12 Contractor Bid Red Flags to Catch Before You Sign (2026)

Bad renovations rarely start with bad work. They start with a bid that was too vague to hold anyone to, signed because the price felt right and the crew could start Monday. Here's what to look for while it's still just paper.

Red Flags in the Document Itself

• One-line scope. 'Remodel bathroom — $18,500' is not a scope, it's a wish.
• No allowances stated. You can't compare bids or shop finishes without them.
• No exclusions section. Everything unlisted becomes a change order later.
• No start and completion dates, even approximate ones.
• No license number, no certificate of insurance, no lien-waiver language.
• Change orders described as 'we'll work it out' rather than written and priced.

Red Flags in the Money

• A deposit above roughly 30%, or any request for full payment up front.
• Cash-only pricing or a discount for paying outside the books.
• No retainage — nothing held back until the punch list is finished.
• A total more than about 18% below the other bids with no explanation.

Red Flags in How They Sell

• Today-only pricing or pressure to sign before you've read it.
• Unwillingness to give recent local references from the same type of job.

The Questions That Clear Most of This Up

Ask who is physically on site each day, and who supervises. Ask what happens if the subfloor is rotten. Ask for the last three addresses they finished this exact scope at. Ask how a change order gets priced and approved. A good contractor answers these in a couple of minutes; a risky one gets uncomfortable.

The cheapest bid and the most expensive bid are both telling you something. Your job is to find out what.

Verify the Basics Yourself

Check the license on your state board's site, call the insurer to confirm the policy is active through your project window, and search the business name with your county court records and the BBB. Fifteen minutes here has saved a lot of people five figures.

Frequently Asked Questions

Is a large deposit ever legitimate?

Yes — for custom cabinets, special-order windows or a slab that must be paid at order. It should be tied to a specific purchase, documented, and not a general 'to get started' payment.

What if the contractor won't put it in writing?

Then you don't have a contractor, you have a conversation. Walk.

How do I protect myself from liens?

Require conditional lien waivers from the GC and any major subs with each progress payment, and a final unconditional waiver with the last check.