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Find Plumbing installers for a remodel or addition in Federal Way

Avatar for Knockout Plumbing & Mechanical, LLC
Knockout Plumbing & Mechanical, LLC
5.0(
14
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, WA and surrounding areas

Approved

In business since 2019

Emergency services offered

Warranties offered

"Zach and his crew were amazing! Our old water heater sprung a massive leak at 2:00am on a Saturday morning. Contacted Zach at 7:30am and he called right back and was here within the hour. Not only did we replace our water heater with a tankless model, but also moved it from the second floor to garage. Zach did all of this on a Saturday for a flat fee!! He and his crew were here for 9 hours without complaint or even seeming to take a rest!! Knockout Plumbing is indeed a 'Knockout' and I would highly recommend!! Kudos to all!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+53

Recommended by100%of homeowners
Avatar for RossCo Service Plumbers
RossCo Service Plumbers
4.6(
25
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, WA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"They were fantastic. Jared and Jake were very professional and courteous. They went above and beyond when replacing our water heater. The previous owners of the house installed the old water heater poorly. These guys not only replaced the water heater, but fixed all the piping and attachments as well. I’d definitely hire this company again for any plumbing issues."
Additional Photos
Additional Photos
Additional Photos
Response time7 hrs
Recommended by100%of homeowners
Avatar for Northwest Hydrojetting, LLC
Northwest Hydrojetting, LLC
5.0(
15
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, 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 by7%of homeowners
Avatar for Platinum Full Service Plumbing, LLC
Platinum Full Service Plumbing, LLC
4.5(
66
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, WA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Great customer service. Shared knowledge of what was being done and why. They even alerted me to a serious incorrect installation mistake that could have been a serious problem and costly repair very soon down the road and I had them fix it right away. I would hire Platinum plumbing in a flash should I need any other services or repairs."
Response time8 hrs
113 neighbors recently requested a quote
Recommended by88%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 Federal Way, 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 Serge's Home Imprvmnt & Rnvtn
Serge's Home Imprvmnt & Rnvtn
5.0(
39
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, WA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"I wanted to take a moment and share what a great job Serge did installing white subway tile backsplash in my kitchen! He was honest, polite, forthright, accurate and his craftsmanship skills are excellent! I am very satisfied with how it turned out and I would recommend anyone in the area looking for some professional help on those tougher home renovation projects!"
Siding repair
Siding repair
Siding repair
Siding repair
Fence repair/build

+49

Response time1 day
2 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for SIMBA SOLUTIONS CO LLC
SIMBA SOLUTIONS CO LLC
5.0(
14
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, WA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Absolutely fantastic service!!! Jason did an amazing job installing our new tankless water heater, and the whole experience was smooth and stress-free. He took the time to answer all our questions, made sure everything was set up perfectly, and left the workspace spotless. You can tell he takes pride in his work. We?re beyond happy with the results and grateful for the excellent service"
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing

+29

4 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 Federal Way, WA and surrounding areas

Approved

Credit card accepted

Customers say: Super punctual

"Jason was terrific. Although he was later than promised, I received a call TELLING me he would be late, which is great customer service these days. He was friendly, skilled, and I couldn't ask for more. I will request Jason in the the future, and will always call Cahill's when I need a plumber."
Recommended by82%of homeowners
2 Sons Plumbing
5.0(
5
)
Plumbing for a Remodel or Addition - Install

Serving Federal Way, 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
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FAQs for plumbing installation for a remodel or addition projects in Federal Way, 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 Federal Way, 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.