Tucked into the heart of Spring Branch and directly across from Smithson Valley High School, this secluded 2.31-acre estate offers a rare blend of modern design, Texas charm, and a fully equipped private casita. Set behind an electric gate and surrounded by mature trees, the property is thoughtfully positioned to capture natural light, Hill Country breezes, and peaceful surroundings while maintaining convenient access to nearby amenities. Designed with biophilic principles, the home incorporates expansive windows, natural materials, and warm, earthy tones to create a calm, connected living environment. Inside, stained concrete floors, exposed metal beams, slate accents, and visible ductwork define a refined industrial-modern aesthetic. The kitchen is both functional and striking, featuring quartz countertops, a waterfall island, a professional-grade range, and automatic shades, all opening seamlessly to the main living and dining areas. Custom closet systems throughout add practical organization. The layout offers a private upstairs primary wing with two additional bedrooms, along with a secondary bedroom and full bath on the main level. Outdoor living is designed for both everyday enjoyment and entertaining, with multiple gathering areas including a covered patio with outdoor kitchen and TV, firepit, exterior bathrooms, and enhanced outdoor lighting. The grounds offer mature landscaping, rose bushes, and space for additional gardening, while local wildlife, including deer, is often seen passing through the property. The detached guesthouse lives as a true private residence with two bedrooms, a full bath, and complete living, dining, and kitchen spaces-ideal for extended stays, multi-generational living, or a dedicated work-from-home environment. Additional features include an oversized three-car garage, two-car carport, and a 35' pass-through garage with oversized doors suitable for RV storage or workshop use. Backing to a large ranch, the property offers elevated views and a sense of privacy, with opportunities to enjoy Hill Country sunsets, seasonal storms rolling across the landscape, and nearby community traditions throughout the year.