63/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 103 Google reviews, listed on Google as “Swimming pool repair service”.
Best Pool Builders in Monrovia, CA (2026)
829 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Monrovia: Glendale Pool Repair&Leaks, CR Score 63/100; 4.9★ from 103 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): PoolGenX, posts 24/7 hours; ranked #3 of 829.
- 3
Most-reviewed: PoolGenX, 447 Google reviews at 4.8★, the most of 829 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
829 Monrovia pool builders are ranked here by CR Score, from ten published factors. 113 are open 24/7, 492 open Saturdays and 274 open Sundays, based on posted hours. The median Google rating is 4.9★ across 829 rated businesses.
Top 10 pool builders in Monrovia at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Glendale Pool Repair&Leaks | 63 | 4.9★ (103) | Glendale, 14 mi away | 24/7 | Overall |
| 2 | Pool Builder Arcadia | 62 | 5.0★ (68) | Arcadia, 2 mi away | Sat · Sun · Evenings | — |
| 3 | PoolGenX | 62 | 4.8★ (447) | Riverside, 36 mi away | 24/7 | Emergencies, Most reviews |
| 4 | Encore Builders - Outdoor Living | 61 | 5.0★ (177) | Canoga Park, 35 mi away | 24/7 | — |
| 5 | Gary's Swimming Pool Supplies | 61 | 4.7★ (220) | Upland, 18 mi away | Sat · Sun | — |
| 6 | FC Pool | 61 | 4.7★ (146) | Los Angeles, 26 mi away | 24/7 | — |
| 7 | Royal Globe Pool Construction | 61 | 4.9★ (81) | Los Angeles, 23 mi away | 24/7 | — |
| 8 | Living Water Pool Service | 60 | 5.0★ (272) | La Cañada Flintridge, 12 mi away | — | — |
| 9 | Premier Leak Detection Sunland | 60 | 4.9★ (113) | Sunland, 19 mi away | Sat · Sun · Evenings | — |
| 10 | VINYL POOL PROS | 60 | 4.9★ (156) | Rancho Cucamonga, 24 mi away | Sat · Sun | — |
The 829 best pool builders in Monrovia, 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 Arcadia, 2 mi away
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 68 Google reviews, listed on Google as “Swimming pool contractor”.
#3 PoolGenX
Based in Riverside, 36 mi away
62/100CR ScoreRanked #3 because of its Google rating and review volume: 4.8★ from 447 Google reviews, the most in Monrovia.
Based in Canoga Park, 35 mi away
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 177 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Upland, 18 mi away
61/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 220 Google reviews, listed on Google as “Swimming pool contractor”.
#6 FC Pool
Based in Los Angeles, 26 mi away
61/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.7★ from 146 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Los Angeles, 23 mi away
61/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 81 Google reviews, listed on Google as “Swimming pool contractor”.
Based in La Cañada Flintridge, 12 mi away
60/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 272 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Sunland, 19 mi away
60/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 113 Google reviews, listed on Google as “Swimming pool repair service”.
#10 VINYL POOL PROS
Based in Rancho Cucamonga, 24 mi away
60/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 156 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Santa Clarita, 39 mi away
60/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 161 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Sherman Oaks, 26 mi away
60/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 73 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Los Angeles, 25 mi away
60/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 71 Google reviews, listed on Google as “Swimming pool contractor”.
Based in La Cañada Flintridge, 12 mi away
60/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 58 Google reviews, listed on Google as “Swimming pool repair service”.
#15 Cali Coast Pools
Based in Glendora, 8 mi away
60/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.7★ from 24 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Sunland, 20 mi away
60/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 104 Google reviews, listed on Google as “Swimming pool repair service”.
Based in North Hills, 28 mi away
60/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 153 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Studio City, 21 mi away
60/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.8★ from 109 Google reviews, listed on Google as “Swimming pool repair service”.
Based in San Fernando, 26 mi away
59/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 125 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Claremont, 16 mi away
59/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 63 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Covina, 8 mi away
59/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.1★ from 204 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Northridge, 33 mi away
59/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 93 Google reviews, listed on Google as “Swimming pool contractor”.
Based in Beverly Hills, 24 mi away
59/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 115 Google reviews, listed on Google as “Swimming pool repair service”.
Based in Los Angeles, 25 mi away
59/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 88 Google reviews, listed on Google as “Swimming pool repair service”.
Based in La Puente, 7 mi away
59/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.4★ from 74 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 829 ranked pool builders here; the rest are on their profiles.
Also serving Monrovia
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 |
|---|---|---|
| Baccaro Pool Service | 2.5★ (2) | 11 mi |
| BP Pool Service | 5.0★ (2) | 8 mi |
| CaliPoolTechs | 5.0★ (2) | 9 mi |
| Castillo Pool Service | 5.0★ (2) | 8 mi |
| Condor Inc | 5.0★ (2) | 6 mi |
| Crystal Clear Pool Solutions | 3.0★ (2) | 8 mi |
| Daniels Pools Services | 3.0★ (2) | 11 mi |
| Gardens Inc | 5.0★ (2) | 2 mi |
| George's Pool and Spa cleaning Service & repair | 5.0★ (2) | 14 mi |
| Huntington Pools Inc. | 5.0★ (2) | 12 mi |
| L.A Cover Guy | 2.0★ (2) | 9 mi |
| mission pool & spa | 3.0★ (2) | 13 mi |
| MSN POOL PLASTERING CONSTRUCTION | 5.0★ (2) | 13 mi |
| Pacific Custom Pools Inc | 5.0★ (2) | 6 mi |
| Pepe’s Pools Inc. | 5.0★ (2) | 14 mi |
| Phil Gomez Pool Services | 1.0★ (2) | 7 mi |
| Poolside Gardens, Inc. | 5.0★ (2) | 9 mi |
| Sarian's Pool Services | 4.0★ (2) | 11 mi |
| The Pool Geeks | 4.5★ (2) | 12 mi |
| Tropical Pools | 2.5★ (2) | 9 mi |
How we ranked Monrovia pool builders
We scored 829 Monrovia 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 Monrovia 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 Monrovia: frequently asked questions
Who is the best pool builder in Monrovia?
By CR Score, the highest-ranked pool builder in Monrovia, CA is Glendale Pool Repair&Leaks with a CR Score of 63/100. It has 4.9★ from 103 Google reviews. It is open 24/7. Pool Builder Arcadia (#2) and PoolGenX (#3) follow. We ranked 829 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Monrovia?
ContractorsRanked ranks 829 pool builders serving Monrovia, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of November 2026.
Which pool builders in Monrovia are open 24/7?
113 ranked pool builders in Monrovia post 24/7 hours. The highest-ranked are Glendale Pool Repair&Leaks (#1), PoolGenX (#3) and Encore Builders - Outdoor Living (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Monrovia work on weekends?
492 of 829 ranked pool builders post Saturday hours and 274 post Sunday hours. The highest-ranked open Saturdays are Glendale Pool Repair&Leaks (#1), Pool Builder Arcadia (#2) and PoolGenX (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Monrovia pool builders have?
The median Google rating among 829 rated pool builders in Monrovia is 4.9★, with a median of 12 reviews. PoolGenX has the most, 447 reviews, and ranks #3. 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 Monrovia count in this ranking?
Yes, if they are within 40 mi of the Monrovia 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 Monrovia
- November 2026: CR Scores recalculated for 829 pool builders serving Monrovia.
- November 2026: 11 duplicate listings merged.
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