Like the famous Philip Johnson project that its name riffs on, the Grass House is all about transparency—but not the superficial, paranoid kind that relies on open floor plans and full-height glass windows. “This building is really about being as transparent with the construction process, with the material selection process, with the design process, as possible,” said Andrew Linn, cofounder of bld.us, the Washington, D.C.–based practice behind the house, “even if that leads to darker, rougher spaces than typical.” The house doesn’t present a frictionless, techno-utopian vision of sustainable design, but instead celebrates the texture and tactile richness of its organic constituent materials.

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