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ContractorsRanked

Best Foundation Repair Companies in Seattle, WA (2026)

135 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Seattle: Expert Masonry and Foundation Repairs, CR Score 91/100; 5.0★ from 62 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Seattle Elite masonry and foundation repair, posts 24/7 hours; ranked #2 of 135.

  3. 8

    Most-reviewed: Valentine Roofing, 1,359 Google reviews at 4.8★, the most of 135 ranked; ranked #8.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

135 Seattle foundation repair companies are ranked here by CR Score, from 8 published factors. 27 are open 24/7, 81 open Saturdays and 53 open Sundays, based on posted hours. The median Google rating is 5.0★ across 135 rated businesses.

Top 10 foundation repair companies in Seattle at a glance

Top 10 foundation repair companies in Seattle at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Expert Masonry and Foundation Repairs915.0★ (62)Seattle24/7Overall
2Seattle Elite masonry and foundation repair905.0★ (40)Seattle24/7Emergencies
3KG Basement Waterproofing Seattle905.0★ (34)Seattle24/7—
4Swift Masonry And Foundation Repair895.0★ (49)Bellevue, 8 mi away24/7—
5WA Masonry & Waterproofing LLC885.0★ (18)Seattle24/7—
6Seattle quality Waterproofing and foundation repair885.0★ (30)Bellevue, 7 mi away24/7—
7Embassy Masonry And Foundation Repairs885.0★ (60)SeattleSat · Sun · Evenings—
8Valentine Roofing874.8★ (1,359)Tukwila, 11 mi away24/7Most reviews
9Seattle advanced waterproofing & foundation repairs875.0★ (41)Bainbridge Island, 1 mi away24/7—
10NW Foundation & Basement865.0★ (14)Seattle24/7—

The 135 best foundation repair companies in Seattle, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  8. #8 Valentine Roofing

    Based in Tukwila, 11 mi away

    87/100CR Score

    Ranked #8 because of its Google rating and review volume: 4.8★ from 1,359 Google reviews, the most Google reviews on this list (1,359).

    • 4.8★ from 1,359 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    400 Industry Dr Suite 130, Tukwila, WA 98188
    View profile for Valentine Roofing(206) 558-0611

  12. #12 Sump Pump Wizards

    Based in Bonney Lake, 7 mi away

    85/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.8★ from 58 Google reviews, listed on Google as “Waterproofing service”.

    • 4.8★ from 58 Google reviews
    Hours
    Mon–Sat 8 AM–7:30 PM · Sun 10 AM–7 PM
    View profile for Sump Pump Wizards(253) 297-2221

  24. #24 Insulation Co

    Based in Seattle

    81/100CR Score

    Ranked #24 because of its Google rating and review volume: 5.0★ from 256 Google reviews, 256 Google reviews.

    • 5.0★ from 256 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat 8 AM–3 PM · Sun closed
    Address
    1420 E Pine St, Seattle, WA 98122
    View profile for Insulation Co(206) 497-7358

Foundation repair companies ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 135 ranked foundation repair companies here; the rest are on their profiles.

foundation repair companies in Seattle, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Nice View Waterproofing & Construction, LLC804.6★ (22)24 mi
27North OG Roofing804.9★ (39)18 mi
28Washington Roofing Services804.9★ (205)38 mi
29Triton Roofing & Commercial Waterproofing LLC805.0★ (5)13 mi
30Oscar's Waterproofing Vinyl Deck805.0★ (20)14 mi
31Silverlining Roof LLC795.0★ (351)12 mi
32Seattle Foundation Repair794.1★ (85)In Seattle
33The Bricks Doctor LLC (Masonry Specialist)795.0★ (27)3 mi
34All Seattle Masonry and Foundation Repair795.0★ (31)In Seattle
35Basement Expert Waterproofing of Seattle785.0★ (14)15 mi
36Ultra Quality Construction LLC784.9★ (71)16 mi
37Waterproof Roofing and Construction Llc785.0★ (9)10 mi
38Queen City Basement & Foundation Repairs784.1★ (9)6 mi
39iCoat-it785.0★ (5)22 mi
40Wet Basement Services774.8★ (54)10 mi
41Ram Jack West774.7★ (101)13 mi
42Capitol Duct Cleaning775.0★ (814)35 mi
43A+ General Contracting & Handyman Services774.2★ (5)10 mi
44Groundworks774.9★ (268)40 mi
45Supreme Home Improvements LLC775.0★ (9)22 mi
46Kirkland Construction and Paving LLC775.0★ (17)10 mi
47Seattle Core Masonry & Construction775.0★ (10)4 mi
48AK Construction764.8★ (26)14 mi
49Concrete Fix LLC765.0★ (11)7 mi
50J&K Foundations765.0★ (7)31 mi

Also serving Seattle

20 more foundation repair companies within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked foundation repair companies serving Seattle
BusinessGoogle ratingDistance
AFFIX SEISMIC RETROFIT5.0★ (40)In Seattle
CELESTIAL CONSTRUCTION4.9★ (30)In Seattle
Cherry Design + Build5.0★ (10)In Seattle
Compton Builders | Asphalt Paving | Roofing Company4.7★ (30)In Seattle
Evergreen Seismic Seattle5.0★ (39)In Seattle
Filco Company, INC.4.9★ (21)In Seattle
First Response Water Damage Repair4.8★ (44)In Seattle
Flip House Handyman - Home Repair and Remodel LLC5.0★ (23)In Seattle
Fuller Living Construction5.0★ (50)In Seattle
Iconiq Construction4.9★ (68)In Seattle
Johnson Brothers Construction4.5★ (10)In Seattle
Local Seattle Masonry & Construction5.0★ (49)In Seattle
Lunexa Restoration5.0★ (22)In Seattle
Mickey "the Maintenance Man" LLC5.0★ (11)In Seattle
MTC Handyman Service4.8★ (18)In Seattle
Puzzle Construction Group4.9★ (38)In Seattle
Renova Contractors LLC4.8★ (38)In Seattle
Seattle House Remodeling LLC4.8★ (17)In Seattle
Sound Seismic Earthquake Retrofitting4.9★ (98)In Seattle
Turner Construction Company3.8★ (18)In Seattle

How much do foundation repair companies cost in Seattle?

National price ranges in USD, not adjusted for Seattle. Each row names its basis and the month we checked it.

How much do foundation repair companies cost in Seattle?
JobLowTypicalHighBasisChecked
Foundation repair$2,225$5,174$8,133Per project: typical range of customer-reported repairs. US national rangeOctober 2026

How we ranked Seattle foundation repair companies

We scored 135 Seattle foundation repair companies on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Seattle data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Foundation repair companies in Seattle: frequently asked questions

Who is the best foundation repair company in Seattle?

By CR Score, the highest-ranked foundation repair company in Seattle, WA is Expert Masonry and Foundation Repairs with a CR Score of 91/100. It has 5.0★ from 62 Google reviews. It is open 24/7. Seattle Elite masonry and foundation repair (#2) and KG Basement Waterproofing Seattle (#3) follow. We ranked 135 foundation repair companies on 8 factors, last updated October 22, 2026.

How many foundation repair companies are there in Seattle?

ContractorsRanked ranks 135 foundation repair companies serving Seattle, WA. 12 of them are based in Seattle; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.

Which foundation repair companies in Seattle are open 24/7?

27 ranked foundation repair companies in Seattle post 24/7 hours. The highest-ranked are Expert Masonry and Foundation Repairs (#1), Seattle Elite masonry and foundation repair (#2) and KG Basement Waterproofing Seattle (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Seattle work on weekends?

81 of 135 ranked foundation repair companies post Saturday hours and 53 post Sunday hours. The highest-ranked open Saturdays are Expert Masonry and Foundation Repairs (#1), Seattle Elite masonry and foundation repair (#2) and KG Basement Waterproofing Seattle (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Seattle?

Foundation repair typically costs $2,225 to $8,133, with $5,174 typical (Per project: typical range of customer-reported repairs. US national range). This is a national range, not adjusted for Seattle. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Seattle foundation repair companies have?

The median Google rating among 135 rated foundation repair companies in Seattle is 5.0★, with a median of 20 reviews. Valentine Roofing has the most, 1,359 reviews, and ranks #8. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank foundation repair companies?

Each foundation repair company gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do foundation repair companies outside Seattle count in this ranking?

Yes, if they are within 40 mi of the Seattle city center, our service radius for foundation repair companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Update log for Seattle

  1. October 2026: CR Scores recalculated for 135 foundation repair companies serving Seattle.

More foundation repair companies and Seattle pages

Other trades in Seattle