Lago Vista, TX 78645 (Travis County)
About this property
Custom-built for the lake. Priced for the buyer who recognizes value. 21603 Thomas Cove delivers 12-foot ceilings, floor-to-ceiling Lake Travis and Hill Country views, and a covered outdoor kitchen with built-in BBQ, refrigerator, and sink — all on a single level designed for the way people actually live. Four bedrooms, three baths, 2,445 square feet. Built to a finish level that holds up against anything new on the water. 1.74 acres. Flat. Cleared. Utilities in place. R4 multifamily zoning. That last part matters. Add a guest house, in-law suite, barn, or workshop. Put a rental unit on the front of the property and let it offset your costs. Most buyers will never build a thing — but the option is always there, and in real estate, optionality is worth something. The seller also owns the adjacent 1.86-acre tract if you want the full 3.6-acre picture. Rate buydown to 3.99% available through preferred lender. 4 BD | 3 BA | 2,445 SF | 1.74 AC | R4 Zoning | Lake Travis Views | Outdoor Kitchen | Adjacent 1.86 AC Available | Lake Travis & Hill Country Views
Property details
Location
About the Area
21603 Thomas Cv is located in Lago Vista, Texas, in Travis County. Travis County is home to Austin, the capital of Texas and one of the fastest-growing major cities in the United States. Beyond the urban core, Travis County still contains significant ranch and acreage properties in its western reaches, where the Hill Country meets the city and land values reflect both agricultural heritage and proximity to one of America's most dynamic economies.
The Colorado River flows through Travis County, impounded into Lake Travis and Lake Austin, key recreation anchors for the region. The Balcones Escarpment marks the transition from the limestone Hill Country in the west to the Blackland Prairie in the east. Barton Creek and its tributaries carve spring-fed swimming holes and nature preserves within the urban fabric.
Lago Vista had an estimated population of 9,341 as of 2023. The 78645 zip code has a median household income of $108,393, a median home value of $387,200, and a median age of 51.6. The average household size is 2.3 people.
Austin's economy is anchored by the University of Texas, state government, and a massive technology sector that has attracted Apple, Tesla, Oracle, Dell, and hundreds of startups. Travis County acreage properties command premium prices reflecting proximity to the Austin job market, major airports, and world-class amenities.
Demographic data sourced from the U.S. Census Bureau, American Community Survey 5-Year Estimates (2023).
Listing information © 2026 Unlock MLS (ACTRIS). All data provided AS IS. Information is deemed reliable but not guaranteed. Listing courtesy of RE/MAX Suburbia.