1,200 sq ft Backyard House in Los Altos Hills

Set into the estate lots of Los Altos Hills, this detached backyard house carries a generous program: five bedrooms across 1,200 square feet, purpose-built to host visiting relatives. Extended family arrives, and instead of folding into the main residence they get a full home of their own. Privacy on both sides, no reshuffled schedules, no temporary air mattresses. A unit this size turns occasional visits into comfortable, open-ended stays and gives multigenerational families a permanent place to gather. The owners asked for Spanish-style finishes, and that vocabulary shapes the whole structure. Think hand-troweled stucco, a clay tile roof, arched openings, wrought-iron detailing, and warm earth-toned floors that ground each room. The aesthetic suits the rolling terrain of the Hills, where Mediterranean lines have a long history and read as native rather than imported. Every selection leans into that warmth, so the ADU feels less like an outbuilding and more like a hacienda annex that has always belonged on the property. The project is currently under construction. On completion it delivers a spacious, character-rich guest residence that absorbs a large family in comfort while adding lasting square footage and value to a premier Los Altos Hills estate.