Garage Conversion in Atherton, CA | San Jose Garage Conversions

Local Knowledge

Garage conversions built around Atherton's estate-lot character

Atherton's lots run larger than almost anywhere else in the Bay Area, and the town's design review process reflects that scale — exterior changes on a property here are typically reviewed with an eye toward preserving the estate character of the surrounding neighborhood, even on a project as contained as a garage conversion. Many Atherton garages are also substantial structures in their own right, built to match the scale of the main house, which can make a full ADU conversion more straightforward from a square-footage standpoint than in a denser suburban city. We plan every Atherton project around the town's design review expectations from the outset rather than assuming a standard suburban process.

Services in Atherton

What we build for Atherton homeowners

Garage-to-JADU Conversion

Convert your attached Atherton garage into a Junior ADU within your home's existing footprint — simpler permitting, shared utilities, up to 500 sq ft.

Garage-to-ADU Conversion

A full accessory dwelling unit with independent utilities, built out from your existing attached or detached garage in Atherton.

Garage-to-Home Office / Studio

A quiet, code-compliant workspace built into your Atherton garage, without triggering dwelling-unit permitting.

Detached Garage Conversion

Standalone Atherton garages converted into a backyard ADU, studio or guest unit, with new utility runs sized for the finished space.

Our Process

How a Atherton garage conversion moves from design to final inspection

01

Design & Feasibility Review

We evaluate your Atherton garage's slab, framing and ceiling height against what you want to build, and confirm your lot's setback and coverage rules.

02

Permits & Title 24 Compliance

We prepare and file your permit package with Atherton's building department, including Title 24 energy calculations, and manage plan check corrections.

03

Construction & Rough-In

Framing, insulation, electrical, plumbing and HVAC rough-in built to the approved plans.

04

Final Inspection & Handoff

We schedule and walk through final inspection with Atherton, then hand you a finished, permitted space.

Why Atherton Homeowners Choose Us

Atherton homeowners come to us because the town's design review weighs exterior changes carefully even on estate-sized properties, and a conversion plan needs to be built around that from the outset.

JADU & ADU permitting specialists

We know the difference between a JADU and an ADU cold, and scope your project to the one that actually fits your goals.

Licensed, bonded & insured

Full California contractor's license and insurance coverage — ask to see it.

We know Atherton's specific rules

Atherton's design review considers estate-character context even on contained projects — we plan exterior details with that review in mind from the start.

We evaluate what's already there

Existing garage slabs, framing and rooflines aren't automatically reused or automatically torn out — we assess what's structurally sound first.

Service Areas

Also converting garages nearby.

Based in San Jose, working throughout Santa Clara, San Mateo and southern Alameda counties.

Atherton Belmont Campbell Cupertino Dublin East Palo Alto Foster City Fremont Gilroy Hayward Hollister Los Altos Los Altos Hills Los Gatos Menlo Park Milpitas Morgan Hill Mountain View Newark Palo Alto Pleasanton Redwood City San Carlos San Jose San Mateo Santa Clara Saratoga Sunnyvale Union City Woodside

FAQ

Questions homeowners ask us

Often, yes, given how closely the town reviews exterior changes to preserve neighborhood character. A conversion that keeps the garage's existing footprint and appearance largely intact generally faces a lighter review, but we confirm what your specific project will trigger before we design it.

A JADU stays within your garage's existing footprint, is capped at 500 square feet, and can share utilities with the main house — usually a simpler, faster permit. An ADU can be larger or detached, requires independent utilities, and has no owner-occupancy requirement.

Often, yes — Atherton's estate-scale properties frequently come with substantial garage structures built to match the main house. We measure your garage's actual dimensions and confirm what fits during the site walk.

Yes — we prepare the Title 24 energy calculations and CF1R documentation as part of every permit package, and manage plan check correspondence directly with the city so you're not the one interpreting correction letters.

Free, No-Obligation Quote

Let's talk about your garage.

Tell us what you're converting it into — a JADU, an ADU, an office — and we'll get back to you with next steps, usually within one business day.

(408) 442-9136

JADU & ADU garage conversions for Atherton homeowners

What are you building in Atherton?