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11 Best Foundation Companies in Mercer Island, WA

More than 300 people have received a free quote in the last 60 days.

Last Updated: February 25, 2025

While foundation repair is typically costly and requires significant time, not fixing foundation problems could lead to serious, expensive consequences later on. You may worry that it's already too late, and that your Mercer Island home has sustained significant foundation damage that can't be seen.

To assist homeowners with finding quality foundation services, we researched and assembled a list of top-rated and highly reviewed foundation repair companies near you. Check out our list of top picks to learn about the best foundation repair companies in Mercer Island, Washington.

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.
Top Pick
4.9/5
  • Full-service foundation repair company
  • Expert technicians with strong customer reviews
  • Available in 33 states
Best Warranty Options
4.7/5
  • Offers free in-person and virtual evaluations
  • 87+ years of industry experience
  • All repairs backed by a lifetime transferable warranty

Top 11 Best Foundation Companies in Mercer Island

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Groundworks

Groundworks Logo

Our Rating

User Rating

18915 16th Ave S, SeaTac, WA 98188 (253) 327-1650 groundworks.com

Good customer service

Free quotes

Services Offered

Sump pumps
Repair
Retaining walls
Crawl space encapsulation
Sidewalks
Waterproofing
Inspection
Concrete
Driveways
Mold remediation
Grading and leveling

Wet Basement Services

Wet Basement Services Logo

Our Rating

User Rating

7351 148th Ave NE, Redmond, WA 98052 (425) 877-0845 wetbasementservices.com

Helps educate customers

Good customer service

Transparent pricing

Free quotes

Services Offered

French drains
Waterproofing
Masonry
Repair
Grading and leveling
Crawl space encapsulation
Inspection
Concrete
Retaining walls
Mold remediation
Sump pumps
Sealing

Perma Dry Waterproofing & Drainage

Perma Dry Waterproofing & Drainage Logo

Our Rating

User Rating

608 SW 12th St, Renton, WA 98057 (425) 277-1990 permadrywaterproofing.com

Helps educate customers

Free quotes

Services Offered

Sealing
Waterproofing
Mold remediation
Inspection
Sump pumps
Retaining walls
Repair
Driveways
Grading and leveling
French drains
Concrete
Crawl space encapsulation

R&R Foundation Specialist

R&R Foundation Specialist Logo

Our Rating

User Rating

1611 E Marine View Dr, Everett, WA 98201 (425) 760-5077 rrfoundationspecialist.com

Punctual service

Helps educate customers

Good customer service

Free quotes

Services Offered

Waterproofing
Repair
Inspection
Grading and leveling
Concrete
Crawl space encapsulation
Masonry
Retaining walls

Basement Expert Waterproofing of Seattle

Basement Expert Waterproofing of Seattle Logo

Our Rating

User Rating

20722 12th Ave W, Lynnwood, WA 98036 (206) 388-7867 basement-expert.com

Transparent pricing

Punctual service

Helps educate customers

Free quotes

Good customer service

Services Offered

Sump pumps
Crawl space encapsulation
Inspection
Grading and leveling
Mold remediation
Repair
French drains
Waterproofing

1-866-SLABJACK

1-866-SLABJACK Logo

Our Rating

User Rating

6116 211th St SW Suite 204, Lynnwood, WA 98036 (866) 752-2522 1866slabjack.com

Punctual service

Free quotes

Helps educate customers

Good customer service

Services Offered

Inspection
Repair
Driveways
Concrete
Grading and leveling
Sidewalks
Waterproofing

Seattle Foundation Repair

Seattle Foundation Repair Logo

Our Rating

User Rating

1546 NW 56th St Unit 526, Seattle, WA 98107 (206) 889-6751 seattlefoundationrepairs.com

Good customer service

Transparent pricing

Services Offered

Masonry
Retaining walls
Repair
Grading and leveling
Mold remediation
Inspection
Crawl space encapsulation
Concrete
Waterproofing

Rainy Day Basement Systems

Rainy Day Basement Systems Logo

Our Rating

User Rating

18931 59th Ave NE SUITE 5, Arlington, WA 98223 (360) 435-6992 rainydaybasementsystems.com

Free quotes

Punctual service

Services Offered

Concrete
Crawl space encapsulation
Waterproofing
Mold remediation
Repair
Sump pumps
Inspection

TerraFirma Foundation Systems

TerraFirma Foundation Systems Logo

Our Rating

User Rating

10111 S Tacoma Way # D5, Tacoma, WA 98499 (866) 486-7196 goterrafirma.com

Helps educate customers

Free quotes

Good customer service

Services Offered

Retaining walls
Waterproofing
Crawl space encapsulation
Concrete
Repair
Mold remediation

All Seasons Waterproofing and Drainage, Inc.

All Seasons Waterproofing and Drainage, Inc. Logo

Our Rating

User Rating

8828 206th St SE, Snohomish, WA 98296 (425) 577-6293 allseasonswaterproofing.com

Free quotes

Good customer service

Services Offered

Sump pumps
Crawl space encapsulation
Retaining walls
Waterproofing
Driveways
French drains
Sealing
Mold remediation
Repair

Foundation & Basement Waterproofing Of Seattle

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Our Rating

User Rating

6525 Fauntleroy Wy SW, Seattle, WA 98136 (206) 333-4968 foundationbasement.com

Transparent pricing

Punctual service

Free quotes

Services Offered

Repair
French drains
Crawl space encapsulation
Sump pumps
Masonry
Inspection
Waterproofing
Mold remediation
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on foundation companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How To Choose a Foundation Repair Company

You need a good foundation repair company to accurately evaluate issues and make appropriate repairs. Do thorough research and focus on these factors when selecting the right company.

Experience

Choose a well-established local company with many years, ideally decades, of experience successfully handling all types of foundation repairs. These providers have specialized expertise with the latest materials and methods. Ask how long a company has been serving your area.

Reputation

Reading through online reviews, checking the Better Business Bureau, and asking for local references helps you verify that a provider consistently delivers quality work and a positive customer service experience. Pay attention if you see numerous complaints about poor service or faulty repairs.

Licensing and Insurance

It's important to select a provider that has the right credentials, bonding, and insurance for liability and workers' compensation. In Washington, there are no state-level licensing requirements for contractors, but they must register with the Washington State Department of Labor & Industries. Contractors must be bonded and insured in order to register. Be sure to check with your city or county government to learn about any additional local requirements. There may be additional requirements for contractors to do certain concrete work.

Warranties

Look for a company that provides lengthy transferable warranties for a minimum of a decade, or preferably lifetime guarantees, to back its foundation repairs. This demonstrates faith that its services are top-quality and safeguards you if issues arise in the future.

Questions To Ask Foundation Repair Companies

While researching options for foundation repair providers, get detailed answers to questions such as:

  • What repair method do you recommend for my specific situation and why? Your provider may consider options such as wall anchors, carbon fiber, and steel piers. Asking allows you to compare suggested solutions between companies.
  • Can you provide a complete written project scope and cost estimate? Getting quotes in writing helps shield you from unexpected expenses.
  • How long will the repairs realistically take to complete? Look for providers that provide reasonable estimates.
  • What options do you have for financing? Providers often offer payment plans for larger foundation repairs.
  • What foundation defects did you find during inspection that may be causing the issue? The response should have easy-to-understand explanations and solutions. If a provider offers a vague answer, it may be trying to bill you for unnecessary work.
  • What guarantees do you offer? Reliable companies usually provide labor and materials warranties for at least 10 years.

Carefully evaluating foundation repair companies helps homeowners select the ideal match for their needs. A provider that can answer the questions above is likely one that provides high-quality, durable repairs. Swiftly tackling foundation problems helps prevent further structural damage.

Frequently Asked Questions About Foundation Repair in Mercer Island, WA

There are several signs that your foundation needs repairs. These might include:

  • Visible crumbling or cracks in your foundation
  • Uneven ground-level or basement floors
  • Cracked, buckling, or bowing walls
  • Door frames or window frames that are skewed or tight
  • Cracks in your basement floor
  • Cracks in your driveway

On average, Mercer Island homeowners pay around $3,042 for foundation repair, although the total cost will vary depending on several factors. The fastest way to get an estimate for the cost of your specific project is to ask for quotes from a handful of local foundation repair companies. The total price will be affected by things like the type of the repair(s) and the size of your house.

Types of foundation repair include leak repair, crack repair, stabilization, underpinning, and waterproofing.

For both leak repair and crack repair, a technician will come to your home, perform an inspection, and use various measures to remedy leaks or cracks. The cost of these procedures will vary greatly depending on the size and cause of the problem.

Stabilization helps to fix bowing walls by inserting carbon fiber or steel strips. The cost will depend on the material used and how many strips are required. The cost of underpinning also varies. This process, sometimes referred to as piering or leveling, involves underpinning your foundation with concrete piers to level it; the cost depends on how many piers are used.

If you're looking to waterproof your foundation or basement, we recommend speaking with a waterproofing specialist. This process may include indoor waterproofing, outdoor waterproofing, or both.

One way to protect your foundation is to make sure that it has the right amount of moisture. Mercer Island sees more rain than many places, so be sure that your gutters and landscaping are arranged to prevent too much water from collecting near your foundation. Additionally, be sure to quickly identify and repair any leaking gutters or pipes.

If you have any concerns about your foundation, you can reach out to a structural engineer for an evaluation. This will cost a few hundred dollars, but the engineer's consultation can net you a list of things to be aware of as well as steps you can take to further protect your foundation. Lastly, if you're building a new house, ensure that you have a soil report done. This can provide information regarding how well the soil on your property can support a foundation, and can highlight any potential future problems.

A permit is normally required for foundation repair, but applying for one should not be your responsibility. Your foundation repair provider should put together the permit and all other documents required in Mercer Island, and should be able to provide the documents and/or explain the process if asked.

Foundation repairs can sometimes, foundation repairs can be considered capital improvements if they fit the criteria of an improvement that adds to a home's overall market value, prolongs its life, or adapts it to new uses. In some cases, making capital improvements helps you qualify for tax breaks. (Contact your Washington tax professional for the most accurate information.) Even without these tax breaks, foundation repairs will, in most cases, positively affect your home's value.

While some foundation problems might seem small and not worth the cost to repair, when left untreated, they can lead to much larger and more expensive problems down the road. Foundation issues can also have underlying causes that are not readily apparent until after a professional inspection. It's important to repair these underlying issues as soon as possible. For these reasons, we advise against procrastinating on foundation repairs.

Other Mercer Island, WA Home Services