ADU San Mateo

Projects

Real ground-up ADUs we've designed and built across the Bay Area. No prefab, no shortcuts.

The Andrew Penny ADU, Saratoga, CA
The Andrew Penny ADU, detail 1
The Andrew Penny ADU, detail 2
The Andrew Penny ADU, detail 3

Saratoga, CA

The Andrew Penny ADU

A 997 sq ft detached ADU in design and permitting: two bedrooms, one bath, a vaulted living room, and an arched covered porch beside the pool. Construction has not started yet.

Detached ADU2 bed / 1 bathPre-construction
The Devon ADU, Devon, CA
The Devon ADU, detail 1
The Devon ADU, detail 2
The Devon ADU, detail 3

Devon, CA

The Devon ADU

A two-story detached ADU under construction: framed on site, weather-wrapped with flashed window openings under a shingled gable roof, and drywalled inside beneath vaulted, skylit ceilings.

Detached ADUTwo-storyIn progress
The Grand ADU, Grand, CA
The Grand ADU, detail 1
The Grand ADU, detail 2
The Grand ADU, detail 3

Grand, CA

The Grand ADU

A detached ADU under construction: the yard cleared and excavated, concrete footings and a slab poured over a rebar grid, and the walls and roof now framed on site.

Detached ADUNew constructionIn progress
The Silvia ADU, Silvia, CA
The Silvia ADU, detail 1
The Silvia ADU, detail 2
The Silvia ADU, detail 3

Silvia, CA

The Silvia ADU

A completed detached ADU in Silvia with a shaker kitchen with quartz counters and a tile backsplash, a fully tiled bath, mini-split climate control, and sliding glass doors onto the lawn.

Detached ADUNew constructionCompleted 2026
The Hillcrest ADU, Hillcrest, CA
The Hillcrest ADU, detail 1
The Hillcrest ADU, detail 2
The Hillcrest ADU, detail 3

Hillcrest, CA

The Hillcrest ADU

A ground-up Spanish-revival detached ADU with hand-troweled white stucco, a clay-tile roof, arched entry, and a hand-set Moroccan tile niche, opening to a beamed, barrel-vaulted interior with walnut cabinetry and waterfall quartz.

Detached ADUSpanish RevivalClay-tile roof

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