Buena Park ADU Homes for Sale — Prices, Rents & Closed Sales (September 2026)
Buena Park sits at one of the more interesting intersections in North Orange County: affordable enough that ADU investment math still pencils out, close enough to major employment corridors that rents hold up, and underbuilt enough on the ADU side that inventory stays thin. As of September 2026, there are two active ADU properties on the market and one that recently went under contract — and the data tells a clear story about where this market is heading.
What's Active Right Now
5516 Paraguay Dr, Buena Park 90620 — $1,299,999
This 6-bedroom, 3-bath single-story sits on a 6,725 sq. ft. lot in the 90620 zip code with a fully permitted, detached 2-bedroom/1-bath ADU built in 2025. The ADU is 618 sq. ft., has its own separate address and entrance, and is currently occupied and generating rental income from day one. The main house offers 4 bedrooms and 2 remodeled baths with luxury vinyl flooring, a white shaker kitchen, and a newer roof and 200-amp panel.
The property came to market at $1,349,999 and was reduced to $1,299,999 — 37 days in as of this writing. The seller is also offering a 2-1 rate buydown credit, which for a buyer using conventional financing could meaningfully reduce carrying costs in year one.
8601 Links Rd, Buena Park 90621 — $2,950,000
This is the outlier in the Buena Park ADU inventory — a professionally designed, single-level Mid-Century Modern home on 13,200 sq. ft. overlooking the Los Coyotes Country Club Golf Course. The main residence is approximately 4,000 sq. ft. with 5 bedrooms, 3.5 baths, a chef's kitchen, a Sub-Zero refrigerator, and a private pool and spa. The ADU is a newly built 400 sq. ft. 1-bedroom with a private entrance and in-unit washer/dryer — positioned more toward guest house or extended-family use than pure income production. Owned solar rounds out the package.
At $2.95M it's a different buyer profile than Paraguay, but it's worth knowing it exists: luxury-tier ADU inventory is extremely thin in this zip code.
Recently Under Contract
8744 Fillmore, Buena Park 90620 — $1,530,000 (Under Contract as of 8/3/2026)
This is the most compelling data point in the current Buena Park ADU market. The Fillmore property is a three-unit setup on a 10,980 sq. ft. lot — a remodeled main house (3bd/2ba, 1,606 sq. ft.) plus two newly built ADUs, each with their own address and separate utility meters. If you've wondered whether California actually allows two detached ADUs on a single-family lot, this property is the real-world example.
ADU one is 800 sq. ft. with 2 bedrooms and 2 baths, renting at $2,400/month. ADU two is 1,200 sq. ft. with 3 bedrooms and 2 baths, renting at $2,800/month. The main house rents for $3,000/month. Total gross monthly income: $8,200.
At a $1,530,000 list price and $8,200/month in gross rent, this property was generating real numbers — and a buyer put it under contract after 44 days on market. That's meaningful signal for the Buena Park multi-ADU segment. (Note: both ADUs were listed as solar-equipped, paid off, but the listing agent advises buyers to independently verify all permits with the City of Buena Park. If you're ever buying a property where ADU permit status is unclear, it's worth understanding your options under AB 2533 before you remove contingencies.)
ADU Rent Snapshot
Based on the active and under-contract listings, here's what ADU rents look like in Buena Park right now:
2-bedroom ADU (618–800 sq. ft.): $2,400/month
3-bedroom ADU (1,200 sq. ft.): $2,800/month
Main house rents (3bd/2ba, ~1,600 sq. ft.): $3,000/month
Buena Park rents are solid but trail behind Garden Grove and Anaheim, where 2-bedroom ADUs routinely hit $2,600–$2,800/month. That rent differential is part of why Buena Park ADU prices remain more accessible for buyers — the yield math is slightly tighter, but the entry point is lower. Cypress and Fullerton, by contrast, have even thinner comp data than Buena Park, so Buena Park is actually one of the better-documented thin markets in North OC right now.
What This Means If You're Buying
Buena Park is a thin comp market for ADU properties — three listings at any given time is about as active as it gets. That scarcity cuts both ways: fewer options, but less competition when you do move on a property.
If you're exploring this kind of investment more broadly, the complete buyer's guide to finding ADU-potential multi-unit lots in Orange County covers what to look for before you tour — lot size minimums, zoning flags, and the utility meter question that trips up a lot of first-time ADU buyers.
For buyers financing a purchase, it's also worth knowing that Fannie Mae's ADU income guidelines allow lenders to count rental income from an ADU in the qualifying calculation — which can meaningfully change how much property you can buy when one unit is already cash-flowing.
What This Means If You're Selling
If you own a Buena Park property with a permitted ADU, you're operating in a market with very little competition. The two active listings have been sitting 37–69 days respectively, which tells you that pricing strategy matters — but the Fillmore under-contract at 44 days shows that the right package (income-producing, multi-unit, fully permitted) does find buyers. If you're thinking about timing your exit, the complete seller's guide for ADU homes walks through how to position a property like this, what documentation buyers and lenders will ask for, and why the ADU's permit status can make or break your pool of qualified offers.
Browsing for ADU Properties?
Click Link Here to View Homes Right now!
Data sourced from CRMLS as of September 3, 2026. All figures should be independently verified. Dylan Serna is a licensed California real estate agent (DRE #02217359) specializing in ADU properties across Orange County and LA County.
