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ADU Regulations in Glendale, California

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Accessory Dwelling Units (ADUs) have become one of the most popular ways for Glendale homeowners to expand their living space, create rental income, or provide housing for family members. The City of Glendale follows California’s state ADU laws but also has its own local zoning requirements. If you are planning to build an ADU in Glendale, here are the key regulations to know.

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Types of ADUs Allowed in Glendale

  • Detached ADU – A separate structure built in the backyard or side yard.

  • Attached ADU – An addition connected to the primary residence.

  • Garage Conversion ADU – Transforming an existing garage into a living unit.

  • Junior ADU (JADU) – A smaller unit (up to 500 sq. ft.) created within the existing home.

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Size Requirements

  • Detached ADUs: Up to 1,200 sq. ft. allowed (depending on lot size and zoning).

  • Attached ADUs: Limited to 50% of the primary residence’s square footage, up to 1,200 sq. ft.

  • JADUs: Maximum size of 500 sq. ft.

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Setbacks and Height

  • Setbacks: At least 4 feet from rear and side property lines for most ADUs.

  • Height: Detached ADUs are typically limited to 16 feet, but two-story ADUs may be permitted with city approval.

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Parking Rules

  • Glendale generally requires one parking space per ADU, unless your property meets state exemptions such as:

    • Being within ½ mile of public transit.

    • Converting an existing garage, carport, or driveway.

    • Located within a historic district with specific design rules.

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Owner Occupancy

  • As of California’s latest ADU laws, owner-occupancy is not required for standard ADUs until at least 2025. However, Junior ADUs (JADUs) do require owner occupancy in either the main house or the JADU.

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Permitting Timeline

  • Glendale ADU permits are processed according to California state law, which requires cities to review ADU applications within 60 days. Actual timelines may vary depending on project scope, design review, and whether variances are requested.

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Why Build an ADU in Glendale?

Building an ADU in Glendale is a smart investment. Homeowners gain:

  • Increased property value.

  • Long-term rental income opportunities.

  • Flexible living space for family, guests, or caregivers.

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