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Find Plumbing installers for a remodel or addition in Washington DC

Avatar for Kozan Construction, LLC
Kozan Construction, LLC
4.75(
28
)

Angi Approved

In business since 1985

Free estimates

Emergency services offered

"OK, so Mr. Frank was very professional. All his team was very professional, very polite. They were on time and they went far and beyond of what they were supposed to do and did not charge me more than what they said, so I am very very very satisfied with the work that Frank did, and I wanted to thank him team for being so wonderful and such a great People, we don’t get that anymore in America, but he definitely gave me that. And I’m so happy that I hired him. I had five different people that I got proposals from, and I called all of them multiple times to check on things. And definitely Frank. He definitely made this right. So if anybody needs a Plumber, that’s the guy needs to be hired once again. Thank you very much for all your services. And I recommend Frank to anyone that needs plumbing work done Thank You,"
7 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Douglas & Son Services
Douglas & Son Services
4.78(
18
)

Angi Approved

In business since 2018

Free estimates

Emergency services offered

"Charles and Kevin were outstanding! We were very impressed by the notifications to allow us to know precisely when they would arrive. They were very clear throughout the process on what was required, what the process itself entailed, the cost, and how much time was estimated for the project. In addition, they were very professional and friendly! We would highly recommend Charles and Kevin!"
Recommended by94%of homeowners
Avatar for DAY & NIGHT PLUMBER LLC
DAY & NIGHT PLUMBER LLC
4.94(
85
)

Angi Approved

In business since 2020

Free estimates

Emergency services offered

"They were very professional. They showed up on time and did a great job. I was working from home and they caused minimal noise and disruption."
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Roto-Rooter Plumbing & Water Cleanup
Roto-Rooter Plumbing & Water Cleanup
5.00(
6
)

Angi Approved

In business since 1935

Free estimates

Emergency services offered

"The technician, Marvin, could not have been more professional, knowledgeable and efficient. The main issue we wished to resolve was changing the shower. Marvin communicated the process involved, project pricing and returned on the second day with necessary parts to complete the job. The entire experience working with him was seamless and was a great way to start 2026!"
1 neighbors recently requested a quote
Avatar for Roto-Rooter Plumbing & Water Cleanup
Roto-Rooter Plumbing & Water Cleanup
4.36(
597
)

Angi Approved

In business since 1935

Free estimates

Emergency services offered

"Roto Rooter did an awesome job replacing my main line. They worked all day and night to get the job done. Quality work at a great price. Again a huge thank you to Roland, Brandon, Wayne, Umasis, Dillion, Cliff, Damon, and Thomas. Awesome job ! Tight spot and a deep trench. Happy Holidays ! Hope you get some rest."
3 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Sila Heating, Cooling and Plumbing
Sila Heating, Cooling and Plumbing
4.64(
2,119
)

Angi Approved

In business since 1989

Free estimates

Emergency services offered

"They charged $98 to come give me an estimate for swapping our a shower valve cartridge, which was fine, but the pricing they provided was completely unreasonable, $1,000. They were unwilling to provide any detail for the price. I ended up buy the part myself for $30 and replaced it in 30 minutes."
52 neighbors recently requested a quote
Recommended by89%of homeowners
Long Fence
3.88(
226
)

In business since 1945

Free estimates

Emergency services offered

"Initial rep was great and informative. Felt comfortable with initial sale. Hardly had any contact from customer service except for the payments. There were several delays that we were not informed about unless we called to ask. Took 7 months before they showed up to begin project. Only 1 person was sent to build steps. Took a week. Hard worked, hardly took a break. Had to call again to see when they would come to pour patio. Never knew when they were coming, they just showed up. Hardly spoke with the homeowners. Inspection paperwork was just left on porch. Additional paperwork that is "required by the County" had to be completed by homeowner and taken to Court house to be notarized and filed and also provide a copy back to Long Fence. Time sensitive materials which added to homeowners to-do list. Gave this contract to LF on the surface of their history and appearance of a 'good local company' but should have stayed with original contactors in VA. Puddle of water forms when it rains"
Recommended by70%of homeowners
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FAQs for plumbing installation for a remodel or addition projects in Washington DC, DC

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 Washington DC, DC 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.