Mini-B Passive House – 300sf Backyard Cottage now for SALE!! $65,000

Many Seattle locals had a chance to tour the new Mini-B Passive House this past month at the Phinney Neighborhood Association. The Mini-B is one of the first passive homes in Seattle and is now for sale for $65,000.

The Mini-B was designed by architect Joe Gaimpietro of Johnson Braund Design Group to be a super efficient small dwelling unit that reduces heating energy by 80-90%, provides clean fresh air, sustainable finishes, and superior thermal comfort. This is done with many layers of insulation, high-performance windows, airtight construction and heat-recovery ventilation.

Mini-B stands for Mini Bungalow and was designed to conform to passive house standards and to the City of Seattle requirements for a “Backyard Cottage” as a Detached Accessory Dwelling Unit (DADU) on a single-family lot.

Thanks to the new zoning laws for backyard cottages, the Mini-B can fit right on an average Seattle lot (4,000sf+) and start earning rental income, providing space for home expansion or a mother-in-law. The Mini-B was built in partnership between architect Joe Gaimpietro of Johnson Braund Design Group and instructor Frank Mestemacher at Seattle Central Community College’s Wood Construction Center (SCCC). This class project provided students with real life experience in green building, construction, and design.

The interior of the home is 300 sf of simple luxury. Warm fir wood, large sunny windows, and a well-designed floor plan make this cozy bungalow a feel like a real cottage home. The Mini-B comes with a kitchenette, three-quarters bath, living/dining room, bed loft, closet, equipment loft with storage, solar hot water collector, and vaulted ceiling. It is built to an energy conservation standard that uses approximately 15 percent of the heating energy used by similar houses built to current Washington State Energy Code requirements.

Don’t worry if you miss buying this backyard cottage this year. “The Mini-B is permitted as a “factory-built structure” in the State of Washington and can be built to order. As a super-efficient cost effective dwelling, the Mini-B has the potential to provide affordable housing for family, friends, students, and renters.” Mini-B is working with a local green modular factory to build more Mini-B’s at affordable prices, along with options to extend the house into a one bedroom plus loft home. Let us know if you would like more information or a private tour.

If you or anyone you know may be interested in finding out more about this exciting opportunity, or would like to know how to finance such a dwelling as a rental property, please contact Sharon Giampietro at 206-310-0967 or email “ ”.

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