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Los Gatos, California: ADU Regulations

City or County:

Los Gatos, California

Date Updated:

11.24.2020

Zoning:

R-1/R-D/R-1D/RM/RMH/HR/RC

Number of ADUs:

Single-family: 1 JADU, and 1 Detached or Attached

Multi-family: At least 1 conversion (higher of 1 and 25% of total existing units), and 2 Detached

Types of ADUs:

Attached, Detached, Junior

Stories:

Single story, but may occupy the second story of an existing accessory building

Lot Size:

No minimum as long as ADU complies with lot coverage guidelines.

Maximum ADU Floor Area:

1,200 sq.ft.

An additional 10% in the FAR standards for all structures, excluding garages, is allowed for an ADU up to 1,200 sq. ft. Planning staff should be consulted to calculate the allowable floor area for an ADU per the HSD&G.

Detached accessory dwelling units exceeding a combined square footage of 450 sq. ft. in the R- 1, R- D, R- M, RMH, and R- 1D zones shall not be subject to the Administrative Procedure for Minor Residential Projects.

Detached accessory dwelling units exceeding a combined square footage of 600 or 1,000 square feet in the HR and RC zones shall not be subject to Development Review Committee or Planning Commission approval.

Lot Coverage:

ADUs must comply with lot coverage maximums for the zone.

ADU up to 800 sq.ft. must be permitted (notwithstanding FAR standards)

Bedroom:

2 bedrooms max.

Storage:

Must comply with floor area ratios for primary structures.

Kitchen:

To include permanent provisions for living, sleeping, eating, cooking, and sanitation on same parcel as single-family dwelling is situated.

Bath:

To include permanent provisions for living, sleeping, eating, cooking, and sanitation on same parcel as single-family dwelling is situated.

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

Parking:

Parking may be provided in a front setback or side setback on a driveway, or through tandem parking. Parking from demolished garage is not required to be replaced. One parking space is required per ADU or per bedroom, whichever is less, with the following exceptions (where no parking is required):

• ADU is within one-half mile of a public transit stop

• ADU is within a historic district

• When existing square footage is converted to an ADU

• When on-street parking permits are required but not offered to the ADU occupant

• When a car share vehicle is located within one block of the ADU

• When the Director finds that the lot does not have adequate area to provide parking

• Attached and Junior ADUs do no require additional parking spaces

Setbacks:

Attached: same as the primary dwelling.

Detached in R-1/R-D/RM/RMH/R-1D: front and street side setbacks are the same as the primary dwelling, rear and side setbacks are 4’ minimum. and separation from other structures is 5'.

Detached in HR/RC: minimum setbacks are the same as primary dwelling unit, located within the least restrictive development area (slopes less than 30%).

Note: No accessory dwelling unit may be constructed in front of a primary dwelling that is a historic resource.

Height:

16’ and one story with the following exceptions:

Attached in R-1/R-D/R-M/R-1D/HR/RC: allowed within existing space, or where a two-story primary dwelling unit exists.

Detached in R-1/R-D/RM/R-1D: allowed within existing space, or above an existing one-story accessory building, where a two-story primary dwelling exists.

Location:

ADUs are not allowed in front of the primary dwelling unit in R-1/R-D/RM/R-1D zones.

Rear Yard Coverage:

N/A

Design:

The design, form, materials, and color of new second dwelling unit to be compatible with primary dwelling unit and neighborhood. ADUs must maintain the single-family appearance of the property.

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

Entryways:

Entrances serving the ADU shall not be constructed on any elevation facing a public street. Attached ADUs must have a separate entrance.

Source Code:

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!