Fullerton ADU Properties — Market Update (March 2026)
Overview
Four out of seven ADU properties already sold — that is strong absorption. The Fullerton market is showing healthy investor demand for multi-unit properties, with three additional listings still on the market.
This market analysis covers seven ADU properties currently tracked in Fullerton, representing a diverse range of price points and investor profiles across the market.
Sold Properties
128 S Citrus Avenue — $1,400,000 (Standout Investment Template)
This newly constructed 2025 home features seven bedrooms, four bathrooms, and was sold tenant-occupied with independent entrances — the investor's dream scenario. The property exemplifies the modern ADU investment model, with immediate rental income generating $575 per square foot.
This sale demonstrates strong market confidence in the ability to execute tenant-in-place strategies in Orange County — a critical advantage for investors seeking immediate cash flow.
Mid-Range Duplex Sales
Two duplex sales dominated the mid-range segment:
124 N Princeton Avenue — $1,100,000 (the list's lowest price point)
725 San Ramon — $1,449,000
Both represent turnkey cash-flow opportunities requiring no construction or significant repositioning. These sales underscore that Fullerton's duplex inventory appeals to buy-and-hold investors seeking immediate rental income without the development timeline.
Luxury Segment
660 Green Acre ($2.625 million on 20,700 square feet) illustrates the upper end of the Fullerton market. This property targets primary residence end-users rather than income-focused investors, signaling that Fullerton attracts diverse buyer profiles across all price tiers.
Active Listings
Three properties remain available in today's market:
1419 N Richman Knoll — $3.5 million asking price on 1.15 acres (the premium luxury segment)
Two modestly-priced options around $1.35 million (serving the entry-to-mid investor tier)
These active listings show continued pipeline strength, with new demand absorbing inventory quickly after close.
Market Insights: Why Fullerton Competes
Fullerton offers a lower entry point compared to coastal Orange County cities, with more duplex inventory and strong rental demand. The city's ADU regulatory environment continues to support development, positioning it as one of Orange County's most accessible markets for new investors.
The combination of moderate pricing, strong tenant demand, and a pipeline of qualified buyers makes Fullerton a strategic focus market for ADU investors in 2026.
