

Ask for a similar completed project and, where available, a client who needed a callback. With the client's permission, ask what changed after signing, how the change was approved and whether the contractor returned to resolve defects. Ask whether the same supervisor and subcontractors are proposed for your job.

A portfolio image establishes appearance. It does not establish final cost, waterproofing quality or responsibility for the work. Request enough context to understand which parts the contractor performed.

Who pays when a product or installation fails?

Put product supply and installation responsibilities side by side. If you buy the fixture and the contractor installs it, ask who checks it before installation and who handles removal and reinstallation if it is defective. A manufacturer's product warranty and a contractor's workmanship agreement may cover different expenses.

Do not assume that “bonded” guarantees completion or pays every complaint. California CSLB distinguishes a license bond from a contract bond. Ask which protection is being offered, its limits and its claim process.

California contracts: check the local rules

CSLB's home-improvement contract guidance describes written scope, payment terms and signed change orders. Its ordinary down-payment limit is the lesser of $1,000 or 10% of the contract price. Check applicable exceptions with CSLB; do not apply this California rule to projects in other states.

For the state-specific checks, use our California contractor checklist. For a kitchen project, carry the scope into the kitchen cost breakdown before requesting bids.

A request you can send to your shortlist

Please price the attached scope and list exclusions and allowances separately. Confirm the supervising person, permit responsibilities, payment milestones, change-order process and workmanship terms. Identify owner-purchased items and the costs that remain unresolved before I compare the proposals.

Sources and Methodology

Reviewed September 28, 2026 against the FTC and California CSLB pages linked above. The comparison sheet and reference questions are Renology editorial tools, not a contractor certification or investigation. We removed unsupported dispute statistics and generalized licensing, bond and tax-credit claims. See our editorial methodology.