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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(
50
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Schmitty's Plumbing responded to my Angi's service request almost as soon as I submitted it, and they beat out three other Angi plumbing companies in terms of pricing and transparency. I hired Schmitty's to remove an old double bowl kitchen sink and faucet with a new single bowl sink and upgraded faucet. There was no upselling or attempts to convince us to replace our garbage disposal which two of the other plumbers recommended we do. We saw no reason to replace our disposal which functions well and is not that old. Partners Drake and Gage came out to our home as scheduled, and they got to work immediately working efficiently and thoroughly. We appreciated their no-nonsense, honest, prompt service, and very fair pricing. I chose Schmitty's based on the positive customer reviews, and would hire them again. I told them I would recommend them to all my friends who have plumbing needs!"
Response time2 days
Response rate100%
Recommended by93%of homeowners
Avatar for Knockout Plumbing & Mechanical, LLC
Knockout Plumbing & Mechanical, LLC
5.0(
14
)
Plumbing for a Remodel or Addition - Install

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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+53

Recommended by100%of homeowners
Avatar for Northwest Hydrojetting, LLC
Northwest Hydrojetting, LLC
5.0(
16
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"I have hired this company on many different occasions by this point. Hot water tank replacement both electric and gas, re-plumbing a house, finish trim such as vanity, bathrooms, kitchen sink, etc. Installing clean out for mainline side sewer, scoping and clearing obstructions for mainline side sewer, digging down and replacing clogged side sewers. What is impressive and important to me is the sense of urgency, attention to detail and quality of work. In my 20 years of looking after houses, Nathan is by far the best plumber I?ve ever worked. And on top of all of that, I find the pricing to be very competitive.."
Camera inspection
Camera inspection
Repairs
Remodels
Remodels

+11

Response time4 hrs
38 neighbors recently requested a quote
Recommended by6%of homeowners
Avatar for SeaTown Electric Heating and Air
SeaTown Electric Heating and Air
4.7(
1,638
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Make the repair as requested and went beyond by installing our range which was quite a tight fit. But he persevered and got it done. I will definitely calling him for my next plumbing job."
Seattle's Rewire Specialists
Generator
Tesla Chargers
Knob and Tube Removal
Ductless Install

+26

Response time1 day
10 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Private I Plumbing LLC
Private I Plumbing LLC
5.0(
15
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Mark was able to replace my water heater quickly and efficiently and went the extra mile to make sure I understood the function of the heater and the water leak gauge -- my old one was improperly installed and submerged by water (super helpful. not.) On a follow-up call he even turned me on to a trusted electrician, cuz I need a bathroom ceiling fan installed. Two thumbs up!!"
Water heater replacement
Water heater replacement
Response time6 hrs
Response rate100%
57 neighbors recently requested a quote
Avatar for Cahill's Plumbing & Heating
Cahill's Plumbing & Heating
4.1(
38
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved

Credit card accepted

Customers say: Super punctual

"They were able to give me quote over the phone and also schedule me the next day! Harry called me in the allotted time frame and stated he was 10 minutes out. That gave me enough time to lock up the cats. He arrived and put on booties which was very nice, and got straight to work removing the old faucet and then installing the new one. He finished installing and cleaned up everything and explained the final bill. Was a great experience!"
Recommended by82%of homeowners
2 Sons Plumbing
5.0(
5
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Approved (Corporate)

In business since 2017

Credit card accepted

Offers commercial services

2 Sons Plumbing is a full-service plumbing and sewer company serving the greater Seattle area. Known for reliable service, honest recommendations, and quality workmanship, our team handles everything from everyday plumbing repairs to complex sewer solutions—helping homeowners keep their systems running smoothly year-round.

14 neighbors recently requested a quote
Avatar for All Water Plumbing LLC
All Water Plumbing LLC
5.0(
12
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"One could not ask for much more with Vlad from AWP. He was willing to take the time to discuss what he was doing and explain options. His work is very neat and precise and he maintained a very clean work environment. As someone who does most of their own work, I can assure you that I will utilize AWP for all my plumbing needs in the future."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+24

Recommended by100%of homeowners
Avatar for Danika Plumbing, LLC
Danika Plumbing, LLC
4.1(
286
)
Plumbing for a Remodel or Addition - Install

Serving Mercer Island, WA and surrounding areas

In business since 2002

Emergency services offered

Credit card accepted

"These guys are great and considered my possible home expansion when selling a water heater to us. Install price beat the competitors and the quality of the work is great. Hands down, hire these folks for your plumbing work!!"
New Laundry Room
Gas Water Heater Install
Water Main Repair
Water Pressure System Install
Found the leak!!

+10

Response time12 hrs
Recommended by86%of homeowners
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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.