Buena Park Zoning and ADU Guide for Homeowners

Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team.

Buena Park’s 2025 ADU handout says complete accessory dwelling unit applications are approved ministerially, without a public hearing, within 60 days. This guide summarizes the city’s published ADU and JADU standards for size, height, setbacks, parking and rentals, and explains what an ADU or conversion means if you plan to sell.

Buena Park ADU standards at a glance

Department	Planning Division, City of Buena Park, (714) 562-3620
Where ADUs are allowed	Single-family lots with a single-family dwelling; multi-family or mixed-use residential lots with a multi-family dwelling
Where JADUs are allowed	Single-family lots only
New ADU size	Up to 850 sq ft for one bedroom or less; up to 1,000 sq ft for more than one bedroom
JADU size	Maximum 500 sq ft
Minimum size	150 sq ft, or as set by Health and Safety Code 17958.1
Review time	Ministerial approval within 60 days of a complete application
Rental term	No less than 30 days; short-term rental prohibited

Height and setbacks

The city’s general ADU height limit is 16 feet measured from grade. An ADU attached to a single-family dwelling can be up to two stories and 30 feet, or as high as the existing two-story primary dwelling, whichever is lower.

A detached ADU on a multifamily or mixed-use lot with a multistory building can reach 20 feet, and a detached ADU within one half mile of a major transit stop or high quality transit corridor is also limited to 20 feet.

Converted living areas or accessory structures, and structures rebuilt in the same location and dimensions, can keep their existing setbacks. Other ADUs need four feet to the rear and side property lines, and a second story balcony needs five feet.

The city also allows an ADU in the front setback if it is otherwise physically infeasible to build while keeping the rear and side setbacks. A conversion may add up to 150 square feet beyond existing dimensions solely for ingress and egress.

Parking

One parking space is required per ADU, and it can be a tandem space on an existing driveway or on a paved driveway in a side or rear yard that the city approves.

No parking is required when the ADU is within one half mile walking distance of public transit, in a historic district, within the footprint of the primary dwelling or an accessory building, in an area where on-street permits are required but not offered to the occupant, within one block of a car share vehicle, or when a garage or carport is demolished to build or convert the ADU, in which case replacement parking for the main home is not required.

Owner occupancy, fees and rentals

A JADU requires the owner to live in the single-family dwelling, an ADU on the lot, or the JADU itself, unless the JADU is owned by a government agency, land trust or housing organization.

For ADUs of 750 square feet or more, a proportionate park land dedication or in-lieu fee applies under the city’s development impact fee schedule. Rentals must be for at least 30 days. Building permit steps for the construction are in our Buena Park building permits guide.

ADUs, garage conversions and selling a Buena Park house

A permitted ADU can add value, while an unpermitted garage conversion or backyard unit often causes problems. Lenders and appraisers generally count permitted space only, and California sellers disclose known unpermitted work. Our statewide guide explains the rules. You can legalize the unit, disclose it and sell on the open market, or sell as-is to a cash buyer. Property maintenance rules are in our Buena Park code enforcement guide.

• Ask Planning whether any extra unit on your property was approved.
• Check for permits and final inspections for any garage conversion.
• Confirm that the unit meets setback, height and parking rules.
• Compare legalization cost with a no-repairs cash sale.

How to sell a house in Buena Park

1. Check whether any extra unit or conversion was permitted.
2. Collect plans, permits and final inspection records.
3. Request a no-obligation cash offer for the house as it stands.
4. Choose your closing date.
5. Close with no repairs, permit cleanup or showings required.

Frequently asked questions

How big can an ADU be in Buena Park?

New attached or detached ADUs can be up to 850 square feet for one bedroom or less and up to 1,000 square feet for more than one bedroom. A JADU is limited to 500 square feet.

How long does Buena Park take to review an ADU?

The city’s handout says a complete application is approved ministerially within 60 days unless more time is agreed in writing.

Does a Buena Park ADU need parking?

One space is required, with several exceptions such as being within one half mile of public transit or converting an existing structure.

Can I rent my Buena Park ADU short term?

No. The city requires a rental term of at least 30 days.

Is there an ADU setback in Buena Park?

Four feet to the side and rear property lines for new construction, while conversions can keep existing setbacks.

Can I sell my Buena Park house with an unpermitted unit?

Yes. You can disclose it and sell as-is, including to a cash buyer.

More guides

• We Buy Houses in Buena Park
• We Buy Houses in Orange County
• Buena Park Building Permits Guide
• Buena Park Code Enforcement Guide
• All California Guides

Sources

• City of Buena Park: Planning Division
• City of Buena Park: ADU and JADU Regulations (2025 handout)

This guide is general information from public sources, not legal advice. Confirm current rules with the city.