ADU Permit Requirements in San Jose, California
Everything you need to apply for a adu permit in San Jose, California — documents, fees, steps, and a downloadable submission packet.
Key Facts
- Permit required
- Yes
- Submission method
- Online
- Typical fee range
- $6,750 – $23,100
- Review time
- Varies by jurisdiction
- Inspections
- 7 inspections required
Permit Requirements (7 items)
7 required📋 Forms & Applications(1)
📐 Plans & Diagrams(4)
📄 Supporting Documents(2)
Generate your permit packet
Get a personalized ADU permit packet for San Jose, California — tailored to your project details.
- Required forms: Building Permit Application, and more
- Pre-filled templates: Permit Cover Sheet
- Fee breakdown: $2,250–$14,000 estimated total
- Step-by-step San Jose Department of Planning, Building and Code Enforcement portal submission guide
- Inspection prep checklist (7 items)
- Personalized for your specific project details
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Permit Process
Follow these steps to submit your permit application through San Jose Department of Planning, Building and Code Enforcement.
- 1
Pre-Application Review and Zoning Verification
Consult with San Jose Planning staff to verify zoning compliance, ADU eligibility, and confirm property meets local requirements. Obtain zoning verification letter.
You'll need: Property Deed and Title, Zoning Verification Letter
- 2
Submit Complete Plans and Application
Submit complete building permit application with all architectural, engineering, and site plan documents to Planning Department
You'll need: Building Permit Application, Architectural Plans, Site Plan, Structural Calculations, Utility Connection Plans
- 3
Plan Review and Staff Evaluation
Planning and Building staff review plans for compliance with San Jose Municipal Code Chapter 20.100 (Zoning), state ADU law (AB 2221, SB 9), and California Building Code
- 4
Revisions and Clarifications
Submit revised plans if staff identifies code compliance issues or requests additional information
- 5
Pay Permit and Plan Review Fees
Pay calculated permit fees based on construction valuation and plan review costs
- 6
Construction Inspections
Schedule and pass required building inspections: foundation, framing, electrical, plumbing, mechanical, and final inspections
- 7
Certificate of Occupancy
Receive Certificate of Occupancy after final inspection and compliance verification
Fees and Timeline
Fee Breakdown
| Fee | Range | Confidence |
|---|---|---|
| ADU Permit Fee | $4,500 – $14,000 | Verified |
| Plan Review Fee | $2,250 – $9,100 | Verified |
Inspections Required
Foundation and footing installation per California Building
Foundation and footing installation per California Building Code
Structural framing and seismic compliance
Structural framing and seismic compliance
Electrical system rough-in, panel installation, and final in
Electrical system rough-in, panel installation, and final inspection
Plumbing rough-in, rough-in inspection, and final connection
Plumbing rough-in, rough-in inspection, and final connections
Mechanical systems, HVAC installation, and ductwork
Mechanical systems, HVAC installation, and ductwork
Roof framing, sheathing, and waterproofing
Roof framing, sheathing, and waterproofing
Final inspection and Certificate of Occupancy issuance
Final inspection and Certificate of Occupancy issuance
Authority Sources
Data on this page is sourced from official records published by the permitting authority. Always verify requirements directly before submitting.
San Jose Department of Planning, Building and Code Enforcement
Last verified: February 15, 2026
2 sources referenced
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Frequently Asked Questions
- Do I need a adu permit in San Jose?
- Yes. San Jose requires a adu permit for this type of project. Submitting without a permit may result in fines, required removal, or complications when selling your property.
- How long does adu permit approval take in San Jose?
- Processing times in San Jose vary depending on project complexity and current review volume. The process involves 7 steps. Contact San Jose Development Services for current timelines.
- What documents are required for a adu permit in San Jose?
- San Jose requires 7 documents including Building Permit Application, Architectural Plans, Site Plan, Structural Calculations, and others. See the full list above for details.
- What happens if I build without a adu permit in San Jose?
- Building without a permit in San Jose can result in stop-work orders, fines, required removal of work, difficulty selling your property, and insurance complications. It is strongly recommended to obtain proper permits before starting work.
- Can PermitMagic help prepare my adu permit submission in San Jose?
- Yes. PermitMagic generates a submission-ready packet tailored to San Jose's requirements, including a document checklist, workflow steps, and authority references. Start a permit plan to get your personalized packet.
- How much does a adu permit cost in San Jose?
- ADU permit fees in San Jose typically range from $6,750 to $23,100, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with San Jose.
Related Permits
Other permits in San Jose
ADU permits in nearby cities
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