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Eaton Family Plumbers
- Knowledge
- Communication
- Cost
“We would gladly utilize your services again in the future, and we won't hesitate to recommend Eaton Family Plumbers to our family and friends in Diamond Bar.”
Best Plumbers near Diamond Bar, CA
We have 2 contractors in Diamond Bar on file, and both are on this list, along with 22 from towns including Rancho Cucamonga (3, 17 mi), Glendora (2, 10 mi) and Upland (2, 12 mi).
16 open 24/7 · 23 open weekends · all 24 rated 4.5+ · 15 show a license
Data verified October 15, 2026
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American West
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Steve's 5 Star Service Cooling
- Faucet
- Pipe
- Work
“Nothing more comforting than knowing, when AC needs servicing before the next heat wave, Steve's is accommodating with my schedule, and was available the next day.”
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Vera Plumbing and Drain LLC
- Supply
- Kitchen
- Leak
“I will use Vera Plumbing for all of my preventive and emergency water issues and I highly recommend that you call him first for a quote before calling others.”
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Biard & Crockett Plumbing
- Upsell
- Informative
- System
“James did a great job installing a pressure regulator on my sprinkler system and figured out how to get my toilet to flush properly after two plumbers were not able to fix it!”
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Western Rooter & Plumbing
- Hydrojet
- Tree
- Work
“They communicated in a timely fashion, they had an encouraging can-do attitude, they worked extremely quickly, and explain the process all along the way, and they did a great job!”
Listed for homeowners in and around Diamond Bar, CA, these 24 companies cover plumbing work. Hours, license claims and free estimate offers come from each company's own website, so confirm them on the phone before you agree to a visit for something already running.
Area overview: Diamond Bar, CA
The 24 contractors on this page are rated from 4.7 to 5.0 across 12,536 reviews; 21 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (87%), responsiveness (80%) and quality (77%). The topics that come up most in reviews of the contractors on this page are "price", "communication" and "informative". 16 are open around the clock; 23 are open on Saturdays and 18 on Sundays. The services the contractors on this page list most often on their websites are water heaters (6), leak detection (4), drain cleaning (3), plumbing repair (3) and sewer line repair (3). 15 show a license on their websites; 1 lists staff certifications (NATE) and 9 have a BBB rating of A or A+. Domain records put 15 websites of the contractors on this page at ten or more years old; the oldest dates from 1998. 16 offer emergency call-outs; 12 offer financing or payment plans; 9 give free estimates; 16 are family- or locally-owned and 13 list coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
Why are some of these plumbers based outside Diamond Bar?
Diamond Bar is the base for 2 of the 24 listings here; the rest come from other towns within 20 mi. Plumbers work across a service area, so a neighboring base is normal. Ask how far the call-out area reaches and whether travel time is billed.
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Plumbing Concepts
- Water System
- Knowledge
- Tankless Water Heater
“He wore these things called booties in my house, which I really appreciated because I just had my house cleaned, thanks Plumbing Concepts for the great job sherri”
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JG Plumbing & Rooter Inc
- Fair
- Drain
- Toilet
“Not only did he fix my plumbing issues, but he explained it to me in laymen terms AND he showed me where my water shut off and sewer clean out is for the future.”
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JB Plumbing
- Diagnose
- Efficient
- Pricing
“I was very pleased with the Excellent Service that Corey provided he resolved the problem, took care of it and we are very grateful and happy with his service.”
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Brea/Orange County Plumbing Heating & Air Conditioning
- 2022
- Maintenance
- Plumber
“The technician Marcio was very careful, professional and meticulous in his process, he took his time to install the water heater even though it was a rainy day.”
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Renowned Plumbing & Rooter
- The Future
- Sewer
- Home
“Before we signed any contracts, lorenzo and Daniel did a thorough inspection of what the issue was and physically showed us what was wrong just to assure us that there was no misunderstanding.”
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Moffett Plumbing & Air
- Water Softener
- Personality
- Inspection
“I complained about how heavy and awkward it was for me to get the bags into the trunk of my car and then into the garage and then pouring them into the tank.”
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SWE Sewer Solutions & Engineering
- Driveway
- Property
- Communication
“In our world of so many options, so many unfilled promises, to find a company like SWE gives me confidence that there are still people that do what they say.”
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Accurate Electric
- Shoe Covers
- Outlet
- Electrician
“The flood from the upstairs bathroom to the downstairs living room occurred during the "atmospheric river" storm when app plumbers were on emergency calls February 4-7, 2024.”
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Option One Plumbing
- Oscar
- Like Button
- Estimate
“Since the repair, everything has been working perfectly, and it's clear that Jeremy not only fixed the immediate problems but also ensured that we won't face the same issues anytime soon.”
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Scott McLeod Plumbing
- Hose
- Work
- Water Heater
“After a long day filled with the stress and anxiety of having no working toilets or showers, Jessica helped us on the phone and got a technician here within the hour!”
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Homex Plumbing & Rooter
- Hose
- Jesus
- Estimate
“I found Home X Plumbing & Rooter on Rheem's website when I was looking for a licensed plumber to install my tankless water heater and to run a water line for my refrigerator.”
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High Speed Plumbing Inc
- Wall
- Drain
- Technician
“I'm never won to post reviews and this is probably the first time I've ever did it, but I was really impressed with how they took care of everything high speed was great”
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Drain Doctor Plumbing & Rooter Services
- Camera
- Polite
- Efficient
“Drain Doctor is great, Joe is very professional and polite, the work is done very well, the price is fair, I like their text feature letting you know when and who is coming to your home.”
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Hedrick & Young Plumbing
- Home
- Valve
- Leak
“Their service technician, Jordan Halladay, came and confirmed my reported issue with me first and then explained to me the process of the inspection, repair and what to expect.”
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R.K. Knight Plumbing & Rooter
- Valve
- Sink
- Toilet
“Art was very professional he explained to me what the problem was and I like the fact that there was no charge for the assessment, Art was friendly, professional and honest”
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Klaus & Sons Plumbing
- Upsell
- Valve
- Hvac
“I was extremely happy with the knowledge displayed by “Jake” concerning my tankless water heater as well as his professionalism and friendly demeanor!”
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Onestop Plumbers
- Slab
- Pricing
- Water Heater
“Ryan s is very professional ,and experienced, I had a concrete slab leak not at all easy fix Ryan and Conrad did a great job, clean and professional and this company give me a very fair price for the work they did thank you.”
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Allison Plumbing
- Quality Service
- Repipe
- Home
“So when I called Allison Plumbing yesterday, I wasn't sure they would respond so quickly or at all since I was so far out of the area and who likes going into crawl spaces.”
Plumbing Services in Diamond Bar, CA Cost Estimates
Minimum cost
$100
Maximum cost
$868
National Average
$325
Avg Per Hour Rates
$130
$181
$475
Typical price range is based on 491 cost profiles
Why these companies made our list
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