Basement Waterproofing Cost in Seattle, Washington

Basement waterproofing cost in Seattle, Washington ranges from $2,400 to $9,700 depending on the type of waterproofing required. Exterior foundation waterproofing cost ranges from $103 to $146 per linear foot. Basement sealing cost ranges from $4.90 to $9.70 per square foot. Basement french drain cost ranges from $61 to $73 per linear foot. To get a more accurate cost for your basement waterproofing project, request a quote.

By HomeBlue Team

Updated October 26, 2021 4:45 PM

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How Much Does Basement Waterproofing Cost in Seattle, WA?

This guide is intended to provide you approximate basement waterproofing cost in your area. To get a quote for your specific project, Click Here for a Free Estimate. Our research, which includes feedback provided by waterproofing companies, resulted in the following foundation waterproofing cost in Seattle, WA.

Basement waterproofing cost:

Basement waterproofing cost ranges from $2,400 to $9,700 depending on the type of waterproofing required. This range includes various types of projects including interior projects (installing perimeter drains, french drains, channel drains, drain tiles, or basement sealing) and exterior projects (such as digging a trench around the exterior of your home and sealing the foundation). The costs below attempt to break down these different types of work.

Foundation waterproofing cost:

Exterior foundation waterproofing cost ranges from $103 to $146 per linear foot. This is exterior work that involves digging a trench on the outside of your home and installing waterproofing along the wall and foundation of the structure.

Foundation waterproofing cost based on the number of linear feet installed:

Foundation waterproofing cost (20 linear feet): $2,100 to $2,900.
Foundation waterproofing cost (40 linear feet): $4,100 to $5,800.
Foundation waterproofing cost (60 linear feet): $6,200 to $8,700.
Foundation waterproofing cost (80 linear feet): $8,300 to $11,700.
Foundation waterproofing cost (100 linear feet): $10,300 to $14,600.

Basement french drain cost:

Basement french drain cost ranges from $61 to $73 per linear foot. This is interior work that involves digging a trench or drain on the basement floor that drains into an exterior drain pipe or into a sump pump. These systems are also known as perimeter drains, channel drains, drain tiles, and basement drains.

Basement french drain cost based on the number of linear feet installed:

Basement french drain cost (20 linear feet): $1,200 to $1,500.
Basement french drain cost (40 linear feet): $2,400 to $2,900.
Basement french drain cost (60 linear feet): $3,600 to $4,400.
Basement french drain cost (80 linear feet): $4,900 to $5,800.
Basement french drain cost (100 linear feet): $6,100 to $7,300.

Basement sealing cost:

Basement sealing cost ranges from $4.90 to $9.70 per square foot. This is interior work that involves applying a sealant to the interior wall or floor of your basement. This process involves applying a sealant such as DRYLOK, RedGard, Aquadefense, and various types of liquid rubber products.

Sump pump cost:

If you require a sump pump as part of your basement waterproofing project, check out our Sump Pump Cost Guide for Seattle, WA

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Factors that Influence Foundation Waterproofing Cost in Seattle

When a contractor comes to your house to provide you an estimate, they will consider several factors that can increase or decrease the cost of your project. Pricing for your basement waterproofing project will vary based on the type of work required and whether both interior and exterior work is needed. Here are a few things to keep in mind:

Your prices may be higher when:

Your basement is large and has significant water issues.
Interior and exterior work is required.
A sump pump needs to be installed.
A water drain line needs to be installed.
The basement is difficult to access.
The exterior foundation is difficult to access.
You have a finished basement.
The basement is full of items or furniture.

Your prices may be lower when:

You have minimal water issues.
You have an existing drain line to tie into (for drainage).
You already have a sump pump installed.
The basement is open and can be easily navigated.
Only interior work is required.
Only exterior work is required.
The basement is unfinished.
The basement is empty.

Price(less) Quotes from Local Waterproofing Companies Near Seattle, WA

Technical Waterproofing, Inc. Technical Waterproofing, Inc., has been preserving history and helping build the future since 2001. We specialize in projects of all sizes in the Pacific Northwest. We are experts in the industry and take pride in the work we do.

All Seasons Waterproofing and Drainage, Inc. All Seasons Waterproofing and Drainage, Inc. is a locally owned and operated waterproofing company backed with years of experience solving western Washington’s water problems. All employees are trained by Certified Waterproofing Professionals. Our goal is to provide our customers the best possible, permanent solution to their water problem by using only the best materials available and employing only trained, experienced professionals. Our owner, Kirk Carlson, is a who’s who in Executives and Business; has been selected as “Businessman of the Year,” (twice) has received the “National Leadership Award,” has been Co-Chairman for the Business Advisory Counsel for the State of Washington, was the first dealer of advanced technology with the International Waterproofing Contractors Network in our state and has served on their "Dealership Board" as well.

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