Basement Waterproofing in University City, MO
University City, MO has the oldest housing of the five St. Louis County cities this site covers, and the River des Peres begins inside its borders. Describe your wet basement in the short form, and this free referral service hands it to one independent local contractor, who visits and writes the estimate.
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Dry Basements Start Here in University City, MO
Publisher E.G. Lewis laid out this city, which incorporated in 1906 with him as first mayor; his 1903 Magazine Building is still City Hall. About 34,657 people live here (2025 Census estimate), roughly 8 miles west of downtown St. Louis, in a city of St. Louis County with its own permit office.
To be clear, this is a referral service with no contractor license from University City or anyone else. It sends no workers and quotes no prices. Contractors may buy advertising here, free during a trial for now. Nobody who asks is charged or given anything.
Streetcar Homes and Post-War Blocks in University City, MO
The median home here dates to 1949, and about 38% went up before 1940, the largest share of the five suburbs on this site (Census survey). About 56% are owner-occupied, with a median value of $306,700.
The south end holds streetcar-era houses and 1920s apartment buildings along Delmar, often over brick or stone with tired mortar. The north end is mostly post-war, on block or poured walls where water finds cracks and the floor joint.
- Joints that crumble at a touch. Soft mortar in old brick or stone lets damp creep through, often low on the wall.
- A damp line along the floor edge. In newer basements, the seam between wall and slab often lets water in after rain.
- Water from below, not the side. An overflowing floor drain is a sewer matter (see the questions below).
How Each Service Fits University City, MO
- Full basement waterproofing. An interior drain and sump suits older south-end houses, where digging outside means working around porches and close neighbors.
- Leak repair. One wet corner, window well or old pipe opening can often be handled alone.
- Foundation crack repair. Poured walls up north may suit injection; brick and stone usually need repointing.
- Sump pumps. Many pre-war basements never had a pit. Tying a sump into the house drain is work for a County-licensed plumber or drainlayer.
- Basement drainage. Downspouts, grading and drain tile move roof water away from the wall.
Read more on basement leak repair and sump pump installation.
The River des Peres and July 2022
The River des Peres rises within University City, flows north, bends near Ruth Park and leaves through culverts toward the City of St. Louis. KMOV has called it the most flood-prone stream in Missouri. On July 26, 2022, Lambert airport logged 8.64 inches of rain, its wettest day on record (National Weather Service).
More than 300 University City homes flooded that day, and water stood about 5 feet deep on Dartmouth Avenue (KMOV). The city added three river gauges and Code Red alerts, and in March 2025 federal officials cleared buyout payments for over a dozen properties, including homes on Wilson Avenue.
Most basement water here is quieter: a seep after spring storms, helped by clay soil that can hold water against a wall. A drain and sump deal with seepage, not a river rising over the yard.
Permits and Plumbers in University City, MO
Permits come from Planning & Zoning at City Hall, 6801 Delmar Blvd, 314-505-8500; City of St. Louis licenses and permit rules don't carry over. Plumbing permits go only to County-licensed master plumbers or drainlayers.
If a job ties a sump into the drain, adds a backflow valve or touches the lateral, ask in writing who does that part and who pulls the permit. The contractor confirms with Planning & Zoning what your job needs.
University City, MO Costs and Resale
No price list covers University City alone, so these rows are national. Soft old mortar or a first sump pit can push a job higher.
| Cost row | Figure | Source (year) |
|---|---|---|
| Typical basement waterproofing project | about $3,000 to $10,000 (average about $5,000) | Fixr national (2026) |
| Interior perimeter drain, per linear foot | $40 to $120 | Fixr national (2026) |
| Sump pump installation | $600 to $2,500 | Fixr national (2026) |
| Epoxy crack injection, per crack | $250 to $1,000 | Fixr national (2026) |
| Waterproof paint or sealant, per sq ft | $1 to $8 | Fixr national (2026) |
Selling? The city strongly advises an occupancy inspection first, and buyers' agents often ask for one, so a listing is a common time to settle a wet basement. For a rough drain-and-pump number, try the cost calculator.
Local Help, One Request
- One contractor, not a stack of them. Each request reaches a single independent contractor working in University City.
- Someone who knows the ground. From the Delmar Loop to the north end, local contractors see these walls again and again.
- An estimate you can compare. Ask for feet of drain, pump model, discharge point and a payment schedule.
Ask to see liability insurance and workers' comp papers, and whether the warranty passes to a buyer. Skip anyone wanting cash or full payment up front.
Check Your Address and Your Symptoms
Confirm a contractor covers your street, then let the wet basement checker sort seepage from a sewer backup.
University City, MO FAQ
Dirty water rose out of my basement drain. Who handles that?
That sounds like a sewer backup, not seepage. Report it to MSD's 24-hour line, (314) 768-6260; MSD serves University City. If MSD's system caused it, MSD may repay some losses reported within 30 days, and its Sewer Backup Prevention Program may fund a backflow device for repeat cases.
Does University City help with a broken sewer lateral?
Its lateral program covers the first $2,500 for homes with six or fewer units, but not pipes inside or under the house. The lateral is the owner's pipe, so ask the program at 314-505-8570 before any digging.
Can I pull my own permit for a sump tied to the drain?
Often not. Homeowner permits here can't cover laterals or building drains, so drain work goes to a County-licensed plumber or drainlayer. Planning & Zoning can say what applies to your job.
My street flooded in 2022. Will waterproofing protect the basement next time?
A drain and sump handle groundwater pressing through walls and floors. Floodwater pouring in over the ground is different, and no system promises against it.
Will my homeowners policy pay for basement water?
Seepage is commonly excluded, and sewer backups often need a separate endorsement. Check the wording of your policy and ask your insurer or agent; this site takes no part in insurance matters.
Nearby Towns
This site also has pages for Webster Groves, MO to the south, Kirkwood, MO farther southwest and Florissant, MO in North County.
Reach a Contractor in the University City, MO Area
Note where the water appears and what your walls are made of, then send the short form. One independent contractor in University City will be in touch to set a visit; hiring anyone is your decision.