587 Gateway Lane, San Marcos, CA 92078

Attached Next Gen Suite. Extra-Large Upstairs Bonus Room & Flex Space. Completely Upgraded with Designer Interiors. Fully Owned Solar. Resort-Inspired Backyard. Gated Community. Cul-De-Sac. Discover elevated living and exceptional versatility in this beautifully appointed 5-bedroom, 4.5-bathroom, approximately 3,450-square-foot residence in the coveted gated community of Parkside at Mission Circle in San Marcos. This highly sought-after Plan 3 home pairs sophisticated coastal Mediterranean design with thoughtful custom upgrades, extraordinary flexibility, and a seamless indoor-outdoor lifestyle. From the moment you enter, the home makes a striking impression with its warm, refined aesthetic and attention to detail. Provenza LVP flooring, designer lighting and hardware, elegant Roman shades, custom finishes, layered textures, and distinctive architectural details create a cohesive, elevated feel throughout. At the heart of the home, the showstopping kitchen combines style and functionality with quartz countertops, a hand-selected stone backsplash, custom quartz shelving, a striking designer stove surround, decorative ceiling beams, and a spacious walk-in pantry. The kitchen opens effortlessly to the main living area, where a custom electric fireplace and mantel create a welcoming focal point for everyday living and entertaining. One of the home's most exceptional features is the private attached Next Gen suite, offering a level of flexibility rarely found in a home of this size and style. Complete with its own entrance, living area, bedroom, full bathroom, separate AC, kitchenette with sink, refrigerator and microwave, and separate laundry hookups, the suite can comfortably accommodate multigenerational living, extended-stay guests, a private office, older children, or a potential rental opportunity. Located less than two miles from Cal State San Marcos and conveniently close to Palomar Medical Center and Kaiser Permanente San Marcos Medical Center, the suite offers additional appeal for multigenerational living, medical professionals, students, and potential rental use. Upstairs, the serene primary retreat features two oversized custom walk-in closets and a spa-inspired bathroom with a freestanding soaking tub, separate shower, custom molding, upgraded mirrors and fixtures, and distinctive Roman clay accent wall. An extra-large upstairs bonus room creates an impressive secondary living destination with endless possibilities for a media room, game room, home theater, second family room, playroom, gym, creative studio, or spacious home office. The generous scale allows this space to function as an entirely separate gathering area, while the home's dedicated upstairs laundry room adds everyday convenience. Custom under-stair storage adds practical functionality without compromising the home's polished aesthetic. Large glass doors extend the living experience outdoors to a beautifully curated, resort-inspired backyard featuring a covered California room with roll-up shades, mature olive trees, thoughtful landscaping, and exterior lighting—creating an inviting setting for morning coffee, relaxed evenings, and entertaining. Additional highlights include fully paid solar with a partial-home backup battery under NEM 2.0, an electric vehicle charger connection in the garage, designer faucets and cabinet hardware, and a second laundry area downstairs. Beyond the residence, enjoy the welcoming lifestyle of this gated cul-de-sac community within the highly rated San Marcos Unified School District. Neighborhood traditions including Food Truck Fridays, holiday bike parades, Halloween festivities, and other gatherings foster a genuine sense of community.