City of Fremont ADU Intelligence Dashboard

Comprehensive guide to Accessory Dwelling Unit regulations, permit requirements, and housing compliance resources for the City of Fremont.

This intelligence resource covers ADU and JADU permit requirements across the City of Fremont. Ordinance 06-2023 (effective Aug 11, 2023) governs all new ADU submissions under FMC §18.190.005. The ADU Amnesty Program remains open under AB 2533 — helping property owners bring unpermitted units into compliance without penalty.

🏠 ADU Types: 2 📋 Ordinance: 06-2023 📞 Zoning: 510-494-4455 👁 Views: 5

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Ordinance 06-2023 — Updated ADU Regulations (Effective Aug 11, 2023)

The Fremont City Council adopted Ordinance 06-2023 on July 11, 2023, updating ADU regulations under Fremont Municipal Code 18.190.005. ADUs are permitted on both single-family and multi-family properties. Junior ADUs (JADUs) of up to 500 sq ft may be created within existing single-family residences. Each ADU requires a standalone permit application — combined applications with primary residence work will be rejected. The ADU Amnesty Program (AB 2533) remains open for owners with unpermitted units seeking compliance.

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Standard ADU

Accessory Dwelling Unit

Complete independent living unit on the same parcel as the primary home. Can be attached or detached. Requires full kitchen, bathroom, and sanitation provisions.

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Junior ADU (JADU)

Junior Accessory Dwelling Unit

Max 500 sq ft, contained within an existing single-family residence or attached garage. Efficiency kitchen required; may share bathroom with main home.

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Permitting

Separate Permit Required

ADU applications must be submitted separately from primary residence work. Combined applications are rejected. Both permits may process concurrently but are reviewed independently.

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Amnesty Program

ADU Amnesty — AB 2533

Extended compliance window for unpermitted ADUs. Contact Code Enforcement at 510-494-4430 to explore eligibility and avoid penalties.

✅ ADU Permit Submission Checklist

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Submit ADU as its own standalone application

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Separate all ADU plans from primary residence work

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Include full kitchen, bathroom & sanitation drawings

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Verify compliance with FMC §18.190.005

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JADU: confirm size ≤ 500 sq ft within existing structure

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Check Amnesty Program eligibility if unpermitted

ADU Intelligence Reports

What Is an ADU?

Accessory Dwelling Units — What Homeowners Need to Know

An ADU is a residential unit located on the same parcel as a primary home. It can be attached to the main residence or built as a detached structure. ADUs must provide complete, independent living facilities, including living and sleeping areas, a kitchen, bathroom facilities, and permanent provisions for cooking, eating, and sanitation.

ADUs are permitted on both single-family and multi-family properties, subject to City regulations under Fremont Municipal Code 18.190.005.

"ADUs — often called 'in-law units' or 'secondary dwelling units' — are a popular way for homeowners to add flexible living space and increase property value."

Junior ADU (JADU)

Smaller Units, Simpler Permitting — Junior ADUs Explained

The City of Fremont also allows Junior ADUs (JADUs) — smaller units that are no more than 500 square feet and fully contained within an existing single-family residence, including an attached garage.

JADUs include an efficiency kitchen with cooking appliances, food prep counter, and storage cabinets. They may have a separate bathroom or share one with the main residence.

Key Benefit: JADUs are a great option for homeowners looking to create smaller, cost-effective living spaces with a faster review cycle than standard ADUs.

Permit Requirements

Every ADU Needs Its Own Standalone Permit

One of the most important things to understand: an ADU requires its own separate permit. Even if the ADU is attached to the primary residence — and even if you're remodelling the main home at the same time — you must submit one permit application for the primary residence work and a separate, standalone permit application for the ADU.

Important: Permit applications that combine ADU work with primary residence improvements will be rejected. Plans must be revised and resubmitted separately, causing costly delays.

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Submit your ADU as its own permit application
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Ensure all ADU-related plans are clearly separated from main home improvements
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Both permits may be processed at the same time but are reviewed independently

Amnesty Program

ADU Amnesty Program — AB 2533

The City of Fremont complies with California Assembly Bill (AB) 2533 by offering an ADU Amnesty Program. This program provides property owners additional time to bring unpermitted ADUs into compliance with building codes.

If you believe you may have an unpermitted ADU, it's worth exploring this program to avoid potential penalties and ensure safety compliance.

"The Amnesty Program turns a liability into a community asset — safely, legally, and with city support."

Helpful Resources

Resources for Homeowners Planning an ADU

The City provides an ADU Informational Handout designed to help explain ADU requirements in single-family residential zoning districts. Keep in mind that if there is ever conflicting information, the Fremont Municipal Code and State law will take precedence.

Homeowners can also sign up for the City's ADU Information Interest List to receive the latest updates on regulations, workshops, and compliance events.

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Zoning questions: 510-494-4455
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Amnesty / enforcement: 510-494-4430
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Apply online at fremont.gov

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