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Business ProfilePlumbers in Baltimore, Maryland

Mahon Plumbing

Listed in Baltimore 272 reviews(410) 766-8566

Mahon Plumbing

Mahon Plumbing handles residential, commercial and new-construction plumbing in Baltimore and the surrounding Maryland counties. It has served the area since 1994 and offers emergency plumbing service 24 hours a day, seven days a week.

Last Updated October 9, 2026.

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Business Highlights
  • Mahon Plumbing describes itself as family-owned.
  • It describes itself as a licensed Maryland utilities contractor.
  • The company lists Master Plumber #11839.
  • It describes itself as drug-free and fully insured.

Service Area

Anne Arundel County, Baltimore County, Baltimore City, Howard County and Queen Anne’s County.

Active Business Listing

Mahon Plumbing is one of 12 plumbers ProsGrade lists in Baltimore, Maryland.

Active
Public local listing
Listing details

12 services listed, including Emergency plumbing, Water heater installation & repairs and Sump pumps. Open 24 hours, 7 days a week. 272 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Mahon Plumbing compares with the other 11 plumbers on ProsGrade in Baltimore, using public Google ratings and review counts.

  • Ranks in the top half of the 12 Baltimore plumbers on ProsGrade by Google rating and review volume.

Trust Signals

24/7 emergency plumbing service available.

Services Covered

12 services
  • Emergency plumbing24/7 service for leaks, bursts and urgent plumbing issues.
  • Water heater installation & repairsGas and electric models; Rinnai tankless water heaters.
  • Sump pumpsWater-powered, battery-backup and submersible pumps.
  • Backflow device testingTesting, repairs and installations.
  • Plumbing repairsFaucets, garbage disposals, toilets and sinks.
  • Gas line installation & inspectionsInstallation and repairs.
  • New construction & renovationsResidential, commercial and new-construction plumbing.
  • Drain & sewer cleaningClog and buildup removal.
  • Jetting servicesHigh-pressure water jetting for grease, roots and tough blockages.
  • Video inspectionCamera inspections to locate sewer and drain issues.
  • Sewer line repairs & replacementRepairs and full sewer-line replacement.
  • Water main and service linesRepair, replacement and trenchless replacement.

Reviews

What customers say

Customers praise the technicians as courteous and knowledgeable. A customer who submitted an online service ticket in the middle of the night says the company emailed a response by 6:30 a.m.

Customer Reviews

Got Lemons

Shane was the plumbing professional who serviced our home. He was very professionally and knowledgeable. He was very kind and courteous and explained our situation in great detail. A new sump pump was installed, and my family is very happy. I’d also like to recognize the communication that I received as I placed a service ticket online in the middle of the night and by 6:30 AM I received an electronic response via email from the company. A prompt appointment to my liking was set and I most definitely would refer you all again and again. With Love, CJ Brown & Family (New Customer)
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Steve Greenlow

I remodeled my laundry room and had to have the plumbing relocated. I have dealt with Mahon plumbing for decades. They always send courteous respectful and very knowledgeable technicians to your home. I have a very busy Schedule and they always show up on the day and the time they promised. They treat your home with respect and the work is always top-notch. When their work is completed they clean up and make sure you're 100% satisfied. I would recommend Mahon plumbing to anyone that needs commercial or residential work done. I promise you will not be disappointed or find a better company.
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Sam Price

Wonderful company with wonderful people! Every time I call for an issue, Rose is so helpful and nice. She makes sure I get an appointment scheduled with ease & verifies information on my issue. I've had the pleasure of both Shane & Patrick visit my home to help with my water system. They are both incredibly kind, friendly, knowledgeable, and helpful! I couldn't recommend this place enough. I'll never use any other plumbing company!!
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David Schuch

Holden and Nelson showed up when scheduled and we're professional and nice. Holden went above and beyond to find the clog in our main sewer line. After they cleared it they stayed to test that the water going to the line flowed freely. I started using Mahon 14 years ago for water line leak in my front yard. Greg showed up said he would have my water back on in 4 hours. He did after digging up my front yard and busting some concrete. Had it looking like new in that 4 hour time period. 4 years ago Mahon Plumbing showed up after I had a sewage overflow from my basement toilet. They found that it was a County issue by using a camera. I recommend them for any job large or small. They post up and take care of business. Also Rose, who works in the office is super nice.
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paul 0584

I hired Mahon Plumbing to replace a 30 year old grinder pump pit at my residence. The office staff kept me informed through the process of parts ordering and scheduling. The morning of the install they sent a large crew with heavy equipment and everyone went to work. The owner committed to being on site and ensuring that everything went smoothly and he stuck to his word. They completed my install and regraded my property in less than a day. I would definitely recommend Mahon Plumbing for residential plumbing projects.
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Frequently Asked Questions

Does Mahon Plumbing assess a water heater before recommending replacement?

Its technicians assess the problem to determine whether repairs can correct it before recommending a full replacement.

What happens if a backflow preventer is not working properly?

Mahon Plumbing presents options to repair or replace the device, depending on the situation.