Licensed window replacement contractors in Washington

What Washington requires of contractors

• Every contractor must register with L&I. Advertising, bidding or working as a contractor without a registration, or while it is suspended or revoked, is a gross misdemeanor. (Source: RCW 18.27.020: Registration required)
• To register, a contractor files a surety bond (L&I also accepts an assigned savings account): $30,000 for a general contractor or $15,000 for a specialty contractor. If the bond is cancelled, the registration is automatically suspended until a new bond or reinstatement notice is filed and approved. (Source: RCW 18.27.040: Bond or other security required; Register as a Contractor)
• Contractors must also carry general liability insurance of $200,000 public liability and $50,000 property damage, or a $250,000 combined single limit. (Source: Register as a Contractor)
• General contractors can perform most types of construction work and hire subcontractors. Specialty contractors can only perform work in the specialty they are registered in and cannot hire subcontractors. That is why each listing shows its license class. (Source: Register as a Contractor)
• Contractors must include their registration number when they advertise, bid or offer to do work, including on business cards, internet ads, estimates and bid proposals. (Source: Register as a Contractor)
• For work on a home of four or fewer units with a bid or contract price of $1,000 or more, the contractor must give you a disclosure statement (the Notice to Customer) before starting work. It lists the registration number and bond, and explains that suppliers or subcontractors who go unpaid can put a lien on your property. (Source: RCW 18.27.114: Disclosure statement required)

L&I's advice before you hire

• Get at least 3 written bids and compare them carefully. (Source: Hiring a Contractor)
• Get references, stay alert for scams, and get a written contract you understand. (Source: Hiring a Contractor)
• A contract should include, at a minimum: the price including sales tax, payment terms and completion date, permit fees if any, the specific work, the materials, major suppliers and subcontractors, and warranties and the change-order process. (Source: Hire Smart Step-by-Step)
• Pay as phases of the work are completed rather than on a calendar schedule, and avoid paying in full until all work is done. (Source: Hire Smart Step-by-Step)
• On projects over $6,000, consider asking the contractor to post a performance bond. (Source: Hire Smart Step-by-Step)
• L&I lists these warning signs: credentials or references that can't be verified, a special price only if you sign today, cash only or large deposits up front, no written contract or complete bid, and asking you to get the building permit. (Source: Hire Smart Step-by-Step)

If something goes wrong

• The contractor's bond can pay valid claims, but the required disclosure statement warns that it might not be enough to cover a claim and that it covers all of the contractor's work, not just yours. (Source: RCW 18.27.114: Disclosure statement required)
• A homeowner's claim against the bond for breach of contract must be filed in superior court within two years of the work being substantially completed or abandoned. (Source: RCW 18.27.040: Bond or other security required)
• L&I's Homeowner Recovery Fund can pay owner-occupants of homes with four or fewer units (condominiums excluded) up to $25,000, depending on available funds, after a superior court judgment against a registered contractor. The judgment must be ordered after July 1, 2026, and you apply within 90 days after the case ends. (Source: Homeowner Recovery Fund)

Where these listings come from

Listings for Washington come from the L&I Contractor License Data - General dataset published by the Washington State Department of Labor & Industries. data.wa.gov lists this dataset as updated three times a day. We last checked it on Sep 29, 2026. See how we verify listings.