Bathroom Remodeling in St. Louis, MO
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St. Louis at a Glance
| Factor | St. Louis | Source |
|---|---|---|
| Population | 288,512 (ACS 2020–2024 5-year estimate) | Census Reporter / U.S. Census Bureau ACS |
| Median year homes built | 1938 — among the oldest housing stock of any major U.S. city (ACS 2020–2024 5-year) | Census Reporter / U.S. Census Bureau ACS |
| Contractor business license | Construction-contracting businesses in the city need a Graduated Business License from the License Collector, with clearance from the Collector of Revenue | City of St. Louis License Collector |
Remodeling a Bathroom in St. Louis
St. Louis's median home was built in 1938 — pre-war brick rowhouses, four-squares, and bungalows dominate — which makes it one of the oldest big-city housing stocks in America and puts nearly every original bathroom two generations past its plumbing's design life. Cast-iron stacks (50–60 years per InterNACHI) and galvanized supply lines (40–50 years per Roto-Rooter) are default replacement items in city remodels, and thick masonry walls mean layout changes take real planning. Note the jurisdictional quirk: the City of St. Louis is an independent city, separate from St. Louis County, and each has its own permitting and licensing — the city requires construction contractors to hold a Graduated Business License, while the county runs a mechanical licensing program for trades.
Weather adds its own pressures: the 1993 flood crested nearly 20 feet above flood stage near St. Louis per NOAA's Missouri climate summary, and extreme rain events have increased since 2005 — relevant to the basement bathrooms common in city homes — while winter cold snaps threaten pipes in uninsulated brick exterior walls.
Verify your contractor: Missouri has no statewide contractor license, so verify credentials with your city or county — for example through Kansas City's contractor licensing program or the City of St. Louis construction-contracting business license.
Bathroom Remodeling in St. Louis: FAQ
How much does a bathroom remodel cost in St. Louis?
Because the city's median home dates to 1938, full remodels usually include re-piping and land in the upper half of Angi's $2,500–$30,000 national range (average $12,142). Cosmetic refreshes of already-updated bathrooms in rehabbed homes can come in well under the average — St. Louis trades are competitively priced.
City of St. Louis or St. Louis County — does it change my remodel rules?
Yes. They are separate jurisdictions: the independent city issues its own permits and requires contractors to hold a city Graduated Business License, while the county has its own permitting and a mechanical licensing program for plumbing/HVAC trades, plus municipal rules in its 80-plus municipalities. Confirm your contractor is credentialed where you actually live.
Are basement bathrooms risky in St. Louis homes?
They're common but deserve flood-aware design. NOAA documents increasing extreme rainfall in Missouri and the region's history of major flooding, so a city basement bath should include backflow protection, a reliable sump, and an ejector pump where drains sit above the sewer — all much cheaper to install during the remodel than after a backup.
What's different about remodeling a bathroom in a 1930s brick St. Louis home?
Expect original cast-iron and galvanized plumbing past its lifespan, plaster-on-masonry walls that complicate rerouting, small original footprints, and floors that have settled. The payoff: solid-brick construction is worth the investment, and Zonda's national data shows midrange bathroom remodels recouping about 80% at resale.
Bathroom Remodeling Near St. Louis
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