Local figures used in this guide
For 2020-2024, Census QuickFacts counts 31,030 households in Appleton, WI, with 2.34 persons per household. QuickFacts puts the owner-occupied housing unit rate for 2020-2024 at 67.1% and the median value of owner-occupied housing units for the same period at $231,400. Median household income, in 2024 dollars, was $80,483 for 2020-2024, and per capita income was $50,397. Median gross rent for 2020-2024 was $1,030.
The nearest NOAA engineering weather station is at Green Bay. In an average year at Green Bay, about 21 miles from Appleton, NOAA counts about 165 hours with the wet-bulb temperature above 73°F and about 701 hours above 67°F. Those are counts for Green Bay, about 21 miles from Appleton, not for Appleton itself.
Why this guide lists no prices
Waterproofing prices swing with the size of the basement, what is in the way, how deep the footing sits and how much of the job is really needed. A range printed on a web page would mislead more than it helps. What you can control is the scope. If every company prices the same list of items, the totals become comparable, and the gaps between them start to mean something.
The diagnosis visit
Some companies charge for an inspection and credit it back if you hire them; others include it. Either works if the findings come back in writing. A useful report names where the water enters, how the inspector knows, whether any of the moisture is condensation, and whether any crack shows movement. Photos and moisture-meter readings make it more useful still. A visit that ends with a single system and a single price, and no explanation, tells you very little.
Gutters, downspouts and grading
These sit at the low end of a waterproofing budget and sometimes solve the whole problem. Price drivers:
- feet of gutter replaced or re-hung, and whether outlets are enlarged;
- the number of downspouts and how far the extensions or buried lines run;
- how much soil has to come in to rebuild the slope, and how much it has to be moved by hand around shrubs, a walk or an air-conditioner pad;
- window well covers, liners or drains.
Ask whether the company does this work itself or expects you to hire a landscaper or gutter crew.
Crack injection
Non-structural cracks are usually sealed one at a time and priced per crack or by length. What changes the number: wall height, whether shelving, paneling or a finished wall has to come off first, and the product used. A crack that shows movement belongs in a separate line with an engineer's assessment ahead of any repair. Expect that fee to be separate from the waterproofing proposal.
Interior drain and sump
The perimeter drain can be the largest interior line. It moves with:
- linear feet of wall covered, and whether the drain runs on two walls or all four;
- floor thickness and obstacles such as stairs, a furnace, a water heater or built-in shelving;
- patching and finishing the floor edge afterward;
- any wall membrane tied into the drain.
The sump line covers the basin, the pump, a check valve, a lid and the discharge pipe. Two pumps can look alike and cost very differently, so ask for the model, its capacity, and whether a battery backup or a second pump is part of the price or an add-on. Ask how the outlet will be protected from freezing and where the water will land.
Exterior excavation
Digging down to the footing to apply a membrane, drain board and footing drain is the heaviest item when it appears. The cost depends on depth, feet of wall, machine access, and what stands in the way: a deck, steps, a driveway section, plantings or utilities. Ask whether hauling soil, backfilling, compaction and restoring the lawn or hardscape are included or billed later.
Dehumidifiers and air sealing
If the plastic-sheet test or the inspector's readings point to condensation, a drain will not fix it. Price drivers here are the basement's volume, the dehumidifier's capacity, whether it drains by gravity, into a floor drain or into the sump, and any sealing at the rim joist or insulation on cold-water pipes bundled into the same line.
Permits and paperwork
Ask each company which city permits the job needs, who pulls them, and whether the permit fee is in the total. Ask what state license, if any, covers this work, and what the number is. Ask for proof of liability coverage and workers' compensation before work starts.
Comparing two proposals
Write the items above down one side of a page and fill in each company's figures beside them. Differences show up fast: three walls of drain against four, a backup pump in one and not the other, regrading included or left to you. Compare totals only after the scopes line up.
When one figure sits well below the others, find the missing line before you sign. When one sits well above, ask what the company saw that the others did not. Keep the deposit modest, tie payments to finished stages of work, and read the warranty's exclusions and transfer terms as carefully as its promises.