ADU Builder for Saratoga & Silicon Valley
ADU & Addition Construction
A backyard home, built like a custom home
An accessory dwelling unit is a real house on a small footprint — it deserves the same design attention, engineering, and craftsmanship as the main residence. We build ADUs the way we build custom homes: one accountable team from first sketch to final walkthrough.
Because our office is in Saratoga, we work with the same city planning departments, hillside lot rules, and neighborhood design standards week in and week out — and we handle ADU design and permitting in-house rather than handing you off to a third party.
Who builds custom ADUs in Saratoga and Silicon Valley?
Monsen Collins Builders designs and builds custom ADUs across Saratoga, Los Gatos, and Silicon Valley — like Faraone, a ground-up 1,200 sq. ft. ADU built behind an existing family compound. As a Saratoga-based general contractor since 2000, we handle design, city permitting, and construction in-house.
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