Seattle's wet climate makes waterproofing essential for homeowners. Our rankings highlight the best contractors in a competitive market.
MHMaya Hendricks · Home Services Editor Updated June 13, 2026 · Next review July 2026
Editorially independent7 companies evaluated
cover story
★ Editor's ChoiceAll Seasons Waterproofing and Drainage, Inc.
96Score
Latest update · June 13, 2026: Initial ranking published. 7 Seattle-metro waterproofing businesses evaluated, top 7 ranked by Vetted Score.
Seattle's unique climate creates a pressing need for effective waterproofing solutions. With heavy rains and a high water table, homeowners must ensure their basements and foundations remain dry and secure. This market is competitive, with seven waterproofing contractors evaluated, each vying for your trust.
Our rankings are based on a combination of customer ratings and reviews, focusing on local performance. We evaluated the businesses on their Vetted Scores, which reflect customer satisfaction and reliability in addressing Seattle's specific waterproofing challenges.
7waterproofing contractors evaluated in Seattle
4.94average rating across the field
312customer reviews analyzed
Cityvetted analysis of public Google review data, updated June 13, 2026.
We assessed the waterproofing contractors in Seattle through a thorough review of their customer feedback, focusing on star ratings and the number of reviews. Each business was evaluated based on its ability to deliver quality service in the local context, ensuring that our rankings reflect the most reliable options available.
No business has paid for placement in our rankings. We refresh our evaluations monthly to keep the information current, providing you with an unbiased overview of the best waterproofing contractors in Seattle.
The Vetted Score: six weighted factors
Customer sentiment25%
Rating quality20%
Review volume & velocity20%
Website trust signals15%
Service breadth10%
Business longevity10%
Sentiment is measured by AI analysis of review text, recency-weighted, with verified-pattern checks to discount suspicious review bursts.
With a stellar rating of 4.8 from 195 reviews, All Seasons Waterproofing and Drainage, Inc. is highly regarded for its thorough work and responsive customer service. Reviewers appreciate the team's attention to detail and effectiveness in solving waterproofing issues. However, some have noted occasional scheduling delays. This company excels in comprehensive waterproofing solutions and is ideal for homeowners needing reliable service.
Pros
Thorough work
Responsive customer service
Experienced team
Cons
Occasional scheduling delays
Higher pricing than some competitors
Best forHomeowners needing reliable waterproofing solutions
Wet Basement Services also holds a 4.8 rating, but with 58 reviews. Customers commend their affordability and efficient service. They are particularly noted for their expertise in basement waterproofing. However, the lower review count compared to the top pick may raise some concerns about consistency. This company is suitable for budget-conscious homeowners seeking effective solutions.
Seattle Secure Waterproofing & Foundation has a perfect rating of 5 from 31 reviews. Clients appreciate their specialized knowledge in handling waterproofing for new constructions. They are praised for their professionalism and quality work. However, their limited number of reviews may suggest they are still emerging in the market. This company is ideal for builders and homeowners involved in new projects.
With a 5-star rating from 18 reviews, Basement Expert Waterproofing of Seattle is praised for its knowledgeable staff and effective solutions. Customers highlight the thorough assessments conducted before work begins. However, the limited review base may leave some potential clients hesitant. This company is a good option for those seeking personalized service.
City Basement Waterproofing & Foundation has a perfect rating of 5 based on 6 reviews. Customers appreciate their promptness and attention to detail. However, the small number of reviews may indicate limited experience in the market. This company is suitable for clients looking for quick service, but be cautious about their track record.
Pros
Prompt service
Attention to detail
Cons
Small number of reviews
Limited service history
Best forClients needing quick waterproofing solutions
Rainier Foundation & Waterproofing has a perfect rating of 5 from just 3 reviews. While clients praise their work, the very limited review count raises concerns about reliability and consistency. This company might be a gamble for those needing extensive waterproofing solutions, as they are still establishing their reputation in the area.
Pros
Positive feedback from clients
Good quality work
Cons
Very limited review base
Unproven in the market
Best forClients willing to take a chance on a new provider
Seattle Waterproofing and Masonry has a perfect rating of 5 but only 1 review. While this single review is positive, the lack of additional feedback makes it tough to gauge their overall service quality. This company may be suitable for small projects, but their unproven status in the market warrants caution.
Pros
Positive review
Potential for good service
Cons
Only one review
Unproven in the market
Best forSmall projects requiring waterproofing
Service areaSeattle
Typical pricing$800 to $3,000
Before you book
How to choose a waterproofing contractor in Seattle
Selecting a waterproofing contractor in Seattle requires careful consideration of local factors. Here are key points to guide your decision.
Check for State Licensing
Ensure the contractor is licensed in Washington State. This guarantees they meet local regulations and standards.
Evaluate Response Times
Look for contractors who can respond quickly, especially during the rainy season when issues can escalate rapidly.
Consider Service Area
Choose a contractor familiar with your neighborhood. Local expertise can make a significant difference in service quality.
What it costs
What waterproofing costs in Seattle
The cost of waterproofing services in Seattle can vary widely based on the extent of the work required. Here’s a breakdown of typical pricing tiers.
Basic Waterproofing$1,000 to $3,000 for minor repairs and sealing.
Full Basement Waterproofing$3,000 to $7,000 for extensive work including drainage systems.
Foundation Repair$7,000 to $15,000 for significant structural issues.
Emergency Services$500 to $2,000 for urgent repairs during severe weather.
Frequently asked questions
How much does waterproofing cost in Seattle?
Prices for waterproofing services in Seattle typically range from $2,000 to $7,000, depending on the extent of the work needed.
What should I look for in a waterproofing contractor?
Look for contractors with strong ratings and a solid number of reviews. In Seattle, consider those with at least 50 reviews for better reliability.
How often is this ranking updated?
We re-run the full analysis monthly with fresh review data. Last updated June 13, 2026.
Our verdict
For most Seattle homeowners: <strong>All Seasons Waterproofing and Drainage, Inc.</strong>
If you need reliable waterproofing and have a larger project, All Seasons Waterproofing and Drainage, Inc. is your best bet with a solid 4.8 rating from 195 reviews. For smaller jobs or specific basement issues, Wet Basement Services holds a strong 4.8 rating as well and has a focused approach. Lastly, if you want to support a promising new player, consider Seattle secure waterproofing & foundation, which has a perfect rating on a smaller scale.
Cityvetted
