Buena Park ADU Market Update — August 2026: What's Active, What Just Closed, and What the Numbers Say
Buena Park doesn't generate the same volume of ADU sales as Garden Grove or Anaheim, and that's exactly what makes the data from this month worth studying carefully. When inventory is thin and comps are sparse, individual transactions carry more weight — and the four properties in this month's data set tell four very different stories about how buyers and sellers are actually behaving in this market right now.
Here's a full breakdown of what's active, what went under contract, and what just closed.
Active Listings
5516 Paraguay Dr, Buena Park 90620 — $1,349,999 Brand new to market on July 24th. This is a fully remodeled single-story contemporary on a 6,725 sqft lot with a permitted 2-bedroom, 1-bath detached ADU built in 2025 (618 sqft, separate address, currently rented). The main residence is 4 bedrooms and 2 baths, 2,116 sqft, with luxury vinyl flooring, white shaker kitchen, and updated baths throughout. Major capital improvements include a new roof and 200-amp electrical panel. At $638/sqft for a turnkey SFR with a rented 2025 ADU, this is positioned well for both the house-hacker and the investor buyer. It's too early to read anything into the days on market — it's been live for 11 days as of this writing.
8601 Links Rd, Buena Park 90621 — $2,950,000 Listed June 26th and still active at 39 days. This is a professionally designed Mid-Century Modern single-story on a 13,200 sqft lot overlooking the Los Coyotes Country Club golf course — with a 400 sqft detached ADU (1 bed/1 bath, 2025, separate address, currently unrented) and a fully owned solar system on the main house. The property is exceptional by any measure: Sub-Zero appliances, new pool and spa, wrought iron fencing with unobstructed golf course views. But at $737.50/sqft and $2.95M, the buyer pool narrows significantly. The ADU is not generating income yet, which means a buyer has to underwrite both the purchase price and the rental upside simultaneously. That's a harder underwriting story at this price point — and 39 days of activity without a contract reflects it.
Under Contract
8744 Fillmore, Buena Park 90620 — $1,530,000 Listed April 27th and went under contract August 3rd — just 14 days after going active (it had a previous status change). This is the most interesting data point in this month's report. The property is a rare triple-unit configuration: the main home (3 bed/2 bath, 1,606 sqft, fully remodeled 2023) plus two detached ADUs both built in 2025, each with their own separate address, utilities meters, and private entrances. ADU one is a 3-bedroom/2-bath at 1,200 sqft generating $2,800/month. ADU two is a 2-bedroom/2-bath at 800 sqft generating $2,400/month. The main unit rents for $3,000/month. Total in-place gross rent: $8,200/month. The solar on both ADUs is fully paid off.
At $1,530,000 and $456/sqft, this is the lowest price per square foot of anything active in this data set — but price per sqft is the wrong metric when you're buying three income streams on one lot. The investor math here is straightforward enough that buyers who understand how to underwrite multi-unit properties with ADUs moved quickly when it hit.
Closed
4751 Saint Andrews, Buena Park 90621 — Listed $1,475,000 / Closed $1,420,000 This one took 103 days to close, started life at $1,650,000 in March, and eventually sold for $1,420,000 — $230,000 below original ask — with $38,400 in total concessions ($28,400 buyer broker fee plus $10,000 in closing costs). The main home is a 4-bedroom/3-bath, 2,133 sqft single-story in the Los Coyotes Country Club neighborhood on a large 10,648 sqft lot. The ADU is a Junior ADU — 1 bed/1 bath, 573 sqft, built 2024, attached to the main structure with a separate address and separate utility meters.
The price trajectory here is significant. A $230,000 reduction from original list to close over 103 days, with substantial concessions, tells you two things: the original pricing was optimistic for what the buyer pool would bear, and buyers made clear distinctions between this property and what ultimately sold at Fillmore. How a home with a JADU gets valued at appraisal is a different calculation than a detached ADU — and in a thin comp market like Buena Park, that gap matters more. Buena Park simply doesn't have enough closed ADU sales to give appraisers a deep comparable set, which makes pricing precision critical and overpricing costly.
What the Numbers Are Telling Us
Detached, income-producing ADUs are moving. Attached and unrented are sitting. The pattern across this data set is consistent. The property that went under contract fastest (Fillmore, 14 days) had two detached ADUs, both rented, and a clear income story. The closed sale that took the longest (Saint Andrews, 103 days) had an attached JADU that wasn't generating documented income at the time of sale. The premium-priced golf course listing (Links Rd) has been on for 39 days with an unrented ADU — and is likely to need time to find its buyer. This matches exactly what the Anaheim ADU market data from August 2026 is showing: buyers in North OC price ADU quality — detached vs. attached, rented vs. vacant — directly into their offers.
Buena Park's thin comp inventory creates real pricing risk. This is one of the structurally harder markets to price an ADU property in. Unlike Garden Grove or Anaheim, where there's enough volume to build a clean comparable set, Buena Park has a limited number of ADU-specific closed sales. Under Fannie Mae's appraisal guidelines, appraisers need comparable ADU sales to support income contribution at value — and in a thin market, they often can't find them. That forces appraisers to make adjustments, which introduces variance. The Saint Andrews price compression from $1.65M to $1.42M is partly a story about what happens when a property is overpriced against a thin comp set.
The investor buyer drives the fast transactions here too. The Fillmore deal moved in 14 days because the income case was completely built before the offer went in: three units, in-place leases, separate meters, $8,200/month gross, paid-off solar. A buyer running DSCR loan underwriting on that property doesn't need to estimate anything — the numbers are right there. Compare that to a property where the ADU is vacant or attached and the buyer has to model the income themselves, and you understand why the absorption speed is so different.
Price per square foot is the wrong lens for ADU properties. Fillmore sold for $456/sqft. Paraguay is asking $638/sqft. Saint Andrews closed at $666/sqft. The investor who bought Fillmore didn't buy it because it was cheap per square foot — they bought it because three income streams plus paid solar plus separate utilities justified the $1.53M purchase price. Before buying any ADU property in OC or LA, the right framework is income-first underwriting, not price per square foot.
For Sellers
If you own a property in Buena Park with a permitted ADU and you're considering a sale, the data here is a clear signal: pricing precision matters more in this market than almost anywhere else in North OC. With a thin comp set and a limited number of active buyers, an overpriced listing doesn't just sit — it bleeds. Saint Andrews started at $1.65M and closed at $1.42M after 103 days and nearly $40K in concessions. That's the cost of getting it wrong in a market with no margin for error.
The buyers for ADU properties in Buena Park are here — as Fillmore proved — but they're income-oriented and they know their numbers. Making sure your property is positioned correctly for that buyer — documented ADU income, permit history pulled, meters confirmed — is what separates a 14-day deal from a 103-day drag.
California's HCD ADU framework has made permitted ADUs standard statewide, but Buena Park's older housing stock means a meaningful percentage of the ADUs you'll find here were built before the state's streamlining era. Verifying that your ADU has a current certificate of occupancy and all required permits before you list — not after a buyer asks during due diligence — puts you in a completely different negotiating position.
For Buyers
Active inventory in Buena Park is genuinely thin. Two true active listings serving a market this size means the right property, when it shows up, doesn't wait. The Fillmore deal — 14 days from active to contract — is a reminder that well-positioned income properties in this market don't linger.
The two current active listings represent different buyer profiles. Paraguay Dr is the cleaner entry point: turnkey, rented ADU, recent construction, reasonable price point, new enough to market that negotiation room may be limited. Links Rd is a different conversation — premium estate-level pricing, exceptional property quality, but an ADU that's not currently generating income and a price point that requires a specific buyer. If you're patient and the golf course lifestyle is part of the equation, there may be more room there.
If you're buying a property with an existing ADU, the permit verification and due diligence checklist should happen before your offer, not after you're in escrow. In a market where comps are thin and unpermitted ADUs can affect appraisal and financing significantly, confirming permit status upfront is what protects your position.
Compared to the Garden Grove ADU market — which has stronger comp depth and more transaction volume — Buena Park is a lower-inventory market where individual deals carry more signal. That cuts both ways: when the right property surfaces, move fast. When something is sitting, there's usually a reason worth understanding before you write an offer.
If you want to talk through any of the active listings or get a customized search for ADU properties in Buena Park, reach out directly at (714) 860-2868.
