ADU, Garage Conversion & Permit Plans in San Jose, CA
From your idea to an approved building permit in San Jose.
Get a Free EstimateServices in San Jose
ADU / JADU Design
Permit-ready plans for detached and attached ADUs and junior ADUs.
Garage Conversions
Convert your existing garage into permitted living space.
Home Additions
Expand your home with a permitted room or story addition.
Remodels
Structural and non-structural remodel plans for permit submittal.
Fire Rebuilds
Reconstruction plans for fire-damaged and disaster-affected properties.
New Home Design
Full construction drawings for new custom homes.
Getting a Building Permit in San Jose
San Jose is the largest city in the Bay Area, and residential permits are processed through the City of San Jose Department of Planning, Building and Code Enforcement. We prepare plans for submittal to the local building department and manage plan check corrections through approval.
Our process includes a site visit and measurements, design, construction drawings, structural and Title 24 energy coordination, submittal, and corrections. San Jose has a diverse housing stock — mid-century ranches in Willow Glen and Cambrian, larger homes in the Almaden Valley and Evergreen, and older bungalows in the Rose Garden and Japantown neighborhoods. ADU projects are extremely common in San Jose given the high cost of housing and the city's ADU-friendly policies.
We also serve clients in Santa Clara, Sunnyvale, Campbell, Los Gatos, and other communities in Santa Clara County.
Why San Jose homeowners work with us
We have prepared permit plans for residential projects throughout the Bay Area, including San Jose. Our team handles the complete process — site visit, design, drawings, structural and energy coordination, and plan check corrections — so you have one point of contact from start to approval.
Bay Area homeowners often pursue ADU projects to generate rental income or accommodate family members. We work with homeowners, contractors, and investors throughout San Jose and Santa Clara County.
Frequently asked questions
Do I need a permit for a garage conversion in San Jose?
Yes. A garage conversion in San Jose requires a building permit. Plans must address the change of use, structural modifications, insulation, egress windows, and electrical and mechanical systems. We prepare complete permit-ready drawings for garage conversions in San Jose.
Can I build an ADU on my property in San Jose?
Yes. California law allows ADUs on most residential lots, and San Jose has adopted ADU-friendly local ordinances. Detached ADUs, attached ADUs, and junior ADUs are all options depending on your property. We can review your lot and advise on what is feasible.
How long do plans take?
Plans usually take 10–15 business days after we complete measurements. City review time in San Jose varies depending on project type and current building department workload.
Do you serve areas near San Jose?
Yes. We serve Santa Clara, Sunnyvale, Campbell, Los Gatos, Milpitas, and other communities in Santa Clara County and the surrounding Bay Area.
Planning a project in San Jose?
Get a free estimate.
Call (916) 694-9949 or email david@liberty-drafting.com
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