Welcome to 12852 Foster Road, nestled in the highly sought-after community of Rossmoor, Orange County-where pride of ownership meets exceptional comfort and design. This beautifully upgraded single-story home offers approximately 2,000 square feet of total living space, including a 1,645 sqft main home and a 355 sqft detached pool casita. Situated on an 8,064 sqft lot, it features full RV hookups, a 45-foot gated RV parking space, and a sweeping driveway leading to a finished two-car garage with direct access-altogether a rare find in Rossmoor. Inside, high vaulted ceilings, recessed lighting, and designer tile flooring flow seamlessly throughout. The living room centers around a granite gas-and-wood-burning fireplace with mantle, surround sound, and dual-pane windows, creating a warm and inviting gathering space. The chef's kitchen has been completely remodeled with solid wood cabinetry (with custom pullouts), granite countertops, stainless steel KitchenAid appliances, and a sunlit garden window. The adjacent formal dining area opens through a custom beveled-glass sliding door to the private backyard oasis. The primary suite offers a walk-in closet and a luxurious en-suite bath featuring granite counters, a marble shower, and elegant designer finishes. Secondary bedrooms include mirrored closets and ceiling fans. The detached casita provides flexibility as a home office, guest suite, or fourth bedroom, complete with built-in cabinetry and a view of the resort-style backyard. Step outside to enjoy your own private retreat, showcasing a Pebble-Tec pool and spa, built-in BBQ with seating area, outdoor bathroom, mature palms, custom lighting, and abundant storage. Additional upgrades include a newer roof, tankless water heater, re-lined sewer line, and updated HVAC for year-round comfort for both main house and annex. The finished two-car garage offers extensive cabinetry, a stainless utility sink, and washer/dryer hookups. Ideally located near award-winning Los Alamitos schools, beautiful parks, and convenient shopping, this home perfectly blends functionality, sophistication, and the best of Southern California indoor-outdoor living.