ONESTOP Heating Cooling Electric
Your ONE STOP for Total Comfort
Trusted HVAC & electrical experts who get the job done right the first time. Serving Mountlake Terrace & the surrounding King County & Snohomish County Areas Since 2022
Serving Customers in Mountlake Terrace with Expert Care
That’s why ONESTOP is here—to make those problems easier to solve. We’re a local HVAC and electrical company serving Mountlake Terrace and surrounding areas with licensed expertise, dependable service, and a straightforward approach. Whether you're installing a new heat pump or rewiring part of your home, we bring technical know-how and real accountability to every job.
We handle everything in-house—from the first estimate to the final check—so you’re never left chasing subcontractors or sitting around waiting. Our team is trained on trusted equipment lines like Mitsubishi Electric and American Standard, and we back our work with strong warranties and honest communication.
Serving Mountlake Terrace, and nearby communities.
We’ve built our name on reliable results and respectful service.
Quality Work from People Who Care
At ONESTOP, we treat every job like it’s happening in our own home. We don’t take shortcuts or upsell you on things you don’t need. Our technicians are licensed, insured, and committed to doing the job right—whether we’re troubleshooting a tripped breaker or replacing a worn-out furnace. We make recommendations based on what works, not what’s convenient.
Why choose us ?
Customers stick with us because they know what to expect: clear timelines, upfront pricing, and no loose ends. We also offer financing options for larger projects, and our membership plans give you added peace of mind with extended parts warranties—5 years on installed parts and up to 10 years on new system installs. Weekend scheduling and same-day availability are part of what makes us easy to work with. When you need real help, we make it happen.
Fast, Reliable Service 24/7
From emergencies to routine calls, our team is always ready, day or night, to restore your comfort quickly.
Financing & Membership Plans
We offer flexible financing and value-packed memberships to keep your home running smoothly all year.
Licensed, Bonded & Insured
Your home is in safe hands with fully certified technicians and reliable, code-compliant service.
Locally Owned & Operated
Serving Snohomish and King County with trusted, community-focused HVAC and electrical expertise.
Your One-Stop Shop for HVAC and Electrical Services
Instead of juggling two or three contractors, you can count on one team to handle it all. ONESTOP is your one-stop shop for heating, cooling, and electrical service across Mountlake Terrace and beyond. We install high-efficiency mini-splits, troubleshoot AC breakdowns, upgrade panels, and handle everything in between. No bouncing between departments, no confusion—just one team with the skill to get it done.
From new installs to last-minute repairs, we keep homes safe, comfortable, and powered up all year long. Our goal is simple: do the job right and leave you with systems you don’t have to second-guess.
"I will definitely be using their services again in the future."
"I recently hired Onestop to install a new AC unit in my rental property in Mountlake Terrace, and I couldn't be more pleased with the service I received. From start to finish, the team impressed me with their professionalism, expertise, and attention to detail."
- Danielle B.
"They were on time, nice, kind, honest, did their job efficiently and well."
"Adam and his installers arrived the next morning, on time! The crew did a great job and were done sooner than I'd expected. They not only installed my new Trane furnace, but they also made the whole area look better and cleaner."
- Carrie S.
"They went the extra mile - no customer could ask for more!"
"My new HVAC system works perfectly, and their teamwork was a pleasure to behold, even in hot July weather. The best communication and customer service anyone could hope for. They all really are five stars!"
- Joy A.
Ready to get started?
Schedule a free estimate with us today
