Completion date


3 full-time occupants

Days per year Building is fully occupied:


Deconstructed a 720-square-foot cottage, recycled the building materials, and constructed a new 1800-square-foot home on the property.

Type of Construction New, Retrofit
Number of buildings 1
Floor area of each building 1,800
Bedrooms 4
Bathrooms 3.0
Stories 2
Conditioned Floor Area 1,800 sq ft

Location and Climate Details

single-family residence

4235 Main St
Portland, OR 97215
United States
Location Type Urban
Climate Region Zone 5
Köppen Climate Type Csb
Lat. / Long. POINT (-122.61889 45.513648)
Solar Insolation 3.38 kWh/m2/day


Site conditions:
previously developed land
Site description:

The previous home demolished in the construction project was a 1950's factory-built cottage that had "fallen into disarray after being rented to multiple rock bands," homeowner Royapet said.

Materials and Design Strategy

Special Materials:

R-60 (24″) attic, R-38 underfloor, & R-35 wall insulation
Dense-pack blown in fiberglass insulation
Low-e Anderson 100 windows with recycled content in glass & frames
Bamboo flooring
80% post-consumer recycled metal roofing
Spero low formaldehyde MDF trim (no added urea-formaldehyde)
Zero VOC paint

Indoor Environment Description:
Whole house HRV No carpeting was used