63/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 663 Google reviews, listed on Google as “Septic system service”.
Best Septic Service Companies in City of Sammamish, WA (2026)
146 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in City of Sammamish: Fresh N Clean Septic, CR Score 63/100; 4.9★ from 663 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Zoom Drain of Seattle, posts 24/7 hours; ranked #2 of 146.
- 15
Most-reviewed: Gene Johnson Plumbing, 4,041 Google reviews at 4.8★, the most of 146 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
146 City of Sammamish septic service companies are ranked here by CR Score, from ten published factors. 77 are open 24/7, 116 open Saturdays and 100 open Sundays, based on posted hours. The median Google rating is 4.9★ across 146 rated businesses.
Top 10 septic service companies in City of Sammamish at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Fresh N Clean Septic | 63 | 4.9★ (663) | Woodinville, 11 mi away | 24/7 | Overall |
| 2 | Zoom Drain of Seattle | 62 | 5.0★ (835) | Seattle, 16 mi away | 24/7 | Emergencies |
| 3 | A Advanced Septic & Construction Services | 61 | 4.8★ (2,933) | Auburn, 24 mi away | 24/7 | — |
| 4 | A Wesco Septic Services | 60 | 4.8★ (550) | Snohomish, 17 mi away | 24/7 | — |
| 5 | American Rooter Sewer & Drain Service LLC | 60 | 5.0★ (316) | Bellevue, 5 mi away | 24/7 | — |
| 6 | Washington Rooter Sewer & Drain Service LLC | 60 | 5.0★ (310) | Bellevue, 5 mi away | 24/7 | — |
| 7 | Puget Sound Septic | 60 | 5.0★ (413) | Maple Valley, 15 mi away | Sat · Sun · Evenings | — |
| 8 | 2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air | 58 | 4.9★ (3,532) | Seattle, 17 mi away | Sat · Sun · Evenings | — |
| 9 | A Wesco Septic Services | 58 | 4.7★ (229) | Snohomish, 18 mi away | 24/7 | — |
| 10 | Lighthouse Plumbing | 58 | 5.0★ (268) | City of Sammamish | 24/7 | — |
The 146 best septic service companies in City of Sammamish, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Seattle, 16 mi away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 835 Google reviews, listed on Google as “Septic system service”.
Based in Auburn, 24 mi away
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 2,933 Google reviews, listed on Google as “Septic system service”.
Based in Snohomish, 17 mi away
60/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 550 Google reviews, listed on Google as “Septic system service”.
Based in Bellevue, 5 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 316 Google reviews, listed on Google as “Plumber”.
Based in Bellevue, 5 mi away
60/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 310 Google reviews, listed on Google as “Plumber”.
Based in Maple Valley, 15 mi away
60/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 413 Google reviews, listed on Google as “Septic system service”.
Based in Seattle, 17 mi away
58/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 3,532 Google reviews.
Based in Snohomish, 18 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 229 Google reviews, listed on Google as “Septic system service”.
Based in City of Sammamish
58/100CR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 268 Google reviews.
Based in Camano, 8 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Septic system service”.
#12 Septic Response
Based in Kirkland, 9 mi away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 213 Google reviews, listed on Google as “Plumber”.
Based in Issaquah, 5 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 98 Google reviews, listed on Google as “Plumber”.
#14 Inspection Boss
Based in Everett, 8 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Septic system service”.
Based in Seattle, 16 mi away
57/100CR ScoreRanked #15 because of its Google rating and review volume: 4.8★ from 4,041 Google reviews, the most in City of Sammamish.
Based in Seattle, 15 mi away
57/100CR ScoreRanked #16 because of its Google rating and review volume: 4.8★ from 2,646 Google reviews.
Based in Lynnwood, 19 mi away
57/100CR ScoreRanked #17 because of its Google rating and review volume: 4.9★ from 781 Google reviews.
Based in Everett, 23 mi away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 121 Google reviews, listed on Google as “Septic system service”.
Based in Seattle, 15 mi away
57/100CR ScoreRanked #19 because of its Google rating and review volume: 4.7★ from 716 Google reviews.
Based in Seattle, 14 mi away
57/100CR ScoreRanked #20 because of its Google rating and review volume: 4.8★ from 409 Google reviews.
Based in Seattle, 15 mi away
57/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 218 Google reviews, listed on Google as “Plumber”.
Based in Everett, 10 mi away
57/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 124 Google reviews, listed on Google as “Plumber”.
Based in Kent, 6 mi away
56/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 144 Google reviews, listed on Google as “Septic system service”.
Based in Bellevue, 4 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Plumber”.
Based in Woodinville, 13 mi away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Septic system service”.
Septic service 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 146 ranked septic service companies here; the rest are on their profiles.
Also serving City of Sammamish
20 more septic service companies within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Ace Sewer Line Repair Services | 14 mi | |
| Benson Hill Septic Tank Services | 3.0★ (2) | 24 mi |
| Clearline Sewer Repair | 5.0★ (1) | 16 mi |
| CLS Septics & Electrical | 5.0★ (1) | 17 mi |
| Cole Septic | 5.0★ (1) | 25 mi |
| DELTA ROOTER LLC | 17 mi | |
| Earthwise Excavation | 5.0★ (1) | 15 mi |
| Evergreen Sanitation | 1.0★ (1) | 12 mi |
| Evergreen Sewer | 5.0★ (1) | 18 mi |
| Gravity Sewer Repair | 16 mi | |
| I Need A Plumber Now and Sewer Services | 5.0★ (2) | 10 mi |
| Insight Septic Design | 5.0★ (2) | 12 mi |
| Joe the Pro Plumbing, Septic, Sewer, Heating & Air | 17 mi | |
| Neighbor's Sno-Valley Septic | 14 mi | |
| Northrup Construction Inc | 5.0★ (1) | 20 mi |
| Paulson Septic Design | 16 mi | |
| Pro Flow Plumbing & Sewers | 5.0★ (2) | 22 mi |
| Seattle Septic Pros | 14 mi | |
| Sorrell Septic Design LLC | 5.0★ (2) | 6 mi |
| Wadleigh Water and Sewer | 5.0★ (2) | 10 mi |
How we ranked City of Sammamish septic service companies
We scored 146 City of Sammamish septic service companies on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 3, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In City of Sammamish data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Septic service companies in City of Sammamish: frequently asked questions
Who is the best septic service company in City of Sammamish?
By CR Score, the highest-ranked septic service company in City of Sammamish, WA is Fresh N Clean Septic with a CR Score of 63/100. It has 4.9★ from 663 Google reviews. It is open 24/7. Zoom Drain of Seattle (#2) and A Advanced Septic & Construction Services (#3) follow. We ranked 146 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in City of Sammamish?
ContractorsRanked ranks 146 septic service companies serving City of Sammamish, WA. 1 of them is based in City of Sammamish; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in City of Sammamish are open 24/7?
77 ranked septic service companies in City of Sammamish post 24/7 hours. The highest-ranked are Fresh N Clean Septic (#1), Zoom Drain of Seattle (#2) and A Advanced Septic & Construction Services (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in City of Sammamish work on weekends?
116 of 146 ranked septic service companies post Saturday hours and 100 post Sunday hours. The highest-ranked open Saturdays are Fresh N Clean Septic (#1), Zoom Drain of Seattle (#2) and A Advanced Septic & Construction Services (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do City of Sammamish septic service companies have?
The median Google rating among 146 rated septic service companies in City of Sammamish is 4.9★, with a median of 38 reviews. Gene Johnson Plumbing has the most, 4,041 reviews, and ranks #15. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank septic service companies?
Each septic service company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do septic service companies outside City of Sammamish count in this ranking?
Yes, if they are within 25 mi of the City of Sammamish city center, our service radius for septic service 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.
Can septic service companies pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for City of Sammamish
- November 2026: CR Scores recalculated for 146 septic service companies serving City of Sammamish.
- November 2026: 1 duplicate listing merged.
More septic service companies and City of Sammamish pages
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