AC & heating repair · Lago Vista, Texas
AC repair and HVAC service in Lago Vista, TX
AC quit, heat pump struggling, or a system near the end of its life? In Lago Vista, 79% of homes heat with electricity[1] and half were built before 2004. Request service from HVAC contractors working here. Lago Vista, in Travis County — ZIP 78645, counts 10,498 residents (2025 estimate)[2].
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Lago Vista at a glance for HVAC
- Population (2025 est.)
- 10,498[2]+18.2% since 2020
- County
- Travis[2]
- Land area
- 14.4 sq mi[3]
- Homes heated with electricity
- 79%[1]the highest share of the 15 Austin-area suburbs we cover
- Homes heated with utility gas
- 7%[1]plus 13% propane/LP
- Heat & excessive-heat days, travis zone
- 8[4]2016–2025
- Winter-storm & freeze days, travis zone
- 22[4]2016–2025; heating demand and freeze-related furnace failures
- Lightning-damage reports within 10 mi
- 3[4]2016–2025; power surges damage HVAC control boards
- Damaging-wind reports within 10 mi
- 22[4]2016–2025; wind-blown debris damages outdoor condenser units
- Homes built before 2000
- 41%[1]of 4,926 housing units
- Median year built
- 2004[1]the 3rd-oldest of the 15 Austin-area suburbs we cover
What Lago Vista's numbers say about HVAC
Lago Vista counts 10,498 residents (2025 estimate), growing at a middle-of-the-pack 18.2% since 2020[2]. The city spans 14.4 square miles at 727 residents per square mile (the 15th densest) and sits entirely in Travis County, served by ZIP code 78645[3].
With 34% of homes built in 2010 or later[1], a good share of Lago Vista's equipment may still be under builder or manufacturer warranty; the 41% built before 2000 is where replacement jobs cluster.
The entire city sits in ZIP code 78645[5].
The closest tracked neighbours are Lakeway (6.8 mi S), Bee Cave (10.2 mi S) and Cedar Park (11.0 mi E)[3].
79% of occupied Lago Vista homes heat with electricity, 7% with utility gas and 13% with propane[1] — the highest electric share of the 15 Austin-area suburbs we cover; nearby, Lakeway (60%), Bee Cave (68%), and Cedar Park (43%) heat electrically. Electric heat usually means one outdoor unit doing both jobs.
Travis County forecast zone, 2016–2025: 8 heat or excessive-heat days (latest Aug 20, 2024) and 22 winter-storm or hard-freeze days[4]. Nearby: Lakeway (8), Bee Cave (8), and Cedar Park (5).
Storm exposure for HVAC hardware: 3 lightning-damage reports within 10 miles; 22 damaging-wind reports within 10 miles in 2016–2025[4]. Most recent: Jun 3, 2023, 6.5 miles from the city center.
41% of Lago Vista's 4,926 housing units were built before 2000 and 34% since 2010[1] (pre-2000 share nearby: Lakeway (41%), Bee Cave (13%), and Cedar Park (34%)). Check builder-installed equipment for a registered warranty.
Out of the 15 suburbs on this site, Lago Vista has the highest electric-heat share (79%)[1], the lowest gas-heat share (7%)[1], and the 3rd-oldest housing (by median year built) (2004, tied with Pflugerville and Lakeway)[1].
How air moves through a central system
Return, filter, air handler, supply ducts: a clogged filter slows the whole loop.
HVAC help in Lago Vista: what to do next
Your request reaches AC & heating repair contractors who serve Lago Vista (ZIP code 78645).
Before you pick up the phone: repair or replace? what a good hvac visit covers
The Lago Vista numbers behind this page
| Measure | Lago Vista | Median of 15 | Difference |
|---|---|---|---|
| Propane / LP heat | 13.3% | 2.2% | 11 pts higher |
| Built before 2000 | 41% | 17% | 25 pts higher |
| Utility-gas heat | 7% | 37% | 29 pts lower |
| Electric heat | 79% | 60% | 19 pts higher |
| Built 2010 or later | 34% | 50% | 15 pts lower |
| Damaging-wind reports (10 mi) | 22 | 24 | 2 fewer |
| Median year built | 2004 | 2010 | 6 years older |
Largest differences first. Medians are the middle value across the covered Austin-area suburbs, from the same sources.
| City | Heat days | Freeze days | Lightning reports | Damaging-wind reports |
|---|---|---|---|---|
| Lago Vista | 8 | 22 | 3 | 22 |
| Lakeway 6.8 mi | 8 | 22 | 1 | 20 |
| Bee Cave 10.2 mi | 8 | 22 | 2 | 26 |
| Cedar Park 11.0 mi | 5 | 23 | 7 | 45 |
| Leander 11.4 mi | 5 | 23 | 6 | 25 |
| Liberty Hill 15.4 mi | 5 | 23 | 3 | 12 |
| Date | Wind | Distance |
|---|---|---|
| Jun 3, 2023 | 70 mph (est.) | 6.5 mi |
| May 5, 2023 | 64 mph | 2.3 mi |
| Oct 24, 2022 | 63 mph | 6.1 mi |
| May 28, 2021 | 67 mph | 7.8 mi |
| May 28, 2021 | 58 mph | 5.3 mi |
| May 28, 2021 | 64 mph | 3.4 mi |
| Date | Distance |
|---|---|
| Jul 24, 2017 | 8.3 mi |
| Jul 24, 2017 | 9.0 mi |
| Sep 25, 2016 | 9.3 mi |
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Electricity | 3,482 | 78.8% | ±271 |
| Bottled or tank gas (propane, butane, etc.) | 587 | 13.3% | ±166 |
| Utility gas | 322 | 7.3% | ±145 |
| Wood | 29 | 0.7% | ±46 |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 533 | 10.8% | ±234 |
| 2010 to 2019 | 1,160 | 23.5% | ±270 |
| 2000 to 2009 | 1,208 | 24.5% | ±420 |
| 1990 to 1999 | 628 | 12.7% | ±208 |
| 1980 to 1989 | 695 | 14.1% | ±265 |
| 1970 to 1979 | 583 | 11.8% | ±228 |
| 1960 to 1969 | 18 | 0.4% | ±27 |
| 1950 to 1959 | 42 | 0.9% | ±47 |
| 1940 to 1949 | 43 | 0.9% | ±54 |
| 1939 or earlier | 16 | 0.3% | ±26 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 4,926 |
| Detached single-family | 4,161 (84%) |
| Occupied homes | 4,420 |
| Owner-occupied | 3,962 (90%) |
| Renter-occupied | 458 (10%) |
| Median home value | $420,000 |
ACS 2020–2024 estimates.
| ZIP (ZCTA) | Share of Lago Vista's land | Share of the ZIP inside the city |
|---|---|---|
| 78645 | 100% | 44% |
Dated heat and freeze records for the TRAVIS forecast zone: see the county list.
Common Lago Vista HVAC questions
Are heat pumps common in Lago Vista?
79% of Lago Vista homes heat with electricity[1], which means a heat pump or electric resistance heat.
How old are Lago Vista's homes — and their HVAC systems?
The median home dates to 2004, and 34% were built in 2010 or later[1]. Your own system may have been replaced since — the outdoor unit's data plate shows when it was made.
Which Lago Vista ZIP codes are covered?
78645[5], Travis County. Nearby pages: Lakeway (6.8 mi), Bee Cave (10.2 mi), and Cedar Park (11.0 mi)[3].
A lot of Lago Vista homes predate 1980 — what does that mean for HVAC equipment work?
14% of Lago Vista's housing units were built before 1980, 2.1% before 1960[1] — the 2nd-highest share of the 15 Austin-area suburbs we cover. The ductwork in an older house is often original even when the equipment is not — ask for a duct leakage check with any replacement quote.
My Lago Vista home runs on propane — does that matter?
13.3% of occupied Lago Vista homes heat mainly with bottled, tank or LP gas[1], at least twice the median share of the suburbs we cover (2.2%). Homes on propane need a contractor who works on LP appliances — mention it when you request service.
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- Census 2020 ZCTA–place file
Data pulled Sep 28, 2026. Full citations and method.