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Best plumbers in Diamond Bar, CA

The highest-scoring plumber in and near Diamond Bar is Steve's Plumbing Heating & Air Conditioning (score 89, 4.9 stars from 1,688 Google reviews). 86 companies meet the 5 Star standard within 25 km; the top 30 are ranked below.

Last updated Sep 25, 2026How we rank
  1. 1

    Steve's Plumbing Heating & Air Conditioning

    4.9 · 1,688 Google reviewsUpland, CA38 years in business
    Family-ownedFree estimatesEmergency serviceFinancing available
    89SCORE
    (909) 985-5254 WebsiteFull profile
  2. 2

    All City Plumbing, Air & Electrical

    5.0 · 1,916 Google reviewsAnaheim, CA
    84SCORE
    (714) 409-6393 WebsiteFull profile
  3. 3

    J.I.G. Plumbing, Inc

    5.0 · 1,088 Google reviewsChino, CA
    84SCORE
    (909) 351-1116 WebsiteFull profile
  4. 4

    Sano Plumbing Heating AC

    5.0 · 1,075 Google reviewsAnaheim, CA
    84SCORE
    (714) 439-0778 WebsiteFull profile
  5. 5

    Orange Coast Plumbing

    5.0 · 789 Google reviewsYorba Linda, CA
    83SCORE
    (714) 955-4844 WebsiteFull profile
  6. 6
    82SCORE
    (714) 639-4400 WebsiteFull profile
  7. 7

    High speed rooter & plumbing

    5.0 · 566 Google reviewsOntario, CA
    82SCORE
    (213) 949-4202 WebsiteFull profile
  8. 8

    Happy Camper Heating, Plumbing, and AC Repair

    5.0 · 550 Google reviewsWhittier, CA
    82SCORE
    (562) 667-3599 WebsiteFull profile
  9. 9

    Done-Rite Plumbing & Rooter

    4.9 · 1,724 Google reviewsOrange, CA
    81SCORE
    (714) 605-2950 WebsiteFull profile
  10. 10

    Western Rooter & Plumbing

    4.9 · 1,650 Google reviewsArcadia, CA
    81SCORE
    (626) 448-6455 WebsiteFull profile
  11. 11

    Moffett Plumbing & Air

    4.9 · 1,428 Google reviewsOrange, CA
    81SCORE
    (714) 541-6407 WebsiteFull profile
  12. 12

    Rooter Hero Plumbing

    4.9 · 1,780 Google reviewsPomona, CA
    80SCORE
    (909) 939-4575 WebsiteFull profile
  13. 13

    The Water Heater Warehouse

    4.9 · 1,371 Google reviewsFullerton, CA
    80SCORE
    (657) 822-0422 WebsiteFull profile
  14. 14

    Metz Air Control, Plumbing, Heating & Air

    4.9 · 1,200 Google reviewsChino, CA
    80SCORE
    (909) 925-0513 WebsiteFull profile
  15. 15

    Kahuna Comfort Plumbing Heating & Air

    4.9 · 1,179 Google reviewsAnaheim, CA
    80SCORE
    (714) 406-0767 WebsiteFull profile
  16. 16

    Dymek's Freedom Plumbing, Inc

    4.9 · 1,173 Google reviewsAnaheim, CA
    80SCORE
    (714) 632-8989 WebsiteFull profile
  17. 17

    Tony's Plumbing & Rooter Inc.

    5.0 · 424 Google reviewsCorona, CA
    80SCORE
    (800) 430-3203 WebsiteFull profile
  18. 18

    Iron Mountain Plumbing

    5.0 · 374 Google reviewsAnaheim, CA
    80SCORE
    (714) 942-4540 WebsiteFull profile
  19. 19

    Honestee Plumbing

    5.0 · 332 Google reviewsFullerton, CA
    80SCORE
    (562) 343-6022 WebsiteFull profile
  20. 20

    Marvelous Plumbing

    5.0 · 325 Google reviewsBuena Park, CA
    79SCORE
    (657) 214-8919 WebsiteFull profile
  21. 21

    Plumber XP

    5.0 · 300 Google reviewsLa Habra, CA
    79SCORE
    (562) 448-2124 WebsiteFull profile
  22. 22

    SoCal Plumbing & Rooter Inc.

    5.0 · 280 Google reviewsBrea, CA
    79SCORE
    (714) 482-3982 WebsiteFull profile
  23. 23

    Service Champions Plumbing, Heating & AC

    4.8 · 8,075 Google reviewsBrea, CA
    78SCORE
    (714) 584-6595 WebsiteFull profile
  24. 24

    Barker and Sons Plumbing & Rooter

    4.8 · 4,521 Google reviewsAnaheim, CA
    78SCORE
    (714) 667-7800 WebsiteFull profile
  25. 25

    Mr. Rooter Plumbing of Orange County

    4.9 · 640 Google reviewsAnaheim, CA
    78SCORE
    (657) 549-1984 WebsiteFull profile
  26. 26

    Ted & Bros. Plumbing

    4.9 · 588 Google reviewsAnaheim, CA
    78SCORE
    (714) 290-0080 WebsiteFull profile
  27. 27

    Cisneros Brothers Plumbing

    5.0 · 253 Google reviewsChino, CA
    78SCORE
    (951) 577-1625 WebsiteFull profile
  28. 28

    Vera Plumbing and Drain LLC

    5.0 · 213 Google reviewsMira Loma, CA
    78SCORE
    (951) 419-5452 WebsiteFull profile
  29. 29

    Do It Right Plumbers

    4.8 · 2,039 Google reviewsOrange, CA
    77SCORE
    (714) 266-1376 WebsiteFull profile
  30. 30

    Marathon Plumbing, Heating and AC Repair

    4.9 · 568 Google reviewsAnaheim, CA
    77SCORE
    (626) 226-4887 WebsiteFull profile

Compare the top 10

Top plumbers in Diamond Bar by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1Steve's Plumbing Heating & Air Conditioning894.91,68838Upland
2All City Plumbing, Air & Electrical845.01,916–Anaheim
3J.I.G. Plumbing, Inc845.01,088–Chino
4Sano Plumbing Heating AC845.01,075–Anaheim
5Orange Coast Plumbing835.0789–Yorba Linda
6Biard & Crockett Plumbing, Heating, and Air Conditioning824.92,011–Orange
7High speed rooter & plumbing825.0566–Ontario
8Happy Camper Heating, Plumbing, and AC Repair825.0550–Whittier
9Done-Rite Plumbing & Rooter814.91,724–Orange
10Western Rooter & Plumbing814.91,650–Arcadia

Plumbers in Diamond Bar: quick answers

Who is the highest-rated plumber in Diamond Bar, CA?

Steve's Plumbing Heating & Air Conditioning has the highest 5 Star Score among plumbers in and near Diamond Bar: 89 out of 100, with a 4.9 star Google rating from 1,688 reviews.

How many 5 Star plumbers serve Diamond Bar?

86 plumbers meet our standard within 25 km of Diamond Bar: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 30 have 40,120 Google reviews between them, averaging 4.94 stars.

How are these plumbers ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

Plumbers near Diamond Bar

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Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.