Set on over four serene acres in the rolling hills of Fallbrook, this exceptional multi-unit estate offers a rare blend of privacy, versatility, and refined design. Tucked behind two private gates and surrounded by mature landscaping, the 4.08-acre property feels like a secluded retreat while still providing convenient access to nearby amenities. The main residence is a thoughtfully designed two-story home featuring 3 bedrooms and 3.5 bathrooms, including dual primary suitesone on each levelideal for multi-generational living or hosting guests in comfort. The expansive floor plan is anchored by a large designer kitchen equipped for both everyday living and entertaining, with generous counter space, custom cabinetry, and seamless flow into the main living areas. Natural light pours in through oversized windows, while multiple access points lead out to sweeping decks on both levels, creating a true indoor-outdoor lifestyle. Under the home is an unfinished basement that can possibly add around 1000 extra sqft. Step outside to experience the homes standout features: expansive decks that overlook the tranquil grounds, perfect for relaxing or entertaining. The lower deck includes a private plunge pool, offering a refreshing escape with peaceful views of the surrounding landscape. Beyond the main home, the property includes two additional residential units, providing incredible flexibility and income potential. A detached casita offers 2 bedrooms and 1 bathroom, ideal for extended family, guests, or rental opportunities. Additionally, a spacious 2-bedroom, 1-bath apartment sits ab