"Licensed and insured" is printed on nearly every landscaping ad in Seattle. It's also one of the easiest claims to make and one of the least-checked before a homeowner signs a contract. Here's what those words actually mean in Washington state, and how to verify them yourself in a few minutes — not just take a firm's word for it.
Contractor registration (not the same as a "license" in some other states)
Washington requires anyone doing construction work, including most landscape construction and hardscape installation, to be registered with the Department of Labor & Industries (L&I). This isn't a skills-based license like a plumber or electrician holds — it's closer to a registration that confirms bonding and insurance are in place. That distinction matters: registration is a baseline, not a guarantee of quality, but a firm that isn't registered at all is a real red flag.
How to check: L&I maintains a free public contractor lookup tool. Search by business name or registration number (usually on their estimate or business card) and confirm the registration is active, not expired or suspended.
What that registration requires
- A surety bond — a minimum financial guarantee that gives you limited recourse if the contractor doesn't complete work or pay subcontractors/suppliers. Note that bond amounts are often modest relative to a large project's total cost, so don't treat this as full protection.
- General liability insurance — covers property damage or injury caused during the work. Ask for a certificate of insurance directly from the contractor (not just a verbal confirmation) with adequate coverage limits for a project of your size.
Landscape architects are different from contractors
If your project involves a licensed landscape architect (common for larger design work, grading, or anything touching stormwater/drainage design), that's a separate, distinct license issued through the Washington State Department of Licensing — different from contractor registration. Design-build firms often have both a licensed architect on staff and a registered contractor entity that performs the build.
Worker's compensation
If a firm has employees (rather than only subcontracting to other registered contractors), confirm they carry worker's compensation coverage through L&I. This protects you from liability if a worker is injured on your property during the project.
A five-minute verification routine
Before signing anything: look up the registration number on L&I's site, confirm it's active, request a certificate of insurance, and ask for two references from projects completed in the last two years. Any legitimate firm should have all of this ready without hesitation.
Beyond the paperwork: what else to verify
- References from recent, comparable projects — not just a portfolio of photos, but people you can actually call.
- A written scope of work that specifies materials, dimensions, and what's explicitly excluded.
- A clear payment schedule tied to project milestones, not a large deposit upfront relative to the project size.
- Who pulls permits and whether that's included in the bid — a common area where scope gets murky.
Next steps
Our interactive hiring checklist walks through this in order and saves your progress as you go. When you're ready to reach out to firms, every listing in our directory is vetted for design credibility — but we'd still encourage you to verify registration and insurance directly before signing.
