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Top-Rated Plumbing installers for a remodel or addition in Galesville - Updated Nov 2026

Avatar for Mahon Plumbing
Mahon Plumbing
4.6(
199
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"I had a plumbing issue that I thought would turn into a major headache, but Mahon Plumbing made the whole process smooth and stress-free. They arrived on time, quickly diagnosed the problem, and had it fixed before I could even make a second cup of coffee. They were professional, knowledgeable, and even gave me a few tips to avoid future issues. The pricing was fair, and there were no surprises on the bill—just great service from start to finish. If you need a plumber who knows what they’re doing and won’t leave you with a mess, I highly recommend Mahon Plumbing. I’ll definitely call them again for any future plumbing needs!"
Tankless water heater installation
Tankless Water Heater Installation
Commercial drain cleaning
Sewer Line Video Inspection
Water heater replacement

+30

Response time7 hrs
Response rate100%
Recommended by92%of homeowners
Avatar for Millersville Plumbing Inc
Millersville Plumbing Inc
4.7(
257
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 1970

Free estimates

Credit card accepted

"Millerville's Plumbing arrived AHEAD OF TIME and waited patiently for me to get home. They were at my door at 12:30 pm for a 2-5 pm appointment, so they were super anxious to finish for the week end or very efficient in completing the jobs scheduled that morning! Regardless, they were punctual to a fault.  Once I met with them to discuss the work, they assessed what had to be done, explained their better solution and got right to the job. In twenty minutes I had a new outside hose faucet to replace the one done in by the 'blizzard of 2016'. I could not have been happier with the service or their professionalism in delivering the goods.  I would highly recommend Millersville Plumbing and immediately consider them for any future plumbing needs.
"
Recommended by92%of homeowners
Avatar for Eric'S plumbing and drains
Eric'S plumbing and drains
5.0(
28
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

Emergency services offered

"Forget Len the Plumber. Use Eric Straus instead. He is efficient, professional, and reasonably priced. Due to a knee replacement, I needed a higher toilet and a grab bar. ASAP. I called Eric in the morning. Everything was done by late afternoon. He purchased the toilet for me and took the old one to the dump. He's friendly. You won't be disappointed in him. He's a gem."
Additional Photos
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+3

Recommended by100%of homeowners
Avatar for Knock You Plumb Out Plumbing Inc.
Knock You Plumb Out Plumbing Inc.
4.5(
194
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"Our water heater, which also serves as the heat for our home, died on a Fridy night.  I called lost of plumbers on Saturdy but only reached three.  One did not want the job and gave us the run around.  One seemed very professional and we'd have used them if we had not called Knock You Plumb Out but they quoted us $3000 for the same job (which is what we were expecting to pay).  The KYPO guy was hesitant to give us a bid because he did not know the price of the unit.  He told us bid for labor and assured us it would be substantially less.  I was nervous to go with him because of his lack of certainty, but he had a good review on Angie's List.  Both plumbers said it was a specialty unit and no one would be able to do anything until Monday.  Our access is outside and they spent five hours in the bitter cold (5 degrees F) installing the unit.  They stuck to their bid on the labor and gave us a great price on the unit (compared to what we found online).  We are grateful s it made ll the difference in our budget to pay less for this huge unexpected expense.  The guys who came out were nice and did a good job.  We are certainly still happy with the work a month later..."
Main sewer connection at the house
Working out of a shoring box
This particular sewer happened to be at 14' in depth.
Sediment Filter
sediment filter

+1

Recommended by95%of homeowners
Avatar for JamesIIMechanical Plumbing, LLC
JamesIIMechanical Plumbing, LLC
5.0(
11
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 2012

Credit card accepted

"James was great and very professional. I had a Leek from my bathroom shower and remodeling of another bathroom. He made sure that the work that was being performed was tested after he finished and clean up afterwards. I'm very happy and have recommended him to others."
Recommended by100%of homeowners
Avatar for Quality Plumbing & Drain Cleaning
Quality Plumbing & Drain Cleaning
4.7(
205
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"When installing the hot water bib the plumber drilled thru the wall and hit 2 wires. This was something I asked him to do while he was there. A check for wires prior to drilling in a hole would have saved me hundreds of dollars"
Additional Photos
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+14

Recommended by91%of homeowners
Pohlman Plumbing, Inc.
4.3(
66
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Pohlman Brothers created a basement bathroom in my daughter's house. They excavated the concrete floor and ground to install drain pipes and moved an existing laundry sink. They installed piping as well as a tub/shower, toilet, and sink. They are very professional, flexible, and provide excellent workmanship. All of their work was permitted and passed inspection. This is the second time I have used Pohlman Brothers for a significant remodel project and highly recommend them."
Bathroom
Bathroom
Bathroom
Bathroom
Bathroom

+1

Recommended by98%of homeowners
Avatar for Jiffy Plumbing & Heating, Inc.
Jiffy Plumbing & Heating, Inc.
4.3(
1,155
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"The entire experience from scheduling an appointment for the plumber as well as the work itself (installing a new sump pump) went exceptionally well. Sergio the plumber was meticulous in his preparations to ensure a successful outcome and he was more than willing to share information about the work he was performing. He exhibited remarkable professionalism for his craft and a very approachable demeanor. We would enthusiastically and without hesitation ask for him in the future. As for the initial contact with the company and the scheduling of the appointment, Pete Kristiansen, was not only helpful but also accurate in his predictions of a time line for the work being accomplished. Kudos to Jiffy Plumbing & Heating, Inc. for an excellent job from start to finish !"
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+8

Recommended by85%of homeowners
Avatar for Porcelite
Porcelite
4.8(
164
)
Plumbing for a Remodel or Addition - Install

Serving Galesville, MD and surrounding areas

In business since 1961

Free estimates

Credit card accepted

"We got them from Angie’s List. He came at the agreed time. He explained on what could be done and left us a brochure about it. He no longer had the color we preferred but that couldn’t be helped. He had thought that he might be able to align the bathtub with the same stuff. It turned out that he did not have the right mould for that. Our bathtub was smaller than what he thought it was going to be. He measured very carefully and told us. Then when the man came to actually install it, he was very efficient and explained it all. He did a nice job and he cleaned up everything. We were very happy with him. We thought the price was reasonable but we have nothing to compare it with."
Recommended by98%of homeowners
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FAQs for plumbing installation for a remodel or addition projects in Galesville, MD

Adding bathroom plumbing to a detached garage starts with the basic line installation cost of $900 to $1,300. On top of this base expense, you'll need to budget for each fixture. A toilet costs  $250 to $550, sinks cost $150 to $800, and a shower or bathtub costs $400 to $1,900. The project will also require ventilation, moisture-resistant materials, and possibly electrical work. Remember that these costs reflect only the plumbing aspects—additional construction, finishing, and permitting expenses will apply to complete a functional bathroom space.

While certain aspects of garage renovation might be suitable for DIY enthusiasts, plumbing installation requires professional expertise. Connecting to water and sewer systems demands specialized knowledge and equipment, and improper installation can result in severe water damage, code violations, and potential health hazards. Most municipalities require permits for plumbing modifications, and these often stipulate that licensed professionals must perform work. Consider limiting your involvement to simpler tasks like painting or basic finishing work.

The timeframe for adding plumbing to a detached garage spans one to three days for the actual plumbing work. However, this represents only the active installation period. The complete project timeline must account for planning, obtaining permits (which can take weeks depending on your locality), coordinating multiple contractors if needed, and addressing any unexpected challenges that arise during installation. Weather conditions can also impact excavation and outdoor connection work.

Adding plumbing to a detached garage will likely increase your property taxes. Tax assessors consider plumbing an improvement that enhances property value and functionality. The specific tax impact varies by location and project scope. Converting a garage into living space with plumbing facilities can trigger significant reassessment in many jurisdictions. Before proceeding with your project, consult your local tax assessor's office to understand the potential tax implications and factor this ongoing expense into your decision-making process.

The Galesville, MD homeowners’ guide to plumbing installations for a remodel or addition

From average costs to expert advice, get all the answers you need to get your job done.