4.5 
1.3k+ *The Angi rating for Affordable Plumbing companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Affordable Plumbing needs.
*The HomeAdvisor rating for Affordable Plumbing companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Affordable Plumbing needs.
Last update on May 26, 2026
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"The plumbers arrived on time and were there until job was done to our satisfaction."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1981
Free estimates
Emergency services offered
"Very honest, trustworthy and inexpensive plumbing company. I had three total estimates for the work and the other two companies just seem to want to charge as much as possible and do more work then was needed. I highly recommend Western Rooter and ask for Ryan, he’s the best!"
+542
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2007
Emergency services offered
Warranties offered
"Do it Right Plumber is the best plumber I experienced so far. Their technician Mr. Dakota Dulmage is so knowledgeable, reliable and responsible. Their efficiency to my project is another reason I highly recommend this plumber to my friends. I sure will hire this professional plumber for all my future plumbing projects."
+1
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Plumber John from JIG Plumbing was professional, efficient, and hard-working. We were very pleased with the final result."
+8
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2011
Free estimates
Credit card accepted
"Donâ  t forget to get your tankless water heater flushed and a new filter output in yearly. MVP does this for us every year. They do an excellent job. Great customer service and nice plumbers/technicians."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Daniel was very helpful and knowledgeable he was able to get the job done on time and good price I would recommend him for your plumbing needs ."
+16
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"“Jose is a true professional—hardworking, reliable, and responsible. His rates are very fair compared to many others on Angi, and his honesty and skill make him a plumber you can trust. Highly recommended!”"
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Athen was responsive, quick, professional, and efficient. He even cleaned up the work areas once he was done. Would definitely contact this company again for plumbing needs in the future!"
+2
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Free estimates
Emergency services offered
"SoCal 1 Plumbing and Rooter did an outstanding job installing a new sewer main for my property. Their team was professional, efficient, and extremely knowledgeable. They carefully explained the process and handled everything with precision, from excavation to installation. The quality of their work is evident, and they made sure to leave the area clean and tidy once the job was done. I?m impressed with their attention to detail and commitment to customer satisfaction. Highly recommend them for any major plumbing work!"
+27
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
"The plumber was very knowledgeable and professional. They kept the job site clean and we are very happy with the results."
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