Rarely does a property offer this level of flexibility, privacy, and usable land in the heart of Round Rock. Situated on just over one acre across two separate lots, this extensively updated property features a renovated main home plus a fully permitted guest house with its own address, separate utilities, private driveway, and climate-controlled garage - ideal for multigenerational living, guests, or a home-based business. The 2,382-square-foot main home features smooth ceilings, luxury vinyl plank and tile flooring, fresh interior and exterior paint, replacement windows and doors, updated lighting, and modern finishes throughout. The spacious living room with brick fireplace flows into the dining area and updated kitchen with granite countertops, abundant cabinetry, double oven, and newer stainless steel appliances. A dedicated office adds work-from-home flexibility, while the oversized primary suite includes a remodeled walk-in shower, new dual-sink vanity, and generous closet space. Outside, mature oak trees shade an expansive backyard and covered patio with misting system and solar lighting. The approximately 504-square-foot guest house sits on its own separately addressed lot and features one bedroom, 1.5 baths, full kitchen, vaulted wood ceilings, covered porch, and fenced yard. A four-car driveway, independent utilities, RV hookup with water and sewer dump, and 656-square-foot climate-controlled garage/workshop add exceptional versatility. Additional improvements include updated HVAC with UV air purification, water softener, whole-home security system with cameras, newer flooring, paint, lighting, and appliances. Minutes from HEB, Dell, Kalahari Resort, Old Settlers Park, Round Rock Premium Outlets, and I-35. Property lies within Travis AND Williamson Counties. Tax amounts in listing are combined for both - can attend either Pflugerville ISD or Round Rock ISD schools!