Net-Zero Cascade SIP House Bellingham WA

Location: Bellingham, WA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Premier Building Systems
Builder: TC Legend Homes
Design Professional: TC Legend Homes
Year Built: 2022


High Performance: Yes
HERS/EUI Index Score: -8
ACH50 - Blower Test Results:
CO2 lbs./sq.ft./year:

Awards/Certifications: DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS

This is the home of the future. Almost every detail is different. From the way the energy shell is constructed, to the comfort systems that keep your air healthy, and your home at a comfortable temperature.

Cascade Lane

Cascade was constructed and sold as a spec home, neighboring two other TC Legend Houses from the earlier days of Ted’s green construction career. The home is nestled in the steep hillside with the driveway and most of the house standing on stilts. The area is notorious for almost inaccessibly steep driveways, so to create a usable flat driveway at street level and eliminate concrete retaining walls, the 24’ wide driveway bridges to the house with the garage located on stilts, on-grade with the main (second) floor. Cascade projects into space with only a small foundation containing the plumbing. This stilt-house configuration substantially reduces the cost to build from a traditional foundation and leaves the onsite flora largely intact.

From the entry you walk into the open kitchen, living and dining area with views of the green forest all around. Behind the kitchen is the utility room and first bathroom. On the lower floor are three bedrooms and a bathroom, with the master able to be re-configured as a Jack-and-Jill. Also on the lower floor is the laundry which is located under the stairs and a cozy living or work space with a sliding glass door out to a small deck that can hold your mini vegetable garden. In total, Cascade is 1400 sf with 3 bedrooms, 2 bathrooms and a 240 sf garage.

Built and performing just as all our standard homes, Cascade is a Net-Zero home and will receive a Built Green 5 star certification along EPA Indoor AirPLUS certification, EPA Energy Star certification and Department of Energy Zero Energy Ready Home rating.

This home will make its own power, and power your transportation. With HEPA air filtration, controlled by sensors, and zero-VOC finishes, your home will be a fresh air sanctuary. This home has a HERS score of -8 and an embodied carbon score so that you can compare to other homes. 


  • 1400 square feet
  • 3 bedrooms, 2 bathroom
  • 240 sf garage
  • Cook’s kitchen
  • Kitchen bar
  • HERS: -8
  • Roof & Floors: R-46.5
  • Walls: R-27.7

Affiliated Members

BASF Corporation

Houston, TX
Premier SIPS

Puyallup, WA


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