Plumbing repair · Thornton, Colorado
Plumbing repair in Thornton, CO
Leak, backed-up drain, no hot water, or a frozen line? The largest share of Thornton's homes (26%) was built 2000 to 2009[1]. Request a licensed plumber who works here. Thornton, in Adams County and Weld County — ZIPs 80602, 80229, 80241, 80233, 80260, counts 147,766 residents (2025 estimate)[2].
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Thornton plumbing snapshot: the key figures
- Population (2025 est.)
- 147,766[2]+4.2% since 2020
- County
- Adams / Weld[2]city spans more than one county
- Land area
- 36.7 sq mi[3]
- Decade the most homes date from
- 2000 to 2009[1]26% of housing units
- Homes built before 1980
- 22%[1]the 4th-lowest share of the 15 Denver-area suburbs we cover
- Homes built 1980–1999
- 33%[1]2020–2024
- Homes built 2010 or later
- 19%[1]the 6th-highest share of the 15 Denver-area suburbs we cover
- Flood & flash-flood reports within 10 mi
- 7[4]5 flash floods, 2016–2025; flood-prone homes need working drainage and backflow prevention
- FEMA flood-insurance claims, local ZIPs
- 34[5]5 in the last 10 years; 19 paid
- Homes on utility gas heat
- 70%[1]gas piping work usually needs a permit and a licensed installer
What the local data means for plumbing in Thornton
Thornton counts 147,766 residents (2025 estimate), growing at a middle-of-the-pack 4.2% since 2020[2]. The city spans 36.7 square miles at 4,032 residents per square mile (the 3rd densest) and spans Adams County and Weld County, served by ZIP codes 80602, 80229, 80241, 80233, 80260[3].
With 19% of homes built since 2010 and 22% before 1980[1], Thornton's plumbing runs from brand-new supply lines and fixtures to aging pipe, original valves and water heaters past their rated life.
5 ZIP codes cover Thornton — 80602 (35% of the city's land), 80229 (19% of the city's land), 80241 (18% of the city's land), 80233 (13% of the city's land), 80260 (6% of the city's land)[6].
Nearest of the other suburbs we track: Northglenn (2.2 mi W), Broomfield (6.2 mi W) and Westminster (6.9 mi SW)[3].
22% of Thornton's 52,250 housing units predate 1980 and 19% went up in 2010 or later[1] — the 4th-lowest pre-1980 share of the 15 Denver-area suburbs we cover; nearby, Northglenn (60%), Broomfield (21%), and Westminster (34%) predate 1980. The 33% built in 1980–1999 are at the age where original water heaters and valves get replaced.
The biggest single slice — 26% — was built 2000 to 2009, and the median home dates to 1997[1]. Neighbours from the same era tend to hit the same plumbing problems at the same time.
Water from the sky is plumbing work too: 7 flood or flash-flood reports within 10 miles over 2016–2025[4], and FEMA logged 34 flood-insurance claims across Thornton's ZIPs[5]. Homes that take water need working drainage, sump pumps and backflow prevention.
70% of homes heat with utility gas, and 29% of households rent[1].
Thornton storm calendar
Within 10 miles of Thornton, 2016–2025: 5 flash-flood reports and 2 flood or heavy-rain reports[4]. Peak: 100% in May, July, and August. Busiest year 2022 (2); 5 of 10 years had none. Busiest month August 2022 (2). Latest: flood or heavy-rain report, May 11, 2023, 5.6 mi out.
| Month | Flash flood | Flood & heavy rain | All |
|---|---|---|---|
| May | – | 2 | 2 |
| Jul | 1 | – | 1 |
| Aug | 4 | – | 4 |
Get plumbing help in Thornton
Plumbing repair contractors taking requests around Thornton cover ZIP codes 80602, 80229, 80241, 80233, 80260.
Before you call: before the plumber arrives
The Thornton numbers behind this page
| Measure | Thornton | Median of 15 | Difference |
|---|---|---|---|
| Built before 1980 | 22% | 37% | 15 pts lower |
| Built before 1960 | 4.8% | 7.6% | 3 pts lower |
| Built 2010 or later | 19% | 15% | 4 pts higher |
| Renter-occupied | 29% | 37% | 9 pts lower |
| Flood reports (10 mi) | 7 | 6 | 1 more |
| Utility-gas heat | 70% | 71% | 2 pts lower |
| Median year built | 1997 | 1987 | 10 years newer |
Biggest gaps first. Medians are middle values across the Denver-area suburbs we cover, drawn from the same sources.
| City | Flood reports | NFIP claims |
|---|---|---|
| Thornton | 7 | 34 |
| Northglenn 2.2 mi | 11 | 19 |
| Broomfield 6.2 mi | 6 | 57 |
| Westminster 6.9 mi | 14 | 45 |
| Commerce City 8.2 mi | 2 | 6 |
| Brighton 8.4 mi | 2 | 8 |
| ZIP | Claims | Paid | Busiest year |
|---|---|---|---|
| 80602 | 7 | $20,971 | 2013 (3) |
| 80229 | 13 | $43,179 | 1984 (3) |
| 80241 | 1 | $0 | 2024 (1) |
| 80233 | 4 | $367 | 1990 (1) |
| 80260 | 9 | $17,101 | 2011 (3) |
ZIPs extend past city limits.
| Date | Type | Distance |
|---|---|---|
| May 11, 2023 | Flood | 4.8 mi |
| May 11, 2023 | Flood | 5.6 mi |
| Aug 16, 2022 | Flash Flood | 7.9 mi |
| Aug 7, 2022 | Flash Flood | 5.1 mi |
| Jul 30, 2021 | Flash Flood | 8.0 mi |
| Aug 21, 2019 | Flash Flood | 8.6 mi |
| Aug 30, 2016 | Flash Flood | 7.0 mi |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 1,995 | 3.8% | ±342 |
| 2010 to 2019 | 7,674 | 14.7% | ±578 |
| 2000 to 2009 | 13,665 | 26.2% | ±839 |
| 1990 to 1999 | 10,383 | 19.9% | ±740 |
| 1980 to 1989 | 7,093 | 13.6% | ±673 |
| 1970 to 1979 | 6,926 | 13.3% | ±656 |
| 1960 to 1969 | 1,992 | 3.8% | ±464 |
| 1950 to 1959 | 2,261 | 4.3% | ±293 |
| 1940 to 1949 | 107 | 0.2% | ±101 |
| 1939 or earlier | 154 | 0.3% | ±104 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 52,250 |
| Detached single-family | 32,198 (62%) |
| Occupied homes | 50,566 |
| Owner-occupied | 36,109 (71%) |
| Renter-occupied | 14,457 (29%) |
| Median home value | $517,500 |
ACS 2020–2024 estimates.
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 35,207 | 69.6% | ±1,114 |
| Electricity | 14,191 | 28.1% | ±1,035 |
| Solar energy | 508 | 1.0% | ±227 |
| Bottled or tank gas (propane, butane, etc.) | 463 | 0.9% | ±144 |
| Other fuel | 93 | 0.2% | ±114 |
| No fuel used | 70 | 0.1% | ±70 |
| Fuel oil, kerosene, etc. | 21 | 0.0% | ±31 |
| Wood | 13 | 0.0% | ±21 |
| ZIP (ZCTA) | Share of Thornton's land | Share of the ZIP inside the city |
|---|---|---|
| 80602 | 35% | 41% |
| 80229 | 19% | 55% |
| 80241 | 18% | 97% |
| 80233 | 13% | 50% |
| 80260 | 6% | 44% |
Common Thornton plumbing questions
Are Thornton homes likely to have old galvanized pipes?
Only an inspection can say, but age is the clue: 5% were built before 1960 and 22% before 1980[1].
Which ZIP codes are covered in Thornton?
80602, 80229, 80241, 80233, and 80260[6], in Adams County. Nearby suburbs with their own pages: Northglenn (2.2 mi), Broomfield (6.2 mi), and Westminster (6.9 mi)[3].
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- OpenFEMA NFIP claims
- Census 2020 ZCTA–place file
Data pulled Sep 28, 2026. Full citations and method.