Short answer
Search the contractor's business name or registration number in Washington L&I's free Verify a Contractor tool (secure.lni.wa.gov/verify). Confirm the registration is active, the bond is in force ($30,000 for general contractors, $15,000 for specialty contractors like concrete), and liability insurance is on file. Check for any lawsuits against the bond.
| Where to check | L&I Verify a Contractor (free)[1] |
|---|---|
| Bond, general contractor | $30,000[2] |
| Bond, specialty contractor | $15,000[2] |
| Liability insurance minimum | $200,000 public liability + $50,000 property damage, or $250,000 combined[2] |
| Registration number on ads and bids | required by L&I[2] |
| Active concrete-specialty registrations we list | 642[3] |
Step by step
- Ask the contractor for their Washington registration number. It should appear on their bids and ads.
- Open L&I Verify a Contractor and search by number or business name.
- Check that the status is active and the specialty fits your job (for example, concrete).
- Look at the bond and insurance sections: both should be current, not cancelled or expired.
- Review lawsuits against the bond, workers' comp status and any violations.
- Make sure the business name on the contract matches the registration.
Red flags
- No registration number on the bid, or a number that doesn't match the business name.
- Pressure to pay most of the price in cash, up front.
- A cancelled bond or expired insurance in the L&I record.
Find registered concrete contractors
Our directory lists 642 concrete contractors with active L&I registrations, along with bond and insurance status. Browse by city or request quotes and we'll match you with up to three.
Get free quotes from licensed contractors
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Frequently asked questions
Does Washington require contractors to be licensed?
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Washington uses contractor registration through L&I. Registered contractors must carry a bond and liability insurance, and must include their registration number when they advertise, bid or offer to do work.
What does a concrete contractor's bond cover?
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The bond gives homeowners a way to recover money if a registered contractor fails to meet obligations, up to the bond amount. Specialty contractors such as concrete carry a $15,000 bond. Large claims can exceed it, so check references and the scope too.
Are all contractors on this site registered?
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Yes. Every listing comes from L&I's public data and had an active registration with a concrete specialty when we last updated the directory. Registrations can lapse, so verify on L&I before you sign.
Sources
- [1]Washington State Department of Labor & Industries, Verify a Contractor, Tradesperson or Business (live tool)
- [2]Washington State Department of Labor & Industries, Register as a Contractor (checked October 5, 2026)
- [3]data.wa.gov (Washington State open data), L&I Contractor License Data (refreshed with each site update)
Prices are national ranges published by the sources above, not quotes. Your price depends on size, access, site preparation and local labor rates. The only way to know is to compare written quotes.