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Find Plumbing installers for a remodel or addition in Mercer Island

Avatar for Schmitty's Plumbing
Schmitty's Plumbing
4.8(
49
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"We will be using Schmitty's Plumbing for all of our plumbing work from now on! We were able to get an appointment quickly, and Brian was on-time, pleasant, and professional. He was clear upfront about costs and options, explained the work that was needed, and quickly made the needed repairs at a reasonable cost. We are very happy to have found a plumber that we have confidence in."
Response time1 day
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Drain Pro Plumbing Inc
Drain Pro Plumbing Inc
4.9(
560
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"The need for a footing drain was a surprise to me during my basement remodel due to water leaking in through the blocks. Raman and his team got me on the schedule fairly quickly, did a great job. They also set up new plumbing for 2 bathrooms and a kitchen in the basement, and removed my old water heater and installed a tankless water heater. Any issues that came up, they were very quick to resolve (including an old copper pipe that they didn't install which welding came loose, and they were there same day to fix.) great honest service, reliable service. Pricing, well, plumbing is not cheap, but I think they are comparable to anyone in the business. I would definitely use them again. Thanks Drain Pro!"
Water service
Split water meter
Water meter installation
Water heater installation
Broken p-trap and pop assembly

+18

Response time1 day
Recommended by97%of homeowners
Avatar for Knockout Plumbing & Mechanical, LLC
Knockout Plumbing & Mechanical, LLC
5.0(
14
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2019

Emergency services offered

Warranties offered

"We had a great experience with Knockout. Small plumbing repair job that they were able to fix quickly. Gave us multiple options on how best to address the immediate problem, as well as prospective problems in the future. No complaints and would definitely hire again."
Additional Photos
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Additional Photos

+53

Recommended by100%of homeowners
Avatar for Northwest Hydrojetting, LLC
Northwest Hydrojetting, LLC
5.0(
13
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"I have used this plumber for over 4 years now - they respond immediately to any concern, are the most honest and fair people out there! Anything from simple drain clear, or water heater install, to a side sewer and complete DADU plumbing installation…they do it all, and with great communication! I pass their name and number to anyone who is looking for an honest and reliable plumber! "
Camera inspection
Camera inspection
Repairs
Remodels
Remodels

+11

Response time4 hrs
53 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Seatown Electric Plumbing Heating & Air
Seatown Electric Plumbing Heating & Air
4.8(
1,338
)

Serving Mercer Island, WA and surrounding areas

Approved (Corporate)

In business since 2013

Emergency services offered

Warranties offered

"Lead plumber Mitchell, did great service with even better follow up. As with a lot of services, it comes down to the actual person with which you interact. Mitchell handled a drywall repair issue related to the installation by taking personal responsibility and action to cover the cost himself. Seatown plumbing manager initially said they were not covering the repair, but after speaking with Mitchell this morning confirmed that Seatown will reimburse him for the cost of repair. Mitchell exhibited a high level of competency in his work, and an equally high level of character."
Generator Repair
Additional Photos
Additional Photos
Electrical Panel Repair
Additional Photos

+44

93 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Pace Plumbing
Pace Plumbing
4.6(
14
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"I highly recommend pace plumbing, when I called I got an immediate response, once they got here they got my toilet fixed and in working order so quickly. Kevin and Riley are so great, I will definitely be calling them again. Reasonable price too!!!"
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+12

Recommended by85%of homeowners
Avatar for Cahill's Plumbing & Heating
Cahill's Plumbing & Heating
4.3(
35
)

Serving Mercer Island, WA and surrounding areas

Approved

Credit card accepted

Customers say: Quick response

"These guys were amazing! We had the plastic water intake valve behind the toilet burst and spray water everywhere at 4am. after cleaning up the mess we called Cahill's at about 6:45am and they arrived by 8:30am to fix the valve, which took them like 15 minutes. I asked them about doing all of the valves in the house (16 total) and they agreed to come back at noon to do all of them. At exactly noon they were back at my house and had all the valves changed out in less than 2 hours. They were friendly, clean, polite, and provided excellent customer service. Jason and Harry were the team that came to my house and I would highly recommend them. And thanks to Russell, the owner, for giving us a great deal on the work his team did. We will be calling on Cahill's for any future plumbing needs."
Recommended by82%of homeowners
Avatar for Knockout Plumbing & Mechanical, LLC
Knockout Plumbing & Mechanical, LLC
4.9(
7
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

Knockout Plumbing & Mechanical LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Bathroom Remodel
Toilet Install
Bathroom Remodel
Specialty Toilet Install
New Construction/Rough in

+10

Response time1 day
10 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for O'Neill Plumbing
O'Neill Plumbing
4.8(
1,031
)

Serving Mercer Island, WA and surrounding areas

In business since 1917

Free estimates

Emergency services offered

"ONeill Plumbing hit another home run with James and Kyle. They were prompt, courteous and knowledgeable. James imparted quite a bit of wisdom when it came to contacting my faucet manufacturer for a replacement part and Kyle told me how to deal with the water company should I ever experience a broken pipe and any resulting water bill issue. O’Neill Plumbing has been my go to plumber for many years and James and Kyle have definitely made sure I won’t be changing anytime in the foreseeable future."
Recommended by93%of homeowners
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Showing 1-10 of 815
FAQs for plumbing installation for a remodel or addition projects in Mercer Island, WA

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 Mercer Island, WA 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.