Heating, Cooling, Plumbing & Electrical Services in Mercer Island, WA
over 4503 reviews
Nestled between the shimmering waters of Lake Washington and Lake Sammamish, Mercer Island is a community that values home comfort, safety, and efficiency. For residents here, dependable heating, cooling, plumbing, and electrical services aren’t just conveniences—they’re vital to maintaining the peaceful, comfortable lifestyles this scenic island offers. Since 1976, Gene Johnson Plumbing & Heating has been proud to serve Mercer Island families with honest, expert care, becoming a trusted partner dedicated to keeping homes running smoothly year-round.
A Legacy of Local Expertise and Heartfelt Service
Our story began nearly five decades ago, rooted in family values and a commitment to quality craftsmanship. We understand Mercer Island’s unique blend of older homes and modern builds, so every service we provide is tailored with local conditions and your home’s specific needs in mind. Our technicians aren’t just skilled tradespeople — they’re your neighbors. Friendly, respectful, and knowledgeable, they listen closely and explain every step so you feel confident about the solutions we recommend.
Every job is an opportunity to extend the life of your home’s critical systems. Whether tuning up your furnace before winter or swapping out fixtures for better efficiency, we take pride in doing work that lasts and truly makes a difference in your daily comfort. Transparent pricing and respectful communication make us an easy choice for Mercer Island homeowners who want trustworthy, no-nonsense service.
Complete Comfort Solutions Under One Roof
Gene Johnson Plumbing & Heating offers a full suite of services that keep your home cozy, cool, and safe in all seasons:
- Heating Services: From furnace tune-ups to heat pump installations, our team ensures your heating system runs efficiently and reliably when the cold sets in.
- Cooling Services: We handle air conditioner repairs, maintenance, and smart thermostat installations, so your home stays refreshingly cool during the occasional Pacific Northwest heatwave.
- Plumbing Services: From leak detection and drain cleaning to water heater installs and sewer line repairs, our plumbing experts keep your water flowing and fixtures performing their best.
- Electrical Services: Electrical panel upgrades, interior and exterior lighting, surge protection, and EV charging station installations — all done safely and to code.
We pride ourselves on going beyond repairs. Our technicians help spot potential issues before they grow, offering tips and service plans to protect your investment and reduce costly surprises.
0%
Or low-monthly Payments
*For 60 months on select services.
FREE
Diagnostics And Consultations On HVAC Systems
*Diagnostic or repair services are not included. This is a no-obligation consultation for homeowners interested in upgrading or replacing their HVAC and/or heating systems. Offer applies to residential properties only and must be scheduled during normal business hours.
Plumbing Services That Protect and Perform
Water problems can quickly disrupt household routines and cause costly damage. Mercer Island’s blend of aging infrastructure and modern builds needs a plumbing partner who knows how to navigate it all. From minor drip repairs to full pipe replacements, Gene Johnson Plumbing & Heating handles it promptly and professionally.
Here’s the full list of services our expert Mercer Island plumbers can assist you with:
- Leak detection
- Leak Repair
- Burst or frozen pipes
- Drain cleaning
- French drains
- Sewer hook-ups
- Sewer line inspection
- Sewer line repair
- Hydrojetting
- Water heater services (tankless included)
- Sewer replacement
- Fixture installation (faucets, toilets, sinks, you name it)
- Repiping
- Water line repair and installation
- Gas line services
- Emergency plumbing
Whether you’re dealing with aging pipes, stubborn clogs, or sudden leaks, having a skilled plumbing team makes all the difference. We help protect your home, your water lines, and your peace of mind with solutions built to last.
Heating Tailored to Mercer Island’s Climate
Mercer Island winters are damp and chilly, requiring heating systems that can deliver consistent warmth without breaking the bank. That’s why regular furnace maintenance is essential — ensuring clean burners, properly tuned components, and efficient fuel use. This care extends your system’s life and keeps energy bills manageable.
Here’s our full list of heating services in Mercer Island:
- Furnace repair
- Furnace installation
- Furnace maintenance
- Heat pump repair
- Heat pump installation
- Heat pump maintenance
- Ductless mini splits (install, repair, maintenance)
- Radiant heating
With the right heating support, your home stays comfortable no matter how damp or chilly the season gets. Our team keeps your equipment reliable, efficient, and ready for winter, giving you steady warmth and fewer surprises along the way.
Cooling with Comfort and Confidence
While our summers tend to be mild, occasional warm spells make a dependable cooling system a luxury worth investing in. We install and repair central air conditioners, helping your system run quietly and effectively.
- Air conditioning installation
- Air conditioning repair
- Air conditioning maintenance
- Heat pump services (repair, installation, and maintenance)
- Smart thermostat installation
- Ductless systems
- Indoor air quality solutions
A dependable cooling system makes warm spells easy to handle, and our experts ensure yours is always prepared. From fine-tuning to full replacements, we keep your home breezy, comfortable, and efficient whenever the temperatures rise.
Electrical Safety and Modern Convenience
Electrical systems are the backbone of modern living — powering everything in your home from everyday electronics to life-saving appliances. We help Mercer Island residents keep their systems up to date and safe with electrical panel upgrades, preventing overloads that can lead to outages or hazards.
If you’re in need of professional electrical services in Mercer Island, here’s what you can expect from our experts:
- Electrical panel upgrades
- Interior lighting
- Exterior lighting
- Whole home surge protection
- Backup generators
- EV charger installation
- Electrical troubleshooting
- Electrical installations
Safe, modern electrical systems keep your home running smoothly day and night. From upgrades to troubleshooting, our licensed electricians deliver dependable results that protect your property and support every device and system you rely on.
Why Mercer Island Chooses Gene Johnson Plumbing & Heating
What truly sets us apart is our local focus and holistic approach. We know Mercer Island homes intimately — their quirks, challenges, and history — and that makes all the difference in delivering lasting solutions.
- Responsive, friendly technicians who arrive on-time and get the job done right.
- Honest upfront pricing with no surprises, so you can budget confidently.
- Extended warranties and service plans designed to keep your systems running smoothly year-round.
- A commitment to ongoing education, empowering you to care for your home and plan wisely.
We take the stress out of home repairs and maintenance, making it easy to enjoy the comfort and convenience you deserve.
Become Part of the Gene Johnson Family
Imagine living in a home where your heating system purrs through winter’s chill, your cooling keeps summer heat at bay, plumbing flows flawlessly, and your electrical setup is safe and modern. That’s what we build for every Mercer Island customer — one visit at a time.
Join Gene’s Club to access exclusive benefits, including:
- Annual furnace tune-ups
- Discounts on HVAC repairs and equipment replacements
- Priority scheduling and waived dispatch fees
- Warranty coverage that gives you peace of mind
There’s never been a better time to partner with Mercer Island’s trusted home comfort experts. When you want service that’s thorough, reliable, and personal, call Gene Johnson Plumbing & Heating. We also serve the neighboring cities and communities, including Bellevue, Kirkland, Bothell, Lake Forest Park, Shoreline, all the way to West Seattle, and beyond. Let’s keep your home comfortable, safe, and efficient — just as it should be.
Ready to experience the Gene Johnson difference? Reach out today and discover why your neighbors have trusted us for nearly 50 years. Your home comfort is our priority, and we’re here whenever you need us.
QUALITY SERVICE
Within Your Budget
The best plumbing, cooling, heating, and electrical services shouldn’t have to break the bank. That’s why we are happy to provide our customers with opportunities to save on their next service with us. Our current online deals are updated periodically, so there is something for everyone, whether you are a first-time customer or a long-time loyalist.
Here are some benefits of trusting Gene Johnson with your HVAC, Plumbing, and Electrical needs.
- Best value service in Seattle
- Always on-time arrival
- No mess left after a job
- Friendly team that truly cares about your safety and comfort
- Fixed right guarantee
- Upfront pricing
- Follow up calls to ensure your peace of mind
- Range of service options- no ultimatums!
Total reviews: 4503 | Average rating: 4.8
Matthew Hilliard
Kristine Castleman
Excellent service! Fast and well done! Hugo is very friendly and thoughtful. He’s takes the time to explain everything and make sure we have no unanswered questions.
Jim Galiardi
These guys are awesome. After a horrible experience with SW Plumbing that don’t seem to know anything about tankless heaters except to quote replacements without troubleshooting, I called Gene Johnson. They got out that day. Derek Solberg the technician, obviously knew his craft and was able to quickly diagnose and explain the issue. As it turns out the unit did need replacing, and Derek was able to confirm why. He then replaced it on the spot in a few hours for $2-$4k less than the quotes I got from two different SW ‘technicians’ over the previous two days. This is the customer experience, we should be able to expect. I wouldn’t call anyone else.
lowerlightbebeaming
Greg and Rory were skilled in their work and they were very professional and customer oriented. Highly recommended.
Michael Corleone
Once again. Noah is a fantastic plumber – he does a high quality job and communicates well. He’s a hard worker and gets the job done right. I’m so happy I found Gene Johnson and Noah for my plumbing needs.
Otto Orange
Professional, Helpful, and Friendly Service! I greatly appreciate the service we received from Jaren who helped solve our plumbing/sewer line backup issues. After diagnosing the problem, he explained the various options available and was both friendly and informative. I’ve been very satisfied with my experience using Gene Johnson Plumbing and would highly recommend them.
Emma Vetter
We asked for someone to come out to get us a water heater replacement quote. They came same day, examined the water heater, and identified that it only needed a part replacement, not the entire unit, saving us literally thousands. The heater was fixed same day, and Branson Carr, our technician was informative, professional, courteous, and a trooper abour cats bugging him while he worked on the estimate.
B Prater
Mark Ochoa was extremely friendly, helpful and professional. He cleared our kitchen drain in a timely manner. I highly recommend Mark.
Jon Kay
Great work by Greg and Rory! Thank you so much!!
cynthia faw
I experienced a minor Saturday night emergency when one of my bathroom faucets began leaking—so I turned off its shut-off valve. A bit later I discovered the shut-off valve was leaking rather dramatically, soaking a rug and almost reaching my hardwood den floor. I cleaned up the soggy mess in my vanity cabinet and placed a bucket under the leaking valve, while turning off my house water supply. I was unable to use water Sunday, but as I shopped for a new faucet set I called Gene Johnson Plumbing’s emergency number.
My call to Gene Johnson Plumbing was professionally answered and I conveniently scheduled my repair appointment for Monday, allowing me a day to procure the faucet set. I am very particular about thee aesthetics of fittings, so even though this was unexpected, I wanted to select a set that I really liked.
Monday I received a call as promised from the company’s experienced plumber Steven Fritz, letting me know he was on his way. The company had messaged me a photo of Steven along with his credentials, which I appreciated. After meeting him, I was very impressed by Steven’s professionalism and clear explanations of his approach to the work.
My old sink valves were soon replaced with new shut-offs, and my lovely new faucet set was efficiently installed. Overall a great experience, allowing me to enjoy some lemonade out of a lemon of a plumbing problem!
Kay Buccola
Mike was amazing. He came out on THANKSGIVING DAY!! He had to thread his way through 20+ guests to service our much-needed but malfunctioning dishwasher. He was so gracious about the holiday complications. He saved our day!
Brad Copenhaver
Fixed my garbage disposal and taught me how to maintain it.
Tiffany Potter
Mark O did an outstanding job with his plumbing Inspection today. Very informative and thorough
Jack V
Mark was a pro. He went through all the options for repair and replacement and worked up quotes for each. I’m really happy with the install and overall experience.
michelle manis
Noah came out today and replaced all the plumbing under my bathroom sink. He was very friendly and professional, and he did a great job, and he was fast. We will gladly use their services again.
Kelsey Robinson
Jaren was great! Fixed our clog in record speed and even gave our pups some extra pets! I’ll be using Gene Johnson again for sure!
Lea Fronterhouse
Gene Johnson is always our go to! Timely, friendly and always educational. Stephen was our tech this time around and he was superb. Love them.
Kendra Johnson
Mark Ochoa was very efficient and helpful unclogging a stubborn kitchen sink. He kept me informed on what the issue was (a clog that had moved outside of my house further into the line) and how things were proceeding. He also provided education on how I could to try to prevent future issues and answered my questions thoroughly. Would definitely recommend him to others!
Rodolph Rowe
Hugo was excellent, on time, friendly, helpful.
Chris Haskins
We had a great experience with Gene Johnson Plumbing and Jaren in particular. He was knowledgeable, kind, and went above and beyond to make sure the job was done right. Everything was explained up front and we were offered multiple options. In the end the work was expertly done and we’re very happy, would definitely recommend.