How much does basement waterproofing cost in Gresham, OR?

Most Gresham homeowners spend between $3,300 – $13,200 on basement waterproofing, with an average around $7,150. Local labor prices 10% above the national average, so Gresham quotes tend to land at the higher end of national ranges.

Why is basement waterproofing more or less expensive in Gresham than elsewhere?

Gresham is one of the more affordable Portland-area submarkets. Persistent rain drives drainage and gutter spend.

Do I need a permit for basement waterproofing in Gresham, Oregon?

City permits required for roofing and structural work. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Gresham?

Get at least three written quotes from licensed, insured Oregon contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Portland market.

How much does basement waterproofing cost?

$3,000 to $12,000 on average. Interior drainage is $3,000 to $10,000; exterior excavation is $8,000 to $25,000.

Interior or exterior waterproofing?

Interior drain tile manages water that gets in and costs far less. Exterior membrane keeps water out entirely and is the permanent fix, at two to three times the price.

How much is a sump pump?

$1,000 to $3,000 installed, plus $500 to $1,500 for a battery backup that keeps working during a storm outage.

Is waterproofing covered by insurance?

Groundwater seepage is excluded from standard homeowners policies. Separate flood insurance or a water backup endorsement is required.

Will waterproofing fix mold?

It stops the moisture source, but existing mold needs separate remediation, typically $1,500 to $6,000.

Does a dry basement add value?

Yes — a documented, warrantied waterproofing system removes a major buyer objection and enables finishing the space.

Home/Cost guides/Basement Waterproofing/Gresham, OR

Portland · Oregon

Basement Waterproofing cost in Gresham, OR

Gresham homeowners typically pay $3,300 – $13,200 for basement waterproofing. Local labor and materials price 10% above the national average.

Get my Gresham estimate Use the Gresham calculator

Gresham average

$7,150

Typical low

$3,300

Typical high

$13,200

Per linear foot

$44 – $275

Sample ZIP

97030

What drives Gresham pricing

Local labor

Gresham is one of the more affordable Portland-area submarkets.

Permits & code

City permits required for roofing and structural work.

Climate & conditions

Persistent rain drives drainage and gutter spend.

Instant cost calculator

Adjust the inputs to see live pricing

Wall length to treat80 linear feet

Method

Foundation depth

Exterior access

Water problem

Estimated project cost

$440 – $1,360

Most homeowners pay around $900

Compare method

Cost by material in Gresham

Installed Gresham pricing per linear foot.

Option	Installed cost	Pros	Cons
Interior sealant	$6 – $17	Cheapest, DIY possible	Cosmetic — does not stop hydrostatic pressure
Interior drain tile + sump	$44 – $110	Effective, no landscaping destroyed, done in days	Relies on a pump and power
Exterior membrane	$110 – $275	Stops water before it reaches the wall — the permanent fix	Most expensive and disruptive
Crawlspace encapsulation	$22 – $66	Controls humidity, mold and energy loss	Needs a dehumidifier to keep working
Wall reinforcement	$88 – $220	Addresses bowing plus water together	Structural scope and engineering

Where the money goes in Gresham

A typical $7,150 Gresham project, broken down by line item.

Labor and excavation50% · $3,575
Drainage materials22% · $1,573
Sump pump and equipment16% · $1,144
Concrete restoration and disposal12% · $858

Common add-ons

Extras that show up on Gresham quotes but rarely in the headline price.

Sump pump

$660 – $2,200

Battery backup

$550 – $1,650

Dehumidifier

$1,300 – $3,300

Mold remediation

$1,650 – $6,600

Vapor barrier

Per square foot

$2 – $7

Egress window

$2,750 – $6,600

Ways to save in Gresham

Do the cheap exterior fixes first — gutters, downspout extensions and grading solve many wet basements for under $1,000.
Choose interior drain tile over exterior excavation unless the wall itself is failing.
Get bids from waterproofing specialists and a general contractor; approaches and prices differ enormously.
Ask about a transferable lifetime warranty — it holds value at resale.
Install the sump and drainage before finishing the basement, never after.

Gresham FAQs

Get a Gresham price you can budget against

Answer a few questions about your project and we'll model a low, average and premium price for your OR ZIP code — then connect you with vetted local pros.

Get waterproofing quotes

More Gresham research

Best basement waterproofing companies in Gresham Basement Waterproofing permits in Oregon Basement Waterproofing near me All Oregon prices

Basement Waterproofing cost near Gresham

Basement Waterproofing cost in Vancouver, WA

$3,360 – $13,440

Basement Waterproofing cost in Portland, OR

$3,540 – $14,160

Basement Waterproofing cost in Beaverton, OR

$3,450 – $13,800

Basement Waterproofing cost in Hillsboro, OR

$3,420 – $13,680

More Oregon cities

Salem Eugene Bend Medford Corvallis Springfield

Other project costs in Gresham

Fence Installation in Gresham

$1,650 – $4,400

Roof Replacement in Gresham

$9,350 – $37,400

Kitchen Remodel in Gresham

$19,800 – $104,500

HVAC Replacement in Gresham

$6,050 – $19,800

Deck Building in Gresham

$4,840 – $13,200

Window Replacement in Gresham

$495 – $1,650

See every Gresham cost guide