60/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 366 Google reviews, the most in Union City.
Best Pool Builders in Union City, CA (2026)
216 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union City: Pools Etc., CR Score 60/100; 4.8★ from 366 Google reviews.
- 5
Best for emergencies (open 24/7): G-whizz Pool Cleaning, posts 24/7 hours; ranked #5 of 216.
- 3
Most-reviewed: Freedom Pool Services (A Pools Etc. Company), 297 Google reviews at 4.9★, the most of 216 ranked after Pools Etc.; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
216 Union City pool builders are ranked here by CR Score, from ten published factors. 11 are open 24/7, 107 open Saturdays and 53 open Sundays, based on posted hours. The median Google rating is 4.7★ across 216 rated businesses.
Top 10 pool builders in Union City at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Pools Etc. | 60 | 4.8★ (366) | Menlo Park, 13 mi away | — | Overall |
| 2 | Preferred Pool & Spa Repair | 60 | 4.8★ (66) | Livermore, 14 mi away | Sat · Sun | — |
| 3 | Freedom Pool Services (A Pools Etc. Company) | 60 | 4.9★ (297) | Santa Clara, 17 mi away | — | Most reviews |
| 4 | Spas & Moore | 60 | 4.6★ (36) | Lafayette, 3 mi away | Sat · Sun | — |
| 5 | G-whizz Pool Cleaning | 59 | 5.0★ (46) | Vallejo, 26 mi away | 24/7 | Emergencies |
| 6 | At Your Door Pool Service, Inc. | 59 | 4.9★ (292) | Antioch, 21 mi away | — | — |
| 7 | Lucky's Pool Center | 58 | 4.8★ (64) | Hayward, 8 mi away | Sat | — |
| 8 | Leslie's Pool Supplies Pro | 58 | 4.4★ (48) | Pleasanton, 11 mi away | Sat · Sun | — |
| 9 | Pure Pool Solutions | 58 | 4.9★ (104) | Danville, 16 mi away | — | — |
| 10 | Claremont Pools | 57 | 4.8★ (25) | Concord, 26 mi away | 24/7 | — |
The 216 best pool builders in Union City, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Livermore, 14 mi away
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 66 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Santa Clara, 17 mi away
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 297 Google reviews, listed on Google as “Swimming pool repair service”.
#4 Spas & Moore
Based in Lafayette, 3 mi away
60/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ from 36 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Vallejo, 26 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 46 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Antioch, 21 mi away
59/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 292 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Hayward, 8 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 64 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Pleasanton, 11 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.4★ from 48 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Danville, 16 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 104 Google reviews, listed on Google as “Swimming pool contractor”.
#10 Claremont Pools
Based in Concord, 26 mi away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.8★ from 25 Google reviews, listed on Google as “Swimming pool repair service”.
Based in San Mateo, 16 mi away
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.2★ from 68 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Pleasant Hill, 25 mi away
57/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.5★ from 81 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Tracy, 13 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Swimming pool repair service”.
Based in San Ramon, 13 mi away
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Swimming pool contractor”.
#15 Skim N Dip
Based in Concord, 26 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 142 Google reviews, listed on Google as “Swimming pool contractor”.
#16 Pool Yeti's
Based in Richmond, 22 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Swimming pool repair service”.
Based in San Jose, 21 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.2★ from 64 Google reviews, listed on Google as “Swimming pool repair service”.
Based in San Jose, 21 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Danville, 15 mi away
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.4★ from 23 Google reviews, listed on Google as “Swimming pool repair service”.
#20 Pool Pros, Inc.
Based in San Jose, 18 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.9★ from 70 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Fremont, 8 mi away
56/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Swimming pool repair service”.
#22 Poolsafe, LLC
Based in San Francisco, 25 mi away
56/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Dublin, 13 mi away
56/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.6★ from 14 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Walnut Creek, 22 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Dublin, 10 mi away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.7★ from 51 Google reviews, listed on Google as “Swimming pool repair service”.
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 216 ranked pool builders here; the rest are on their profiles.
Also serving Union City
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 |
|---|---|---|
| Affordable Pool Care | 5.0★ (2) | 16 mi |
| Almaden Pool Services | 3.0★ (2) | 12 mi |
| American Built Pools | 3.0★ (2) | 15 mi |
| American Built Pools Inc | 3.0★ (2) | 16 mi |
| Aqua Blue Swimming Pools | 5.0★ (2) | 18 mi |
| Clearline Pool Services | 3.5★ (2) | 15 mi |
| Cover Pro | 3.0★ (2) | 18 mi |
| Diverse Scape Pools & Spas, Inc. | 5.0★ (2) | 19 mi |
| Four Seasons Pool Services | 3.0★ (2) | 17 mi |
| Fremont Pool CO | 5.0★ (2) | 9 mi |
| Hayward Plumber Bros | In Union City | |
| Mountain View Pool Constructions | 5.0★ (2) | 13 mi |
| Newark Concrete | 5.0★ (2) | In Union City |
| Pacific Pools Inc | 5.0★ (2) | 16 mi |
| Paradise Pools & Gardens | 5.0★ (2) | 22 mi |
| Pumps & Works | 5.0★ (2) | 13 mi |
| Santa Clara Pool Remodel | 5.0★ (2) | 17 mi |
| Shamrock Pool Fiberglass Inc | 3.0★ (2) | 19 mi |
| Swimply Clean Pool Services | 5.0★ (2) | 23 mi |
| Unique Pools | 5.0★ (2) | 21 mi |
How we ranked Union City pool builders
We scored 216 Union City 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 Union City 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 Union City: frequently asked questions
Who is the best pool builder in Union City?
By CR Score, the highest-ranked pool builder in Union City, CA is Pools Etc. with a CR Score of 60/100. It has 4.8★ from 366 Google reviews. Preferred Pool & Spa Repair (#2) and Freedom Pool Services (A Pools Etc. Company) (#3) follow. We ranked 216 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Union City?
ContractorsRanked ranks 216 pool builders serving Union City, CA. 1 of them is based in Union City; 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 Union City are open 24/7?
11 ranked pool builders in Union City post 24/7 hours. The highest-ranked are G-whizz Pool Cleaning (#5) and Claremont Pools (#10). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Union City work on weekends?
107 of 216 ranked pool builders post Saturday hours and 53 post Sunday hours. The highest-ranked open Saturdays are Preferred Pool & Spa Repair (#2), Spas & Moore (#4) and G-whizz Pool Cleaning (#5). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Union City pool builders have?
The median Google rating among 216 rated pool builders in Union City is 4.7★, with a median of 11 reviews. Pools Etc. has the most, 366 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 Union City count in this ranking?
Yes, if they are within 40 mi of the Union City 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 Union City
- November 2026: CR Scores recalculated for 216 pool builders serving Union City.
- November 2026: 5 duplicate listings merged.
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