All ADU Regulations

Gardena, California

Gardena has updated its ADU ordinance to comply with new state laws. Below are the up-to-date requirements for permitting an ADU in Gardena

July 27, 2022
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Gardena is a city located in the South Bay region of Los Angeles County, California. Gardena is known for its diverse population, which is reflective of the city's history as a melting pot for Japanese, Italian, German, and other immigrants who came to work in the city's factories and nurseries during the early 20th century.

In recent years, Gardena has been experiencing a renaissance of sorts, as more and more people are discovering the city's hidden gems. One of the most exciting developments has been the construction of accessory dwelling units.


All properties zoned for single family and multifamily use may be eligible to build ADUs.

Number of units

The number of ADUs you’re able to build depends on how your lot is zoned:

  • Lots zoned for single family use may add 1 ADU and 1 Jr. ADU (JADU).
  • Lots zoned for multi-family may add 2 new detached ADUs and at least one conversion ADU (interior conversion of existing building, but no more than 25% of the original number of units. (E.g. an apartment with 4 units may add 2 detached ADUs and 1 conversion ADU.)

Building size

  • The maximum size is 500.0 sq. ft. for a JADU
  • 850 sq. ft. max for a detached ADU
  • Attached ADU Max Size: 850 sq. ft.

Building height

  • Building height detached ADU: 16 ft
  • Building height attached ADU: The standards of the underlying zone shall apply


  • Backyard Existing Structure Setback: 6ft


State Law - No requirements for parking if any of the following true:

  • The accessory dwelling unit is located within one-half mile walking distance of public transit.
  • The accessory dwelling unit is located within an architecturally and historically significant historic district.
  • The accessory dwelling unit is part of the proposed or existing primary residence or an accessory structure.
  • When on-street parking permits are required but not offered to the occupant of the accessory dwelling unit.
  • When there is a car share vehicle located within one block of the accessory dwelling unit.

Design and build with confidence.