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Gilroy, California: ADU Regulations

City or County:

Gilroy, California

Date Updated:

12.9.2018

Zoning:

RR/R1/R2/RH/ND

Types of ADUs:

Attached, Detached and Garage Conversion

Stories:

Single story, but can be constructed above a garage.

Lot Size:

N/A

Maximum ADU Floor Area:

600 sq.ft., not to exceed 50% of the existing living area of the existing primary dwelling

Lot Coverage:

Must conform to underlying zoning regulations.

Bedroom:

1 bedroom maximum

Storage:

No min/max

Kitchen:

Must contain water, sewer and gas and/or electric utility connections. Must contain permanent provisions for living, sleeping, eating, cooking, and sanitation.

Bath:

Must contain water, sewer and gas and/or electric utility connections. Must contain permanent provisions for living, sleeping, eating, cooking, and sanitation.

Note: Drainage and sewer connections should be assessed on a project by project basis.

Parking:

ADU must be located on a lot with at least two parking spaces, one of which is covered, serving the primary dwelling. One additional parking space must be provided for the ADU, unless the ADU meets any of the following:

1) is located within ½ mile of a public transit station

2) is located within an architecturally and historically significant historic district

3) is contained within the existing space of the single-family residence OR an accessory structure

4) is located in an area where on-street parking permits are required but not offered to the occupant of the ADU

5) if there is a car share vehicle located within one block of the the ADU

Setbacks:

Must conform to the setback requirements of the underlying residential zoning district, subject to the following:

1) A setback of 6’ from the side and rear lot lines for newly constructed detached ADUs and for an existing accessory structure expanded into an ADU, except that such an ADU is located closer than 5’ to the existing primary residence.

2) A setback of 5’ from the side and rear lot lines is required for an ADU built over a garage.

3) No setback is required for an existing garage that is converted into an ADU.

Note: Fire Department regulations should be assessed on a project by project basis.

Height:

Maximum height for a single-story ADU is 15’. The maximum height for the total structure of an ADU build above a garage is 24’.

Location:

An ADU must not encroach upon the required front yard area.

Rear Yard Coverage:

None specified

Design:

Architectural features (windows styles, roof slopes, exterior materials, colors, appearance) and design must be compatible with the existing primary dwelling.

Note: Historic Neighborhoods or Districts should be assessed on a project by project basis.

Entryways:

ADUs constructed within the existing space of the primary dwelling must be serviced by independent exterior access. Entrances to any ADUs must be screened from street view. Outside stairways serving the second story ADUs must not be constructed on any building elevation facing a public street.

Code Source:

Important Note: Rules and regulations are updated and changed frequently. It’s one of our jobs to be up to speed and navigate those regulations. Let us know if our website isn’t up to date or if you have any information that could help. Cheers!