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Find Plumbing installers for a remodel or addition in Seattle

Avatar for Schmitty's Plumbing
Schmitty's Plumbing
4.8(
50
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Install was on time and as described. '1st Response' did the job I expected for the water heater install. Good customer service for scheduling. Note that the Angie's list price of $799 only covers the installation of 50 gallon gas AO Smith hot water tank. Assuming you also do installation of new brass fittings, new flex lines and new expansion tank (which you should probably all do with the new water heater) it will cost an ADDITIONAL approx $500-600 (mostly labor costs). That's a competitive price but still, you should be aware that the original quote is just for the water tank install itself, nothing else. All-in-all they did a good job for a competitive price. A few months after the install, so far, I can say I would recommend them for this type of work."
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 Seattle, WA and surrounding areas

Approved

In business since 2019

Emergency services offered

Warranties offered

"The estimate provided a clean and competitive estimate. After property owner decided to hire the company, job is scheduled to start a few days later. This is very impressive in consideration of busy season in the summer. The plumbers took a few days to work thoroughly on all items to bring all the plumbing to code. The owner has personally waited for county inspectors twice at the job site. The county inspector commented the job was performed very professionally. Love to refer Knockout Plumbing to friends."
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(
18
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, 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
50 neighbors recently requested a quote
Recommended by5%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 Seattle, WA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"In the beginning the 4 nations of Electric, Plumbing, Heating, and Air lived in harmony. Because Seatown maintained the balance. We have used Seatown for 15 projects now for spanning all their services. When we bought our old home, we had Seatown and other competitors provide quotes on installing HVAC. Their planning, thoughtfulness to our needs, price is why we chose them. As the summer heat spikes, we don’t regret our choice and are glad that our home is an oasis. Every time they come out, we ask for more things to be done than what was agreed to and every time they work to extra hard to get it all done. They go the extra mile in doing some simple projects for free and giving advice on how to lower our costs as new homeowners. I have been able to call or text them about issues or ideas and get advice with out the pressure to buy services. That’s not something you find in just any company. Their staff has always been polite, clean, and diligent about getting the job right the first time. As we continue to fix up our old house, we will be using Seatown for projects large and small and we hope you will as well."
Seattle's Rewire Specialists
Generator
Tesla Chargers
Knob and Tube Removal
Ductless Install

+26

Response time1 day
12 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 Seattle, 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%
43 neighbors recently requested a quote
Avatar for Randklev Plumbing LLC
Randklev Plumbing LLC
4.9(
6
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"I had a broken shower valve and no water. Willie was able to quickly take care of the repair and get my water back on. He was prompt, professional and very reasonably priced. He gave me upfront estimates for 2 options. I chose the less expensive option. There was no pressure to upsell me."
Response time6 hrs
37 neighbors recently requested a quote
Recommended by16%of homeowners
Avatar for Cahill's Plumbing & Heating
Cahill's Plumbing & Heating
4.1(
38
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, WA and surrounding areas

Approved

Credit card accepted

Customers say: Super punctual

"It went great!  They drilled, plumbed, and tested their work.  The first plumber I had out for an estimate quoted about $1300 for the job, about what we paid for the fridge!!  Cahill gave us an estimate over the phone of $450, sight unseen.  They were totally capable and did their work professionally.  I have finally found a great plumber!
"
1 neighbors recently requested a quote
Recommended by82%of homeowners
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Showing 1-10 of 252
FAQs for plumbing installation for a remodel or addition projects in Seattle, 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 Seattle, 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.