HomeMatchup
21 sections · Waterproofing

Waterproofing, a dry floor after heavy rain

It usually starts with a basement that smells like a basement. The hard part is not the work - it is that every waterproofing company sounds equally sure of itself, and you get one guess. We check licence and insurance before we introduce anyone, and we record the date we checked.

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Waterproofing in short

Waterproofing services fall into four groups: exterior work (excavating to the footing, sealing the wall with a membrane and adding a footing drain), interior work (a perimeter drain channel and a sump pump that collects water and pumps it out), targeted crack repair (epoxy or polyurethane injection), and surface and site work (sealers, gutters, downspout extensions and regrading). Interior drainage plus a sump pump is the most common paid job, typically $4,000-$8,000, while full exterior waterproofing usually runs $5,000-$15,000 (HomeCostLab, 2026).

Basement waterproofing costs $3,000-$10,000 on average in 2026, with most homeowners spending around $5,000, or roughly $3-$10 per square foot (Fixr, 2026). Interior perimeter drainage runs $40-$120 per linear foot, exterior French drains $10-$100 per linear foot, sump pump installation $600-$2,500, and single crack injection $250-$1,000 per crack.

What we promise, and what we do not

How a pro gets in front of you

Most sites sell your number to whoever pays the most for it. We do not - your details reach only the waterproofing companies matched to your job. We are building licence and insurance checks on top of that, and we will publish each one with the date it was performed rather than claim it in advance.

A few pros, never a list

Your details go to the small number of local companies matched to your job, and to nobody else. They are not sold on.

No paid placement

A company cannot buy a better position in a match or in our rankings. Where we rank, the method is published so you can re-score it yourself.

Check the licence yourself

Ask for the number and look it up on your state board’s public register. We are building this into the match; it is not running yet.

Ask the insurer, not the contractor

Get liability and workers’ compensation certificates sent to you by the insurance agency direct. A forwarded PDF proves nothing about today.

What we check, and what we do not check yet

No verified waterproofing price ranges published yet.
We don’t publish a cost until we can show the data behind it. If you need a number today, the quote form gives you real prices from local companies.

Honest comparison

HomeMatchup vs. a lead site vs. doing it yourself

Three ways to get this work done. Here’s what each one actually gives you.

Getting waterproofing work done - three routes compared
HomeMatchup Typical lead site DIY
How many companies call youA short, named shortlist you agreed toOften 4-5+ at once, sold to whoever buys the leadNone - the work is on you
Licence & insuranceSelf-reported today - we tell you how to check it and are building the check inUsually self-reported by the contractorYour own permits and liability
What it costs youFree - pros pay us, and only for a real matchFree, but your number is resoldMaterials plus your time
Price guidance before you talkPublished ranges with the data behind themRarely shown before you hand over detailsYou research it yourself
If it goes wrongA named company, and a record of who received your jobHard to trace which site sold the leadNo recourse

Describes how HomeMatchup operates and the common lead-generation model. Not a claim about any named competitor.

Homeowners

What people say after they’ve hired

Zero reviews. On purpose.

We’d rather show you nothing than show you someone else’s reviews.

Plenty of sites fill this space with reviews scraped from elsewhere, or written for them. We don’t. The first waterproofing review on this page will come from a homeowner we matched, after their work was finished and paid for.

  • Only from homeowners we actually matched
  • Only after the job is complete
  • Published unedited, including the bad ones
  1. 1You get matchedA few checked pros, free
  2. 2Work gets doneCheck their licence and insurance first
  3. 3We ask youOnce, after completion
  4. 4It appears hereExactly as you wrote it
FAQ

Waterproofing questions, answered

The questions homeowners ask us most about waterproofing.

Fixr puts average cost at $3,000-$10,000, most commonly around $5,000, or roughly $3-$10 per square foot. HomeCostLab: interior systems $2,000-$7,000, exterior waterproofing $5,000-$15,000, and interior French drain plus sump pump about $4,000-$8,000. Crack injection runs roughly $250-$1,000 per crack (Fixr). See our cost guide.
Interior drainage manages water after it enters and is usually cheaper and less disruptive ($2,000-$7,000). Exterior seals the wall and drains water before it reaches the foundation ($5,000-$15,000) because of excavation. If the wall is sound and you mainly want a dry floor, interior is often enough; deteriorating walls or a finished basement you are protecting often justify exterior. See waterproofing services.
Usually not, but mold is the clock. EPA advises fixing the water problem first, because cleaning mold without fixing moisture means it returns. EPA also says a moldy area under about 10 square feet can usually be handled yourself; larger than that, get a professional. Bowing walls are a structural emergency category, not a waterproofing sales call.
Fixr puts installation at $800-$2,000 on average (around $1,400 typical). A battery backup adds $150-$2,000. Replacing an existing pump in an existing pit is cheaper at $350-$1,000.
Averages assume a straightforward basement. Deep foundations, hard access, long perimeters, exterior excavation and restoring driveways or decks all push past the $3,000-$10,000 typical band. Access is often the biggest driver.
See all 1 waterproofing question

The wrong waterproofing hire costs more than the right one.

Waterproofing gets sold before anyone finds out where the water is coming from. Treating the symptom indoors leaves the source outdoors. Getting matched takes about a minute, costs nothing, and you can walk away from every quote you receive.

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Who wrote and checked this

Written by

The HomeMatchup Content Team

Editorial
Reviewed by

Michael Thompson

Senior Home Improvement Reviewer · 20 years

Senior technical reviewer.

Team-written. Second-person reviewed. Sources dated. Report a correction.

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