1,293 water damage restoration companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Diamond Bar: Roto-Rooter Plumbing & Water Cleanup, CR Score 65/100; 4.9★ from 434 Google reviews; open 24/7.
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 1,293.
Most-reviewed: Stanley Steemer, 2,500 Google reviews at 4.9★, the most of 1,293 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,293 Diamond Bar water damage restoration companies are ranked here by CR Score, from ten published factors. 824 are open 24/7, 1,120 open Saturdays and 986 open Sundays, based on posted hours. The median Google rating is 5.0★ across 1,293 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Roto-Rooter Plumbing & Water Cleanup | 65 | 4.9★ (434) | Diamond Bar | 24/7 | Overall |
| 2 | Roto-Rooter Plumbing & Water Cleanup | 65 | 4.8★ (1,330) | Ontario, 9 mi away | 24/7 | Emergencies |
| 3 | SERVPRO of Diamond Bar/South Pomona | 65 | 5.0★ (271) | Diamond Bar | 24/7 | — |
| 4 | Stanley Steemer | 64 | 4.8★ (2,345) | Anaheim, 11 mi away | 24/7 | — |
| 5 | Cisneros Brothers Plumbing, Heating & AC Repair, Water Damage Restoration & Flood Services | 63 | 4.9★ (710) | Riverside, 21 mi away | 24/7 | — |
| 6 | SERVPRO of Walnut | 63 | 5.0★ (94) | Walnut, 3 mi away | 24/7 | — |
| 7 | SERVPRO of Fountain Valley | 63 | 5.0★ (578) | Fountain Valley, 24 mi away | 24/7 | — |
| 8 | SERVPRO of Glendora/San Dimas | 63 | 5.0★ (122) | Glendora, 7 mi away | 24/7 | — |
| 9 | Restorerz Emergency Services | 62 | 5.0★ (178) | Placentia, 11 mi away | 24/7 | — |
| 10 | CELCO | 62 | 4.9★ (75) | Diamond Bar | 24/7 | — |
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.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 434 Google reviews, listed on Google as “Water damage restoration service”.
Based in Ontario, 9 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,330 Google reviews, listed on Google as “Water damage restoration service”.
Based in Diamond Bar
Ranked #3 because of its Google rating and trade focus: 5.0★ from 271 Google reviews, listed on Google as “Water damage restoration service”.
Based in Anaheim, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,345 Google reviews, listed on Google as “Water damage restoration service”.
Based in Riverside, 21 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 710 Google reviews, listed on Google as “Water damage restoration service”.
Based in Walnut, 3 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 94 Google reviews, listed on Google as “Water damage restoration service”.
Based in Fountain Valley, 24 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 578 Google reviews, listed on Google as “Water damage restoration service”.
Based in Glendora, 7 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 122 Google reviews, listed on Google as “Water damage restoration service”.
Based in Placentia, 11 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 178 Google reviews, listed on Google as “Water damage restoration service”.
Based in Diamond Bar
Ranked #10 because of its Google rating and trade focus: 4.9★ from 75 Google reviews, listed on Google as “Water damage restoration service”.
Based in Rancho Cucamonga, 15 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 213 Google reviews, listed on Google as “Water damage restoration service”.
Based in Anaheim, 14 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 192 Google reviews, listed on Google as “Water damage restoration service”.
Based in Covina, 6 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 89 Google reviews, listed on Google as “Water damage restoration service”.
Based in West Covina, 5 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 133 Google reviews, listed on Google as “Water damage restoration service”.
Based in Colton, 28 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 2,500 Google reviews, listed on Google as “Water damage restoration service”.
Based in Rancho Cucamonga, 13 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 414 Google reviews, listed on Google as “Water damage restoration service”.
Based in Rowland Heights, 5 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 70 Google reviews, listed on Google as “Water damage restoration service”.
Based in Brea, 15 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 213 Google reviews, listed on Google as “Water damage restoration service”.
Based in Glendora, 6 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 68 Google reviews, listed on Google as “Water damage restoration service”.
Based in Westminster, 22 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 380 Google reviews, listed on Google as “Water damage restoration service”.
Based in Orange, 16 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 191 Google reviews, listed on Google as “Water damage restoration service”.
Based in Upland, 9 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “Water damage restoration service”.
Based in Santa Fe Springs, 15 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 134 Google reviews, listed on Google as “Water damage restoration service”.
Based in Chino, 7 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 147 Google reviews, listed on Google as “Water damage restoration service”.
Based in Monrovia, 13 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 103 Google reviews, listed on Google as “Water damage restoration service”.
#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 1,293 ranked water damage restoration companies here; the rest are on their profiles.
20 more water damage restoration companies 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 |
|---|---|---|
| ACE Restoration & Waterproofing, Inc. | 5.0★ (2) | 12 mi |
| ASAP Flood & Fire Restoration | 5.0★ (2) | 13 mi |
| Best Quality | 4.0★ (1) | In Diamond Bar |
| COIT Cleaning and Restoration | 4.3★ (324) | 12 mi |
| Elite | 4.0★ (2) | 7 mi |
| ER1 Services | 4.5★ (2) | 12 mi |
| GForced Mold Removal & Remediation West Covina CA | 5.0★ (2) | 8 mi |
| Go Green | 5.0★ (2) | 7 mi |
| Golden Age Construction | 5.0★ (2) | 8 mi |
| HydroNest Pros | In Diamond Bar | |
| JB Plumbing | 4.5★ (2) | 7 mi |
| JMF Commercial Construction | 5.0★ (2) | 13 mi |
| Minalya Inc. | 5.0★ (2) | 6 mi |
| PuroClean | 5.0★ (2) | 1 mi |
| Servpro San Gabriel | 5.0★ (2) | 12 mi |
| Stanley Steemer | 4.9★ (2,149) | 10 mi |
| STONESHINE Restoration & Remodeling | 5.0★ (2) | 9 mi |
| Thread Mold Removal El Monte CA | 5.0★ (2) | 13 mi |
| WaterSafe Restoration | 5.0★ (2) | 13 mi |
| Wipeout Restoration | 5.0★ (125) | 21 mi |
National price ranges in USD, not adjusted for Diamond Bar. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water damage restoration | $1,383 | $3,868 | $6,369 | Per job: typical range of customer-reported restorations. US national range | October 2026 |
We scored 1,293 Diamond Bar water damage restoration companies 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 October 23, 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 Diamond Bar 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 |