61/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.7★ from 98 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Pool Builders in Portsmouth, NH (2026)
86 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Portsmouth: St. Cyr Pool & Spa, CR Score 61/100; 4.7★ from 98 Google reviews; open 7 days a week.
- 10
Best for emergencies (open 24/7): Minuteman Pool Leaks, posts 24/7 hours; ranked #10 of 86.
- 11
Most-reviewed: Reeds Ferry Sheds, 1,193 Google reviews at 5.0★, the most of 86 ranked; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
86 Portsmouth pool builders are ranked here by CR Score, from ten published factors. 10 are open 24/7, 55 open Saturdays and 24 open Sundays, based on posted hours. The median Google rating is 4.6★ across 86 rated businesses.
Top 10 pool builders in Portsmouth at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | St. Cyr Pool & Spa | 61 | 4.7★ (98) | Portsmouth | Sat · Sun | Overall |
| 2 | Northern Pool & Spa | 58 | 4.7★ (101) | Eliot, 4 mi away | Sat | — |
| 3 | White Mountain Pool & Spa | 58 | 4.5★ (100) | Somersworth, 13 mi away | Sat · Sun | — |
| 4 | St. Cyr Pool & Spa | 58 | 4.6★ (245) | Hampstead, 26 mi away | Sat · Sun | — |
| 5 | Aqua Paradise Pools & Spas | 58 | 4.5★ (81) | Portsmouth | Sat | — |
| 6 | E-Z Test Pool Supplies | 58 | 4.6★ (220) | Plaistow, 25 mi away | Sat · Sun | — |
| 7 | St Cyr Pool & Spa | 57 | 4.7★ (910) | Middleton, 37 mi away | Sat | — |
| 8 | Ace Pool Services | 57 | 4.9★ (103) | Rochester, 25 mi away | — | — |
| 9 | E-Z Test Pool Supplies | 56 | 4.7★ (192) | Derry, 32 mi away | Sat · Sun | — |
| 10 | Minuteman Pool Leaks | 56 | 5.0★ (3) | Portsmouth | 24/7 | Emergencies |
The 86 best pool builders in Portsmouth, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Eliot, 4 mi away
58/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 101 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Somersworth, 13 mi away
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.5★ from 100 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hampstead, 26 mi away
58/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ from 245 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth
58/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.5★ from 81 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plaistow, 25 mi away
58/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.6★ from 220 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Middleton, 37 mi away
57/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.7★ from 910 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rochester, 25 mi away
57/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 103 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Derry, 32 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 192 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 37 mi away
55/100CR ScoreRanked #11 because of its Google rating and review volume: 5.0★ from 1,193 Google reviews, the most in Portsmouth.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 D and D Pools
Based in Peabody, 32 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Amesbury, 19 mi away
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.6★ 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 Haverhill, 34 mi away
54/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ from 44 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Reading, 38 mi away
54/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.8★ from 79 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Haverhill, 28 mi away
54/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dover, 4 mi away
54/100CR ScoreRanked #17 because of its Google rating and trade focus: 3.7★ from 58 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Biddeford, 28 mi away
54/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Dover, 10 mi away
54/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.4★ from 13 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kingston, 17 mi away
53/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#21 Wilson pools
Based in Amesbury, 16 mi away
53/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.6★ from 24 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Peabody, 40 mi away
53/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.4★ from 107 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sanford, 23 mi away
53/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.6★ from 56 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#24 SSG Pools
Based in Hudson, 36 mi away
52/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Leominster, 39 mi away
52/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 21 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 86 ranked pool builders here; the rest are on their profiles.
Also serving Portsmouth
20 more pool builders within 40 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 |
|---|---|---|
| AEM Pool Renovations | 5.0★ (1) | 36 mi |
| American Pool Liners Bedford | 1.0★ (2) | 39 mi |
| Cole Landscaping | 27 mi | |
| Coversafe | 5.0★ (2) | 15 mi |
| Enon Pool Services | 1.0★ (1) | 36 mi |
| Gemini Pool Service Inc | 8 mi | |
| Granite Pools & Outdoor Living | 4 mi | |
| Gunite Construction | 3.5★ (2) | 32 mi |
| Landesign | 5.0★ (1) | 33 mi |
| Luxury Pools | 3.0★ (2) | 34 mi |
| ND Landscape Services | 26 mi | |
| New England Waterscapes Design | 3.0★ (1) | 40 mi |
| Nuimage Outdoors | In Portsmouth | |
| Performance pool service llc | 5.0★ (2) | 24 mi |
| Plastering Pools | 5.0★ (1) | 33 mi |
| Poolman | 1.0★ (1) | 36 mi |
| SeacoastConcrete | 3.7★ (12) | In Portsmouth |
| T&J Builders | 5.0★ (28) | In Portsmouth |
| TC Hafford Basement Systems | In Portsmouth | |
| Therma-HEXX Corporation | In Portsmouth |
How we ranked Portsmouth pool builders
We scored 86 Portsmouth 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 Portsmouth 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 Portsmouth: frequently asked questions
Who is the best pool builder in Portsmouth?
By CR Score, the highest-ranked pool builder in Portsmouth, NH is St. Cyr Pool & Spa with a CR Score of 61/100. It has 4.7★ from 98 Google reviews. It is open 7 days a week. Northern Pool & Spa (#2) and White Mountain Pool & Spa (#3) follow. We ranked 86 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Portsmouth?
ContractorsRanked ranks 86 pool builders serving Portsmouth, NH. 3 of them are based in Portsmouth; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of November 2026.
Which pool builders in Portsmouth are open 24/7?
10 ranked pool builders in Portsmouth post 24/7 hours. The highest-ranked are Minuteman Pool Leaks (#10), D and D Pools (#12) and Presidential Pools LLC (#16). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Portsmouth work on weekends?
55 of 86 ranked pool builders post Saturday hours and 24 post Sunday hours. The highest-ranked open Saturdays are St. Cyr Pool & Spa (#1), Northern Pool & Spa (#2) and White Mountain Pool & Spa (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Portsmouth pool builders have?
The median Google rating among 86 rated pool builders in Portsmouth is 4.6★, with a median of 21 reviews. Reeds Ferry Sheds has the most, 1,193 reviews, and ranks #11. 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 Portsmouth count in this ranking?
Yes, if they are within 40 mi of the Portsmouth city center, 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 Portsmouth
- November 2026: CR Scores recalculated for 86 pool builders serving Portsmouth.
- November 2026: 1 duplicate listing merged.
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