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

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

Serving Unionville, 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
F.H. Furr Finksburg
4.7(
3
)
Plumbing for a Remodel or Addition - Install

Serving Unionville, MD and surrounding areas

Approved (Corporate)

Customers say: True professional

F.H. Furr provides residential products and services in the plumbing, heating, air conditioning, and electrical business. They put their customers first and provide them with quality products from trained technicians. F.H. Furr has committed to the highest degree of professional development and training in the industry, to work diligently in exceeding every expectation of the client in need. Based out of Manassas, Va., the company has expanded throughout Northern Va., Rockville, Md., Fredericksburg, and Richmond, Va. Whether you need plumbing, heating, cooling, or electrical repairs or replacements, call on F.H. Furr for "Absolutely The Best" service!

2 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for TriState Home Services
TriState Home Services
4.6(
204
)
Plumbing for a Remodel or Addition - Install

Serving Unionville, MD and surrounding areas

In business since 1949

Free estimates

Emergency services offered

"Donny and Phill arrived on time installed floor protection and shoe coverings and did an excellent job in far less time than I expected. I would recommend Tri State for installation and maintenance of HVAC systems."
Furnace Tune Up
Floor Heating System
Additional Photos
Additional Photos
Additional Photos

+2

Response time1 day
Recommended by91%of homeowners
Avatar for Tri-County Pump Service, Inc.
Tri-County Pump Service, Inc.
4.4(
113
)
Plumbing for a Remodel or Addition - Install

Serving Unionville, MD and surrounding areas

In business since 1991

Free estimates

Emergency services offered

"Excellent technicians. Very professional. Great to work with. Honest and did not try to talk me into additional repairs I do not need right now. Quick working replaced control box, pressure gauge, pump switch, flushed and repressurized the tank and got everything running again."
Recommended by70%of homeowners
Avatar for Talon Construction Inc
Talon Construction Inc
4.9(
28
)
Plumbing for a Remodel or Addition - Install

Serving Unionville, MD and surrounding areas

In business since 2002

Warranties offered

Credit card accepted

"We selected Talon for building our screened porch, and they did a stupendous job. This was a project that was very complex, especially with the way our home’s roof comes into the space. I went with Talon over so many other contractors because of the level of trust we had with them, that they care about quality, the full understanding from them that they wouldn’t take the job on if they didn’t feel it would work, and their professional attitude and incredible knowledge. All throughout construction, they showed incredible care while working, and were extremely respectful of our property and daily routine. They went the extra mile so many times to ensure this was well built. They take immense pride in their work. It’s an added bonus that everyone we talked to were extremely kind, they are all good people, and it was such a pleasure to have conversations with everyone who works at Talon. If you have a home project you’ve been considering, don’t hesitate, contact Talon now!"
Kitchen remodel
Kitchen remodel
Fall kitchen remodel
Kitchen renovation
Custom pantry

+31

Recommended by100%of homeowners
Avatar for Myriad Home Improvement & Handyman Services LLC
Myriad Home Improvement & Handyman Services LLC
4.2(
1,728
)
Plumbing for a Remodel or Addition - Install

Serving Unionville, MD and surrounding areas

In business since 2010

Credit card accepted

"I made a Big Deal purchase with them. It went extremely well. There was no extra charge. The guy was outstanding! He was a great guy to work with. I helped him with some of the work and he was very grateful for the help. We will definitely use the service again. His name was Fred Maskeroni. Pricing was good. I'm a buyer, so I always think pricing could be better. He did a lot of things and he did them all well. You call plumbers and they're just going to do plumber. You call an electrician and they're just going to do electrical work. Well, he did plumbing, electrical, carpentry, drywall."
Concrete Work
Additional Photos
Recommended by84%of homeowners
Showing 1-10 of 36
FAQs for plumbing installation for a remodel or addition projects in Unionville, 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 Unionville, 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.