South Bay city hub

ADU Planning in San Jose

San Jose has the deepest ADU search demand in the launch set and enough official ADU process material to support source-backed guidance.

Santa Clara County

Project demand

What homeowners plan in San Jose.

San Jose maintains a dedicated ADU page, universal checklist, preapproved ADU program, fire requirements, and ADU Ally contact path. Confirm requirements against the city before submitting.

Detached ADUGarage conversionPermit-ready plansJADU

Providers

ADU providers serving San Jose.

Featured profile

Acton ADU

ADU specialist with Build Ready and Custom site-built paths

Model ADU Builders / ADU Companies +3

Cities Campbell, Cupertino, Los Altos, Los Gatos, Mountain View, Palo Alto, San Jose, Santa Clara, Saratoga, Sunnyvale

View profile Ask about fit

Bright compact ADU interior with warm finishes

Featured profile

FabuHome

Budget-first ADU planning and design-build path

Model ADU Builders / ADU Companies +3

Cities Burlingame, Cupertino, Los Gatos, Mountain View, Palo Alto, Redwood City, San Jose, San Mateo, Santa Clara, Saratoga, Sunnyvale

View profile Ask about fit

Backyard site work before ADU construction

Featured profile

Villa

Prefab detached ADU with turnkey delivery and permit support

Model ADU Builders / ADU Companies +1

Cities Cupertino, Fremont, Mountain View, Palo Alto, Redwood City, San Jose, San Mateo, Santa Clara, Sunnyvale

View profile Ask about fit

Source noted

Red Shed Studio

Custom ADU design-build and garage conversion for San Jose/South Bay lots

Model ADU Builders / ADU Companies +3

Cities Los Gatos, Mountain View, Palo Alto, San Jose, Santa Clara, Saratoga, Sunnyvale

View profile Ask about fit

Source noted

VitalizeBuild Construction

Custom and predesigned ADU design-build for complex Bay Area lots

Model ADU Builders / ADU Companies +3

Cities Campbell, Cupertino, Fremont, Los Altos, Milpitas, Mountain View, Palo Alto, Redwood City, San Jose, San Mateo, Santa Clara, Saratoga, Sunnyvale

View profile Ask about fit

Source noted

Inspired ADUs

Architect-led ADU design, permitting, plan catalog, and builder-selection support

Model ADU Builders / ADU Companies +3

Cities Los Gatos, Palo Alto, Redwood City, San Jose, San Mateo

View profile Ask about fit

Official sources

San Jose ADU links to verify before filing.

San Jose publishes dedicated ADU resources, including ADU process guidance, universal checklist, FAQs, preapproved plans, and fire requirements.

FAQ

San Jose ADU questions.

How should I compare ADU builders in San Jose?

Start with ADU type, local experience, permit responsibility, drawings, budget assumptions, utility scope, and similar project examples in or near San Jose.

What projects are common in San Jose?

Detached ADU, Garage conversion, Permit-ready plans, JADU

Should I get drawings before talking to San Jose ADU builders?

Usually yes for serious pricing. Drawings make bids comparable and reduce expensive ambiguity.