ADU Accessory Dwelling Units & Home Renovations.
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The year 1921 marked the first drilling for oil at Dominguez Hill, on the northwest side of the Rancho San Pedro (also called Rancho Domínguez), site of the famous battle during the Mexican–American War called the Battle of Rancho Domínguez in 1846. The mineral rights to this property were owned by Carson Estate Company, the Hellman Family, the Dominguez Estate Company, and the Burnham Exploration Company of Frederick Russell Burnham. On September 7, 1923, Burnham Exploration partnering with Union Oil brought in the first producer on the site: Callender No. 1-A well at a depth of 4,068 feet (1,240 m) and 1,193 barrels per day (189.7 m3/d). Before long a number of refineries were up and running, with over 350 oil derricks, tank farms, and sprawling industrial complexes becoming a familiar part of the scenery. The principal leases were with Shell Oil Company and Union Oil of California and the first two wells were located west of Central Avenue and north of Victoria Street. Oil led to an increase in jobs in the community and a subsequent post-war population surge. An average of 300 barrels per day (48 m3/d) was produced from each of these wells through 1960.
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Accessory Dwelling Unit City Requirement
ADU Maximum Size
JADU Maxium Size
150 Feet addition or
max 50% Primary Dwelling Size
4 Feet Front & Side
18 Feet Detached 25 Feet Attached
No Parking Requirement or one space max
1/2 Mile from Public Transportation
Carson, CA, USA
Types of ADU
There are two types of ADUs - an ADU and a JADU. All residential lots can have one ADU and one JADU.
There are three kinds of ADU construction:
Detached: The unit is separated from the primary structure
Attached: The unit is attached to the primary structure
Converted Existing Space: Space (e.g., master bedroom, attached garage, storage area, or similar use, or an accessory structure) on the lot of the primary residence that is converted into an independent living unit
Junior Accessory Dwelling Unit (JADU): A specific type of conversion of existing space that is contained entirely within an existing or proposed single-family residence
Single-Family ADU Accessory Dwelling Unit Development Standards
ADUs are permitted in single-family residential zoned properties (R-1). All ADUs shall be constructed with independent access separate from the main residence entrance. All ADUs shall have a living/sleeping area, a kitchen or kitchenette (i.e., stove or hotplate, refrigerator, and sink), and a bathroom that includes a shower or bathtub. ADUs are no longer subject to Lot Coverage and Floor Area Ratios of the city's zoning designation. The following are single-family ADU development standards:
Detached Accessory Dwelling Unit
Maximum of two stories or 25 feet
ADU shall match the architectural design of the existing or proposed main dwelling.
Attached Accessory Dwelling Unit
Maximum of two stories or 25 feet
Cannot exceed 50% of the existing main dwelling unit
ADU shall match the architectural design of the existing or proposed main dwelling
Setbacks for your ADU
ADUs shall adhere to the state's setbacks of four feet from the side and rear yard and must remain 6 feet from the existing main dwelling. Existing accessory structures and single-family homes that are converted into ADUs are exempt from meeting the required setbacks however, any expansion shall meet the four-foot side and rear yard setback, as pursuant to Government Code Section 65852.2.
Parking for Tenant
All new ADUs will be required to provide one additional parking space, cover, or uncovered if the proposed ADU is not within a one-half (.5) mile radius of public transit station (bus stops included). However, for accessory structures or a portion of the existing residence that is converted into an ADU, no additional parking is required. An ADU cannot have direct access to a garage if the proposed or existing garage has less than three spaces.
Junior ADU Development Standards
Junior Accessory Dwelling Units (JADUs) are very small living units created within the existing main dwelling. The JADU must have a living/sleeping area, and a kitchen or kitchenette (i.e., stove or hotplate, refrigerator, and sink). A bathroom is not required, however, if a bathroom is not provided, the JADU shall have direct access into the existing main dwelling unit. A JADU cannot exceed a total of 500 square feet and any expansion of the existing main dwelling to accommodate the JADU shall not exceed 150 square feet.
JADUs shall adhere to the state's setbacks of four feet from the side and rear yard. Existing single-family homes that are converted into JADUs are exempt from meeting the required setbacks as pursuant to Government Code Section 65852.2.
Parking is not required for JADUs, however, an ADU cannot have direct access to a garage if the proposed or existing garage has less than three spaces.
Multi-Family Lots ADU Development Standards
ADUs are permitted on multi-family zoned properties (R-2 and R-3). All ADUs shall be constructed with independent access separate from the main residence entrance. All ADUs shall have a living/sleeping area, a kitchen or kitchenette (i.e., stove or hotplate, refrigerator, and sink), and a bathroom that includes a shower or bathtub. ADUs are no longer subject to Lot Coverage and Floor Area Ratios of the city's zoning designation.
As you look to begin your whole home remodel, here's the general order of operations:
Planning and Design. ...
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