Preferred HVAC Contractor Of The Year 2023-2024
Serving King & Snohomish Counties Since 1968

Comfort You Can
Count On
— Since 1968

No subcontractors. No surprises. No shortcuts. Licensed HVAC and electrical experts who stand behind every installation with a 30-day money-back guarantee and up to 10 years of coverage.

4.9 Stars · 399 Reviews
BBB A+ Accredited
Contractor of the Year 2023–24
Why Evergreen

The Evergreen Standard

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BBB A+ Accredited

Accredited with the Better Business Bureau's highest rating — earned through consistent integrity, transparent practices, and genuine commitment to customer satisfaction.

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2023–24 Contractor of the Year

Recognized as Contractor of the Year for 2023–24, reflecting the quality of our work and the confidence our customers and industry peers place in us.

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Mitsubishi Preferred Diamond Contractor

Elite Diamond Contractor status with Mitsubishi Electric — factory-level training, premium installation standards, and exclusive manufacturer support.

4.9 Stars — 399 Google Reviews

Consistently rated 4.9 out of 5 by hundreds of verified customers across King and Snohomish Counties. Real results, real people.

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Licensed, Bonded & Insured

Every technician is fully licensed, bonded, and insured — giving you complete protection and confidence on every service call and installation.

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Proudly Local Since 1968

Over five decades of serving Pacific Northwest families and businesses. Our longevity is not just history — it is proof that we do things right.

Our Guarantees

Backed By The Strongest Guarantee In The Business

Most HVAC contractors make promises they don't keep. We built our entire business model around accountability — starting with our 30-day money-back guarantee and ending never, because we support you for the life of your system.

See Our Guarantees
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30-Day Money-Back Guarantee

Love it or leave it — every residential HVAC installation comes with a full 30-day satisfaction guarantee. No fine print, no hassle, no arguments.

2-Year No-Breakdown Labor Guarantee

We back every installation with a 2-year no-breakdown labor guarantee — a standard most competitors won't come close to matching.

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No Subcontractors. Ever.

Every technician who enters your home is a trained, licensed Evergreen employee. Full accountability, start to finish.

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Transparent, Itemized Proposals

You receive a fully detailed written proposal breaking down labor, electrical, and equipment costs before any work begins. No vague lump-sum estimates.

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Clean Home & Respect Guarantee

We leave your home as clean as we found it — or cleaner. Work areas are fully wiped down and all debris removed before we leave.

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Up to 10-Year Parts & Labor Warranty

Choose from extended warranty options covering parts and labor for up to 10 years, giving you long-term protection and total peace of mind.

What We Do

Expert Services For Every Need

Residential Heating
Heating

Furnace & Heating Installation

From unit selection tailored to your home's size and budget to fully permit-inspected installation — our licensed technicians handle every detail and leave no mess behind.

Repair

Furnace Repair

When your heat fails, we respond fast. Our technicians are experienced with all makes and models and arrive prepared to get your system back up and running.

Residential HVAC Service
Cooling

Air Conditioning Installation & Repair

Whether you need a new system designed for your home or a failing unit diagnosed and repaired, our AC experts deliver reliable cooling solutions built to last.

Ductless

Ductless Mini-Split Systems

As a Mitsubishi Electric Preferred Diamond Contractor, we design and install ductless systems that deliver precise, zoned comfort without requiring existing ductwork.

Electrical contractor Seattle
Electrical

Electrical Services

Our licensed electricians serve residential and commercial customers across the Puget Sound area — from panel upgrades to full electrical installations.

Commercial HVAC & Electric
Commercial

Commercial HVAC

Certified union-trained technicians bring professional-grade HVAC solutions to light commercial properties across King and Snohomish Counties.

Maintenance

Routine HVAC Maintenance

Annual and bi-annual maintenance visits keep your system running efficiently, extend its lifespan, lower energy costs, and prevent costly breakdowns before they happen.

HVAC contractor of the year 2023-2024
55+
Years of Service
Evergreen State Heat & AC location
Our Story

Five Decades of Doing It Right

Evergreen State Heat & AC has been keeping Pacific Northwest families and businesses comfortable since 1968. What started as a commitment to honest, expert service has grown into one of the most trusted HVAC and electrical companies in King and Snohomish Counties — and we have never once compromised on the standards that built our reputation.

We built our business on a simple belief: the way most HVAC contractors operate is not good enough. That is why we do things differently. Every project starts with full transparency — a detailed proposal, honest options, and a sales rep who discloses risks rather than glossing over them.

From residential furnace replacements to commercial electrical projects across the Puget Sound area, our BBB A+ accredited team brings the same care and accountability to every job. As a Mitsubishi Electric Preferred Diamond Contractor and 2023–24 Contractor of the Year, we are proud of what those recognitions represent — but what matters most is simpler: that our customers trust us enough to call us back, and to send their friends.

No Subcontractors
100% Evergreen employees
30-Day Guarantee
Love it or full refund
24/7 HVAC Service
Emergency response
Full Training
2-week post-install walkthrough
How We Work

The Evergreen Process

Five steps designed around one goal: your complete confidence and total satisfaction.

01

Get an Instant Quote Online

Use our Instant Quote tool to see new system pricing in minutes — no salesperson, no pressure. Transparent costs are available to you before the first conversation.

02

Full Disclosure Sales Meeting

Your Evergreen rep walks through all options, risks, and recommendations openly. You receive a fully itemized written proposal covering labor, electrical, and equipment costs.

03

Expert Installation by Evergreen Employees

Our own licensed, bonded technicians — never subcontractors — complete a thorough installation with a full layout walkthrough so you know exactly what to expect.

04

Inspection, Clean-Up & Quality Sign-Off

Every installation includes a permit inspection and a comprehensive quality control review. We wipe down all work areas and remove all debris before we consider the job done.

05

Training, Walkthrough & Lifetime Support

Within two weeks of installation, we return for a complete training session on your new system. We remain your partner — for questions, maintenance, and anything else — for the life of your equipment.

What Customers Say

Real Reviews. Real Results.

★★★★★ 4.9 out of 5 — 399 Google Reviews
Jay Pulliam
Jay Pulliam
★★★★★

"Evergreen State Heat & AC came in and did an audit, removed all the superfluous devices, got the Hayes furnace under thermostat control, and life has been great ever since. Smart and willing to take on challenges, I heartily recommend them for commercial buildings of any age."

March 2025 · Commercial Building
C
Claudia Augustine
★★★★★

"We've used Evergreen State Heat & AC for a few years now for our regular furnace maintenance. They are always able to schedule us promptly and their service technicians are responsible, friendly, quick and thorough. I appreciate their professionalism and community spirit."

March 2025 · Annual Maintenance
Marie Koontz
Marie Koontz
★★★★★

"Professional and friendly as always. I've used Evergreen State Heat & AC for years for annual service plus occasional repairs on my very old furnace. Always happy with the service and results, thank you!!"

March 2025 · Furnace Service
L
Lisa B.
★★★★★

"Evergreen is hands down the best company to do business with. Professional, knowledgeable, and friendly beginning to end. Fairly priced, too. I use them to maintain my 20 year old furnace and I will be using them for all my electrical needs in the future. 5 stars all the way."

Common Questions

Frequently Asked Questions

Never. Every technician and electrician who works in your home or business is a trained, licensed Evergreen employee. This ensures consistent quality and full accountability on every job.

Every residential HVAC installation comes with our 30-day 100% love-it-or-leave-it money-back guarantee. If you are not fully satisfied within 30 days, we make it right — no arguments and no fine print.

We back every installation with a 2-year no-breakdown labor guarantee. We also offer extended warranty packages covering parts and labor for up to 10 years — options we discuss with you openly before you commit.

Evergreen Eastside Heat & AC serves King County, Evergreen State Heat & AC serves Snohomish County, and our Electrical Services division serves the greater Puget Sound area.

Yes. Our Instant Quote tool lets you see system pricing online without speaking to a salesperson. When you're ready to move forward, you receive a fully itemized written proposal — no lump-sum guesswork.

We are a Mitsubishi Electric Preferred Diamond Contractor and also install and service Trane equipment. Our technicians are experienced with all major brands and models across all equipment types.

Yes, special HVAC financing options are available. Ask about current financing programs when you request your quote — we can help make a new system fit your budget.

Our offices are open Monday through Friday, 7:00 AM to 4:00 PM. We also offer 24/7 HVAC service for urgent heating and cooling needs — because comfort emergencies do not follow business hours.

Ready to Get Started?

Stop Settling.
Demand Better.

Get your instant quote today — no salesperson, no pressure. Or call us now and speak directly with one of our licensed technicians.

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King County
425-968-8702
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Snohomish County
425-252-3114
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Email Us
info@essmwa.com
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Office Hours
Mon–Fri 7:00–16:00
24/7 HVAC Emergency

8431 Maltby Rd, Seattle, WA

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