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Find Plumbing installers for a remodel or addition in Mercer Island

Avatar for Danika Plumbing, LLC

Danika Plumbing, LLC

11015 Airport Road
4.37(
239
)
Approved Pro

Danika Plumbing, LLC

11015 Airport Road
4.37(
239
)
Approved Pro
Customers say: Quality work
37 local quotes requested
23 years of experience

With years of experience serving the area, we are your solution for all your plumbing needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Check out our 5 star reviews from happy customers! Call us today so we can discuss your needs and make a plan that fits your budget. Satisfaction is guaranteed!

"The technician was amazing. The office communication was terrible."

Cynthia K on June 2023

With years of experience serving the area, we are your solution for all your plumbing needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Check out our 5 star reviews from happy customers! Call us today so we can discuss your needs and make a plan that fits your budget. Satisfaction is guaranteed!

"The technician was amazing. The office communication was terrible."

Cynthia K on June 2023


Avatar for Northwest Hydrojetting, LLC

Northwest Hydrojetting, LLC

16107 44th Ave E
5.00(
5
)
Approved Pro

Northwest Hydrojetting, LLC

16107 44th Ave E
5.00(
5
)
Approved Pro
Customers say: Quick response
45 local quotes requested
7 years of experience

Hello! Thank you for choosing Northwest Hydrojetting LLC, your go-to company for plumbing repairs, hydrojetting and installations such as toilets, faucets, water heaters etc. We offer very competitive pricing as we are family owned & operated. We look forward to assisting you with your next project!

"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.. "

Brad G on July 2025

Hello! Thank you for choosing Northwest Hydrojetting LLC, your go-to company for plumbing repairs, hydrojetting and installations such as toilets, faucets, water heaters etc. We offer very competitive pricing as we are family owned & operated. We look forward to assisting you with your next project!

"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.. "

Brad G on July 2025


Avatar for Knockout Plumbing & Mechanical, LLC

Knockout Plumbing & Mechanical, LLC

1724 South Spokane Street
4.86(
7
)
Approved Pro

Knockout Plumbing & Mechanical, LLC

1724 South Spokane Street
4.86(
7
)
Approved Pro
Customers say: Quick response
12 local quotes requested
6 years of experience

Knockout Plumbing & Mechanical LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"I found the leak in the attic and knew exactly where to find it. I had to let them go through my room ceiling after looking at where the burst was located. No way they could get to it any other way. Job done in an hour. Is $1k to expensive? When 1000's are experiencing the same issue? No you do what you need to do to come back online. I was happy with their business. They explained how to avoid this in the future."

Suzanne D on January 2024

Knockout Plumbing & Mechanical LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"I found the leak in the attic and knew exactly where to find it. I had to let them go through my room ceiling after looking at where the burst was located. No way they could get to it any other way. Job done in an hour. Is $1k to expensive? When 1000's are experiencing the same issue? No you do what you need to do to come back online. I was happy with their business. They explained how to avoid this in the future."

Suzanne D on January 2024


Avatar for Iron Earth Construction LLC

Iron Earth Construction LLC

115 West Hill Street
5.00(
3
)
Approved Pro

Iron Earth Construction LLC

115 West Hill Street
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
30 local quotes requested

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023


Avatar for Professional Appliance Repair

Professional Appliance Repair

4.60(
15
)
Approved Pro

Professional Appliance Repair

4.60(
15
)
Approved Pro
Customers say: Quality work
379 local quotes requested
Free onsite estimate

Are you looking for Professional Appliance Repair in Seattle, Bellevue, Takoma, Issaquah, Kirkland, Dedmont, Newcastle, and surrounding areas? In this case, you came to the right place! At Professional Appliance Repair we offer expert appliance repair and maintenance services for refrigerators, washing machines, dryers, dishwashers, ranges, ovens stoves, and cooktops, no matter what model number does it have!

"I'd like to express my disappointment with the recent service visit. The technician displayed unprofessional behavior through rude questioning and used inappropriate tools (Cobra Pliers instead of proper hex ratchet or ratchet wrenches) that scratched the burner base. He quoted an additional $250 for cleaning on top of the $99 visit fee, which I had no option but to agree, then failed to fix the issue and recommended replacing the entire assembly. The lack of respect shown toward me as a customer, combined with the use of wrong tools and failure to complete the repair, made this experience not one I would recommend to others."

erez k on September 2025

Are you looking for Professional Appliance Repair in Seattle, Bellevue, Takoma, Issaquah, Kirkland, Dedmont, Newcastle, and surrounding areas? In this case, you came to the right place! At Professional Appliance Repair we offer expert appliance repair and maintenance services for refrigerators, washing machines, dryers, dishwashers, ranges, ovens stoves, and cooktops, no matter what model number does it have!

"I'd like to express my disappointment with the recent service visit. The technician displayed unprofessional behavior through rude questioning and used inappropriate tools (Cobra Pliers instead of proper hex ratchet or ratchet wrenches) that scratched the burner base. He quoted an additional $250 for cleaning on top of the $99 visit fee, which I had no option but to agree, then failed to fix the issue and recommended replacing the entire assembly. The lack of respect shown toward me as a customer, combined with the use of wrong tools and failure to complete the repair, made this experience not one I would recommend to others."

erez k on September 2025


Avatar for Seatown Electric Plumbing Heating & Air

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,337
)
Approved Pro

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,337
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
4869 local quotes requested

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"It was way too expensive for the work that was performed. They originally said that the pipes leading up to the faucet may need to be replaced and the wall opened up. Previously before engaging them. I asked for a possible quote for how much it would cost and they told me that it was up to the technician. When they came out to do the work that they would determine the amount. I asked the technician how much it would and he told me that it was up to the company to decide for how much the work would cost. When I contacted the company they told me again that it would be up to the technician to determine the how much it would cost by checking the amount of work. I could not get an answer from both of them because they would just keep passing each other on who to ask for the quote. After the project was completed, I was given the bill of about $750+ to replace the faucet, to replace the hoses and the two knobs roughly $350+ each. When I called the company about the price, I was transferred to the dispatchers and was told that I need to talk to the technician for it."

Peggy M on September 2025

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"It was way too expensive for the work that was performed. They originally said that the pipes leading up to the faucet may need to be replaced and the wall opened up. Previously before engaging them. I asked for a possible quote for how much it would cost and they told me that it was up to the technician. When they came out to do the work that they would determine the amount. I asked the technician how much it would and he told me that it was up to the company to decide for how much the work would cost. When I contacted the company they told me again that it would be up to the technician to determine the how much it would cost by checking the amount of work. I could not get an answer from both of them because they would just keep passing each other on who to ask for the quote. After the project was completed, I was given the bill of about $750+ to replace the faucet, to replace the hoses and the two knobs roughly $350+ each. When I called the company about the price, I was transferred to the dispatchers and was told that I need to talk to the technician for it."

Peggy M on September 2025


Avatar for ATG Built

ATG Built

8230 S. 192 St.
5.00(
4
)
Approved Pro

ATG Built

8230 S. 192 St.
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
502 local quotes requested

ATG Built has been a trusted authority in Kitchen and Bathroom remodeling throughout the Greater Seattle area for over 11 years. Our expertise extends to a wide variety of services, catering to full home renovations, bathroom and kitchen remodels, and additions. Our comprehensive offerings includes securing permits, design, structural changes such as wall removal and beam installation, layout modifications, roofing, siding, staircase enhancements, heated floor installations, electrical work, mechanical systems, HVAC, plumbing, drywall, and the installation of custom or budget-friendly builder-grade cabinets and countertops. We take care of every aspect of your project, illuminating often overwhelming experience of coordinating with multiple contractors. Our one-on-one approach with each customer ensures that every detail is precise to industry standards. Prior to commencing your remodel, we offer a complimentary onsite estimate conducted by our project manager that helps to determine the necessary scope of work for your project. Following the onsite assessment, we encourage you to schedule an appointment in our showroom, where you can explore our selections. Our staff will guide you through the entire remodeling process, offering a various selections of stone, tile, and cabinet samples tailored to your project needs. In-house designers are available to assist you in making selections within your budget. Additionally, we specialize in in-house fabrication and installation of custom kitchen countertops, islands, vanities, and more. Our experienced team ensures a seamless project progression, addressing your inquiries and coordinating critical project tasks. ATG offers competitive and budget-friendly pricing, ensuring that your renovation goals are within reach. We look forward to working with you, and transform your dreams into reality. Additional phone number: (253)290-1963.

"Atlantic Tile & Granite did a great job on our kitchen countertops and island in our old house in 2013, so we had them to do the countertops and island for our newly built house (2023) as well. Once again, the outcome was nothing less than fantastic."

Scott W on August 2023

ATG Built has been a trusted authority in Kitchen and Bathroom remodeling throughout the Greater Seattle area for over 11 years. Our expertise extends to a wide variety of services, catering to full home renovations, bathroom and kitchen remodels, and additions. Our comprehensive offerings includes securing permits, design, structural changes such as wall removal and beam installation, layout modifications, roofing, siding, staircase enhancements, heated floor installations, electrical work, mechanical systems, HVAC, plumbing, drywall, and the installation of custom or budget-friendly builder-grade cabinets and countertops. We take care of every aspect of your project, illuminating often overwhelming experience of coordinating with multiple contractors. Our one-on-one approach with each customer ensures that every detail is precise to industry standards. Prior to commencing your remodel, we offer a complimentary onsite estimate conducted by our project manager that helps to determine the necessary scope of work for your project. Following the onsite assessment, we encourage you to schedule an appointment in our showroom, where you can explore our selections. Our staff will guide you through the entire remodeling process, offering a various selections of stone, tile, and cabinet samples tailored to your project needs. In-house designers are available to assist you in making selections within your budget. Additionally, we specialize in in-house fabrication and installation of custom kitchen countertops, islands, vanities, and more. Our experienced team ensures a seamless project progression, addressing your inquiries and coordinating critical project tasks. ATG offers competitive and budget-friendly pricing, ensuring that your renovation goals are within reach. We look forward to working with you, and transform your dreams into reality. Additional phone number: (253)290-1963.

"Atlantic Tile & Granite did a great job on our kitchen countertops and island in our old house in 2013, so we had them to do the countertops and island for our newly built house (2023) as well. Once again, the outcome was nothing less than fantastic."

Scott W on August 2023


Avatar for DP Palmer Painting & Restoration

DP Palmer Painting & Restoration

9773 Arrowsmith Ave S
4.90(
67
)
Approved Pro

DP Palmer Painting & Restoration

9773 Arrowsmith Ave S
4.90(
67
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
397 local quotes requested

DP Palmer Painting & Restoration has been proudly offering design, restoration, and painting services in Seattle, Bellevue and Renton areas for many years. Our priority is the satisfaction of our clients, so we always take the time to ensure you are satisfied with the design of your space before starting any work. Our licensed, insured, and bonded painters and designers have years of experience in small and large painting projects in Seattle. They enjoy working closely with clients to ensure each project is perfect down to the last detail. When hiring DP Palmer Painting & Restoration for your interior and exterior painting, wall restoration and commercial design area painting needs, we ensure that the experience is completely hassle-free. We will personally empty the spaces to be painted with the utmost care, packaging fragile objects and doing all of the heavy lifting for you. You can rest assured that your floors and carpets will be well protected and that our professional painters will work diligently to ensure the quality of their work. We will never rush a residential or commercial painting job. We will use top quality paint and tools to complete the contract to your specifications. We will never leave any tools, stains or materials behind that you must clean up. We will always stand behind our work and satisfaction is 100% guaranteed. Additional contact name - Suzanne Hinton. Additional email - larrylawrencepal@gmail.com.

"Larry took on the incredibly ambitious project of renovating our 1914 Craftsman home, repainting the exterior, expanding the primary bathroom, refinishing floors, decking, stairwells, expanding and updating the kitchen, updating electrical and heating systems to modern standards, and so much more.The project is almost complete, but we were so excited that we wanted to write the review anyway! Throughout the process, Larry and his crew worked tirelessly to get things done, always focusing on quality and making sure we were happy with the work. Even partway through the project, neighbors were already commenting on how much they loved his color choices, and how much he and his crew cared about the project. Even given how large the project was, Larry and his crew tackled it head-on and got it done; he really brought out what made this home so special to us. We're really happy to have had the chance to work with Larry, and are really appreciating how wonderful our new home is thanks to him and his crew."

Chris G on March 2025

DP Palmer Painting & Restoration has been proudly offering design, restoration, and painting services in Seattle, Bellevue and Renton areas for many years. Our priority is the satisfaction of our clients, so we always take the time to ensure you are satisfied with the design of your space before starting any work. Our licensed, insured, and bonded painters and designers have years of experience in small and large painting projects in Seattle. They enjoy working closely with clients to ensure each project is perfect down to the last detail. When hiring DP Palmer Painting & Restoration for your interior and exterior painting, wall restoration and commercial design area painting needs, we ensure that the experience is completely hassle-free. We will personally empty the spaces to be painted with the utmost care, packaging fragile objects and doing all of the heavy lifting for you. You can rest assured that your floors and carpets will be well protected and that our professional painters will work diligently to ensure the quality of their work. We will never rush a residential or commercial painting job. We will use top quality paint and tools to complete the contract to your specifications. We will never leave any tools, stains or materials behind that you must clean up. We will always stand behind our work and satisfaction is 100% guaranteed. Additional contact name - Suzanne Hinton. Additional email - larrylawrencepal@gmail.com.

"Larry took on the incredibly ambitious project of renovating our 1914 Craftsman home, repainting the exterior, expanding the primary bathroom, refinishing floors, decking, stairwells, expanding and updating the kitchen, updating electrical and heating systems to modern standards, and so much more.The project is almost complete, but we were so excited that we wanted to write the review anyway! Throughout the process, Larry and his crew worked tirelessly to get things done, always focusing on quality and making sure we were happy with the work. Even partway through the project, neighbors were already commenting on how much they loved his color choices, and how much he and his crew cared about the project. Even given how large the project was, Larry and his crew tackled it head-on and got it done; he really brought out what made this home so special to us. We're really happy to have had the chance to work with Larry, and are really appreciating how wonderful our new home is thanks to him and his crew."

Chris G on March 2025


Avatar for Skyline Builders WA INC

Skyline Builders WA INC

123 Main St.
5.00(
8
)
Approved Pro

Skyline Builders WA INC

123 Main St.
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2042 local quotes requested

At Skyline Builders WA, we uphold the core values of honesty, reliability, and superior craftsmanship. Established in 2019, we specialize in transforming bathrooms and kitchens, bringing our expertise to Bellevue and the wider King County area as trusted general contractors. Licensed by the Washington State Board, our unwavering commitment to ensuring 100% customer satisfaction propels every project forward, guaranteeing a journey devoid of surprises or disappointments.

"Well, here is a contractor story you don’t always hear. My bathroom was remodeled late last year. Unfortunately, my tub started leaking into my neighbors condo. I texted Tony and heard back in 15 minutes. A crew was by the next day and it was fixed without questions and at no cost to me. This company has integrity, pride and excellent customer service. You will not be disappointed!!!!"

Rebecca H on May 2025

At Skyline Builders WA, we uphold the core values of honesty, reliability, and superior craftsmanship. Established in 2019, we specialize in transforming bathrooms and kitchens, bringing our expertise to Bellevue and the wider King County area as trusted general contractors. Licensed by the Washington State Board, our unwavering commitment to ensuring 100% customer satisfaction propels every project forward, guaranteeing a journey devoid of surprises or disappointments.

"Well, here is a contractor story you don’t always hear. My bathroom was remodeled late last year. Unfortunately, my tub started leaking into my neighbors condo. I texted Tony and heard back in 15 minutes. A crew was by the next day and it was fixed without questions and at no cost to me. This company has integrity, pride and excellent customer service. You will not be disappointed!!!!"

Rebecca H on May 2025


Avatar for Washington Energy Services

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro
Customers say: Super punctual
2815 local quotes requested
68 years of experience

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025

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Showing 1-10 of 950
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.