Waterproofing CostFind my home

BASEMENT & FOUNDATION WATERPROOFING

See what waterproofing could cost at your home.

Find your house, choose the affected walls and describe the problem. Get a clearer scope before asking for a quote.

Start with the building. Decide about a quote later.

Technician in an unfinished Midwest US basement working on a vertical wall crack.

Understand the work
before you choose the repair.

A damp wall, a leaking joint and a failed sump are different problems. See the selected scope, its source and the price range together.

START WITH WHAT YOU SEE

What is happening below ground?

01

Damp walls

02

Puddles

03

Cracks

04

Musty smell

05

Flooding

White mineral deposits and dark moisture staining on concrete block crawl-space walls in Columbus, Ohio.
Efflorescence and moisture staining on block walls. Photo: iDry Columbus (CC BY 4.0). Cropped, resized and converted to AVIF/WebP.
Concrete block basement wall displaced inward, with large stair-step cracks and separated block courses.
Bowing and displaced blockwork in a basement wall. Photo: 58 Foundations (CC BY 2.0). Cropped, resized and converted to AVIF/WebP.

HOW IT WORKS

From your house
to a clearer estimate.

  1. 01

    Find your home

    Search your address and confirm the correct building on an aerial map.

  2. 02

    Choose the walls

    Tap the walls that need work. We calculate the length from the outline.

  3. 03

    Review your estimate

    Answer a few questions and review the scope, range and next step.

Find my home

HOW THE FIX WORKS

Follow the water.
Understand the work.

01 / INSIDE THE BASEMENT

Give water a way out.

Interior drainage collects water and directs it to a sump system.

Complete American house cut away below ground to reveal an open interior perimeter drain channel and sump basin.
Interior drainage cutaway: the perimeter channel remains open here to show its connection to the sump.
01Collect along the perimeter

The concrete edge is opened so a drain can collect water beside the basement wall. The image shows the open channel before the floor is restored.

02Move water to the sump

The channel leads to a basin. A pump moves the collected water through a discharge pipe. Confirm whether the quoted drain system includes the pump.

03Keep roof water away

Gutters and downspouts help manage roof runoff. A contractor should check the discharge route and surface grading as well as the basement.

02 / OUTSIDE THE FOUNDATION

Stop water at the wall.

Exterior work adds excavation, access and restoration to the scope.

Complete American house with exterior foundation membrane, gravel footing drain and excavation access visible.
Exterior waterproofing: membrane, drainage and working space are separate parts of the job.
01A barrier on the outside

The membrane limits water entry through the wall. The drainage board protects the membrane and gives water a path down to the footing drain.

02Drainage at the footing

A gravel bed and drain collect water at the base of the foundation. The outlet, elevation and discharge route need to be confirmed for the property.

03Room to do the work

Access for equipment, excavated soil and surface restoration can change the scope. Excavation depth and protective systems require a site-specific plan.

COST & PLANNING

Price the right scope.

The recorded interior drain and sump reference is $40–$85 per ft. Your selected length gives it context; access, method and restoration change the work needed.

Cost insights

Interior drain / sump system
$40–$85 / ft
Exterior foundation drain only
$30–$90 / ft
Crack injection
$250–$800+ / minor crack

Published national references, recorded 24 Oct 2026. Membrane, access and restoration are separate scopes. HomeGuide waterproofing · Interior drain reference.

BEFORE YOU DECIDE

Good questions to start with.

How much does basement waterproofing cost?

The recorded interior drain and sump reference is $40–$85 per ft. Access, water entry, method and restoration change the scope; a contractor confirms the final price.

How is the wall length calculated?

Search your address and choose the building on the map. The calculator measures the outline edges you select, including a percentage of a wall. These are approximate map measurements and need to be checked on site.

Which waterproofing method should I choose?

Water at a wall-floor joint, water through a crack and water entering at a window well can require different work. The calculator explains a starting option; a contractor should identify the source and confirm the repair.

What is included in the price?

The estimate names the selected work and its published installed cost reference. An interior drain reference may already include a sump pump. Taxes, permits, finish restoration and unmeasured work need separate confirmation.

Will requesting an estimate contact a contractor?

No. Viewing an estimate is separate from asking for a quote. A quote request requires its own recipient disclosure and consent.

WATERPROOFING & PLANNING

Understand your next step.

What does basement waterproofing cost?

Compare installed work, a measured example and the factors behind the range.

Interior and exterior price references

Compare the recorded rates and the work each reference includes.

Six things that affect the cost

Consider depth, access, water entry, finished rooms and restoration.

LOCAL PLANNING

Waterproofing where you live.

Start with your actual home. Local labor, discharge requirements and access can affect the scope.

Cincinnati, OHDetroit, MIColumbus, OH

START WITH YOUR ADDRESS

Find the walls.
Understand the cost.