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.

ADU Permit Online Portal Guide 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.

Build My Permit Packet View Requirements

Key Facts

Permit required: Yes
Submission method: Online
Typical fee range: $6,750 – $23,100
Review time: Varies by jurisdiction
Inspections: 7 inspections required

VerifiedLast verified: Feb 15, 20262 verified sources

San Jose Department of Planning, Building and Code Enforcement

Verified

7-step online submission process — account registration required[1][2]

Open Portal

Step 1: Pre-Application Review and Zoning Verification

[3][4]

Consult with San Jose Planning staff to verify zoning compliance, ADU eligibility, and confirm property meets local requirements. Obtain zoning verification letter.

What You Need

Property Deed and Title
Zoning Verification Letter

Portal steps may change without notice. Always confirm the current process at San Jose's online portal.

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

Build My Permit Packet

Free to preview · Pro to download

Required Documents

San Jose requires the following documents for this permit application.

Building Permit Application

Completed Building Permit Application Form with owner and contractor information

Architectural Plans

Complete architectural drawings signed by a licensed architect, including floor plans, elevations, sections, and details. Must show compliance with San Jose Zoning Ordinance.

Site Plan

Site plan showing property boundaries, setbacks, building footprint, parking areas, landscaping, and utilities with dimensions

Structural Calculations

Structural calculations and engineering report prepared by a licensed structural engineer. Include foundation design and seismic calculations.

Utility Connection Plans

Plans showing water, sewer, electric, gas, and other utility connections. Indicate separate meter locations and sizes.

Property Deed and Title

Copy of current property deed and evidence of title showing ownership of the property

Zoning Verification Letter

Written confirmation from Planning Department that the property is zoned appropriately and meets ADU eligibility requirements

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

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

Roof framing, sheathing, and waterproofing

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

Official page

San Jose Municipal Code Chapter 20.100 - Zoning Ordinance (ADU Provisions)

Verified February 15, 2026

Official page

San Jose ADU Permitting Guide and Requirements

Verified February 15, 2026

Portal guide

San Jose Permits Online Portal

Verified February 15, 2026

Official page

California AB 2221 - Accessory Dwelling Unit (State Law)

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.