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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

"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 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
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Additional Photos

+53

Recommended by100%of homeowners
Avatar for Northwest Hydrojetting, LLC
Northwest Hydrojetting, LLC
5.0(
20
)
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
43 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

"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
12 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Apollo Plumbing
Apollo Plumbing
4.5(
630
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 2005

Emergency services offered

Credit card accepted

"The entire team at Apollo Plumbing was great to work with. They got me scheduled for the same day and I was notified when the technician was on his way. Mark did a thorough job inspecting my plumbing, explaining the issues and providing multiple solutions so that I could pick the right one for my family and budget. I could not be more impressed with the people and quality of service at Apollo Plumbing. I will definitely recommend them to all of my friends and family."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

14 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for LONG HORN PLUMBING LLC
LONG HORN PLUMBING LLC
4.8(
6
)
Plumbing for a Remodel or Addition - Install

Serving Seattle, WA and surrounding areas

Approved

In business since 2024

Free estimates

Offers commercial services

"Longhorn Plumbing was great. Affordability, promptness, service was awesome. They explained the issue to me completely, the process to fix it and delivered 100%. I will be calling on them for all my future needs. FYI - owner was both personable and professional. Very easy to work with."
Bath remodel
Bath remodel
Bath remodel
Mechanical room
Bath remodel

+17

Response time11 hrs
Response rate88%
13 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

"Our family is very satisfied with Randklev Plumbing LLC service 👍. Will and his great team work really effectively, on time and take their highly responsibilty on their job. Last week our refrigerator pipe was broken issue with water leaked badly. They came and fixed very professionally . We recommend to y’all call them Randklev Plumbing LLC when needed. They have very good credit and clientele in town. Angela Ho"
Response time6 hrs
15 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 253
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.