Top-rated plumbing installers for a remodel or addition.

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

Avatar for Escamilla Plumbing and Rooter Inc.
Escamilla Plumbing and Rooter Inc.
5.0(
51
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Emergency services offered

Warranties offered

"Gustavo was quick and efficient with diagnosing the issue, getting the parts and installing. It works perfectly. He had also installed my washing machine and replaced a valve for me and again, he exp0lained everything and finished the project. everything works very well. I will continue to call him for my plumbing needs."
Plumbing Project
Electric Heat Pump Water Heater
Shower Valve
Shower Area Remodel
New Bidet

+167

Response time1 day
Recommended by82%of homeowners
Avatar for Jess Plumbing
Jess Plumbing
4.9(
50
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Jess was did a fantastic job installing a sewer clean out for us. We had a major backup, sewage had backed up into the tubs and he came out on a Sunday to address our emergency. He was very communicative and explained the whole process. I will definitely hire him for all our future plumbing needs!"
Plumbing Project
Plumbing Project
Plumbing Project /water main
Old gate valve/ doesn’t shut off water
Installed new Zoeller sewer tank lid

+178

Response time1 day
Response rate100%
Recommended by93%of homeowners
Avatar for Mike Counsil Plumbing and Rooter
Mike Counsil Plumbing and Rooter
4.0(
331
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved (Corporate)

In business since 1994

Emergency services offered

Warranties offered

"Victoria Cedillo's team (Lead: Victoria. Team: Victor, Ruben, Richard, Pedro, and I am sorry if I missed anyone...) from Mike Counsil Plumbing did a wonderful job with our main line sewer and installing new sewer lines! Victoria's manager, Glenn, is very nice and patient. He provides guidance to Victoria's team to diagnose our sewer lines, provide recommendations and detail estimation options to us. We feel comfortable working with Glenn and Victoria during this job, and I have learned a lot regarding proper sewer lines and water lines connections. Victoria also took me into our crawl space and showed me the new sewer line at the last phase of the job. Victoria and her team are really professional and they've provided excellent customer service experience! For all the jobs they have completed, Victoria will provide photos and let us know what the current status of the job each day. Victoria is very considerate and she makes sure that we are able to use kitchen and bathroom at the end of the day (They will temporary connect the lines), and we really appreciate that! They also make sure the working areas are cleaned and covered up properly each day (if there is a wall opened) since there are rodents from our neighbors’ backyard. Mike Counsil Plumbing and Victoria’s team is knowledgeable with the city laws, proper line connections, and permit requirement. I was surprised to see a plumbing company that has their own work inspector (In this case, Dan B., was the one who came to my house for the final inspection. Thank you Dan!) to make sure all the works are according to code and it was done correctly. The works that were done at my house require city permits. Victoria makes sure we feel comfortable with the city inspection and she was present at the inspection. The company representatives such as Sabrina and Marissa are very friendly and easy to talk to. Comparing to other plumbing company, their price may not be the cheapest, but I can really see the quality in their work (compare to another plumbing company we hired years ago…). I highly recommend Mike Counsil Plumbing because I can trust their work and truly see the quality! Thank you, Victoria and your team for all the hard work! =)"
Preparing a safe environment for working on a sewer line replacement.
Water heater installation with expansion tank
Additional Photos
Additional Photos
Additional Photos

+28

Response time8 hrs
Response rate100%
Recommended by81%of homeowners
Avatar for The Tankless Guys Plumbing Corp.
The Tankless Guys Plumbing Corp.
5.0(
13
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Sergio and his team came to our rescue after we had our water heater shut off by PG&E for a safety issue. We received a detailed estimate after a thorough evaluation. Sergio provided us a range of options and patiently answered all our questions. We decided to also fix other issues we'd been considering and we were provided with a fair estimate for completing all the work at once. We agreed to also install a pressure regulating valve and a home filtration system. The Tankless Guys team was punctual on the day we began the work. They did the best they could to minimize disruptions, letting us know when we would have a water interruption and returning it as soon as possible. I was impressed by their professionalism, communication throughout the project, and attention to detail. They took their time to clean up the area they were working on at the end of the day, covering potential hazards and marking them off, and organizing the space to begin the next day. The team did uncover a couple of issues in our older home, which caused the project to take a little longer. They did not cut corners - Sergio, Daniel and Ray took their time to fix the issues so the installations could be installed properly and up to code, and to avoid other problems in the future. We are thrilled with the quality of the work, the attention to detail, and the peace of mind that our home is safe again. It was a pleasure to work with the Tankless Guys! I'm sure we will call them again for our next plumbing project."
Give us a call today at 408-580-0031
Give us a call
give us a call
give us a call
give us a call

+5

Response time7 hrs
Response rate91%
Recommended by100%of homeowners
Avatar for NS Plumbing
NS Plumbing
5.0(
9
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"We asked for a professional plumber and they sent us to the company NS Plumbing when Nestor arrived he gave us a reasonable price and installed our new water heater for us, Nestor is a is a professional at his job and would definitely recommend NS plumbing"
main sewer replacement
main sewer replacement
main sewer replacement
main sewer replacement
main sewer replacement

+2

Avatar for Bay Area Pro-Plumbing Inc.
Bay Area Pro-Plumbing Inc.
5.0(
14
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Bay Area Pro Plumbing did an outstanding job replacing our water main line. From start to finish, the team was professional, knowledgeable, and very efficient. They explained the entire process clearly, completed the work on time, and left everything clean when the job was done. The quality of workmanship was excellent, and we immediately noticed better water pressure throughout the property. It?s hard to find honest and reliable plumbers these days, but these guys truly exceeded expectations. Highly recommend Bay Area Pro Plumbing for any water main or plumbing work!"
Property clean out
Water main replacement
Water main replacement
1 neighbors recently requested a quote
Avatar for Giant Plumbing, Inc.
Giant Plumbing, Inc.
4.3(
29
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

"We had a great experience with Giant Plumbing and couldn't be happier with the outcome. After a previous water line repair by another company didn't meet our criteria, code, or accepted plumbing standards, Don carefully evaluated the situation, clearly explained what needed to be corrected, and handled everything professionally from start to finish. They fully removed the prior work, rebuilt the system to code, and completed the job exactly to our specifications. Their communication was excellent throughout -- thoughtful, transparent, and never rushed -- and the quality of workmanship was outstanding. The final result is clean, secure, and exactly what we had hoped for from the beginning. It was a huge relief to work with a licensed professional who takes pride in doing things the right way. We would absolutely recommend them and wouldn't hesitate to hire them again."
Giant Plumbing, Inc.
Giant Plumbing, Inc.
Giant Plumbing, Inc.
Giant Plumbing, Inc.
Giant Plumbing, Inc.

+4

Response time7 hrs
19 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Abdel's Home services
Abdel's Home services
5.0(
9
)
Plumbing for a Remodel or Addition - Install

Serving Cupertino, CA and surrounding areas

Approved

Hi, I’m Abdel, owner of Abdel’s Home Services. I’ve been providing residential repair and installation services for several years, helping homeowners with everything from small fixes to detailed improvement projects.\nI serve the Bay Area and surrounding communities, and I’m willing to travel locally for the right project. My specialties include TV mounting, door adjustments and installations, cabinet installation, drywall repair, fixture replacements, hardware installation, and general home repairs.\nClients hire me because I focus on quality, precision, and clear communication. I show up on time, protect your home, and make sure the work is done properly — not rushed. My goal is to leave every homeowner satisfied and confident in the results.\nI look forward to helping with your next project.

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FAQs for plumbing installation for a remodel or addition projects in Cupertino, CA

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 Cupertino, CA 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.