Plumbing repair · Round Rock, Texas
Plumbing repair in Round Rock, TX
Leak, backed-up drain, no hot water, or a frozen line? The largest share of Round Rock's homes (27%) was built 2000 to 2009[1]. Request a licensed plumber who works here. Round Rock, in Williamson County and Travis County — ZIPs 78665, 78664, 78681, counts 141,282 residents (2025 estimate)[2].
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Round Rock plumbing snapshot: the key figures
- Population (2025 est.)
- 141,282[2]+18.2% since 2020
- County
- Williamson / Travis[2]city spans more than one county
- Land area
- 38.6 sq mi[3]
- Decade the most homes date from
- 2000 to 2009[1]27% of housing units
- Homes built before 1980
- 11%[1]the 4th-highest share of the 15 Austin-area suburbs we cover
- Homes built 1980–1999
- 34%[1]2020–2024
- Homes built 2010 or later
- 28%[1]the lowest share of the 15 Austin-area suburbs we cover
- Winter-storm & freeze days, williamson zone
- 23[4]2016–2025
- Flood & flash-flood reports within 10 mi
- 20[4]19 flash floods, 2016–2025; flood-prone homes need working drainage and backflow prevention
- FEMA flood-insurance claims, local ZIPs
- 310[5]11 in the last 10 years; 242 paid
Reading the Round Rock data for plumbing
Round Rock counts 141,282 residents (2025 estimate), growing at a middle-of-the-pack 18.2% since 2020[2]. It covers 38.6 square miles (3,659 residents per square mile, the 1st densest), spans Williamson County and Travis County, in ZIP codes 78665, 78664, 78681[3].
With 28% of homes built since 2010 and 11% before 1980[1], Round Rock's plumbing runs from brand-new supply lines and fixtures to aging pipe, original valves and water heaters past their rated life.
Mail to Round Rock goes through 3 ZIP codes — 78665 (39% of the city's land), 78664 (32% of the city's land), 78681 (28% of the city's land)[7].
The closest tracked neighbours are Pflugerville (6.5 mi SE), Hutto (7.2 mi E) and Cedar Park (9.3 mi W)[3].
11% of Round Rock's 51,143 housing units predate 1980 and 28% went up in 2010 or later[1] — the 4th-highest pre-1980 share of the 15 Austin-area suburbs we cover; nearby, Pflugerville (4%), Hutto (3%), and Cedar Park (6%) predate 1980. Houses that old can still have galvanized supply pipe or cast-iron drains — especially the 2% built before 1960.
The biggest single slice — 27% — was built 2000 to 2009, and the median home dates to 2002[1]. Neighbours from the same era tend to hit the same plumbing problems at the same time.
Freeze risk: the williamson forecast zone logged 23 winter-storm, ice or hard-freeze days in 2016–2025, including February 2021; the latest was Feb 22, 2025[4].
Water from the sky is plumbing work too: 20 flood or flash-flood reports within 10 miles over 2016–2025[4], and FEMA logged 310 flood-insurance claims across Round Rock's ZIPs[5]. Homes that take water need working drainage, sump pumps and backflow prevention.
50% of homes heat with utility gas, and 44% of households rent[1]. Tenants: report plumbing failures to the landlord in writing.
Out of the 15 suburbs on this site, Round Rock has the lowest share of homes built since 2010 (28%)[1] and the 2nd-oldest housing (by median year built) (2002)[1].
Finding plumbing help around Round Rock
Plumbing repair contractors taking requests around Round Rock cover ZIP codes 78665, 78664, 78681.
Before you call: before the plumber arrives
Round Rock by the numbers
| Measure | Round Rock | Median of 15 | Difference |
|---|---|---|---|
| Built before 1980 | 11% | 4% | 6 pts higher |
| Renter-occupied | 44% | 31% | 14 pts higher |
| Built 2010 or later | 28% | 50% | 22 pts lower |
| Utility-gas heat | 50% | 37% | 13 pts higher |
| Flood reports (10 mi) | 20 | 17 | 3 more |
| Median year built | 2002 | 2010 | 8 years older |
| Built before 1960 | 1.5% | 1.5% | same as median |
Biggest gaps first. Medians are middle values across the Austin-area suburbs we cover, drawn from the same sources.
| City | Flood reports | NFIP claims | Freeze days |
|---|---|---|---|
| Round Rock | 20 | 310 | 23 |
| Pflugerville 6.5 mi | 20 | 49 | 22 |
| Hutto 7.2 mi | 16 | 17 | 23 |
| Cedar Park 9.3 mi | 27 | 61 | 23 |
| Georgetown 10.0 mi | 10 | 128 | 23 |
| Leander 12.3 mi | 20 | 104 | 23 |
| ZIP | Claims | Paid | Busiest year |
|---|---|---|---|
| 78665 | 14 | $189,444 | 2015 (5) |
| 78664 | 138 | $3,687,294 | 2015 (24) |
| 78681 | 158 | $4,541,578 | 2010 (61) |
ZIPs extend past city limits.
| Date | Type | Distance |
|---|---|---|
| May 6, 2025 | Flash Flood | 7.0 mi |
| May 1, 2024 | Flash Flood | 6.7 mi |
| Apr 20, 2023 | Flash Flood | 8.7 mi |
| Apr 20, 2023 | Flash Flood | 9.0 mi |
| Aug 27, 2022 | Flash Flood | 7.0 mi |
| Jun 23, 2020 | Flood | 2.3 mi |
| Apr 6, 2019 | Flash Flood | 8.0 mi |
| Apr 6, 2019 | Flash Flood | 7.4 mi |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 2,832 | 5.5% | ±546 |
| 2010 to 2019 | 11,556 | 22.6% | ±807 |
| 2000 to 2009 | 13,813 | 27.0% | ±918 |
| 1990 to 1999 | 10,415 | 20.4% | ±973 |
| 1980 to 1989 | 7,141 | 14.0% | ±961 |
| 1970 to 1979 | 3,916 | 7.7% | ±459 |
| 1960 to 1969 | 691 | 1.4% | ±225 |
| 1950 to 1959 | 424 | 0.8% | ±199 |
| 1940 to 1949 | 248 | 0.5% | ±139 |
| 1939 or earlier | 107 | 0.2% | ±61 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 51,143 |
| Detached single-family | 32,923 (64%) |
| Occupied homes | 48,647 |
| Owner-occupied | 27,016 (56%) |
| Renter-occupied | 21,631 (44%) |
| Median home value | $418,600 |
ACS 2020–2024 estimates.
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 24,423 | 50.2% | ±1,236 |
| Electricity | 22,992 | 47.3% | ±1,016 |
| Bottled or tank gas (propane, butane, etc.) | 547 | 1.1% | ±231 |
| No fuel used | 354 | 0.7% | ±227 |
| Solar energy | 202 | 0.4% | ±110 |
| Fuel oil, kerosene, etc. | 74 | 0.2% | ±79 |
| Wood | 40 | 0.1% | ±59 |
| Other fuel | 15 | 0.0% | ±25 |
| ZIP (ZCTA) | Share of Round Rock's land | Share of the ZIP inside the city |
|---|---|---|
| 78665 | 39% | 61% |
| 78664 | 32% | 72% |
| 78681 | 28% | 45% |
Dated heat and freeze records for the WILLIAMSON forecast zone: see the county list.
Round Rock plumbing questions
Are Round Rock homes likely to have old galvanized pipes?
Only an inspection can say, but age is the clue: 2% were built before 1960 and 11% before 1980[1].
How often do pipes freeze in Round Rock?
The record for Round Rock's forecast zone shows 23 winter-storm or freeze days over 2016–2025, in 9 different years[4].
Which ZIP codes are covered in Round Rock?
78665, 78664, and 78681[7], in Williamson County. Nearby suburbs with their own pages: Pflugerville (6.5 mi), Hutto (7.2 mi), and Cedar Park (9.3 mi)[3].
I rent in Round Rock. Who arranges the repair?
44% of occupied Round Rock homes are rented[1], the 4th-highest share of the 15 Austin-area suburbs we cover. Tell your landlord or property manager in writing first; your lease says who arranges repairs.
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- OpenFEMA NFIP claims
- Texas State Board of Plumbing Examiners (link unverified)
- Census 2020 ZCTA–place file
Data pulled Sep 28, 2026. Full citations and method.