Missouri · 11 covered places · 11 ZIP codes
Plumbers in Jefferson County, MO
We cover 11 cities and towns in Jefferson County, Missouri, across 11 ZIP codes, including Arnold, Imperial, Festus. About 177,000 people live in those ZIP codes. Most homes date from 1980 to 1999, old enough that original water heaters, valves and drains are wearing out.
| Year built | Share of homes |
|---|---|
| Before 1940 | 3% |
| 1940–1959 | 12% |
| 1960–1979 | 27% |
| 1980–1999 | 32% |
| 2000 or later | 26% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
| Place | Residents in covered ZIPs | Built before 1960 |
|---|---|---|
| Arnold | 34,405 | 12% |
| Imperial | 28,741 | 9% |
| Festus | 27,913 | 20% |
| De Soto | 20,357 | 26% |
| Hillsboro | 17,681 | 13% |
| High Ridge | 17,480 | 11% |
| Barnhart | 10,977 | 6% |
| Pevely | 8,365 | 13% |
| Cedar Hill | 6,291 | 16% |
| Crystal City | 4,490 | 42% |
What goes wrong in Jefferson County homes
1980s and 90s construction and polybutylene
32% of homes were built between 1980 and 1999. Polybutylene supply pipe was installed widely in US homes from about 1978 to 1995, so houses from these years are worth checking for gray plastic pipe stamped PB2110, usually visible at the water heater or under sinks. Insurers and buyers often ask about it. See polybutylene replacement.
Winter freezes
42% of homes here were built before 1980, when pipes were more often run through exterior walls and uninsulated crawl spaces. In a cold Missouri winter those are the lines that freeze and split. See frozen and burst pipe repair.
Hard water
Missouri water is generally hard. With 57% of homes here on electric heat, scale on electric water heater elements is a frequent failure. See water softener installation.
Common plumbing work in Jefferson County
Other covered towns in Jefferson County
- Arnold (1 ZIP)
- Barnhart (1 ZIP)
- Cedar Hill (1 ZIP)
- Crystal City (1 ZIP)
- De Soto (1 ZIP)
- Festus (1 ZIP)
- High Ridge (1 ZIP)
- Hillsboro (1 ZIP)
- Imperial (1 ZIP)
- Kimmswick (1 ZIP)
- Pevely (1 ZIP)
Jefferson County plumbing FAQ
Which towns in Jefferson County do you cover?
11 places: Arnold, Barnhart, Cedar Hill, Crystal City, De Soto, Festus, High Ridge, Hillsboro, Imperial, Kimmswick, Pevely. Enter your ZIP code to confirm coverage for your street.
How old are homes in Jefferson County?
Across the covered ZIP codes, Census estimates put 15% of homes as built before 1960, 27% from 1960 to 1979, 32% from 1980 to 1999 and 26% in 2000 or later.
Who licenses plumbers in Jefferson County, MO?
Missouri has no statewide plumbing license; cities and counties such as St. Louis and Kansas City license plumbers locally.
Housing and heating figures are US Census Bureau ACS 2023 5-year estimates for the ZIP code areas we cover in Jefferson County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Jefferson County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.