St. Louis County · Saint Louis, MO
Plumbers in Saint Louis, MO
Saint Louis is in St. Louis County, Missouri. About 892,000 people live in the 50 ZIP codes we cover here, in roughly 452,000 homes, 60% of them single-family detached houses. The biggest share of the housing was built before 1940 (31%), and that age decides most of what goes wrong with the plumbing.
- Same-day service when a plumber is available
- 50 ZIP codes covered
ZIP codes we cover in Saint Louis
63101, 63102, 63103, 63104, 63105, 63106, 63107, 63108, 63109, 63110, 63111, 63112, 63113, 63114, 63115, 63116, 63117, 63118, 63119, 63120, 63121, 63122, 63123, 63124, 63125, 63126, 63127, 63128, 63129, 63130, 63131, 63132, 63133, 63134, 63135, 63136, 63137, 63138, 63139, 63140, 63141, 63143, 63144, 63145, 63146, 63147, 63151, 63155, 63167, 63188
Saint Louis homes and their plumbing
Here is how Saint Louis's homes break down by year built, based on Census estimates for the covered ZIP codes: before 1940 31%, 1940–1959 26%, 1960–1979 23%, 1980–1999 11%, 2000 or later 9%. With that many older homes, original galvanized supply pipe and cast iron or clay drains are still common, so leaks, rust and root intrusion come up often. Neighboring areas such as Florissant are covered too.
| Year built | Share of homes |
|---|---|
| Before 1940 | 31% |
| 1940–1959 | 26% |
| 1960–1979 | 23% |
| 1980–1999 | 11% |
| 2000 or later | 9% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
- Residents in covered ZIPs
- 891,907
- Housing units
- 452,489
- Single-family detached
- 60%
- Owner-occupied
- 58%
- Heated with utility gas
- 73%
- Heated with electricity
- 25%
What goes wrong in Saint Louis homes
Pre-1960 homes: galvanized pipe and cast iron
58% of homes in Saint Louis's covered ZIP codes were built before 1960, 31% of them before 1940. Houses that old often still have galvanized steel supply lines that rust closed from the inside, and cast iron or clay sewer pipe that cracks and lets roots in. Weak pressure at upstairs fixtures, brown water after a shutoff and slow drains are the usual clues. Typical fixes are whole-house repiping and a sewer camera inspection.
Natural gas in most homes
73% of occupied homes here heat with utility gas, so gas water heaters, ranges and dryers are common. That means gas line extensions for new appliances, flexible connector replacements and venting checks when a water heater is swapped. If you smell gas, leave first and call the gas utility from outside. See gas line repair.
Winter freezes
80% 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 73% of homes here on gas, scale settles as sediment in gas water heater tanks, which then rumble and wear out early. See water softener installation.
Common calls in Saint Louis
- Whole-House Repiping
- Gas Line Repair
- Frozen & Burst Pipe Repair
- Water Softener Installation
- Water Heater Replacement
- Drain Cleaning
- Main Water Line Repair
- Sewer Line Repair
Also available in Saint Louis: emergency plumbing and every plumbing service.
Saint Louis at a glance
- County
- St. Louis County
- Nearest city pages
- Florissant
- ZIP codes
- 63101, 63102, 63103, 63104, 63105, 63106, 63107, 63108, 63109, 63110, 63111, 63112, 63113, 63114, 63115, 63116, 63117, 63118, 63119, 63120, 63121, 63122, 63123, 63124, 63125, 63126, 63127, 63128, 63129, 63130, 63131, 63132, 63133, 63134, 63135, 63136, 63137, 63138, 63139, 63140, 63141, 63143, 63144, 63145, 63146, 63147, 63151, 63155, 63167, 63188
Saint Louis plumbing FAQ
How old are the homes in Saint Louis?
In the ZIP codes we cover around Saint Louis, Census estimates put 58% of homes as built before 1960, 23% from 1960 to 1979, 11% from 1980 to 1999 and 9% in 2000 or later. The largest group is before 1940 (31%).
Who licenses plumbers in Saint Louis, MO?
Missouri has no statewide plumbing license; cities and counties such as St. Louis and Kansas City license plumbers locally.
Are water heaters in Saint Louis usually gas or electric?
Census data for the area show 73% of homes heating with utility gas, 25% with electricity. Water heaters often use the same fuel as the home's heat, so utility gas is the most common here, but check the label on your tank before you shop for a replacement.
Guides for Saint Louis homeowners
Nearby areas
Also covered nearby: Saint Ann (10 mi), Creve Coeur (11 mi), Fenton (13 mi), Hazelwood (13 mi), Bridgeton (13 mi), Maryland Heights (14 mi), Oakville (14 mi), Valley Park (15 mi).
Housing, heating and population figures are US Census Bureau American Community Survey 2023 5-year estimates for the ZIP code areas we cover in Saint Louis, so they may include neighboring communities that share those ZIP codes.
Need a plumber in Saint Louis?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.