63/100CR 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 Ajax, ON (2026)
278 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ajax: WEST COVE POOLS, CR Score 63/100; 4.9★ from 373 Google reviews; open Saturdays until 3 PM.
- 9
Best for emergencies (open 24/7): Lazzaro Gas HVAC, posts 24/7 hours; ranked #9 of 278.
- 4
Most-reviewed: International Pool & Spa Centers, 407 Google reviews at 4.2★, the most of 278 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
278 Ajax pool builders are ranked here by CR Score, from ten published factors. 22 are open 24/7, 172 open Saturdays and 82 open Sundays, based on posted hours. The median Google rating is 4.8★ across 278 rated businesses.
Top 10 pool builders in Ajax at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | WEST COVE POOLS | 63 | 4.9★ (373) | Oshawa, 13 km away | Sat | Overall |
| 2 | Colonial Pools & Recreation | 62 | 4.6★ (105) | Ajax | Sat · Sun | — |
| 3 | Diver Dave Pool Leak Detection | 61 | 4.9★ (171) | Milton, 23 km away | — | — |
| 4 | International Pool & Spa Centers | 61 | 4.2★ (407) | Oshawa, 13 km away | Sat · Sun | Most reviews |
| 5 | Tav Pools and Water Kingdom | 61 | 4.8★ (190) | Oshawa, 15 km away | Sat | — |
| 6 | Bremner Pool And Spa | 60 | 4.9★ (172) | Pickering, 8 km away | — | — |
| 7 | PlasterRock Pools - Concrete Pool Surface Experts | 60 | 5.0★ (95) | Richmond Hill, 36 km away | Sat · Sun · Evenings | — |
| 8 | Premier Pool Group | 60 | 4.9★ (229) | Mississauga, 54 km away | Sat · Sun · Evenings | — |
| 9 | Lazzaro Gas HVAC | 60 | 5.0★ (140) | Ajax | 24/7 | Emergencies |
| 10 | Swim Clean Pool Service Inc | 60 | 4.9★ (181) | Vaughan, 34 km away | Sat · Evenings | — |
The 278 best pool builders in Ajax, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Ajax
62/100CR ScoreRanked #2 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, 23 km away
61/100CR ScoreRanked #3 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.
Based in Oshawa, 13 km away
61/100CR ScoreRanked #4 because of its Google rating and review volume: 4.2★ from 407 Google reviews, the most in Ajax.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshawa, 15 km away
61/100CR ScoreRanked #5 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 Pickering, 8 km away
60/100CR ScoreRanked #6 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 Richmond Hill, 36 km away
60/100CR ScoreRanked #7 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 Mississauga, 54 km away
60/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 229 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ajax
60/100CR ScoreRanked #9 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 Vaughan, 34 km away
60/100CR ScoreRanked #10 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 Mississauga, 54 km away
59/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 280 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 Pinnacle Pool
Based in Ajax
59/100CR ScoreRanked #12 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.
#13 Nebo's Pools
Based in Pickering, 6 km away
59/100CR ScoreRanked #13 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 Oshawa, 38 km away
59/100CR ScoreRanked #14 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 Markham, 20 km away
59/100CR ScoreRanked #15 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, 17 km away
59/100CR ScoreRanked #16 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 Ajax
59/100CR ScoreRanked #17 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.
#18 Avoca Pools
Based in Oshawa, 8 km away
59/100CR ScoreRanked #18 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
59/100CR ScoreRanked #19 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, 17 km away
59/100CR ScoreRanked #20 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.
Based in Etobicoke, 51 km away
58/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 59 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#22 Blue Planet Pool
Based in Richmond Hill, 33 km away
58/100CR ScoreRanked #22 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.
Based in Ajax
58/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.0★ from 129 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Toronto, 28 km away
58/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.7★ from 119 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, 22 km away
58/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 45 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 278 ranked pool builders here; the rest are on their profiles.
Also serving Ajax
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 level above construction | In Ajax | |
| A+ Gunite Pool & Spa Inc. | 5.0★ (2) | 37 km |
| Ajax Gate Repair and Installation JAGO | 5.0★ (3) | In Ajax |
| Bennett Pools | 5.0★ (2) | 25 km |
| Clear The Way Landscaping Inc | 1.0★ (2) | 42 km |
| Delta Plumbers Ajax | 4.8★ (223) | In Ajax |
| Giancola Pools | 5.0★ (2) | 31 km |
| Halo Plumbing & Maintenance Of Durham | In Ajax | |
| Mack Pools | 5.0★ (2) | 53 km |
| Mancuso Pools | 5.0★ (2) | 46 km |
| PENTARM GROUP | 5.0★ (2) | 36 km |
| Pipe Dreams Plumbing | 5.0★ (102) | In Ajax |
| Rosehill Pools | 4.0★ (2) | 28 km |
| Royal Pools And Landscape | 5.0★ (2) | 39 km |
| SALCO Landscape | 5.0★ (46) | In Ajax |
| Sama Landscaping | 4.6★ (25) | In Ajax |
| Strata Swift Ltd | 5.0★ (6) | In Ajax |
| Superb Pools & Spa | 5.0★ (2) | 51 km |
| Vaughan Landscaping & Construction | 5.0★ (2) | 38 km |
| Zwicker Contracting | In Ajax |
How we ranked Ajax pool builders
We scored 278 Ajax 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 Ajax 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 Ajax: frequently asked questions
Who is the best pool builder in Ajax?
By CR Score, the highest-ranked pool builder in Ajax, ON is WEST COVE POOLS with a CR Score of 63/100. It has 4.9★ from 373 Google reviews. It is open Saturdays until 3 PM. Colonial Pools & Recreation (#2) and Diver Dave Pool Leak Detection (#3) follow. We ranked 278 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Ajax?
ContractorsRanked ranks 278 pool builders serving Ajax, ON. 8 of them are based in Ajax; 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 Ajax are open 24/7?
22 ranked pool builders in Ajax post 24/7 hours. The highest-ranked are Lazzaro Gas HVAC (#9), Bloom Field Pools (#14) and OnParLandscaping Ltd. | Landscape Designers and Contractors (#21). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Ajax work on weekends?
172 of 278 ranked pool builders post Saturday hours and 82 post Sunday hours. The highest-ranked open Saturdays are WEST COVE POOLS (#1), Colonial Pools & Recreation (#2) and International Pool & Spa Centers (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Ajax pool builders have?
The median Google rating among 278 rated pool builders in Ajax is 4.8★, with a median of 27 reviews. International Pool & Spa Centers has the most, 407 reviews, and ranks #4. 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 Ajax count in this ranking?
Yes, if they are within 64 km of the Ajax 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 Ajax
- November 2026: CR Scores recalculated for 278 pool builders serving Ajax.
More pool builders and Ajax pages
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