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Buena Park ADUs

Everything about building Accessory Dwelling Units in Buena Park, CA

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The city government of Buena Park will approve ADUs under California's statewide mandated regulations.
The California Building Code (CBC) 2019 is adopted.

Last Updated 09/21/21


hintsights

City Hint: The City of Buena Park permitted a total of 25 ADU projects in the past year of 2020.


Number of ADUs allowed:

Single-Family Zone.
The number of accessory dwelling units or junior accessory dwelling units that may be located on any lot in single-family zones is limited one (1) of the following options:
i. One (1) accessory dwelling unit may be located within the proposed space of a single-family dwelling, or the existing space of a single family dwelling or accessory structure, and the accessory dwelling unit conversion may include an expansion of not more than one hundred fifty (150) square feet beyond the same physical dimensions as the existing accessory structure only for the purpose of accommodating ingress and egress.
ii. One (1) detached or attached, new construction accessory dwelling unit may be located on lots which contain or are proposed to be developed with a single-family dwelling.
iii. One (1) junior accessory dwelling unit may be located within the proposed space of a single-family dwelling, or the existing space of a single-family dwelling, and the junior accessory dwelling unit conversion may include an expansion of not more than one hundred fifty (150) square feet beyond the same physical dimensions as the existing primary dwelling only for the purpose of accommodating ingress and egress.
iv. One (1) junior accessory dwelling unit under subsection iii above, plus one (1) detached new construction accessory dwelling unit under subsection B.5.a.ii above, may be located on lots which contain or are proposed to be developed with a single-family dwelling; provided that the accessory dwelling unit shall be no more than eight hundred (800) square feet in floor area, no more than sixteen (16) feet in height, and have at least four (4) foot side and rear yards setbacks.
b. Multifamily Zones. The number of accessory dwelling units that may be constructed on any lot in multi-family zones is limited as follows:
i. A maximum of two (2) detached accessory dwelling units may be constructed on lots which contain or are proposed to be developed with a multi-family dwelling unit, so long as the accessory dwelling unit is no more than sixteen (16) feet in height and has at least four (4) foot side and rear yards setbacks.
ii. Within an existing multifamily dwelling structure, an accessory dwelling unit may be converted from areas not used as livable
space, including but not limited to storage rooms, boiler rooms, passageways, attics, basements, or garages. At least one (1) such accessory dwelling unit conversion, and up to 25 percent of the existing units within the multifamily dwelling structure, is permitted under this subsection, and all such units shall comply with applicable fire and building code requirements.
iii. Junior accessory dwelling units are not permitted in multi-family zones.

Types of ADUs allowed:

Detached ADU, Attached ADU, Junior ADU are allowed. Accessory Dwelling Units may be new construction or converted from existing space. Junior ADUs must be converted from existing space.

Lot size:

Residential parcels will not be subject to any minimum lot size for Accessory Dwelling Unit (ADU)s by ordinance or of the underlying zoning district. ~ AB68

ADU size:

a. All newly constructed detached accessory dwelling units shall not exceed 850 square feet for an accessory dwelling unit that provides up to one bedroom, and shall not exceed 1,000 square feet for an accessory dwelling unit that provides more than one bedroom.
b. The total floor area of any attached or detached accessory dwelling unit or a junior accessory dwelling unit shall be of a minimum area of 150 square feet, or as specified in Section 17958.1 of the California Health and Safety Code.
c. When an accessory dwelling unit is attached to an existing single-family dwelling, the maximum allowed size of the accessory dwelling unit shall be the smaller of: 50% of the existing primary dwelling, using the resulting square footage of the existing primary dwelling for comparison; or 850 square feet for an accessory dwelling unit that provides up to one bedroom, or 1,000 square feet for an accessory dwelling unit that provides more than one bedroom.
d. Junior accessory dwelling units shall not exceed 500 square feet

Setbacks:

An existing living area or accessory structure, or a structure constructed in the same location and to the same dimensions as an existing structure, that is converted to an accessory dwelling unit may maintain the existing setback. An accessory dwelling unit that is not a conversion from an existing structure, or that is not a new structure constructed in the same location and to the same dimensions as an existing structure, must maintain a minimum 5 4-foot setback, including any eaves or overhangs; and provided that all side and rear setbacks must be sufficient for fire and safety.

Parking:

One parking space per accessory dwelling unit shall be provided. These spaces may be provided as tandem parking on an existing
driveway, or on a driveway in side yard and rear yard as permitted in Table 19.320.030-C and Table 19.320.040-D of the Zoning Ordinance. Parking is
limited to lawfully paved areas approved by the City. No additional parking for the accessory dwelling unit is required if any one (1) of the following conditions are met:
a. The unit is located within 1/2 mile of walking distance of public transit.
b. The unit is located within an architecturally and historically significant historic district.
c. The unit is part of (i.e., contained within) the footprint of the primary residence or an accessory building.
d. When on-street parking permits are required but not offered to the occupant of the unit.
e. When there is a car share vehicle located within 1 block of the unit.
8. Location of Required Parking. Parking required for the accessory dwelling unit may be located in the following locations, as approved by the City,
ordered from most preferred to least preferred: a. A garage, carport, or covered space on a driveway; which complies with required setbacks for both primary and accessory structures.
b. An uncovered tandem space on a driveway.
c. Within the required street side yard setback.
d. Within the required rear yard setback.
e. Within the required front yard setback.
f. Notwithstanding the foregoing, parking in setbacks and tandem driveway parking may be denied if the Building Official determines that parking in those areas is unsafe due to site specific fire and/or life safety conditions.
g. If parking required for the unit is accommodated in any setback area, as set forth above, then the required parking space shall be located and maintained in the specific location designated by the City.

Fire Safety:

Fire sprinklers are not required for the accessory dwelling unit or junior accessory dwelling unit if they are not required for the primary residence or multi-family dwelling.

Shape, materials and style:

The accessory dwelling unit or junior accessory dwelling unit shall incorporate the same architectural features, building materials, and color as the main dwelling unit on the property. These features shall include, but are not limited to, roofing material, roof design, fascia, exterior building finish, color, exterior doors and windows including, but not limited to, ratios of window dimensions (i.e., width to height) and window area to wall area, garage door, and architectural enhancements. Fire sprinklers are not required for the accessory dwelling unit or junior accessory dwelling unit if they are not required for the primary residence or multi-family dwelling

Height:

Height of a detached accessory dwelling unit shall not exceed sixteen (16) feet. Any external access staircase for the accessory dwelling unit shall not be located at the front of the single-family or multi-family dwelling unit, as applicable.

Design review:

State Standards don't require any additional design review.

Number of Bedrooms:

Not specified by State Standards.

Ownership:

Owner Occupancy Required. One of the units on lots with a single-family dwelling shall be occupied as the primary residence of the owner of the lot. If the owner occupies neither unit, the accessory dwelling unit shall not be used as a dwelling unit, and shall not be rented. Notwithstanding the foregoing, an accessory dwelling unit that is approved after January 1, 2020, but before January 1, 2025, is not subject to the owner-occupancy requirement

Utility connections:

All utilities servicing the accessory dwelling unit or junior accessory dwelling unit may be metered in conjunction with the primary dwelling, in compliance with Government Code Section 65852.2(f).

Allowed Zones:

*** Beginning in 2020, according to state law, all residential zoning districts, including single-family and multi-family, are allowed to build Accessory Dwelling Units. ***

Residential Building Code:

The California Building Code (CBC) 2019 is adopted.

Read Buena Park Housing Market Update

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