Luxury Meets Country Living in San Marcos! Welcome to 140 Gustav Ln, a stunning custom-built home offering the perfect blend of upscale finishes, modern technology, and peaceful Texas living. Situated on a spacious 1-acre lot, this beautifully appointed 5-bedroom, 3-bathroom home also features a dedicated office, providing flexibility for it all! Step inside to discover an impressive open-concept layout filled with natural light, soaring 10-foot ceilings, 8-foot doors, designer finishes, and a striking floor-to-ceiling wood-burning fireplace anchoring the expansive living room. The chef-inspired kitchen is the heart of the home, showcasing Level 6 Calacatta quartz countertops, custom soft-close cabinetry, premium stainless steel appliances, smart double ovens, induction cooktop, pot filler, oversized pantry, large center island, and a custom vent hood with designer backsplash. The private primary suite offers a luxurious retreat with tray ceilings and a spa-inspired bath featuring dual vanities, an oversized walk-in shower with dual shower heads, rain shower, bench seating, and a spacious custom walk-in closet. Built with comfort and efficiency in mind, this Energy Star-certified smart home includes spray foam insulation, an 18 SEER two-stage HVAC system, smart home technology package, built-in speakers, security system, pre-wired camera system, water softener, sprinkler system, and backup generator connection. Enjoy seamless indoor-outdoor living with oversized picture windows overlooking the backyard and a covered patio featuring vaulted wood ceilings, built-in speaker zones, and space pre-plumbed for an outdoor kitchen. The fully fenced property offers a 3-car side-entry garage, detached shop/garage with 220V service, seamless gutters, and extensive irrigation. A rare combination of luxury finishes, advanced technology, energy efficiency, and wide-open space, this exceptional property offers what you've been searching for while located near San Marcos!