60/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 46 Google reviews, listed on Google as “Swimming pool repair service”.
Best Pool Builders in Castro Valley, CA (2026)
225 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Castro Valley: G-whizz Pool Cleaning, CR Score 60/100; 5.0★ from 46 Google reviews; open 24/7.
- 12
Best for emergencies (open 24/7): Claremont Pools, posts 24/7 hours; ranked #12 of 225.
- 2
Most-reviewed: Pools Etc., 366 Google reviews at 4.8★, the most of 225 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
225 Castro Valley pool builders are ranked here by CR Score, from ten published factors. 11 are open 24/7, 109 open Saturdays and 56 open Sundays, based on posted hours. The median Google rating is 4.7★ across 225 rated businesses.
Top 10 pool builders in Castro Valley at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | G-whizz Pool Cleaning | 60 | 5.0★ (46) | Vallejo, 19 mi away | 24/7 | Overall |
| 2 | Pools Etc. | 60 | 4.8★ (366) | Menlo Park, 16 mi away | — | Most reviews |
| 3 | Lucky's Pool Center | 60 | 4.8★ (64) | Hayward, 1 mi away | Sat | — |
| 4 | Preferred Pool & Spa Repair | 59 | 4.8★ (66) | Livermore, 17 mi away | Sat · Sun | — |
| 5 | The Hot Tub Store | 59 | 4.9★ (262) | Fairfield, 39 mi away | Sat · Sun | — |
| 6 | At Your Door Pool Service, Inc. | 59 | 4.9★ (292) | Antioch, 20 mi away | — | — |
| 7 | Freedom Pool Services (A Pools Etc. Company) | 59 | 4.9★ (297) | Santa Clara, 24 mi away | — | — |
| 8 | Spas & Moore | 58 | 4.6★ (36) | Lafayette, 10 mi away | Sat · Sun | — |
| 9 | Leslie's Pool Supplies | 58 | 4.5★ (81) | Pleasant Hill, 18 mi away | Sat · Sun | — |
| 10 | Pure Pool Solutions | 58 | 4.9★ (104) | Danville, 10 mi away | — | — |
The 225 best pool builders in Castro Valley, 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.
#2 Pools Etc.
Based in Menlo Park, 16 mi away
60/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 366 Google reviews, the most in Castro Valley.
Based in Hayward, 1 mi away
60/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 64 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Livermore, 17 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 66 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Fairfield, 39 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 262 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Antioch, 20 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 Santa Clara, 24 mi away
59/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 297 Google reviews, listed on Google as “Swimming pool repair service”.
#8 Spas & Moore
Based in Lafayette, 10 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.6★ from 36 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Pleasant Hill, 18 mi away
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.5★ from 81 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Danville, 10 mi away
58/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 104 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Pleasanton, 12 mi away
58/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.4★ from 48 Google reviews, listed on Google as “Swimming pool repair service”.
#12 Claremont Pools
Based in Concord, 21 mi away
58/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 25 Google reviews, listed on Google as “Swimming pool repair service”.
#13 Skim N Dip
Based in Concord, 20 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 142 Google reviews, listed on Google as “Swimming pool contractor”.
Based in San Ramon, 8 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 Pool Yeti's
Based in Richmond, 16 mi away
57/100CR ScoreRanked #15 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 Mateo, 16 mi away
57/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.2★ from 68 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Danville, 10 mi away
57/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.4★ from 23 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Walnut Creek, 15 mi away
57/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “Swimming pool contractor”.
#19 Poolsafe, LLC
Based in San Francisco, 19 mi away
57/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Tracy, 12 mi away
57/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Berkeley, 16 mi away
57/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Dublin, 9 mi away
57/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.6★ from 14 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Oakley, 20 mi away
56/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Clayton, 19 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.8★ from 52 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Oakland, 21 mi away
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Swimming pool contractor”.
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 225 ranked pool builders here; the rest are on their profiles.
Also serving Castro Valley
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) | 21 mi |
| Almaden Pool Services | 3.0★ (2) | 10 mi |
| American Built Pools | 3.0★ (2) | 12 mi |
| American Built Pools Inc | 3.0★ (2) | 9 mi |
| Berkeley Pool Remodeling | 5.0★ (2) | 16 mi |
| Clearline Pool Services | 3.5★ (2) | 16 mi |
| Cover Pro | 3.0★ (2) | 20 mi |
| Diablo Pool Pros | 4.5★ (2) | 18 mi |
| Diverse Scape Pools & Spas, Inc. | 5.0★ (2) | 13 mi |
| Four Seasons Pool Services | 3.0★ (2) | 16 mi |
| Fremont Pool CO | 5.0★ (2) | 16 mi |
| Mountain View Pool Constructions | 5.0★ (2) | 19 mi |
| Pacific Pools Inc | 5.0★ (2) | 10 mi |
| Pumps & Works | 5.0★ (2) | 16 mi |
| Rivera Family Pools & Remodeling | 5.0★ (2) | 24 mi |
| Santa Clara Pool Remodel | 5.0★ (2) | 25 mi |
| Shamrock Pool Fiberglass Inc | 3.0★ (2) | 12 mi |
| SURGEFLOW PLUMBING LLC | 5.0★ (19) | In Castro Valley |
| Town & Country Pool Services | 5.0★ (2) | 19 mi |
| Unique Pools | 5.0★ (2) | 15 mi |
How we ranked Castro Valley pool builders
We scored 225 Castro Valley 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 Castro Valley 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 Castro Valley: frequently asked questions
Who is the best pool builder in Castro Valley?
By CR Score, the highest-ranked pool builder in Castro Valley, CA is G-whizz Pool Cleaning with a CR Score of 60/100. It has 5.0★ from 46 Google reviews. It is open 24/7. Pools Etc. (#2) and Lucky's Pool Center (#3) follow. We ranked 225 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Castro Valley?
ContractorsRanked ranks 225 pool builders serving Castro Valley, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of November 2026.
Which pool builders in Castro Valley are open 24/7?
11 ranked pool builders in Castro Valley post 24/7 hours. The highest-ranked are G-whizz Pool Cleaning (#1), Claremont Pools (#12) and Advantage Pools Bay Area Inc. (#23). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Castro Valley work on weekends?
109 of 225 ranked pool builders post Saturday hours and 56 post Sunday hours. The highest-ranked open Saturdays are G-whizz Pool Cleaning (#1), Lucky's Pool Center (#3) and Preferred Pool & Spa Repair (#4). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Castro Valley pool builders have?
The median Google rating among 225 rated pool builders in Castro Valley is 4.7★, with a median of 12 reviews. Pools Etc. has the most, 366 reviews, and ranks #2. 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 Castro Valley count in this ranking?
Yes, if they are within 40 mi of the Castro Valley 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 Castro Valley
- November 2026: CR Scores recalculated for 225 pool builders serving Castro Valley.
- November 2026: 4 duplicate listings merged.
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