22 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Chatham: Reliance Heating, Air Conditioning & Plumbing, CR Score 91/100; 4.8★ from 1,442 Google reviews; open 24/7.
Best for emergencies (open 24/7): Windsor Plumbing & Eel, posts 24/7 hours; ranked #2 of 22.
Most-reviewed: Postma Heating and Cooling, 1,480 Google reviews at 4.9★, the most of 22 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
22 Chatham plumbers are ranked here by CR Score, from 8 published factors. 7 are open 24/7, 11 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.8★ across 22 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 91 | 4.8★ (1,442) | Chatham | 24/7 | Overall |
| 2 | Windsor Plumbing & Eel | 89 | 5.0★ (487) | Amherstburg, 28 km away | 24/7 | Emergencies |
| 3 | Plumb Tech | 89 | 4.4★ (234) | Chatham | 24/7 | — |
| 4 | Royal Flush Plumbing Service | 87 | 4.5★ (71) | Chatham | 24/7 | — |
| 5 | Superior Plumbing & Heating of Chatham | 87 | 4.9★ (84) | Chatham | 24/7 | — |
| 6 | Postma Heating and Cooling | 86 | 4.9★ (1,480) | Chatham | Sat · Sun · Evenings | Most reviews |
| 7 | Willie G's Master Plumber Services | 85 | 4.6★ (52) | Chatham | 24/7 | — |
| 8 | JP Carey Sewer and Drain Cleaning | 84 | 4.7★ (23) | Chatham | — | — |
| 9 | PLUNGE IT | 83 | 4.8★ (32) | Windsor, 27 km away | 24/7 | — |
| 10 | Evolved Plumbing & Mechanical | 81 | 4.9★ (75) | Chatham | Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.8★ from 1,442 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Amherstburg, 28 km away
Ranked #2 because of its Google rating and availability: 5.0★ from 487 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #3 because of its Google rating and availability: 4.4★ from 234 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #4 because of its Google rating and availability: 4.5★ from 71 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #5 because of its Google rating and availability: 4.9★ from 84 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #6 because of its Google rating and review volume: 4.9★ from 1,480 Google reviews, the most Google reviews on this list (1,480).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #7 because of its Google rating and trade focus: 4.6★ from 52 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #8 because of its Google rating and trade focus: 4.7★ from 23 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Windsor, 27 km away
Ranked #9 because of its Google rating and availability: 4.8★ from 32 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #10 because of its Google rating and trade focus: 4.9★ from 75 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #11 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Chatham
Ranked #12 because of its Google rating and trade focus: 4.3★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Chatham
Ranked #13 because of its Google rating and availability: 4.6★ from 51 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Windsor, 30 km away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #15 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #16 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #17 because of its Google rating and trade focus: 4.9★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #18 because of its Google rating and trade focus: 4.4★ from 14 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #19 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Chatham
Ranked #20 because of its Google rating and availability: 5.0★ from 5 Google reviews, open Saturdays until 6 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Elk River, 27 km away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Essex, 26 km away
Ranked #22 because of its Google rating and review volume: 4.6★ from 79 Google reviews, 79 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
6 more plumbers within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| AAA PLUMBING AND DRAIN | 5.0★ (1) | 39 km |
| Harper Plumbing and Heating | 5.0★ (1) | In Chatham |
| Pro Desk at RONA | In Chatham | |
| Royal Flush Plumbing Service | 29 km | |
| Superior HVAC Service, Heating & Air Conditioning | 5.0★ (55) | In Chatham |
| Tommy's Plumbing LLC | 37 km |
US national ranges converted to CAD, not adjusted for Chatham. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | CA$1,240 | CA$1,890 | CA$2,570 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 22 Chatham plumbers 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.
| Factor | Weight | Computed from | In Chatham data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |