How United Build Partners helps Buena Park homeowners
We're an ADU advisory and contractor-matching service, not the construction company. We start with a free review of your Buena Park property and goals, help you understand what the city's ADU rules mean for your lot, and — when it's a good fit — connect you with up to three contractors in our network.
ADU rules and permitting in Buena Park
Buena Park adopted Ordinance No. 1736 in March 2024, its current governing ADU ordinance, which builds on the same statewide floor every California city follows — ministerial review and a 60-day clock on complete applications (see our California ADU laws guide). Buena Park's most distinctive local rule is its height allowance for attached units.
What's specific to Buena Park
- Height: a detached or other ADU is generally capped at 16 feet. But on a single-family lot, an ADU attached to the primary home may be built up to 2 stories, not exceeding 30 feet — or as high as the existing 2-story primary home, whichever is lower.
- Unit allowance: single-family lots may generally add 1 ADU and 1 Junior ADU; multi-family lots may generally add 2 new detached ADUs plus at least 1 conversion ADU (up to 25% of the property's existing unit count).
- Size: a Junior ADU is capped at 500 square feet and must be contained within an existing or proposed single-family home. A standard ADU, attached or detached, may reach up to 1,200 square feet.
- Setbacks: a minimum of 4 feet to the rear-yard and side-yard property lines for most ADU configurations.
- Application requirements: Buena Park requires a site plan, floor plan, demolition plan (where applicable), and elevations demonstrating compliance with applicable development standards as part of any ADU or JADU application.
Property and lot considerations
Buena Park's attached-ADU height allowance can be especially valuable if your existing home is already two stories, since a matching-height addition can add significant square footage without expanding your building footprint. Whether that's realistic for your specific home depends on its existing structure and your lot's setbacks — a property review can confirm what's achievable.
Common ADU types for Buena Park homeowners
Homeowners with an existing two-story home often explore an attached ADU addition to take advantage of Buena Park's height-matching allowance. Homeowners who prefer full separation from the main house often choose a detached ADU instead, accepting the standard 16-foot height limit. A Junior ADU remains the lowest-cost path for converting existing interior space.
Cost factors in Buena Park
Construction costs in Buena Park generally track the same $285–$350 per square foot range as the rest of our Orange County service area — see our full ADU cost guide. A two-story attached addition typically costs more per square foot than a single-story detached unit, due to the added structural and foundation requirements of tying into an existing multi-story home.
Financing your Buena Park ADU
Most homeowners fund construction through a HELOC, cash-out refinance, or dedicated construction loan — see our ADU financing overview for how each works.
Rental income and property value in Buena Park
Buena Park's mix of single-family neighborhoods supports real rental demand for many homeowners, though actual achievable rent depends heavily on your specific neighborhood and unit — we don't have a verified, current rent figure to quote. See our ADU rental income guide and ROI calculator to work through your own numbers.
How our process works
Frequently asked questions
Generally yes, if it's attached to your primary home — Buena Park allows an attached ADU up to 2 stories and 30 feet, or as high as your existing 2-story home if that's lower. A detached ADU is generally capped at 16 feet.
Buena Park adopted Ordinance No. 1736 on March 26, 2024, which currently governs ADUs in the city and aligns local rules with California state ADU law.
Buena Park generally requires a site plan, floor plan, demolition plan where applicable, and elevations demonstrating compliance with the city's development standards.