When Major General William Lyon commissioned a 137-acre Georgian compound in the hills of Coto de Caza in 1986, he set out to create more than a private residence. The result was an estate of uncommon scale and purpose: part Southern manor, part working citrus operation, and part executive retreat.
The property sits at the intersection of California landholding, American political history, and institutional-grade real estate.
Now offered for $125 million through Douglas Elliman – Beverly Hills, the Lyon Estate arrives on the market as one of Southern California’s most significant private properties, combining a presidential pedigree with entitlements for a 25-home luxury enclave.
A Georgian Manor Reimagined for the California Landscape
Anchoring the property is a 21,000-square-foot Georgian residence, an architectural outlier in a region dominated by glassy contemporary homes.
Spread across three levels, the house features eight bedrooms and 11 bathrooms, punctuated by coffered ceilings, detailed millwork, and expansive glazing that extends sightlines toward the Santa Ana Mountains and manicured grounds.
The interiors balance classical craftsmanship with estate-scale proportions, reinforcing the home’s role as both a private refuge and a venue designed to host dignitaries.
Presidential Provenance and a Window Into California’s Political History
The estate’s guest logs include President Ronald Reagan and First Lady Nancy Reagan, whose visits reflected Lyon’s standing within national defense circles and Orange County’s political establishment.
The property embodies a particular moment in California’s late-20th-century development where aerospace leaders, landowners, and political influence shaped the region’s growth.
A Master Planner’s Estate, Engineered with Military Precision
Lyon’s military background is evident in the property’s infrastructure, which rivals that of a small campus.
A 23,679-square-foot car museum, built to professional specifications, includes recessed lift turntables, a full auto shop, and storage for up to 70 vehicles. A private helipad supports direct arrivals, while equestrian amenities underscore the estate’s multi-use design.
The agricultural component remains fully operational. More than 4,500 Valencia and Navel trees, planted over 30 years ago, stretch across 41 irrigated acres fed by two onsite lakes, offering both revenue potential and long-term land value.
Three guest houses offer fully equipped accommodations ranging from single-bedroom suites to two-bedroom residences with full kitchens. A dedicated pool house serves the resort-style pool, complete with dry sauna, dual changing rooms, and full bath facilities.
Additional amenities include a brick wine cellar and a championship tennis court built to USTA standards.
A Development-Ready Enclave Within a Legacy Property
Beyond its historical and residential significance, the estate holds strategic investment potential.
The southern 64 acres are entitled for 25 luxury homes within a planned gated community: an increasingly rare opportunity in a county where developable land has become virtually nonexistent.
This dual-positioning, preserving the core compound while unlocking value on the entitled acreage, places the Lyon Estate in a category typically reserved for institutional land assets.
Situated within Coto de Caza, residents gain access to members-only golf, equestrian amenities, and proximity to Laguna Beach and Newport Coast, positioning the property within one of Southern California’s most stable luxury markets.
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