Plumbing repair · St. Peters, Missouri
Plumbing repair in St. Peters, MO
Leak, backed-up drain, no hot water, or a frozen line? The largest share of St. Peters's homes (31%) was built 1980 to 1989[1]. Request a licensed plumber who works here. St. Peters, in St. Charles County — ZIPs 63376, 63304, counts 61,479 residents (2025 estimate)[2].
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St. Peters plumbing snapshot: the key figures
- Population (2025 est.)
- 61,479[2]+6.5% since 2020
- County
- St. Charles[2]
- Land area
- 22.5 sq mi[3]
- Decade the most homes date from
- 1980 to 1989[1]31% of housing units
- Homes built before 1980
- 25%[1]the 5th-lowest share of the 15 St. Louis–area suburbs we cover
- Homes built 1980–1999
- 50%[1]2020–2024
- Homes built 2010 or later
- 12%[1]the 5th-highest share of the 15 St. Louis–area suburbs we cover
- Winter-storm & freeze days, st. charles zone
- 12[4]2016–2025
- Flood & flash-flood reports within 10 mi
- 8[4]8 flash floods, 2016–2025; flood-prone homes need working drainage and backflow prevention
- FEMA flood-insurance claims, local ZIPs
- 534[5]92 in the last 10 years; 446 paid
- Homes on utility gas heat
- 69%[1]gas piping work usually needs a permit and a licensed installer
What the local data means for plumbing in St. Peters
St. Peters is one of the fastest-growing St. Louis–metro suburbs tracked here: 61,479 people (2025 estimate), up 6.5% since 2020[2]. The city spans 22.5 square miles at 2,728 residents per square mile (the 8th densest) and sits entirely in St. Charles County, served by ZIP codes 63376, 63304[3].
With 12% of homes built since 2010 and 25% before 1980[1], St. Peters's plumbing runs from brand-new supply lines and fixtures to aging pipe, original valves and water heaters past their rated life.
2 ZIP codes cover St. Peters — 63376 (85% of the city's land), 63304 (11% of the city's land)[6].
The tracked suburbs closest by are St. Charles (4.9 mi E), O'Fallon (6.3 mi W) and Maryland Heights (8.4 mi SE)[3].
25% of St. Peters's 25,557 housing units predate 1980 and 12% went up in 2010 or later[1] — the 5th-lowest pre-1980 share of the 15 St. Louis–area suburbs we cover; nearby, St. Charles (38%), O'Fallon (9%), and Maryland Heights (61%) predate 1980. New-construction problems are usually fittings, supply lines, water-heater installs and drain slopes, not worn-out pipe.
The biggest single slice — 31% — was built 1980 to 1989, and the median home dates to 1988[1]. Neighbours from the same era tend to hit the same plumbing problems at the same time.
Freeze risk: the st. charles forecast zone logged 12 winter-storm, ice or hard-freeze days in 2016–2025, including February 2021; the latest was Dec 1, 2025[4].
Water from the sky is plumbing work too: 8 flood or flash-flood reports within 10 miles over 2016–2025[4], and FEMA logged 534 flood-insurance claims across St. Peters's ZIPs[5]. Homes that take water need working drainage, sump pumps and backflow prevention.
69% of homes heat with utility gas, and 21% of households rent[1].
St. Peters storm calendar
Within 10 miles of St. Peters, 2016–2025: 8 flash-flood reports[4]. Peak: 75% in April, July, and August. Busiest year 2019 (3); 6 of 10 years had none. Busiest month May 2019 (1). Latest: flash-flood report, Jun 4, 2025, 5.0 mi out.
| Month | Flash flood | Flood & heavy rain | All |
|---|---|---|---|
| Apr | 1 | – | 1 |
| May | 1 | – | 1 |
| Jun | 1 | – | 1 |
| Jul | 3 | – | 3 |
| Aug | 2 | – | 2 |
Finding plumbing help around St. Peters
Plumbing repair contractors taking requests around St. Peters cover ZIP codes 63376, 63304.
Before you pick up the phone: before the plumber arrives
The data underneath this St. Peters page
| Measure | St. Peters | Median of 15 | Difference |
|---|---|---|---|
| Built 2010 or later | 12% | 6% | 5 pts higher |
| Built before 1960 | 2.7% | 9.8% | 7 pts lower |
| Built before 1980 | 25% | 54% | 29 pts lower |
| Flood reports (10 mi) | 8 | 14 | 6 fewer |
| Renter-occupied | 21% | 23% | 2 pts lower |
| Median year built | 1988 | 1977 | 11 years newer |
| Utility-gas heat | 69% | 69% | same as median |
Sorted by largest difference. Each median is the middle value across the covered St. Louis–area suburbs, from the same sources.
| City | Flood reports | NFIP claims |
|---|---|---|
| St. Peters | 8 | 534 |
| St. Charles 4.9 mi | 12 | 5,630 |
| O'Fallon 6.3 mi | 6 | 347 |
| Maryland Heights 8.4 mi | 14 | 161 |
| Chesterfield 8.7 mi | 11 | 321 |
| Lake St. Louis 9.8 mi | 5 | 14 |
| ZIP | Claims | Paid | Busiest year |
|---|---|---|---|
| 63376 | 400 | $6,417,902 | 1993 (95) |
| 63304 | 134 | $1,925,854 | 1993 (22) |
ZIPs extend past city limits.
| Date | Type | Distance |
|---|---|---|
| Jun 4, 2025 | Flash Flood | 5.0 mi |
| Apr 4, 2025 | Flash Flood | 6.8 mi |
| Aug 3, 2022 | Flash Flood | 7.3 mi |
| Jul 26, 2022 | Flash Flood | 8.3 mi |
| Jul 30, 2020 | Flash Flood | 6.0 mi |
| Aug 12, 2019 | Flash Flood | 7.2 mi |
| Jul 10, 2019 | Flash Flood | 4.3 mi |
| May 6, 2019 | Flash Flood | 3.6 mi |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 364 | 1.4% | ±130 |
| 2010 to 2019 | 2,595 | 10.2% | ±384 |
| 2000 to 2009 | 3,348 | 13.1% | ±562 |
| 1990 to 1999 | 4,956 | 19.4% | ±503 |
| 1980 to 1989 | 7,831 | 30.6% | ±645 |
| 1970 to 1979 | 5,274 | 20.6% | ±508 |
| 1960 to 1969 | 492 | 1.9% | ±150 |
| 1950 to 1959 | 285 | 1.1% | ±100 |
| 1940 to 1949 | 160 | 0.6% | ±114 |
| 1939 or earlier | 252 | 1.0% | ±133 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 25,557 |
| Detached single-family | 17,332 (68%) |
| Occupied homes | 24,591 |
| Owner-occupied | 19,435 (79%) |
| Renter-occupied | 5,156 (21%) |
| Median home value | $269,900 |
ACS 2020–2024 estimates.
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 16,895 | 68.7% | ±559 |
| Electricity | 7,220 | 29.4% | ±639 |
| Bottled or tank gas (propane, butane, etc.) | 412 | 1.7% | ±172 |
| No fuel used | 50 | 0.2% | ±52 |
| Wood | 14 | 0.1% | ±22 |
| ZIP (ZCTA) | Share of St. Peters's land | Share of the ZIP inside the city |
|---|---|---|
| 63376 | 85% | 48% |
| 63304 | 11% | 5% |
Dated heat and freeze records for the ST. CHARLES forecast zone: see the county list.
plumbing questions from St. Peters homeowners
Are St. Peters homes likely to have old galvanized pipes?
Only an inspection can say, but age is the clue: 3% were built before 1960 and 25% before 1980[1].
How often do pipes freeze in St. Peters?
The record for St. Peters's forecast zone shows 12 winter-storm or freeze days over 2016–2025, in 7 different years[4].
Which ZIP codes are covered in St. Peters?
63376 and 63304[6], in St. Charles County. Nearby suburbs with their own pages: St. Charles (4.9 mi), O'Fallon (6.3 mi), and Maryland Heights (8.4 mi)[3].
My St. Peters home is fairly new — could the plumbing and water heater still be under warranty?
Possibly: 12% of St. Peters's housing units were built in 2010 or later[1], the 5th-highest share of the 15 St. Louis–area suburbs we cover. Check your closing paperwork for warranties before paying for a repair.
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.