Bayview DADU




Hosted by: [bundle] design studio

  • Contractor: Jake Fox Builders
  • Building designer: [bundle] design studio
  • Structural Engineering: Bradley Engineering
  • Geotechnical Engineer: Sound Geology

Green Features: 

  • Passive house design
  • High-performance building envelope
  • Heat recovery ventilator
  • High-performance windows
[bundle] design studio

Photo Gallery


This Detached Accessory Dwelling Unit project is an intergenerational living space built for the owners’ grandparents, with an 800 sq ft garage and a 450 sq ft, one-bedroom apartment. The garage meets the parking requirements while the apartment is solar-oriented and provides stunning views of Bellingham Bay. The project is designed to meet the Passive House standard with energy-efficient features, such as high-performance windows, HRV, and a mini-split heat pump. The Heat pump water heater in the garage provides domestic hot water needs and saves space in the apartment.

  • One-bedroom DADU on the second floor
  • Vertical separations provide privacy for occupants.
  • Infill housing within the Bellingham City limits
  • Solar-oriented with primarily South facing glazing for optimal passive solar heating
  • Protected in summer with a large south roof overhang
Water Efficiency

Heat pump water heater

Energy & Atmosphere

Passive House Design:

  • Airtight construction
  • Continuous insulation
  • High-performance windows
  • Ventilation w/ heat recovery
  • High-performance Windows
  • Heating/cooling
Materials & Resources

Low Embodied Carbon Building:

  • Wood framing
  • DP cellulose insulation
  • Cork exterior insulation
Indoor Air Quality
  • HRV w/ Merv 13 filters
  • Air tight construction

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Many thanks to our Event Sponsors:


Chuckanut Builders
Envision Homes


Many Thanks To Our Energy & Green Building PROGRAM Funders and Sponsors!


Puget Sound Cooperative Credit Union
Puget Sound Cooperative Credit Union
Truly Electric & Solar
Instinct Builders
Ecotech Solar
Puget Sound Cooperative Credit Union
Puget Sound Cooperative Credit Union
Bellingham Bay Builders
Puget Sound Cooperative Credit Union
CAZ Construction