64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 373 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Pool Builders in Oshawa, ON (2026)
234 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Oshawa: WEST COVE POOLS, CR Score 64/100; 4.9★ from 373 Google reviews; open Saturdays until 3 PM.
- 2
Best for emergencies (open 24/7): Bloom Field Pools, posts 24/7 hours; ranked #2 of 234.
- 27
Most-reviewed: The Hot Tub People, 501 Google reviews at 4.1★, the most of 234 ranked; ranked #27.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
234 Oshawa pool builders are ranked here by CR Score, from ten published factors. 18 are open 24/7, 145 open Saturdays and 69 open Sundays, based on posted hours. The median Google rating is 4.8★ across 234 rated businesses.
Top 10 pool builders in Oshawa at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | WEST COVE POOLS | 64 | 4.9★ (373) | Oshawa | Sat | Overall |
| 2 | Bloom Field Pools | 62 | 4.6★ (64) | Oshawa | 24/7 | Emergencies |
| 3 | Tav Pools and Water Kingdom | 62 | 4.8★ (190) | Oshawa | Sat | — |
| 4 | International Pool & Spa Centers | 62 | 4.2★ (407) | Oshawa | Sat · Sun | — |
| 5 | Colonial Pools & Recreation | 60 | 4.6★ (105) | Ajax, 16 km away | Sat · Sun | — |
| 6 | Diver Dave Pool Leak Detection | 59 | 4.9★ (171) | Milton, 37 km away | — | — |
| 7 | Avoca Pools | 59 | 4.5★ (36) | Oshawa | Sat · Sun · Evenings | — |
| 8 | Lazzaro Gas HVAC | 59 | 5.0★ (140) | Ajax, 6 km away | 24/7 | — |
| 9 | Taunton Pools | 59 | 4.1★ (274) | Oshawa | Sat | — |
| 10 | Thursty Pools Inc. | 59 | 4.1★ (69) | Oshawa | Sat · Sun | — |
The 234 best pool builders in Oshawa, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Oshawa
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.6★ from 64 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa
62/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 190 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa
62/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.2★ from 407 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ajax, 16 km away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.6★ from 105 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milton, 37 km away
59/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 171 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#7 Avoca Pools
Based in Oshawa
59/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.5★ from 36 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ajax, 6 km away
59/100CR ScoreRanked #8 because of its Google rating and review volume: 5.0★ from 140 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa
59/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.1★ from 274 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa
59/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.1★ from 69 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond Hill, 49 km away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 95 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pickering, 23 km away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 172 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vaughan, 49 km away
58/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 181 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa
58/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#15 Pinnacle Pool
Based in Ajax, 13 km away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 83 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Peterborough, 53 km away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 56 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#17 MCG POOLS
Based in Oshawa
57/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#18 Nebo's Pools
Based in Pickering, 21 km away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Markham, 35 km away
57/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.3★ from 120 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Scarborough, 33 km away
57/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 77 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Toronto, 8 km away
57/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 22 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Ajax, 16 km away
57/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.3★ from 61 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Ajax, 17 km away
57/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.2★ from 34 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Scarborough, 32 km away
57/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.6★ from 140 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#25 Blue Planet Pool
Based in Richmond Hill, 47 km away
57/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 62 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Pool builders 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 234 ranked pool builders here; the rest are on their profiles.
Also serving Oshawa
20 more pool builders within 64 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 |
|---|---|---|
| A+ Gunite Pool & Spa Inc. | 5.0★ (2) | 53 km |
| Bennett Pools | 5.0★ (2) | 33 km |
| Certified Paving & Construction | 5.0★ (1) | 51 km |
| Clear The Way Landscaping Inc | 1.0★ (2) | 58 km |
| Giancola Pools | 5.0★ (2) | 47 km |
| Green Side Up Contracting -Trex Decking, Interlocking & Landscape Construction | 5.0★ (1) | 48 km |
| Legion Pools | 5.0★ (1) | 21 km |
| Mack Pools | 5.0★ (2) | 60 km |
| Mancuso Pools | 5.0★ (2) | 61 km |
| MJL Heating & Mechanical | 5.0★ (1) | In Oshawa |
| Oshawa Plumbing | 5.0★ (101) | In Oshawa |
| PENTARM GROUP | 5.0★ (2) | 51 km |
| Poolside Service | 5.0★ (1) | 47 km |
| Rosehill Pools | 4.0★ (2) | 37 km |
| Royal Pools And Landscape | 5.0★ (2) | 54 km |
| Steele Pools | 5.0★ (1) | 42 km |
| tidal wave pool services | In Oshawa | |
| Unionville Pools Inc. | 1.0★ (1) | 35 km |
| Vaughan Landscaping & Construction | 5.0★ (2) | 54 km |
| Wicked pools | In Oshawa |
How we ranked Oshawa pool builders
We scored 234 Oshawa pool builders 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 Oshawa 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 |
Pool builders in Oshawa: frequently asked questions
Who is the best pool builder in Oshawa?
By CR Score, the highest-ranked pool builder in Oshawa, ON is WEST COVE POOLS with a CR Score of 64/100. It has 4.9★ from 373 Google reviews. It is open Saturdays until 3 PM. Bloom Field Pools (#2) and Tav Pools and Water Kingdom (#3) follow. We ranked 234 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Oshawa?
ContractorsRanked ranks 234 pool builders serving Oshawa, ON. 15 of them are based in Oshawa; the rest serve it from nearby towns. Another 20 within 64 km are listed but not ranked yet. Counts are as of November 2026.
Which pool builders in Oshawa are open 24/7?
18 ranked pool builders in Oshawa post 24/7 hours. The highest-ranked are Bloom Field Pools (#2), Lazzaro Gas HVAC (#8) and ABC Swimming Pools (#16). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Oshawa work on weekends?
145 of 234 ranked pool builders post Saturday hours and 69 post Sunday hours. The highest-ranked open Saturdays are WEST COVE POOLS (#1), Bloom Field Pools (#2) and Tav Pools and Water Kingdom (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Oshawa pool builders have?
The median Google rating among 234 rated pool builders in Oshawa is 4.8★, with a median of 27 reviews. The Hot Tub People has the most, 501 reviews, and ranks #27. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank pool builders?
Each pool builder 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 pool builders outside Oshawa count in this ranking?
Yes, if they are within 64 km of the Oshawa city centre, our service radius for pool builders. 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 pool builders 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 Oshawa
- November 2026: CR Scores recalculated for 234 pool builders serving Oshawa.
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