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ADU Planning in San Mateo

San Mateo ADU planning should start with city standards, permit fee assumptions, and whether the homeowner is using preapproved or custom plans.

San Mateo County

Project demand

What homeowners plan in San Mateo.

San Mateo publishes ADU/JADU information, permit fee notes, standards, submittal guides, and official contacts.

Detached ADUGarage conversionPreapproved plansJADU

Providers

ADU providers serving San Mateo.

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
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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
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ADU framing and construction progress 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
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ADU framing and construction progress 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
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Permit-ready ADU floor plan Source noted

HAUS+

Full-service hybrid prefab ADU for design-forward Bay Area yards

Model ADU Builders / ADU Companies +2
Cities Burlingame, Fremont, Mountain View, Palo Alto, Redwood City, San Jose, San Mateo, Santa Clara, Sunnyvale
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Modern backyard ADU exterior elevation Source noted

The ADU Dudes

ADU coordination with Signature plans and licensed-contractor construction path

Model ADU Builders / ADU Companies +2
Cities Burlingame, Fremont, Milpitas, Mountain View, Palo Alto, Redwood City, San Jose, San Mateo, Santa Clara, Sunnyvale
View profile Ask about fit

Official sources

San Mateo ADU links to verify before filing.

Use official city resources as the source of truth before submitting plans.

FAQ

San Mateo ADU questions.

How should I compare ADU builders in San Mateo?

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

What projects are common in San Mateo?

Detached ADU, Garage conversion, Preapproved plans, JADU

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

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

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