Verified Floodproofing / drainage SeaTac, WA · Pacific Northwest

Groundworks Seattle (formerly Matvey Foundation Repair and Rainy Day Basement Systems)

Permit and municipal-list evidence corroborates active regional work under the Matvey/Groundworks names.

Who runs it

  • Michelle Short Division Manager shown by BBB

Credentials & verification

State license
MATVEFR837K5, unverified, re-check with board
BBB
A+, accredited
Years in business
27

Services

  • basement waterproofing
  • crawl space moisture control and encapsulation
  • sump pump installation
  • foundation repair and support
  • concrete lifting
  • retaining wall and slope stabilization

Service area

Seattle metro, WA · Tacoma/Puyallup, WA · Snohomish County, WA · Skagit County, WA · Western Washington

Our verification notes

Brand consolidation creates contracting-entity ambiguity: Groundworks says Matvey joined it in 2024, while BBB also treats Rainy Day Basement Systems as a Groundworks alternate name. The captured WA number appeared on a 2023 county permit; verify the exact current L&I entity/registration on the proposal. Concrete lifting is not whole-house flood elevation.

Sources checked

  • BBB Groundworks/Matvey business profile
  • City of Bremerton May 2025 permit report naming Matvey Foundation Repair
  • City of Anacortes 2026 stormwater-maintenance company list naming Groundworks

Last verified 2026-07-16. This is an independent listing, not an endorsement, and we are not affiliated with Groundworks Seattle (formerly Matvey Foundation Repair and Rainy Day Basement Systems). Confirm the current license, insurance and references directly before signing any contract.

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