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

Avatar for KP Plumbing
KP Plumbing
5.0(
12
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

In business since 2020

Free estimates

Warranties offered

"KSP Plumbing went above and beyond. I cannot recommend Kyle more highly. The developer installed our roman tub in a manner that now years later when the faucet and handles needed replacement there was no easy access. KSP had to literally cut through the tile to have access for replacing the faucet. The work was so expertly handled you can't even notice where they cut and then replaced the tile. This saved having to get a mason or carpenter. KSP's work was above and beyond excellent and at a fair price point. Five star."
4 zones of radiant heat/ 1 zone of baseboard heat. This unit is also a tankless water heater.
4 zones of radiant heat/ 1 zone of baseboard heat. This unit is also a tankless water heater.
4 zones of radiant heat/ 1 zone of baseboard heat. This unit is also a tankless water heater.
4 zones of radiant heat/ 1 zone of baseboard heat. This unit is also a tankless water heater.
4 zones of radiant heat/ 1 zone of baseboard heat. This unit is also a tankless water heater.

+21

Response time2 days
Response rate100%
Recommended by91%of homeowners
Avatar for Rapid Repairs - Plumbing and Handyman
Rapid Repairs - Plumbing and Handyman
4.4(
53
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

In business since 2012

Emergency services offered

"We were getting very frustrated about trying to get someone to fix this toilet. A similar repair some years ago cost about $150,
but the new super in our building said this repair would cost about $400! We considered it....then logged on to Angie?s List.
Rapid Repairs referred us to a plumber near to us and he arrived that afternoon. He assessed the problem, left to buy the needed part and fixed the toilet when he returned. The bill: $160.
We were so grateful for the speedy, efficient help we got and highly recommend this company.


"
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+2

Recommended by88%of homeowners
Easy Flow Drain Cleaning and Mechanical Services
4.8(
128
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"se  Rob is a dream come true. As a single woman running my own home and being very particular.....it is extremely important to be able to discuss the job, hear all the details, and employ someone who is honest, honorable, well qualified, neat, and highly informed. I first hired Rob for the drain problem. He accomplished that efficiently and neatly at a reasonable price. We discussed options for a back up for the sump pump. Having a finished basement, I am always concerned about water. I have never lost electricity during a rain storm....but the possibility always takes up space in my brain. I have a portable generator....but I have to be home to start it. Today Rob arrived on time and installed the back up for me. It took the whole morning as he predicted. He explained how it all worked and it is a beautiful thing. I so appreciate knowledgable and personable service. I highly recommend Easy Flow Drain and Mechanical LLC for any plumbing needs. Oh....one more thing...he noticed a leak in my fairly new furnace exhaust piping. He pointed it out and gave me several possible reasons for the leak so I could intelligently discuss it with the company that installed the new energy efficient furnace. What else could you want from a plumber? I was extremely satisfied and impressed with his service. I'm also grateful for Angie's List!!!!
"
Recommended by95%of homeowners
Avatar for Cross County Plumbing and Heating
Cross County Plumbing and Heating
4.8(
130
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"The service provided by Moe and Chase was terrific. Lisa, their office manager, was courteous, friendly and (thankfully) persistent in allowing me to schedule a convenient time for their visit. The best part? Not only were Moe and Chase professional and knowledgeable about how to diagnose and correct our AC systems issues they were friendly and funny. They played with our obnoxious puppy and said hi and bye to my young son. My wife thought that Chase was actually Enrique Iglesias. While their appearance is similar I suggested that young Mr. Iglesias most likely doesn't require a second job. Overall, the service provided by Moe, Chase and Lisa was excellent. Should we ever require help with our plumbing, AC or heating systems we will definitely contact Cross County Plumbing and Heating."
Recommended by94%of homeowners
Avatar for Orbit Water Solutions
Orbit Water Solutions
4.8(
44
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Orbit was a pleasure to deal with. They gave us an exact time they would be here for both appointments instead of giving us a window of time, which is hard to find these days. On top of that, they were on time or early each time. Justin did a wonderful job explaining the benefits, and the install team were in and out in no time. We got a softener, filtration system, and alkaline drinking water system. We couldn't be happier, and wish we would have done this sooner. A+ business!"
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+9

Recommended by97%of homeowners
Avatar for Two River Interiors LLC
Two River Interiors LLC
4.4(
42
)
Plumbing for a Remodel or Addition - Install

Serving Hillsborough, NJ and surrounding areas

In business since 1997

Free estimates

Emergency services offered

"I met with the owner of Two River Interiors, Andrew, before my wife and I had even purchased the house.  Andrew accompanied me for a walk through of the home, during which I outlined the main elements of the work I was looking to have done.  Andrew created a thorough itemized cost sheet that helped me to be certain that what we needed was still within budget. I found the sheet especially useful when negotiating the home price and other disputes once we were in contract.
Immediately upon closing, Andrew and his team went straight to work on the live-in basement suite during the two-week interim of selling our previous home.  Fresh paint, new appliances, carpet, tiles, molding, and doors were added in more than enough time to accommodate us.  Having an infant at the time, we greatly appreciated how quickly and thoroughly the job was done.
The team began work on the main house a little over a month later once we were comfortably settled.  The home had a very 70s vibe with a sunken living room, claustrophobic kitchen, and for some reason a tremendous amount of the interior walls covered in stucco and wood paneling.  Andrew was always very responsive and worked very closely with us to come up with the best design and use of our space. 
Overall, the total time to complete renovation was around 5 months with fairly general hiccups (discovered leaking, mold, some walls not structurally supported properly), but Andrew and his team were always helpful, always patient (of course my wife and I changed things as the project evolved),  and always willing to go the extra mile to make everything perfect.  I cannot stress how important that was to us.  Besides their work, which was meticulous and exceptional, having this project done meant having a team working in the same house we were living in for nearly half a year.  Everyone had the same professionalism, work ethic, and honestly that extra something that really developed into a great camaraderie.   
Andrew was always by our side every step of the way, whether meeting us to choose doors, tiles, counter tops, or even sink handles.  He always brought a thoughtful eye and a knowledgeable opinion.  The work of Two River Interiors is above and beyond and I cannot stress how pleased I have been with our entire experience. 


"
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+15

Recommended by100%of homeowners
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FAQs for plumbing installation for a remodel or addition projects in Hillsborough, NJ

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 Hillsborough, NJ 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.