Westminster ADU Homes for Sale — Prices, Rents & Closed Sales (September 2026)
Westminster is quietly becoming one of the more interesting ADU markets in Orange County. Tucked between Garden Grove, Fountain Valley, and Huntington Beach, the city has a dense inventory of older SFR lots that have proven surprisingly permitting-friendly — and buyers are starting to notice. If you're looking for a property where the ADU does real income work, Westminster deserves a close look right now.
Here's what the market looks like heading into September 2026.
Active Listings
6091 Navajo — $1,888,000
3 homes on 1 lot | Main: 4bd/3ba | ADU: 1bd/1ba | Jr. ADU: Studio/1ba | ~3,000 SF total
This is the compound play. The main house at 6091 Navajo runs four bedrooms and three baths. The detached ADU at 6093 Navajo has its own address, private entrance, and new kitchen with stainless appliances. The Jr. ADU is an attached studio with a private kitchen and entry off the main house.
Everything is fully permitted and the whole property has been recently renovated — new HVAC, new PEX plumbing, new windows, updated electrical, fresh exterior stucco. The permitted detached garage conversion ADU has its own address at 6093 Navajo, which matters for financing and eventual resale.
At $629/SF on a 7,200 SF lot, this is priced for the income story. Three units under one ownership structure with no HOA.
8741 Jennrich Ave — $1,659,999
3 homes on 1 lot | Main: 4bd/5ba | ADU: 3bd/2ba (949 SF) | Jr. ADU: 1bd/1ba (434 SF) | 8,045 SF lot
Brand new 2026 construction on an 8,045 square foot lot in the Little Saigon corridor. The main house was fully remodeled and features 1,285 SF with quartz counters, luxury vinyl plank, recessed lighting, and a new subpanel. The ADU — completed August 2026 — offers 749 SF of living space plus an enclosed patio of 148 SF, its own private entry, and a separate electrical subpanel.
The seller estimates combined rents at approximately $8,200/month: ~$3,800 for the main house, ~$3,300 for the ADU, and ~$1,900 for the JADU. At $622/SF and three separate income streams, the gross rent multiple on this one pencils quickly.
Both the ADU and JADU have separate addresses, street-level entry, and are entirely non-attached to the main residence.
9440 McFadden — $1,399,000
Main: 4bd/2ba (~1,498 SF) | ADU: 2bd/2ba (750 SF) | 6,000 SF lot
The cleanest price point on this list. The main house is a fully updated 4-bedroom with granite counters, stainless appliances, and new LVP flooring throughout. The ADU is a brand-new 2026 detached build — 750 SF, 2 bedrooms, 2 baths — with its own address, separate water and electric meters, and rear alley access via an oversized covered patio.
Solar is paid-off and owned (installed 2026). The ADU is already rented. At $622/SF and with separate utilities already in place, this is as turnkey as it gets at this price.
Active Under Contract
14472 Moran — $2,388,000
Main: 5bd/5ba (~3,200 SF) | ADU: 2bd/2ba (1,000 SF) | 7,370 SF lot | Little Saigon
Brand new 2025 construction on a 7,370 SF lot in the heart of Little Saigon, steps from Phuoc Loc Tho (Asian Garden Mall). The main residence features soaring ceilings, quartz counters, a 6-burner stove, walk-in pantry, and multiple private suites — purpose-built for multigenerational ownership. The ADU is a brand-new detached 2-bedroom with its own separate garage.
Green Star certified, fully paid solar, and separate meters throughout. This went under contract on August 3, 2026 — less than four weeks on market — which tells you something about demand for high-quality new construction in this submarket.
At $567/SF on new construction in Little Saigon, it's a credible comp ceiling for the Westminster ADU market right now.
Closed Sales
13622 Illinois St — Closed $1,550,000 (August 4, 2026)
Main: 4bd/2ba (~1,200 SF) | ADU: 4bd/2ba (1,200 SF) | 7,200 SF lot
This is the benchmark comp for Westminster ADU properties right now. Both units were rented at the time of sale — the main house at $4,000/month, the ADU also at $4,000/month — for a combined $8,000/month in gross rent. The ADU is a 2026 new-build detached structure with its own separate water meter and electric meter.
It sold at full ask ($1,550,000 = list price) with conventional financing and $37,125 in seller concessions toward buyer's closing costs. COE was August 6, 2026.
At $589/SF on 2,629 SF of combined living space, this is the clearest signal in the Westminster market: fully rented, both units occupied, sold at list.
14332/14322 Joyce — Closed $1,300,000 (August 6, 2026)
Main: 3bd/2ba (~1,050 SF) | ADU: 3bd/2ba (~1,200 SF) | Jr. ADU: 1bd/1ba (380 SF) | 7,247 SF lot
Three fully permitted units — all occupied by tenants. The property sold as-is, cash to new loan, at full ask. Zero concessions. The ADU has a separate address at 14322 Joyce and its own electric meter. The Jr. ADU is attached.
At $1,314/SF on a 989 SF per-MLS figure (noting this likely reflects only the main house square footage), this comp reads best as a land-and-income play — the value is in the rent roll, not the price per foot. Close date was August 6, 2026.
What the Numbers Say
Here's how the Westminster ADU market stacks up heading into September:
PropertyStatusPrice$/SFADU Type6091 NavajoActive$1,888,000$629Detached + Jr. ADU8741 JennrichActive$1,659,999$622Detached + Jr. ADU (new)9440 McFaddenActive$1,399,000$622Detached (new)14472 MoranUnder Contract$2,388,000$567Detached (new const.)13622 IllinoisClosed$1,550,000$589Detached (new)14322 JoyceClosed$1,300,000$1,314*Detached + Jr. ADU
*SF reflects main house only per MLS
Price range: $1.3M–$2.39M
Closed sale average: $1,425,000
Active listing average: $1,649,333
$/SF range (active + closed): $567–$629 (excluding Joyce outlier)
The two closed sales both went at full list price with no price reductions. That's not a soft market — that's a market where correctly priced ADU properties are getting bought.
Westminster as an ADU Market
Westminster's appeal comes from a few structural factors. The city sits in the Huntington Beach Union High School District and Westminster Unified — two sought-after districts that keep owner-occupant demand steady. Lot sizes in the 6,000–8,000 SF range are common, and the city allows detached ADUs and JADUs on single-family lots, consistent with California state ADU law.
The Little Saigon submarket adds a layer of cultural and economic density that makes rental demand especially durable. Both closed sales involved tenant-occupied units — rents held at $3,800–$4,000/month per unit — which is competitive with neighboring Garden Grove and Anaheim.
Where Westminster is thinner than markets like Costa Mesa or Long Beach: fewer active comps at any given time, which makes pricing harder and means buyers need to move quickly when a well-structured deal appears. If you're evaluating Westminster against other OC markets, the Long Beach ADU Homes for Sale — Prices, Rents & Closed Sales roundup gives you a useful contrast for comp depth and price-per-foot ranges.
One thing buyers in this market should confirm before submitting an offer: permit status on every unit. Westminster's ADU inventory includes a mix of newly built structures and older conversions, and not every unit listed as an "ADU" carries complete permits. If you encounter an unpermitted unit on a property you're evaluating, AB 2533 gives Orange County buyers a legalization path worth understanding before you decide how to price the risk.
Thinking About Buying or Selling in Westminster?
Whether you're evaluating a Westminster ADU property for purchase or getting ready to list, the comp set above is your starting point. Both closed sales moved at full ask in a combined 33 days — this market rewards preparation.
If you're a seller, the ADU seller's guide covers how to position a multi-unit property for maximum buyer pool and proper MLS exposure. If you want to run the numbers on a specific property — cash flow, GRM, break-even rent — I'm happy to walk through it.
