HVAC Services in Bellevue, WA
Expert Heating, Cooling & HVAC Services for Bellevue Residents
Bellevue HVAC Services
HVAC Experts in Bellevue Since 1977!
At NW Mechanical, we've served Bellevue homeowners since 1977 — delivering honest, expert HVAC service across the Eastside. Bellevue spans 1950s ramblers in Lake Hills and Newport, newer townhomes around Crossroads, and downtown condos where outdoor equipment placement is tightly constrained. Each needs a different answer, so we size and design to the house rather than to the square footage.
Whether you need furnace repair before the first freeze, an AC tune-up before summer heats up, or a high-efficiency heat pump installation, we have you covered.
Give NW Mechanical a call or connect with us online today to discuss your heating and cooling needs with our experienced Bellevue HVAC technicians.
Our HVAC Services
Heater Repair
Ductless Heat Pumps
Geothermal
Radiant Heat
Water Heaters
Boiler Repair
HVAC Services
AC Repair
AC Installation &
Replacement
Bellevue is the largest and the most varied market on the Eastside. A downtown condo with no ductwork and a 1960s rambler in Lake Hills are two different jobs, and a hillside house in Somerset is a third. What they have in common is two Bellevue rules that decide more about an outdoor unit installation here than the equipment does: where the code says the unit may sit, and how loud it is allowed to be at the property line.
Bellevue is also one of the Washington cities that runs its own electrical inspection program rather than leaving it to the state. This page covers all of that, the permits, the rebates and what we work on most. To talk it through, call (206) 900-9231.
What we do most in Bellevue
Each service has its own page with the detail on equipment, sizing and what the work involves.
Heat pump installation
The job where Bellevue's placement rules matter most, because the outdoor unit has to land somewhere the code allows and stay within the noise limit at the line. On a narrow lot that is a design question we settle before quoting, not after.
Also: Air to water heat pumps
Ductless and mini split systems
The answer downtown and across Bel-Red, where condos and townhomes have no ductwork and often no ground level of their own. Where the condenser can be mounted, and what the building allows, usually decides the design before anything technical does.
Also: Mini split repair
Air conditioning
Repair, replacement and first time installations. A great deal of Bellevue's mid century housing was built for heating only, so adding cooling means looking at the returns and the duct capacity rather than just bolting on a condenser.
Also: AC repair
Furnace repair and replacement
Repair, replacement and annual service on gas and electric furnaces. Bellevue treats a like for like furnace swap as permitted work, so this is not a job to have done informally.
Also: All heating
Duct and distribution work
On the split levels and hillside houses the far rooms never keep up, and the cause is the duct run and the returns rather than the size of the equipment. Zoning is often cheaper than upsizing.
Also: Indoor air quality · Ventilation
Water heaters
Tank, tankless and heat pump water heaters. Bellevue names a like for like gas water heater replacement as permitted work, and a switch to a heat pump water heater is a bigger change because the electrical and the drainage both move.
Also: Heat pump water heaters · Tankless
Boilers and radiant heat
Service, repair and replacement on hydronic systems, which turn up in Bellevue's custom builds and in some of the older west side houses. Each zone gets its own loop, which suits a house that never balanced on forced air.
Also: Radiant heat
Geothermal
Ground source heat pumps need lot area for the loop field, which rules out most Bellevue lots but not the larger properties toward Bridle Trails and Cougar Mountain.
Also: Heat pump options
Not listed? See every service we offer.
Where Bellevue lets you put the outdoor unit
This is the detail that catches people out, and it is written into Bellevue's own zoning requirements rather than buried in a national code. For a new single family home the City directs you to locate mechanical equipment in the rear yard, placed no less than five feet from any property line, under Land Use Code section 20.20.525.
Equipment placed in a side yard outside the minimum side structure setback must include sound screening to reduce noise impacts. And separately from where it sits, it has to meet Bellevue's noise limits under City Code Title 9.18: broadly 45 dBA at night and 55 dBA during the day, measured at the receiving property.
On a wide lot none of this is a constraint. On the narrow lots in West Bellevue, Enatai and the older plats it decides the job, because the obvious spot beside the house is often the one place the unit cannot go. It is also why a quiet inverter unit can be worth the difference in price here rather than simply being a nicer specification: the night limit is the binding one, and a unit that clears it at the line is the unit that gets to stay where you want it.
Permits for HVAC work in Bellevue
| Permit authority | City of Bellevue Development Services. |
|---|---|
| Which portal | Bellevue takes applications through the regional MyBuildingPermit portal, the same one used by Kirkland, Bothell, Issaquah, Sammamish, Mercer Island and unincorporated King County. Redmond and Woodinville are the two nearby cities that run their own instead. |
| What needs a permit | The City names "replacing like-for-like HVAC equipment, such as a gas water heater, furnace or heat pump", along with extending or replacing duct work and installing or modifying a gas line. Like for like is still permitted work here, which surprises people. |
| One real exemption | Bellevue exempts self contained refrigeration equipment with less than 10 pounds of refrigerant and under 1 HP, where no refrigerant line welding is involved. It is narrower than it sounds and does not cover a normal residential heat pump or ductless install. |
| How fast | The City states that mechanical permits not requiring plan review can be issued the same day, and adds that those permits still require inspections. Same day issue is not the same as no inspection, and a job closed out without one is an open permit on your record. |
| Electrical permit | Bellevue is one of the Washington cities that issues its own electrical permits and does its own electrical inspections, so state Labor & Industries does not inspect inside the city limits. It means one authority for the whole job rather than two. We hold a Washington electrical contractor licence, so the electrical side comes from us. |
| Utility | Puget Sound Energy supplies gas and electricity across Bellevue, which is what determines the rebates below. |
We pull the permits on our own work and book the inspections. If one quote is noticeably cheaper than the others, it is worth asking whether permitting is included, because an unpermitted install is the kind of thing that surfaces later during a sale.
Rebates in Bellevue
Bellevue is Puget Sound Energy territory. The headline $1,500 conversion rebate requires your existing primary heat to be electric resistance, so a gas furnace does not qualify for it. A separate electrification rebate worth up to $4,000 covers moderate income customers converting from gas heating to an all electric heat pump.
PSE only pays when the installing contractor is a Recommended Energy Professional or Trade Ally, and NW Mechanical holds PSE Recommended Energy Professional status, so the work we install qualifies.
Our heat pump rebates page sets out every program side by side, including the conditions that disqualify people most often.
Where we work in Bellevue
Bellevue covers more housing types than anywhere else on the Eastside, and the type decides the approach.
Downtown and Bel-Red
Condos, apartments and townhomes, frequently with no ductwork and no private ground. Ductless is the usual answer and where the outdoor unit can be mounted is the first question, ahead of the equipment.
West Bellevue, Enatai and Beaux Arts
Older housing on narrow lots, sometimes heavily remodelled. This is where the five foot rule and the night noise limit do the most to decide where a unit goes.
Lake Hills, Crossroads and Newport
Mid century ramblers and split levels with existing ductwork, usually built for heating only. Adding cooling is a returns and duct capacity question first.
Somerset, Cougar Mountain and Factoria
Hillside and multi level houses where the far rooms never keep up. Zoning and distribution beat extra capacity almost every time.
We also cover the rest of the Eastside and Seattle. See Kirkland, Redmond, Mercer Island, Medina and the Points and all service areas.
Bellevue HVAC questions we get asked
Can the heat pump go beside the house where the old AC was?
Sometimes, but not automatically. Bellevue directs mechanical equipment on a new single family home to the rear yard and at least five feet off any property line, and a side yard position outside the minimum side structure setback needs sound screening. We work out where it can legally sit before we price the job.
My neighbour is close. Will the unit be too loud?
The test is Bellevue's noise limit at the receiving property, roughly 45 dBA at night and 55 during the day. Night is the binding number. A variable speed unit sited sensibly normally clears it comfortably; a cheap single stage unit against a shared fence is where complaints come from.
Do I need a permit just to swap my furnace for the same thing?
Yes. Bellevue names like for like HVAC replacement, including a gas water heater, furnace or heat pump, as permitted work. The permit can often be issued the same day when no plan review is needed, but it still requires an inspection.
Who does the electrical inspection in Bellevue?
The City does. Bellevue runs its own electrical permitting and inspection program, so Labor & Industries is not involved inside the city limits. It makes scheduling simpler than in the cities where the two sit with different agencies.
Can I put a ductless system in a downtown condo?
Usually yes, and the constraint is rarely technical. It is where the outdoor unit is allowed to go and what the building or HOA permits, which is worth settling before anyone quotes equipment.
Talk to us about your Bellevue home. We will confirm where the code lets the equipment sit, whether the noise limit narrows the options, what the permit involves and which rebate the house actually qualifies for.
Call (206) 900-9231 or request an estimate.
Equipment placement, the five foot setback and the sound screening requirement from the City of Bellevue's mechanical equipment zoning requirements, citing Land Use Code 20.20.525 and noise limits under City Code Title 9.18. Permit scope, the refrigerant exemption and same day issue from the City's mechanical permits page. Bellevue's status as a city that issues its own electrical permits and inspections from Washington Labor & Industries. Participating jurisdictions for the regional portal from MyBuildingPermit. Rebate amounts and conditions from Puget Sound Energy. Code requirements, noise limits and rebate amounts change, so confirm current rules with the City and PSE before relying on them. Last reviewed September 2026.
Why Choose NW Mechanical to Handle Your Bellevue HVAC Needs?
At NW Mechanical, we have been providing top-notch products and exceptional HVAC service at reasonable prices in Bellevue since 1977.
Here are a few reasons why you should choose us:
- Experience: With over four decades of industry expertise, we know what it takes to deliver quality results.
- Reliability: We offer 24/7 emergency services, which means you can count on us to be by your side throughout Bellevue whenever you need us.
- Customer satisfaction: Our commitment to exceeding customer expectations has earned us a stellar reputation in Bellevue.
- Affordable pricing: While we offer reasonable prices, we never compromise on the quality of our products and services.
- Personalized solutions: We understand that every Bellevue home is unique, so we tailor services to suit your specific needs.
When it comes to your HVAC needs, make the right choice by choosing NW Mechanical.
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For fast, reliable heating, cooling and HVAC service across Seattle and the Greater Eastside, contact NW Mechanical, where your comfort comes first. Our highly trained technicians handle everything—from simple tune-ups and repairs to full system replacements—for any brand or model.
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Licensed, Bonded and Insured in Bellevue
Each license can be looked up individually on the Washington State L&I contractor register.
Mechanical permits here are issued by City of Bellevue Development Services, and we pull them for the work we do. Natural gas and electricity are supplied by Puget Sound Energy.
If you ever smell gas, leave the building first and call Puget Sound Energy on 1-888-225-5773 before you call us.
