Buena Park, CA Accessory Structures: ADU Rules (2026)
ADU rules in Buena Park, CA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Max detached height
- 16 ft (20 ft near transit)
- Attached ADU height
- 2 stories / 30 ft
- Setback
- 4 ft rear & side
- Governing code
- § 19.348.010
- State law override
- Gov. Code §§ 66310-66342
Summary
Buena Park allows accessory dwelling units on single-family and multifamily lots under § 19.348.010, capping height at 16 feet (up to 30 feet if attached) and requiring minimum 4-foot rear and side setbacks.
Development Standards. Under the provisions of this section, each accessory dwelling unit or junior accessory dwelling unit shall comply with local building codes and all development standards contained in Division 3 (Single Family Residential Zones) of this Title 19 (Zoning), except as otherwise specified herein:
1. Location. Accessory dwelling units are allowed on lots zoned for single-family residential which contain or are proposed to be developed with a single-family dwelling, or on lots zoned for multifamily residential or mixed-use residential use which contain or are proposed to be developed with a multifamily dwelling. Subject to the standards of this section, accessory dwelling units may be attached, detached, or located within an existing primary residence, which shall include an attached garage, or existing accessory structure. Junior accessory dwelling units shall only be allowed on lots zoned for single-family residential use and which are developed with or are proposed to be developed with a single-family dwelling.
2. Minimum Lot Size and Allowable Density. Minimum lot size and density requirements shall not be applicable when determining minimum lot size or allowable density for development of an accessory dwelling unit or junior accessory dwelling unit.
3. Height of Structure. The height of an accessory dwelling unit shall not exceed 16 feet, measured from grade, except as follows:
a.
Full Breakdown
Buena Park Municipal Code § 19.348.010 sets local zoning standards for accessory dwelling units (ADUs) and junior ADUs (JADUs) citywide, adopted to implement California Government Code §§ 66314-66339 (now recodified at §§ 66310-66342). Detached ADUs max out at 16 feet (20 feet near a major transit stop), attached ADUs up to two stories/30 feet, with 4-foot rear and side setbacks required for new construction. ADUs are allowed on single-family lots and on multifamily/mixed-use lots with an existing multifamily building, citywide. Where a Buena Park limit is stricter than current state ADU law, state law controls.
Violations & Fines
No permit, no ADU; unpermitted units may be red-tagged and require demolition or retrofit to code. Community and Economic Development Department enforces; illegal ADUs risk building-code citations and removal orders.
Frequently Asked Questions
Can I build an ADU on any residential lot in Buena Park?
Does the city's 16-foot height cap always apply?
Sources & Official References
Other rules in Buena Park
How Buena Park compares: Easiest Cities to Build an ADU·California rules heatmap·Compare Buena Park to another location·View the California accessory structures overview
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ADU Rules in Nearby Cities
How other cities in Orange County handle adu rules.