San Jose ADU Builder.
South Bay scale, predictable review.
San Jose ADU work moves through City of San Jose PBCE. As the largest South Bay city, San Jose has invested in a streamlined ADU process — pre-approved standard plans, expedited review tracks, and predictable plan-check timelines.
Licensed California contractor · CSLB #1156772 · Bay Area desk · City of San Jose PBCE (Planning, Building & Code Enforcement)
City-specific deep dives
- Cost guideOpen the San Jose cost guideEvery line item, 2026 prices, no surprises. The number you should be quoting from.
- Permits guideSan Jose permits guide — plan check, fees, timelinePlan-check workflow, fees, and realistic turnaround for this jurisdiction.
- Timeline guideHow long adu really takes in San JosePhase-by-phase schedule grounded in active builds, not optimistic Gantt charts.
About ADU work in San Jose
We deliver ADUs and remodels across Willow Glen, Cambrian, Almaden, Berryessa, Rose Garden, Naglee Park, Evergreen, and Alum Rock — typical South Bay flat-parcel pattern with mature-tree considerations.
What the San Jose ADU math actually looks like.
- Permit timeline
- 3–5 months
- 1BR ADU rent (San Jose)
- $2,500–$3,300/mo
- Typical project cost
- $320K–$480K
What we resolve before drawings begin.
- 01
Pre-approved ADU plans
San Jose maintains a library of pre-approved ADU plans that can shorten plan-check meaningfully when one fits your lot and program.
- 02
Predictable plan-check
San Jose generally clears ADU plan-check in 3–5 months — among the faster Bay Area cities.
- 03
Tree protection
Heritage tree rules apply across the city. We site ADUs to avoid root zones and pull required tree permits when proximity is unavoidable.
San Jose neighborhoods we serve
- Willow Glen
- Cambrian
- Almaden
- Berryessa
- Rose Garden
- Naglee Park
- Evergreen
- Alum Rock
San Jose services we deliver.
All Bay Area services →- Bay Area ADU BuilderOpen bay area hub →
- Bay Area Garage ConversionOpen bay area hub →
- Bay Area JADU BuilderOpen bay area hub →
- Bay Area New Home ConstructionOpen bay area hub →
- Bay Area Hillside ConstructionOpen bay area hub →
- Bay Area Small Multifamily & 2–6 UnitOpen bay area hub →
- Bay Area Home AdditionsOpen bay area hub →
- Bay Area Kitchen RemodelingOpen bay area hub →
- Bay Area Bathroom RemodelingOpen bay area hub →
- Bay Area Whole Home RemodelingOpen bay area hub →
- Bay Area RoofingOpen bay area hub →
- Bay Area Siding & StuccoOpen bay area hub →
- Bay Area Decks & Outdoor LivingOpen bay area hub →
- Bay Area Concrete & FlatworkOpen bay area hub →
- Bay Area Windows & DoorsOpen bay area hub →
- Bay Area Foundation Repair & ReplacementOpen bay area hub →
- Bay Area Framing & Structural WorkOpen bay area hub →
- Bay Area Seismic RetrofitOpen bay area hub →
- Bay Area Commercial Tenant ImprovementOpen bay area hub →
- Bay Area HOA Construction ServicesOpen bay area hub →
- Bay Area Property Management ConstructionOpen bay area hub →
Other Bay Area cities we serve.
San Jose · ADU FAQ
Questions San Jose homeowners ask first.
Start a San Jose ADU brief. We'll evaluate pre-approved plan fit, tree considerations, and a fixed-scope contract.
Should I use a pre-approved San Jose ADU plan?
If one fits your lot and program, yes — it cuts permit time meaningfully. We compare custom vs pre-approved at feasibility.Is San Jose faster than SF or Oakland?
Typically yes — plan-check often clears in 3–5 months, faster than SF (5–8) and on par with the quicker East Bay cities.
More research for San Jose
- San Jose adu — true all-in costCost transparency
- Model ROI for an ADU in San JoseFinancial modeling
- Cash, HELOC, or construction loan — which fits?Capital options
- San Jose adu — every cost question, answeredFAQ — Cost & Budget
- ADU permits in San Jose: every questionFAQ — Permits & Code
- How long does it really take in San Jose?FAQ — Timeline & Phases
- Financing FAQ — loans, escrow, drawsFAQ — Financing & ROI
- San Jose-friendly floor plans and finishesFAQ — Design & Specs
- Renting an ADU in San Jose — rules and yieldsFAQ — Rental & Tax
- San Jose owners often also consider Beverly HillsCross-city signal
- ADU in nearby Santa MonicaCross-city signal
- Pasadena adu — permits & turnaroundCross-city signal
- Long Beach adu — permits & turnaroundCross-city signal
- Compare adu in San Jose vs BurbankCross-city signal
- Compare adu in San Jose vs GlendaleCross-city signal
- Browse every city we build ADUs inService hub
- Deep dive — San Jose ADU permitting: the South Bay playbookEditorial deep-dive
- Guide: San Jose ADU cost and permits: the fastest Bay Area permit cycleEditorial deep-dive
- San Jose detached ADU cost in 2026: the 800 sq ft number across the South BayEditorial deep-dive
- See our Culver Conversion in San JoseProof of work
- Case study: Manhattan Beach StudioProof of work
- LegalPillar guide
- Browse permitsPillar guide
- Definition: ADUEntity definition
- What is JADU?Entity definition
- Definition: Detached ADUEntity definition
- Attached ADU — glossary entryEntity definition
- California permit directory — San Jose jurisdictionAuthority signal
Begin your projectin twenty minutes.
A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.
- No obligation
- Reply within 24 hours
- License & insurance on request