5 Best Basement Renovation Contractors in Seattle (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified August 2026 · 8 min read

Seattle's rain does not care how nice your finished basement looks if the foundation underneath it is letting water in. The basement renovation contractors in Seattle below have logged 273 Google reviews between them, and every one holds at least a 4.8 rating, which tells you these are specialists reviewers trust with the structural work most homeowners never see once it's covered up.

Short answer: Embassy Masonry and Foundation Repairs tops Seattle basement and foundation work with a perfect 5.0 across 61 Google reviews, followed closely by Expert Masonry and Foundation Repairs (4.9, 64 reviews, the deepest review base here) and Wet Basement Services (4.8, 57 reviews, a lifetime transferable warranty). Expect the first step with any of them to be a paid or free inspection to find the actual source of the leak before any repair price is quoted.

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1. Embassy Masonry And Fo…
2. Expert Masonry and Fou…
3. Wet Basement Services
4. Renova Contractors LLC
5. Seattle Elite masonry…
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Seattle Basement & Foundation Specialists Compared

#	Business	Rating	Reviews	Best for
1	Embassy Masonry And Foundation Repairs	5.0 ★	61	Foundation cracks found during drainage work	View ›
2	Expert Masonry and Foundation Repairs	4.9 ★	64	Fast diagnosis and excavation	View ›
3	Wet Basement Services	4.8 ★	57	Mold remediation plus waterproofing	View ›
4	Renova Contractors LLC	4.8 ★	51	Basement work bundled into a bigger renovation	View ›
5	Seattle Elite masonry and foundation repair	5.0 ★	40	Straightforward basement wall waterproofing	View ›

5 Best Basement Renovation Contractors in Seattle (2026)

Our top picks, reviewed

#1 Overall🕑 Open 7 days↩ Responds to reviews

Embassy Masonry And Foundation Repairs

5.061 Google reviews

Embassy Masonry and Foundation Repairs is a Seattle company specializing in structural masonry, foundation repair and waterproofing, including chimney repair and exterior concrete work alongside basement-specific jobs. Reviewers describe calling for one job, drainage installation or brickwork repointing, and having the crew discover and fix a foundation crack in the same visit. Its own site frames the work as long-term structural protection rather than a quick patch.

What people praise

Reviewers describe thorough diagnosis that catches foundation issues beyond the original call
Crews described as showing up on schedule and cleaning up after themselves
Handles both the water intrusion fix and any masonry or brick repair in one visit
Perfect rating across every review on file

Worth knowing

Newest reviews on this page are several months old, so ask about current scheduling

Reputation scorecardrank in Seattle

Rating5 / 5

Review volume61 · 93th

Confidenceearly

Recency6 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: The most consistently perfect rating on this page, and reviewers specifically describe catching foundation cracks that weren't the original reason for the call, a good sign for anyone unsure what's actually wrong.

Website +1206-608-5557 Directions

1700 7th Ave, Seattle, WA 98101

#2🕑 Open 7 days

Expert Masonry and Foundation Repairs

4.964 Google reviews

Expert Masonry and Foundation Repairs handles foundation settling, cracks and water intrusion into basements, working across chimney, concrete and drainage-related structural issues. Reviewers describe the company sending someone, often named James, to inspect the same day a call comes in, being upfront that the actual cause won't be known until excavation starts, and then completing the dig and repair within a few days. One reviewer specifically credits the crew for tracing a basement leak to a fireplace-adjacent foundation issue rather than guessing.

What people praise

Same-day inspection response, per multiple reviewers
Honest about needing to excavate before diagnosing the exact cause
Named technician (James) gets repeat praise for clear explanations
Highest review volume of any specialist on this page

Worth knowing

Listing is unclaimed on Google and has no listed website, so confirm current contact details by phone

Reputation scorecardrank in Seattle

Rating4.9 / 5

Review volume64 · 98th

Confidenceearly

Recency5 months ago

Info completenessphone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: The deepest review base here and reviewers consistently describe fast, honest diagnosis before any excavation begins, though the unclaimed listing means it's worth double-checking the number is current.

+1224-421-0617 Directions

221 1st Ave W, Seattle, WA 98119

#3🕑 Open 5 days/wk↩ Responds to reviews

Wet Basement Services

4.857 Google reviews

Wet Basement Services focuses specifically on basement leak repair, waterproofing and mold remediation, backed by a lifetime transferable warranty that reviewers mention repeatedly. Its own site walks homeowners through risk factors for water intrusion (home age, hillside lots, neighboring construction) before any sales pitch. Reviewers describe the company fixing basement flooding caused by a previous contractor's work and clearing mold that had already taken hold, not just stopping the water.

What people praise

Lifetime transferable warranty specifically called out by multiple reviewers
Handles mold remediation alongside the waterproofing fix, not just the leak
Photo updates provided at each stage of the project
Reviewers describe fair pricing after comparing multiple quotes

Worth knowing

A small number of lower ratings appear in its distribution, though the large majority are five-star
Based in Redmond rather than Seattle proper, confirm response time for your address

Reputation scorecardrank in Seattle

Rating4.8 / 5

Review volume57 · 88th

Confidenceearly

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown93% 5-star

✓ VerifiedSource: Google

Our take: The strongest pick when mold is part of the problem, not just water, and the lifetime warranty is a real differentiator reviewers bring up unprompted.

Website +1425-877-0845 Directions

7351 148th Ave NE, Redmond, WA 98052

#4🕑 Open 7 days↩ Responds to reviews

Renova Contractors LLC

4.851 Google reviews

Renova Contractors LLC is a general contractor whose reviews describe basement and water-damage restoration work handled alongside broader renovation projects, including one job that combined water damage restoration with a kitchen remodel and a shed-to-studio conversion. It isn't a dedicated waterproofing specialist the way the other names on this list are, but reviewers describe the team coordinating directly with insurance adjusters on restoration claims. Project managers Oleg and Nick are named repeatedly for staying on top of scope and scheduling.

What people praise

Comfortable managing insurance-claim coordination on restoration jobs
Handles basement restoration as part of a larger renovation without extra subcontractors
Named project managers get consistent praise for communication
Reasonable pricing per multiple reviewers

Worth knowing

Not a dedicated waterproofing or foundation specialist, so ask specifically about basement moisture experience
One reviewer flagged attention-to-detail issues on a different, unrelated large paint job

Reputation scorecardrank in Seattle

Rating4.8 / 5

Review volume51 · 83th

Confidenceearly

Recency4 weeks ago

Info completenesssite · phone · hours

Rating breakdown90% 5-star

✓ VerifiedSource: Google

Our take: Worth a call if the basement issue is part of a larger renovation or insurance claim, but the specialists above have deeper, more basement-specific review evidence.

Website +1206-255-2708 Directions

221 1st Ave W #247, Seattle, WA 98119

#5🕑 Open 7 days↩ Responds to reviews

Seattle Elite masonry and foundation repair

5.040 Google reviews

Seattle Elite Masonry and Foundation Repair is a waterproofing specialist working on basement walls and foundations, with reviewers describing jobs completed in as little as two days from a leaking basement to a fixed one. Its reviews are shorter and more transactional than some competitors, but consistently describe the same outcome: a crew that shows up, waterproofs the affected wall or foundation section, and resolves the leak.

What people praise

Reviewers describe turnaround as fast as two days for a basement wall leak
Perfect rating across every review on file
Multiple reviewers specifically mention professionalism and politeness on-site
Straightforward scope: waterproofing and foundation inspection, not a wide mix of trades

Worth knowing

Fewest total reviews of the specialists on this page, so the track record is thinner
Reviews are short and don't detail project complexity or pricing

Reputation scorecardrank in Seattle

Rating5 / 5

Review volume40 · 75th

Confidenceearly

Recency7 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: A solid option for a contained, straightforward basement wall waterproofing job, though the shorter review base means less evidence on how it handles a more complicated foundation problem.

Website +1206-591-1717 Directions

221 1st Ave W #200, Seattle, WA 98119

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How we score them

Every number on this page is pulled from public Google data as of the date shown, not from opinion or payment. Rating is the business’s live Google star average. Review volume is how many customers have rated them, measured against other Seattle basement and foundation specialists. Confidence weighs the rating by that volume, so a 5.0 built on dozens of reviews carries more weight than the same score from a handful. Recency reflects how recently customers are still reviewing them. No business can pay to change these numbers.

How much does basement waterproofing cost in Seattle? (2026)

Basement waterproofing and foundation repair pricing depends heavily on the actual cause: a single crack repair, a full exterior excavation and membrane, or a drainage and sump-pump system are very different jobs. Most of the specialists above start with an inspection to find the real source of the leak before quoting anything, since guessing at the cause is how homeowners end up paying twice. Get a written scope and a fixed price for the diagnosed fix, not just a per-linear-foot estimate.

Serving all of Seattle

The basement and foundation specialists above cover Seattle proper and the surrounding metro, including Shoreline, Ballard, Queen Anne, Bellevue and Redmond. Searching for basement waterproofing near me? Every listing below shows a live phone number and address so you can reach the closest option fast.

What to ask before you hire a basement waterproofing contractor

Are you licensed, bonded and insured to work in Washington? (Ask for the license number.)
Will you diagnose the actual cause before quoting a fix, and does the inspection cost anything?
Do you warranty the work, and is that warranty transferable if we sell the house?
Is this an interior fix (sump pump, drain tile) or exterior excavation and membrane?
If mold is present, do you handle remediation yourselves or subcontract it?
How soon can you start if this is an active leak?

Frequently asked questions

How did you choose these basement and foundation contractors?

We started from basement renovation and waterproofing contractors in Seattle with a public Google presence, then ranked by rating, review volume, consistency and recency. See How we score them above.

Are these rankings paid?

No. Rankings come from the public Google data in the scorecard. A business can pay to be a Featured Partner, which adds a badge and top placement, but that never changes another business’s score or position on the underlying data.

How often is this updated?

The data carries a verified date (August 2026 on this page). We refresh listings periodically so ratings and review counts stay current.

Why does Seattle have so many basement waterproofing specialists?

Older homes, hillside lots, heavy seasonal rain and nearby construction that changes grading around a property all raise the risk of water intrusion, which is why this is treated as its own specialty rather than folded into general remodeling.

Is a wet basement always a foundation problem?

Not always. It can be drainage, grading, gutters, or a cracked foundation wall. That’s why most of the contractors above start with an inspection rather than quoting blind.

The bottom line

Embassy Masonry and Foundation Repairs and Expert Masonry and Foundation Repairs are the safest defaults given their perfect-to-near-perfect ratings and thorough diagnostic approach, while Wet Basement Services stands out if mold is already part of the problem. Whichever you call, insist on a real inspection before you accept a price.

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