Heating, Cooling, Plumbing & Electrical Services in Mercer Island, WA
over 3,900 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.
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.
Heat pumps are increasingly popular here, thanks to their ability to both heat and cool efficiently. Gene Johnson’s experts install and service heat pumps to keep your home comfortable year-round. For homes lacking ductwork, we offer ductless mini-split systems that provide zoned comfort — so every room feels just right, without the expense of major renovations.
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.
Beyond cool air, we focus on indoor air quality too. Our in-duct air purifiers catch allergens and contaminants, improving your home’s atmosphere during all seasons. Pair that with our smart thermostat upgrades, and Mercer Island homeowners gain precise control to balance comfort with energy savings.
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.
Routine drain cleaning prevents clogs that lead to backups or worse. Our water heater services cover both traditional and tankless systems — ensuring you never have to worry about your morning shower or washing machine again. Fixture upgrades, leak detection, and repiping round out our plumbing expertise, always with attention to detail and respect for your home.
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.
Lighting installations—both indoors and outdoors—combine function with style, creating inviting spaces. As EV adoption grows, we’re here to offer safe, convenient home charging station installations tailored to your needs.
Don’t underestimate the importance of whole-home surge protection — sudden voltage spikes can fry electronics or shorten their lifespan. Our experts install surge protectors that shield your tech investments and give you peace of mind.
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. 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: 587 | Average rating: 4.7
Sam Miller
Joe Kennedy
Hugo did a great job! Professional and timely. Ask for him for your plumbing needs!
Stefan Solomon
Taras did a great job checking our plumbing system for potential issues as part of our maintenance plan. He answered all our questions. Very professional. Thank you
Elaine S
David Sanchez, Plumbing Technician, not only is highly skilled, but also superb at analyzing plumbing issues and taking the steps to resolve them. He cares greatly about ensuring the customer’s concerns are addressed and welcomes questions. David cares about his customers. Additionally, he cares about maintaining high standards of practice and is a real asset to the Gene Johnson Company.
In order to properly address my plumbing issue, which included a leak, he assessed the problem and installed new piping. Because I am interested in my house’s plumbing, I enjoyed learning about each step of the repair process. He was very thorough, and got my permission for the additional work. When he was done with the job, he carefully cleaned everything up. I will definitely call the Gene Johnson Company for any future work that may arise.
Justin McCullum
Great experience!
Andrea Harris
Brooks and Blake did an excellent job replacing our HVAC system today! They were professional, thorough and courteous. They even went above and beyond by getting rid of a hornets nest for me! Most importantly, my 3 german shepherd pups loved them! Highly recommend!
Robert Svendby
Very nice and courteous. Excellent communication
Ariana Lau
Your service technician was absolutely delightful. Jaren was very polite, considerate, and kind. He was able to explain things well enough for me to understand and convey the issues to others. He even got a giant wasp out of my house for me. I am allergic and very thankful he was there. Quite physically, a life saver!
I will recommend him to anyone looking.
Konstantin Klemmer
Friendly and quick!
Richard Lee
Hugo did a great job. Fast and responsive and educational
Heather Kelly
LOVED the quick service and amazing communication with Hugo. He was so knowledgeable and friendly, helped me identify an easy fix and took care of it within the week. I appreciated his initiative to research solutions and walk me through them. I wish every service person were so diligent and thoughtful!
Vince L.
The technician is very knowledgeable, he do good work. He is very knowledgeable and very patience in explaining tech things to people who never done plumbing before. Gene Johnson did hire a great asset, and I will like to recommend Gene Johnson to anyone who needs their services. Thank you Gene Johnson and Thank You Hugo for the work that you did to the property!
Michael Rill
Had a great experience with Hugo. He was fast, friendly, and clearly knew what he was doing. He fixed our toilet quickly and left everything tidy. Super professional – highly recommend if you need a reliable plumber.
Kyle Cooley
Hugo was excellent! He did a great job of explaining our options, going above and beyond, and working with our budget.
Phil Bytheway
Mark Ochoa did a great job fixing our toilet issue, explained all the options and membership info. Would definitely want to have him come by again if we have an issue.
Jordan Donald
Hugo was the best – in and out quickly and did an amazing job!
James Lazar
Great work, very personable and educational.
Amir
Steven was very knowledgeable. Did minor gas work at my unit, I would use Gene Johnson again.
Kimberly Burt
Steven did a fabulous job thank you!
Kendra Anderson
David is absolutely fantastic! From the moment he arrived—following a water heater explosion that left us with four inches of flooding—he was professional, calm, and approachable. He took the time to walk us through every step of the process, ensuring we felt informed and confident in our options and next steps. His customer service is unmatched, and I’m incredibly grateful for his expertise, craftsmanship, and kindness.