Berm house, McKinney Ridge II - Methow Housing Trust

GREEN BUILDING — COLLABORATION — PACIFIC NORTHWEST DESIGN — RESIDENTIAL DESIGN

WINTHROP, WASHINGTON

The Methow Valley, in the foothills of the North Cascade Mountain Range, is known for its access to nature, cold winters with abundant snowfall, and hot summers.

The Berm House is a private residence that doubles as the common house and gathering space for a 19 house mixed-income community in Washington’s Methow Valley. The house is set into the landscape, with a panoramic view of the farmland down valley, but hidden from the road by a berm that ramps up onto and across the roof. 

The south-facing building orientation optimizes winter solar exposure coupled with large overhangs to protect from snowfall and the intense summer sun. The home is post and beam structure with a cross-laminated timber (CLT) roof prefabricated in northeastern Washington. The design incorporates Passive House principles including managing seasonal heat gain from solar exposure, advanced air sealing, and mechanical ventilation. Thermal bridges are minimized by wrapping the house in continuous external insulation, including structural EPS under the foundation, isolating the home from outdoor temperature swings. The earthen roof adds thermal mass, wildfire protection, and a promontory to take in the down valley vista.

The great room portion of the house was designed for friends and neighbors to gather, share meals, and be a social center for the community. Off the great room, a five-foot wide hall leads to three guest suites and the primary suite.

The CLT ceiling, glulam posts and beams, maple plywood panels, and dark hickory casework present a variety of wood character and species. A coffee table and kitchen bar are crafted from a fir tree felled nearby. The exterior employs the Japanese shou sugi ban preservation technique. The boulders throughout the site and as part of the berm were pulled from the site and placed by the owner. 

Green Design: Passive House principles, superinsulation, advanced air sealing, cross-laminated timber panels, live roof

Featured:
- Mountain Living, A Gathering Place
- Cover story on Methow Valley News
- ‘Berm House’ is a New Centerpiece for Growing Methow Valley Community Here
- Seattle DJC’s Sustainable Building /Mass Timber special section. Read the Article Here