Basement Waterproofing in West Allis, WI
Whether you live in your West Allis, WI house or own a two-family home and rent out a unit, the short form is the place to describe a basement that takes on water. It goes to one independent local contractor, who contacts you and handles any visit and written estimate.
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Wet Basement Help for West Allis, WI Homes
With 60,119 people (July 2025 Census estimate), West Allis is the largest of the five places this site covers. It is its own city in Milwaukee County, about 6 miles west-southwest of Milwaukee City Hall. About 56% of homes are owner-occupied, and the median value, $203,800, is the lowest of the five.
This site is a referral and advertising service; it does no basement work, plumbing, pricing or contract signing. Your request to be contacted lands with one independent contractor. That firm may pay a flat sum to advertise here, though a trial means nothing is charged yet, and owners never pay or get paid.
Honey Creek, Allis-Chalmers and Postwar Blocks
Before the 1880s the area went by Honey Creek. The city is named for Edward P. Allis; his firm turned into Allis-Chalmers in 1901. When it built a large plant here in 1902, the community incorporated as the Village of West Allis, and it became a city in 1906. Between 1910 and 1930 its population grew fivefold, making it Milwaukee's largest suburb.
Census survey data place the typical home at about 1956, with about 26% of the 30,294 homes built in 1939 or earlier, 11% in the 1940s and 22% in the 1950s, roughly 17,900 before 1960. Where a house has a basement, it is often a 1940s or 1950s block or poured one; not every house has one, and this page is for those that do.
Basement Fixes Around West Allis, WI
See basement drainage for drain tile and grading.
Honey Creek and the August 2025 Rain
The upper Root and Kinnickinnic rivers flow through West Allis, as does Honey Creek. On August 2, 2020, the National Weather Service noted Honey Creek flooding up to the road, which it called uncommon.
The August 9–10, 2025 storm dropped about 8.94 inches on the city (State Climatology Office). Residents described basements that filled, and one neighbor was putting in two more sump pumps (Spectrum News 1). No waterproofing stops flash flooding, but it does address the everyday case: seepage through block, clay-rich soil that can stay wet against a wall, and pumps that fall behind.
West Allis, WI Permits and the City Sewer
The Building and Sign Division is reached through the city's main line, 414-302-2489, at City Hall, 7525 W. Greenfield Ave. Excavation, foundation and structural repairs generally call for a city permit, and plumbing or sewer work for a separate one taken out by a licensed plumber. The contractor should name each permit before you sign and file it before work begins.
West Allis runs its own sanitary sewers, separate from storm sewers, and MMSD treats what flows through them. Report a backup on the same line, and ask the city ahead of time about after-hours help. Whether a backwater valve makes sense for your house is a question for a licensed plumber, and installing one needs a plumbing permit.
What Basement Work Costs in West Allis, WI
These ranges are national; no source tracks West Allis or Wisconsin prices.
| 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) |
One wall of drain with a working pump sits low; a full perimeter plus a new pump sits higher. The cost calculator shows the spread for your size.
One Request for West Allis, WI Homes
Check Your Block Before You Send
Enter your address to confirm coverage, then use the checker if you can't tell seepage from a sewer issue.
Answers for West Allis, WI Homes
I own a two-family house and rent the upper unit. Can I send a request?
Yes, as the owner. Requests come from owners, including people who live in one unit and rent the other. Tenants with a wet basement should talk to their landlord instead, since the owner decides on any work and signs any contract.
Is adding a second sump pump worth it?
It can be, where one pump struggles in long storms. A second pump or a battery backup spreads the load, and the water should land outside, roughly 6 to 10 feet out, never sent to a floor drain or tub. A contractor can size it after seeing the pit.
Who do I contact about a sewer backup in West Allis?
The city, at 414-302-2489. Its after-hours arrangements were not confirmed for this page, so check with the city before you need them. A clog or break in your own lateral is generally a job for a licensed plumber, not the city or a waterproofing contractor.
Does MMSD have anything for older private pipes here?
MMSD runs Pipe Check across its service area, which includes West Allis. It is MMSD's own program, offering incentives for certain private-pipe work done by contractors on MMSD's list, and MMSD sets and can change the terms. Questions go to (414) 225-2250.
Next Door to West Allis, WI
North across the Menomonee River valley there is a page for Wauwatosa, WI, and down the lakeshore one for South Milwaukee, WI, a separate city.
Start Your West Allis, WI Request
Note when the water shows up and whether the sump keeps pace, then fill in the form. One independent contractor will get back to you, and you decide whether anything happens next. Ask for a lien waiver with each payment, and take any complaint to the DATCP Consumer Protection Hotline, (800) 422-7128.