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Approved Pro
Approved Pro

Mahoney's Plumbing

Water Heater Installation and Replacement, Water Heater Repair or Service, Sump Pump Repair or Replace,

About us

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Business highlights

11 years of experience

Services we offer

Backflow testing, Shower valves, Stack replacements, Water Heater Installs, Water Heater Repair

Amenities

Free Estimates

Yes

Warranties

Yes

Accepted Payment Methods

  • CreditCard
Reviews
4.675 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
83%
4
12%
3
0%
2
3%
1
3%

Filter reviews by service

Showing 1-25 of 75 reviews
Carl B.
May 2025
5.0
Water Heater Installation and Replacement
$2,275
Mike did great job. Arrived early, went right to work. Piping and iron work looks great. New State gas water heater is working fine.

Myron C.
Apr 2025
5.0
The contractor did a great job and was very friendly.

Norma J.
Mar 2025
5.0
Sump Pump Repair or Replace
Excellent service. Prompt, on time, and professional. Showed me old and new parts, and answered all my questions. Left no mess. Will definitely be calling them again!

MARK F.
Feb 2020
5.0
Yes, I recommend this pro
Mike was great cleaned out two pipes, one had been clogged for many years, affordable, quality expert.

Cher. Y.
Jan 2020
5.0
Sump Pump Repair or Replace
Yes, I recommend this pro
Prompt service!

Marce B.
Dec 2019
4.5
Yes, I recommend this pro
Mike was prompt, and kept in constant communication with me, regarding my appointment. He explained a simple test that I could run prior to his arrival, to further understand the problem. Work was done swiftly and affordably.

Linda P.
Oct 2019
0.5
I Hired them to install a new water regulator and hot/cold faucets for the washer. The hot water faucet is crooked and the water regulator sticks out of the wall. the prior one did not. Was told the hoses were not sealing on the new faucets that I needed new ones. I was never given any prices for the work until it was completed, then I found out he charged me $195 to install two new hoses on the washer. When I called to complain they agreed to refund $90 of the $195 and just charge me for the parts and was told to one year warranty on the hoses would be voided. I took a refund and will never do business with this company again. I know the cost of the hoses and it is not $105. If I was told before he put the hoses on that it was going to be $195 I would have told him to not to proceed I could do it myself, it is not rocket science. I could have gone to Home Depot and gotten hoses for $20-$30 and done it myself. If you have money to burn this company is for you.

Elsie J.
Jun 2019
5.0
Yes, I recommend this pro
Jim was so friendly, professional . He explained everything and listened to my concerns and did a great job by fixing the problem.

James G.
Jun 2019
3.5
Water Heater Installation and Replacement
I never received a paid invoice statement which they promised to send to me. I am still waiting for it. They did an excellent job, my inspection was approved by STL County.
Response from Mahoney's Plumbing
"Mr. Greenly was sent a paid credit card receipt and emailed a paid invoice as well, just found out he never received the paid invoice receipt will gladly send them another one."

Al P.
Jun 2019
4.5
Yes, I recommend this pro
Repairman was informative and professional.

Charlotte Z.
Jun 2019
4.5
Yes, I recommend this pro
Jim was knowledgable and explained every step of the way. He did a great job. Cleaned up nicely. Everything i needed done was accomplished.

Debbie W.
Jun 2019
5.0
Yes, I recommend this pro
Mike was great and explained everything he was doing and why. Will use them in future.

Lourdes F.
May 2019
5.0
Yes, I recommend this pro
Fast response and knowledgeable technician.

Dawn T.
May 2019
5.0
Yes, I recommend this pro

Paul A.
May 2019
5.0
Yes, I recommend this pro
Great service

Janet C.
May 2019
5.0
Sump Pump Repair or Replace
Yes, I recommend this pro
$450
Did a great and excellent job.

Cathleen H.
Nov 2018
5.0
Yes, I recommend this pro
Very nice, prompt, and he did the job right!

Sandy M.
Jun 2017
5.0
Water Heater Repair or Service
Yes, I recommend this pro
Excellent work! Very helpful in explanations of the system.

G S.
Jun 2017
5.0
Water Heater Repair or Service
Yes, I recommend this pro
Conscientious with the work.

Harry W.
Feb 2017
5.0
Water Heater Installation and Replacement
Yes, I recommend this pro
very professional did a goodjob.

Marie E.
Oct 2016
5.0
Water Heater Repair or Service
Yes, I recommend this pro
Mike was great. Came the same day. Repair to water heater was clean and neat. Would recommend without reservations.

Don H.
Oct 2016
5.0
Yes, I recommend this pro
Very professional. Took time to answer all my questions and explain the system. Very pleased and recommend them.

Dave M.
Sep 2016
5.0
Water Heater Installation and Replacement
Yes, I recommend this pro
They were polite. Explained my options. Were professional and got the job done as promised.

Gary H.
Jul 2016
5.0
Sump Pump Repair or Replace
Yes, I recommend this pro
Good service. Knowledgeable.

Don P.
Jul 2016
5.0
Water Heater Installation and Replacement
Yes, I recommend this pro
Good Job extra work
Showing 1-25 of 75

Licensing

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

Mahoney's Plumbing is currently rated 4.6 overall out of 5.

Monday: 8:00 AM - 4:00 PM Tuesday: 8:00 AM - 4:00 PM Wednesday: 8:00 AM - 4:00 PM Thursday: 8:00 AM - 4:00 PM Friday: 8:00 AM - 4:00 PM Saturday: Closed Sunday: Closed

Mahoney's Plumbing accepts the following forms of payment: CreditCard

Yes, Mahoney's Plumbing offers free project estimates.

No, Mahoney's Plumbing does not offer eco-friendly accreditations.

No, Mahoney's Plumbing does not offer a senior discount.

No, Mahoney's Plumbing does not offer emergency services.

Yes, Mahoney's Plumbing offers warranties.