Installers license application for billerica

Washington State requires all construction contractors to register with L&I. State law also requires construction contractors to be bonded and insured to protect the public.

Once registered, contractors can bid, advertise, and perform construction work. This can include constructing, remodeling, repairing and demolishing buildings, roads and other real property. If you are a new construction contractor, or thinking about getting registered, watch the Contractor Overview module, to better understand the requirements.

There are two classifications of construction contractors in the state:

Working without registering as a contractor in Washington carries substantial penalties and fines.

Contractor Specialties

L&I regulates 63 specialties that each require contractor registration. These specialties include roofing, painting, HVAC, tree removal, mobile home set-up, and dozens more.

How to register

To register with L&I as a contractor, you must:

The order you complete these steps can affect how quickly you can complete the registration process.

Getting started

For the fastest and simplest registration process, we recommend this three-step process:

Step 1: Decide on your business structure and name

If you are unsure which business structure you should use, see our guide, Applying for Your Washington Business License: A Step-by-Step Guide (F101-079-000), or visit business.wa.gov for in-depth information on starting and structuring your business.

Step 2: Purchase your surety bond and insurance

To register as a contractor, you will need to purchase: