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

Avatar for Integrated Plumbing & Heating
Integrated Plumbing & Heating
4.7(
68
)
Plumbing for a Remodel or Addition - Install

Serving Islip, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Credit card accepted

"I recently had the pleasure of working with Roberto and his team for all the plumbing work on my new construction project, and I could not be happier with the results. From start to finish, their professionalism, expertise, and attention to detail were exceptional. Roberto was always on time, communicative, and incredibly knowledgeable. He and his crew handled every aspect of the plumbing from rough-in to final fixtures with precision and care. They were also very respectful of the timeline and worked seamlessly alongside other trades to keep the project on schedule. The workmanship speaks for itself everything was done cleanly, efficiently, and up to code. You can tell they take pride in their craft. I would highly recommend Roberto and his team to anyone looking for reliable, high-quality plumbing services. They truly went above and beyond."
Response time12 hrs
12 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for AquaFlow Plumbing Heating & Water Systems
AquaFlow Plumbing Heating & Water Systems
5.0(
10
)
Plumbing for a Remodel or Addition - Install

Serving Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

"I moved into my new home on 7/8 and knew I needed to replace the 20 year old hot water heater. The water was warm in the shower and brown. Originally, I planned on getting a tankless unit, but that was prohibitively expensive and not allowed in my community. Taking the next prudent steps, I secured my three estimates. Not only was AquaFlow the least expensive, but when I met Enrique, I knew I wanted to work with him on this project and all future plumbing issues. He explained what needed to be done, secured the tank from the supply dealer, and showed up at 9:00 AM promptly as promised. It was originally planned to be a two man job, but the other person couldn’t make it. Enrique did the entire job on his own. I was amazed. He worked until 5:00 PM. I asked why he didn’t just reschedule with me, but he stuck to the date and time he gave me. He also installed my new touch-less faucet and adjusted the cartridge in the shower and I now can take hot (not warm) showers."
Project Photos
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+5

2 neighbors recently requested a quote
Avatar for Clearway Plumbing & Heating
Clearway Plumbing & Heating
4.6(
181
)
Plumbing for a Remodel or Addition - Install

Serving Islip, NY and surrounding areas

In business since 1997

Free estimates

Emergency services offered

"I cannot say enough about the great response I had!I called them at 4:30 and they returned my call within a minute...literally a minute .. They asked me to text a photo of the toilet...they called right back and came right over to look at the toilet. They went to buy a part, came right back and fixed it! The job was finished by 5;40! And done right! Yes, I lucked out ... and called them at the end of their day...they could have easily let it go but instead, came right over and took on the job. I will definitely use them again if I need any plumbing work done."
Recommended by92%of homeowners
Avatar for Herber Plumbing & Heating Corp.
Herber Plumbing & Heating Corp.
4.6(
214
)
Plumbing for a Remodel or Addition - Install

Serving Islip, NY and surrounding areas

In business since 1971

Free estimates

Emergency services offered

"i have used Herber Plumbing for my plumbing issues since 1981. i called on a Sunday night and had someone here first thing Monday morning. Bob Herber as always was prompt and delivered as promised. The tech, Joe was professional and did a good job. i know whenever i hire them the job will be done right and they always stand behind their work. If possible they will help you solve a problem on the phone and save you the cost of a service call. Terrific well run company."
Response time12 hrs
Recommended by89%of homeowners
Avatar for K. Radday
K. Radday
4.8(
33
)
Plumbing for a Remodel or Addition - Install

Serving Islip, NY and surrounding areas

In business since 2017

Free estimates

Emergency services offered

"Kevin is a true professional and can be trusted to work unsupervised in your home. He understood our needs and came up with a perfect bathroom design plan for us based on that. I've worked in construction so it takes a lot to impress me, Kevin did so at each phase. The demolition was quick and clean and he removed all the old framing, electric, plumbing, floors and subfloors and rebuilt from scratch using high quality materials. Kevin's workmanship far exceeded our expectations for the project. His attention to detail and skillful execution is easily worth twice the price. He created a separate temporary bathroom for us to use during the project. There were no surprise extras or unexpected delays, he stayed within budget (even saving us money on some things) and also did the entire job in the timeframe that was originally proposed. We could not be more pleased with the outcome. Everyone who sees the new bathroom says, "It's the best room in the house!" We love it."
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+31

Response time6 hrs
Response rate100%
Recommended by100%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 Islip, NY 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
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FAQs for plumbing installation for a remodel or addition projects in Islip, NY

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 Islip, NY 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.