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zHome – A Zero Net Energy Community

zHome - A Zero Net Energy Community

Built Green


zHome is a revolutionary, 10-unit townhome development located in Issaquah, WA that uses smart design and cutting edge technologies to radically reduce its environmental impacts.

zHome is a collaboration effort of organizations and companies that aim to revolutionize the way production homes are developed: a radical acceleration of ultra-sustainable housing. zHome partners include the City of Issaquah, King County, Built Green, Port Blakely Communities, Puget Sound Energy, Washington State University Energy Program, Howland Homes and Ichijo USA, Ltd.

Professional groups who would like to schedule a private site tour should contact Brad Liljequist at (425) 837-3448. zHome townhomes are also for sale! For more information visit Open to the public Sundays, 1-4pm.

zHome is located on High Street in Issaquah Highlands, just east of the intersection with Highlands Drive. Take exit 18 on I-90, head north on Highlands Drive, and look for the homes with the solar panels! (Map & Directions)

zHome Benchmarks

Zero Net Energy

This is the toughest of the zHome environmental benchmarks. zHome starts first with conservation, using a number of advanced energy-efficient construction techniques to reduce home energy use. This gets the homes about two-thirds of the way there. zHome units then use solar panels to generate and offset the remaining one-third to achieve net zero energy use and net zero CO2 emissions over the course of a year. Learn more

Follow this link to watch a video of NW EcoBuilding Guild member Tom Balderston of Conservation Services Group conducting a zHome blower door test!

30% Water Use

zHome relies on conservation technologies and common-sense landscaping to cut average water use in the homes by half. The other half of the water savings is achieved by capturing rainwater and recycling it for toilet flushing and clothes washing. Learn more

Healthy, Low Toxics

Since Americans spend about 90% of their time indoors, the air quality inside our homes and offices can greatly impact our health. The quality of indoor air can be up to five times worse than it is outside. zHome will offer high indoor air quality through proper ventilation and the use of low-toxicity materials. Learn more

Deep Green Materials

zHome takes into account that the source of building materials and how the materials are manufactured and harvested, have profound environmental implications. zHome materials have been selected to emphasize various aspects of sustainability. Learn more


In landscaping our outdoor spaces, we often waste water, ignore our soil’s quality and overuse chemicals that are harmful to the environment, salmon and other wildlife, and our health. zHome’s approach is to work with, not against, nature to ensure outdoor spaces are attractive, yet have as little environmental impact as possible. Learn more

zHome Solar System

The zHome solar system was designed and installed by NW EcoBuilding Guild member NW Wind & Solar.

System Design: Solar “PV” designed to generate the entire estimated electrical load for each unit.
System Size: 72.24kW’s
System Configuration: 10-Roof mount townhomes and 1-Community Center system – all grid tied
Solar Modules: SolarWorld 240W Modules (
Inverters: Enphase M190 MicroInverters (

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