Location: Seattle, Washington

Price: $1,295,000

Built by, and for, a principal in the Seattle-based architecture firm Balance Associates, the Euclid House towers over its tiny, 0.14-acre lot to take advantage of Lake Washington views and the surrounding forest. Multi-paned glass walls front the great room, allowing close-up views of the dense woods, while 12-foot ceilings and white walls keep the interior simple and airy. The house looks remarkably fresh and contemporary in its 19th year, but the furnishings -- particularly the black leather couches and technicolor velvet -- could use an update. As an added bonus, the house costs very little to heat and cool thanks to energy efficient windows and radiant heating.

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