Peninsula city hub
San Mateo ADU planning should start with city standards, permit fee assumptions, and whether the homeowner is using preapproved or custom plans.
San Mateo CountyProject demand
San Mateo publishes ADU/JADU information, permit fee notes, standards, submittal guides, and official contacts.
Providers
Partner disclosed 79 Budget-first ADU planning and design-build path
Budget-first South Bay and Peninsula residential design-build team positioned for ADU planning, permit drawings, garage conversions, and construction handoff.
Shortlist seed 67 Prefab ADU comparison
Prefab ADU provider with public Bay Area ADU builder positioning and manufactured-home style offerings.
Public source 71 Full-service ADU company comparison
Bay Area ADU provider publicly positioned around full-service ADU solutions.
Public source 70 Custom ADU and local design-build comparison
Bay Area design-build construction company with public ADU content and local construction positioning.
Public source 66 ADU coordination and contractor path comparison
Bay Area/Northern California ADU coordination provider with public positioning around ADUs, JADUs, additions, and contractor coordination.
Public source 61 Investor and professional landlord ADU planning
Bay Area ADU expert positioning focused on professional landlords and investors.
Official sources
Use official city resources as the source of truth before submitting plans.
City-service pages
This city has provider coverage but no dedicated city-service page yet.
FAQ
Start with ADU type, local experience, permit responsibility, drawings, budget assumptions, utility scope, and similar project examples in or near San Mateo.
Detached ADU, Garage conversion, Preapproved plans, JADU
Usually yes for serious pricing. Drawings make bids comparable and reduce expensive ambiguity.
