Find trusted waterproofing professionals serving Washington. All contractors are independently researched and certified.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
"Groundworks is a local company with over 25 years of experience dedicated to fixing foundations, basements, crawl spaces, and concrete. Whether you have bowing or cracked walls, a moldy crawl space, moisture in your basement, or uneven concrete, Groundworks has solutions. Repair and protect your greatest asset today!"
Real homeowners looking for waterproofing in your area
"Remove a sock that slipped into the lint shoot of the clothes dryer. Concerned it may catch on fire if dryer is operated..."
"I had some issues with them, but the quality of the work they did was outstanding!"
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Every Best Pick company in Washington is independently researched and certified annually. We analyze thousands of customer reviews, verify licensing and insurance, and confirm each company meets our strict qualification standards.
We conduct extensive satisfaction surveys and analyze thousands of customer experiences annually.
Verified by
Independent Research
Companies earn Best Pick certification through performance alone. Only businesses with 80%+ recommendation rates qualify.
Best Pick status isn't permanent. Every certified company must re-qualify annually.
Licensed
Insured
Verified
We stand behind our certified companies with a financial guarantee up to $2,500.
Protected
Financial guarantee included
Only waterproofing companies that meet our strict standards earn Best Pick status.
Waterproofing companies must maintain a 4.0+ rating and an 80% recommendation rate.
Current state contractor license verification and general liability insurance for waterproofing work
Minimum 1 year in business with established local presence
Maintain active business registration and in good standing with the state
Consistent waterproofing service quality across all projects
Must re-qualify every year through new research
Common questions about Certified Best Pick® waterproofing companies in Washington
Best Pick Certified Waterproofing companies in Seattle, WA have earned their status through independent consumer research—not paid placement. To qualify, a company must meet strict standards:
Certification is re-verified annually, ensuring continued performance.
No. Waterproofing companies cannot buy Best Pick Certification, improved ratings, or better placement. Our research team independently evaluates companies based on customer satisfaction, licensing, insurance, and business stability—before any business relationship exists.
Companies that earn certification pay a participation fee after qualifying, which covers the cost of ongoing research and publication. This fee has no influence on whether a company qualifies or how they appear in our directory.
The Best Pick Guarantee provides financial protection—up to $2,500 in labor costs—if a Certified Best Pick Waterproofing company fails to deliver on their commitments.
To be eligible:
This guarantee applies only to Certified Best Pick companies, not Standard Pros. Full terms are available on our guarantee page.
