Balderston Associates provides comprehensive third-party verification, energy modeling, code compliance, training, and other sustainable building technical expertise. We participate in the following third-party certification programs: LEED, Built Green, Passive House (PHIUS+), ENERGY STAR, Net Zero Homes, HERS, and more. We work with builders, developers, non-profits, and homeowners to help provide sustainable building technical expertise for projects in WA.

Crescent Builds is a Seattle-based general contracting firm focused on providing quality home building and remodeling solutions.

ming | architecture and design was founded by Grace Huang in 2001 to specialize in sustainable and healthy home building practices. Our projects are located throughout the Puget Sound region and our work has been recognized by green building programs and publications. Our custom home projects range from small remodels to whole new houses. We think of ourselves as the owners' coach and guide in the building process, and approach the house as a tailor would a well-fitted garment - the house needs to look and feel great for those living in it.

475's mission is to supply essential materials, building components, and knowledge that will lead a transformation of the North American construction industry toward making durable high-performance, Passive House and zero-energy buildings.

The Low Income Housing Institute develops, owns and operates housing for the benefit of low-income, homeless and formerly homeless people in Washington State; advocates for just housing policies at the local and national levels; and administers a range of supportive service programs to assist those we serve in maintaining stable housing and increasing their self-sufficiency.

I specialize in single-family residences, and accessory dwelling units, both attached and detached. I am a certified passive house designer through PHIUS

Tree Solutions Inc. is a tree consulting company in the Pacific Northwest, with offices in Seattle, WA. We specialize in urban forest management for residences, campuses, and municipalities as well as tree preservation and restoration during construction projects.

A Washington state helical pile installer to replace the use of concrete footings and foundations for building projects as small as park benches and as large as 6-story buildings.