61/100CR Score
Ranked #1 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.
Best Pool Builders in Derry, NH (2026)
156 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Derry: E-Z Test Pool Supplies, CR Score 61/100; 4.7★ from 192 Google reviews; open Saturdays until 4 PM and Sundays until 4 PM.
- 2
Best for emergencies (open 24/7): Gunite Pool Renovators, posts 24/7 hours; ranked #2 of 156.
- 4
Most-reviewed: Reeds Ferry Sheds, 1,193 Google reviews at 5.0★, the most of 156 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
156 Derry pool builders are ranked here by CR Score, from ten published factors. 12 are open 24/7, 101 open Saturdays and 39 open Sundays, based on posted hours. The median Google rating is 4.6★ across 156 rated businesses.
Most of this list also appears on the Pool builders in Manchester ranking. See Pool builders in Manchester
Top 10 pool builders in Derry at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | E-Z Test Pool Supplies | 61 | 4.7★ (192) | Derry | Sat · Sun | Overall |
| 2 | Gunite Pool Renovators | 61 | 4.7★ (91) | Nashua, 10 mi away | 24/7 | Emergencies |
| 3 | St. Cyr Pool & Spa | 61 | 4.6★ (245) | Hampstead, 8 mi away | Sat · Sun | — |
| 4 | Reeds Ferry Sheds | 60 | 5.0★ (1,193) | Hudson, 6 mi away | Sat · Sun | Most reviews |
| 5 | Matley Pools and Spas | 60 | 4.9★ (374) | Fitchburg, 19 mi away | Sat | — |
| 6 | E-Z Test Pool Supplies | 59 | 4.6★ (220) | Plaistow, 12 mi away | Sat · Sun | — |
| 7 | St Cyr Pool & Spa | 59 | 4.7★ (910) | Middleton, 27 mi away | Sat | — |
| 8 | SSG Pools | 58 | 4.6★ (37) | Hollis, 14 mi away | 24/7 | — |
| 9 | New England Spas Natick | 58 | 4.8★ (512) | Natick, 40 mi away | Sat · Sun | — |
| 10 | Advanced Spa And Pool (ASAP) | 58 | 4.5★ (232) | Hudson, 11 mi away | Sat | — |
The 156 best pool builders in Derry, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Nashua, 10 mi away
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 91 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hampstead, 8 mi away
61/100CR ScoreRanked #3 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 Hudson, 6 mi away
60/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 1,193 Google reviews, the most in Derry.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 19 mi away
60/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 374 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plaistow, 12 mi away
59/100CR 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, 27 mi away
59/100CR 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.
#8 SSG Pools
Based in Hollis, 14 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.6★ from 37 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Natick, 40 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 512 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, 11 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.5★ from 232 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Haverhill, 4 mi away
57/100CR ScoreRanked #11 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 Haverhill, 13 mi away
57/100CR ScoreRanked #12 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.
#13 Littleton Pools
Based in Leominster, 24 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 106 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#14 SSG Pools
Based in Acton, 22 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.6★ from 203 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth, 26 mi away
56/100CR ScoreRanked #15 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.
Based in Londonderry, 3 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.3★ from 94 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, 23 mi away
56/100CR ScoreRanked #17 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.
#18 SSG Pools
Based in Hudson, 11 mi away
56/100CR ScoreRanked #18 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 Hudson, 10 mi away
55/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 6 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bedford, 11 mi away
55/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.8★ 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 Salem, 7 mi away
55/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nashua, 6 mi away
55/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lawrence, 15 mi away
55/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.4★ from 89 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#24 The Pool Doctor
Based in Haverhill, 2 mi away
55/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.3★ from 14 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Somersworth, 33 mi away
55/100CR ScoreRanked #25 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.
How we ranked Derry pool builders
We scored 156 Derry 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 Derry 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 Derry: frequently asked questions
Who is the best pool builder in Derry?
By CR Score, the highest-ranked pool builder in Derry, NH is E-Z Test Pool Supplies with a CR Score of 61/100. It has 4.7★ from 192 Google reviews. It is open Saturdays until 4 PM and Sundays until 4 PM. Gunite Pool Renovators (#2) and St. Cyr Pool & Spa (#3) follow. We ranked 156 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Derry?
ContractorsRanked ranks 156 pool builders serving Derry, NH. 1 of them is based in Derry; the rest serve it from nearby towns. Counts are as of November 2026.
Which pool builders in Derry are open 24/7?
12 ranked pool builders in Derry post 24/7 hours. The highest-ranked are Gunite Pool Renovators (#2), SSG Pools (#8) and Presidential Pools LLC (#11). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Derry work on weekends?
101 of 156 ranked pool builders post Saturday hours and 39 post Sunday hours. The highest-ranked open Saturdays are E-Z Test Pool Supplies (#1), Gunite Pool Renovators (#2) and St. Cyr Pool & Spa (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Derry pool builders have?
The median Google rating among 156 rated pool builders in Derry is 4.6★, with a median of 22 reviews. Reeds Ferry Sheds has the most, 1,193 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 Derry count in this ranking?
Yes, if they are within 40 mi of the Derry 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 Derry
- November 2026: CR Scores recalculated for 156 pool builders serving Derry.
- November 2026: 3 duplicate listings merged.
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