Roofing Contractors Association of Washington
- A trade association for commercial and residential roofing contractors, manufacturers, distributors, and industry professionals.
- http://www.rcaw.com/

ChoreSquad.com
- Directory of home improvement companies in the State of Washington. Includes company's logo, web site and short description of their services.
- http://www.choresquad.com/

AIA Washington State Council
- Washington state government architectural issues and links, links to architecture related sites and to state AIA chapter sites.
- http://www.aiawa.org/

Washington State Floor Covering Association
- Their mission is to educate, inform and unify the floor covering industry in the state.
- http://www.wsfca.org/

The Jacob Flooring Directory of Washington State
- A directory of flooring dealers for the state
- http://www.jacobflooringwashington.com/

Lydig Construction Inc.
- Commercial contractors and construction management company specializing in industrial, building and concrete projects, with offices in Bellevue and Spokane.
- http://www.lydig.com/

Northwest Architectural Company
- A firm of over 120 professionals led by 17 principal architects with offices in Seattle and Spokane.
- http://www.nwarchco.com/

Washington State House Cleaners Association
- An association of companies providing house cleaning, maid service and housekeeping services.
- http://www.wsha.com/

Dependable Building Maintenance
- Building maintenance and janitorial service with offices in Bellevue, Everett, Kelso, Longview, Redmond, Seattle, Silverdale, Tacoma, Vancouver and Portland, Oregon.
- http://www.dbm1.com/

Southwest Washington Chapter - NECA
- Serves six southwest Washington counties. Member-firms are electrical contractors serving many communities in the South Puget Sound area.
- http://www.necasww.org/

Washington Asphalt Pavement Association - WAPA
- Represents hot mix asphalt producers within the state. Features pavement guides, conferences and scholarships.
- http://www.asphaltwa.com/

Thermall Heating & Cooling
- Install, maintain, and repair residential climate control systems in new and older homes. Offices in Woodinville and Ellensburg.
- http://www.thermallheating.com/

TNJ Resource.com - Washington State Construction Directory
- Directory includes architects, engineers, contractors, construction supplies, home furnishings and planning/building departments.
- http://www.tnjresource.com/

National Electrical Contractors Association - NECA - Cascade Chapter
- Organization for electrical contractors located in or traveling to northwestern and north central Washington.
- http://www.necacascade.org

Aztech Electric, Inc.
- Northwest electrical contractor company founded in 1968. Links and information on services, projects, and affiliations. Offices in Spokane and Woodinville.
- http://www.aztech-electric.com/