62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.6★ from 650 Google reviews, the most in Alliston.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Pool Builders in Alliston, ON (2026)
252 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Alliston: International Pool & Spa Centres, CR Score 62/100; 4.6★ from 650 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): Ontario Pool Services, posts 24/7 hours; ranked #2 of 252.
- 3
Most-reviewed: Solar Swim, 581 Google reviews at 4.9★, the most of 252 ranked after International Pool & Spa Centres; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
252 Alliston pool builders are ranked here by CR Score, from ten published factors. 22 are open 24/7, 156 open Saturdays and 71 open Sundays, based on posted hours. The median Google rating is 4.8★ across 252 rated businesses.
Top 10 pool builders in Alliston at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | International Pool & Spa Centres | 62 | 4.6★ (650) | Barrie, 26 km away | Sat · Sun · Evenings | Overall |
| 2 | Ontario Pool Services | 62 | 5.0★ (150) | Toronto, 39 km away | 24/7 | Emergencies |
| 3 | Solar Swim | 61 | 4.9★ (581) | Orangeville, 31 km away | Sat | Most reviews |
| 4 | PoolZenia Etobicoke - Peace of Mind Pool Care | 59 | 5.0★ (80) | Vaughan, 30 km away | Sat · Sun · Evenings | — |
| 5 | PlasterRock Pools - Concrete Pool Surface Experts | 59 | 5.0★ (95) | Richmond Hill, 40 km away | Sat · Sun · Evenings | — |
| 6 | Pioneer Family Pools & Spas | 58 | 4.1★ (466) | Barrie, 29 km away | Sat · Sun | — |
| 7 | John's Leisurescapes | 58 | 4.5★ (77) | Alliston | Sat | — |
| 8 | ProLinks Pools Service | 58 | 5.0★ (36) | East Gwillimbury, 17 km away | — | — |
| 9 | R legacy landscapes & Pools Inc | 57 | 5.0★ (19) | Keswick, 30 km away | 24/7 | — |
| 10 | D & D Pools & Spas | 57 | 4.5★ (104) | Orangeville, 31 km away | Sat · Sun | — |
The 252 best pool builders in Alliston, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Toronto, 39 km away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 150 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#3 Solar Swim
Based in Orangeville, 31 km away
61/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 581 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vaughan, 30 km away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Richmond Hill, 40 km away
59/100CR ScoreRanked #5 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 Barrie, 29 km away
58/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.1★ from 466 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alliston
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.5★ from 77 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury, 17 km away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Keswick, 30 km away
57/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Orangeville, 31 km away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.5★ from 104 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Keswick, 23 km away
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Etobicoke, 56 km away
57/100CR ScoreRanked #12 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.
Based in Vaughan, 50 km away
57/100CR 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 Milton, 53 km away
57/100CR ScoreRanked #14 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 Collingwood, 48 km away
57/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 78 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milton, 59 km away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 187 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#17 Blue Planet Pool
Based in Richmond Hill, 45 km away
57/100CR ScoreRanked #17 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 Barrie, 36 km away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 43 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Keswick, 25 km away
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.6★ from 29 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Gwillimbury, 25 km away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.3★ from 50 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#21 Easy pools
Based in Vaughan, 44 km away
56/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#22 Mister Pool
Based in Newmarket, 34 km away
56/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 46 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Vaughan, 45 km away
56/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 83 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Innisfil, 29 km away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.8★ from 51 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Collingwood, 49 km away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 136 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 252 ranked pool builders here; the rest are on their profiles.
Also serving Alliston
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) | 53 km |
| Bestloc landscape creations | 5.0★ (1) | 47 km |
| BOSS Pools | 5.0★ (1) | 31 km |
| Certified Paving & Construction | 5.0★ (1) | 47 km |
| Clear The Way Landscaping Inc | 1.0★ (2) | 47 km |
| Expert Landscaping & Snow Removal Inc. | 5.0★ (1) | In Alliston |
| Giancola Pools | 5.0★ (2) | 62 km |
| Joseph Lauren Design Inc. | 5.0★ (1) | 42 km |
| Mack Pools | 5.0★ (2) | 32 km |
| Mancuso Pools | 5.0★ (2) | 55 km |
| New Way Interlocking Inc | 5.0★ (2) | 27 km |
| Norseman Pools | 5.0★ (1) | 28 km |
| PENTARM GROUP | 5.0★ (2) | 52 km |
| Reliable Plumber Alliston | 5.0★ (4) | In Alliston |
| Rosehill Pools | 4.0★ (2) | 49 km |
| Seaside Pools & Landscaping Inc. | 3.0★ (2) | 52 km |
| Superb Pools & Spa | 5.0★ (2) | 63 km |
| Vaughan Landscaping & Construction | 5.0★ (2) | 59 km |
| York Simcoe Pools Ltd | 5.0★ (1) | 24 km |
How we ranked Alliston pool builders
We scored 252 Alliston 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 Alliston 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 Alliston: frequently asked questions
Who is the best pool builder in Alliston?
By CR Score, the highest-ranked pool builder in Alliston, ON is International Pool & Spa Centres with a CR Score of 62/100. It has 4.6★ from 650 Google reviews. It is open 7 days a week. Ontario Pool Services (#2) and Solar Swim (#3) follow. We ranked 252 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Alliston?
ContractorsRanked ranks 252 pool builders serving Alliston, ON. 2 of them are based in Alliston; 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 Alliston are open 24/7?
22 ranked pool builders in Alliston post 24/7 hours. The highest-ranked are Ontario Pool Services (#2), R legacy landscapes & Pools Inc (#9) and OnParLandscaping Ltd. | Landscape Designers and Contractors (#12). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Alliston work on weekends?
156 of 252 ranked pool builders post Saturday hours and 71 post Sunday hours. The highest-ranked open Saturdays are International Pool & Spa Centres (#1), Ontario Pool Services (#2) and Solar Swim (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Alliston pool builders have?
The median Google rating among 252 rated pool builders in Alliston is 4.8★, with a median of 27 reviews. International Pool & Spa Centres has the most, 650 reviews, and ranks #1. 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 Alliston count in this ranking?
Yes, if they are within 64 km of the Alliston 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 Alliston
- November 2026: CR Scores recalculated for 252 pool builders serving Alliston.
- November 2026: 1 duplicate listing merged.
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