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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

"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 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(
16
)
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
39 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 Seattle, WA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"The professionals who came made a thorough assessment of what needed to be done. The job was split between the plumbing techs according to their expertise, and each part got completed satisfactorily. I appreciated their honesty regarding what could be fixed immediately and the estimate for a bigger sewer-related job in future. The charges are reasonable. SEATOWN seems like a very organized company, their call center staff is friendly/polite, they follow through on scheduling appts."
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

"I was referred to Apollo Plumbing by G&S Heating, Cooling and Electric when my 75 Gallon Hot Water Heater Failed. G&S originally installed the water heater when they installed my Geo-Thermal Heating system and I’ve always had nothing but praise for G&S. They are honest, ethical and fair in all their business dealings and the quality of the work has been impeccable. Due to some regulatory changes, G&S could not replace my 75 Gallon Water Heater, but instead referred me to Apollo. I called and was helped by Samara, who was extremely helpful in fitting me into the schedule. Zac the installer showed up to my home, a bit late, but I was happy that he had arrived and work could commence. Zac presented me with the estimate for the service and that’s where things took a turn for the worse. I had done some research on the pricing I should expect my new hot water heater to cost. The one that had failed was 12 years old and I could have had the same exact model delivered to my home for $1,100 dollars. Home Depot and Lowes stocked a similar model and would have delivered them to my home for about the same price. Zak delivered an estimate to me that totaled over $4,800.00, of which, $2,300 was for the water heater, about $1,200.00 more than I could have obtained a replacement. When I protested, I got an explanation that it was a specialty item, the only type of water heater Apollo will install and warrantee, and several other meaningless points in trying to justify the cost. Zac did apply a “coupon” reduction of $292.00, however, it didn’t make me feel any better about the situation. I was up against a time constraint of an overseas business trip and didn’t have the luxury of backing out of the appointment, so I reluctantly accepted the estimate. Zac did a good job of installing the new heater. I’m a small business owner and have been in business for 40 years. In that period, I have never had a customer complain about or question the price of any invoice I’ve submitted to them. I was clearly overcharged for the hot water heater. As such, I would recommend others getting competing estimates after they receive one from Apollo to make sure they are not being overcharged. I won’t use them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

13 neighbors recently requested a quote
Recommended by89%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%
55 neighbors recently requested a quote
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%
4 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
41 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

"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
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Showing 1-10 of 254
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.