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The Boucvalt-Gras House is a distinctive one story residential bungalow structure, built in the California Bungalow tradition. Completed in 1914, the house is of frame construction with clapboard cladding and a low hipped roof. The house embodies the distinctive characteristics of early twentieth century bungalow construction as adapted to Rock Springs at the time it was an important coal mining center tied to the Union Pacific Railroad and its fortunes. The Boucvalt-Gras House is probably the oldest of the bungalow style houses in Rock Springs.