ADU Design & Build · Los Gatos
ADU Builder in Los Gatos
Guest-house ADUs built to the 95030 standard — on larger in-town parcels and in the hills — with the town's design review and hillside requirements handled.
Los Gatos blends resort-town charm with serious wealth — historic downtown, top schools, and parcels that range from in-town lots with room for a guest house to hillside estates off Highway 9. ADUs here read as guest houses: finished to the home's standard and sited with care.
The town protects its character deliberately, with design review and hillside development standards that have teeth. ADU law still applies — compliant units get ministerial 60-day approval, even in hillside zones — but on a hillside parcel, grading, drainage, fire access, and height shape what 'compliant' means. Our feasibility review answers that before you spend on design.
We handle the whole arc: feasibility on your parcel, a design that satisfies both ADU law and the town's standards, the permit, fixed-price construction (with the site work hillside lots demand), and rent or guest-suite guidance from our brokerage.
ADU permits in Los Gatos
Town of Los Gatos Community Development (110 E. Main St.) holds the 60-day state clock for compliant ADUs, including in hillside zones — but hillside site standards (grading, drainage, height, fire access) shape feasibility. In-town flat lots are straightforward; hillside parcels need geotechnical and drainage design folded into the ADU package, which we handle.
What’s included
Hillside-Capable Feasibility
Grading, drainage, access, and fire standards assessed on your Los Gatos parcel before design spend.
Guest-House ADUs
Detached units finished to the main home's standard — the Los Gatos norm, not a bare rental box.
Geotech & Site Work
Engineered foundations, retaining, and drainage where the hills demand it — priced upfront, not as surprises.
Design-Review-Savvy
Designs that satisfy ADU law and the town's standards so approval stays inside 60 days.
Financing & Fixed Pricing
Cost/rent/payback modeled upfront; locked construction pricing with milestone payments.
What it costs in Los Gatos
| Project | Typical Range | Notes |
|---|---|---|
| Garage / interior conversion | $160K – $260K | Premium finish to home standard |
| Detached guest-house ADU (flat lot) | $280K – $520K | $400–$600/sq ft |
| Detached ADU (hillside parcel) | $420K – $750K+ | Adds geotech, retaining, drainage, access |
| Attached ADU | $380 – $520 / sq ft | Shares structure; saves foundation cost |
Hillside site work is the swing factor. Los Gatos commands top-of-market ADU rents and resale, so the ROI math holds at these costs.
What we build in Los Gatos
- Guest-house ADUs on larger in-town parcels
- Hillside detached ADUs with retaining & drainage scope
- Interior/garage conversions finished to home standard
- Pool-house and office ADUs near downtown
- Multigenerational guest suites in Almond Grove & Glenridge
ADU Design & Build — full details
Process, scope, and everything our adu design & build service covers Bay Area-wide.
All services in Los Gatos
Remodels, ADUs, permits, real estate, and financing across Los Gatos.
Los Gatos ADU Design & Build FAQs
Can I build an ADU in the Los Gatos hills?+
Yes — state law applies in hillside zones too, with ministerial approval within 60 days for compliant units. But hillside site standards (grading, height, fire access, drainage) shape what's compliant on your parcel. Our feasibility review answers it before you spend on design.
What does a Los Gatos ADU cost?+
Detached guest-house ADUs on flat lots run $400–$600/sq ft ($280K–$520K) given the finish standard; hillside parcels add geotechnical, retaining, and drainage work, pushing $420K–$750K+. We price the site realities at feasibility, not as change orders.
Why are Los Gatos ADUs more expensive than other cities?+
Two reasons: finish expectations (a Los Gatos guest house is built to the main home's standard, not a bare rental), and site conditions (hillside grading, drainage, and access). The town's top-of-market rents and resale values support the investment.
Will design review block my ADU?+
Not if it's compliant — ADUs get ministerial 60-day approval, which limits discretionary review. Design choices still matter for fitting the neighborhood and the home, and we handle them so approval stays on the clock.
How long does a Los Gatos ADU take?+
Flat in-town lots: 9–14 months. Hillside parcels run longer — geotechnical work, engineered foundations, and site access add design and construction time. Feasibility gives you a realistic schedule for your specific lot.
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