The sublime beauty of the Grand Tetons is fully embraced in the stunning House of Fir, a forever home that boasts sustainable and durable elements throughout. Designed by Wyoming-based architecture firm kt814 for a pair of retirees who actively volunteer for the National Park Service, this Jackson Hole abode was crafted to prioritize low-maintenance comfort with passive house design principles and universal design for aging in place. In fact, the home’s energy-efficient construction was put to the test this past winter, when the homeowners lost power — the home was able to stay comfortably snug for four consecutive days despite below-zero temperatures outside.

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The House of Fir comprises three connected pavilion-like units clad in Douglas fir and cedar that span a total area of 2,500 square feet, plus a 685-square-foot garage. Sloped rooflines help the structures shed snow in winter. Architects Rich Assenberg and Nathan Gray of kt814 carefully positioned the home to follow passive solar principles and to maximize privacy as well as unobstructed views of the spectacular Teton Range. The key to success was the installation of FSC-certified Thermo Clad Pine, triple-glazed windows that usher in landscape views; the strategic placement of the full-height glazing also blocks views of the homes to the east and west.

Related: Modern open-plan home in Jackson Hole reduces construction waste with six prefab units

In addition to triple-glazed windows, the House of Fir incorporates an airtight double wall system with superior insulation and hydronic radiant-floor heating. Local designer Jacque Jenkins-Stireman dressed the clean and modern interiors in a natural material palette that matches the architecture to keep the focus on the outdoors. For instance, many of the furnishings, like the kitchen cabinet doors, dining table and master bedroom furniture were constructed from a mixture of walnut. Alex Everett, the homeowner’s son-in-law, also handcrafted custom pieces for the house, giving it a personal touch.

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Images by David Agnello