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Zero Energy ADU

Zero Energy ADU

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Project Details

Designed by Ben Valentin of Birdsmouth Construction, this Earth Advantage certified Zero Energy ADU meets the Passive House requirement for airtightness. Triple pane European Glo windows, continuous super-insulation, a mini split heat pump, heat recovery ventilation and a 5.6 kw solar PV array make this ADU extremely comfortable. On top of it, this ADU produces more energy than it consumes over the course of a year. On top of it we think it looks pretty cute.

Birdsmouth Design-Build
Certified B Corporation

3525 SE 17th Ave, Portland, OR 97202

(503) 753-9692

info@birdsmouthpdx.com

Phius Certified Builder
Earth Advantage
Trade Ally of Energy Trust of Oregon

OR CCB# 184665
WA CCB# BIRDSD*761C9

© 2026 Birdsmouth Design-Build. Licensed in Oregon and Washington.