Get Your Estimate
At NW Mechanical, we're always ready to take your call! Give us a call at (206) 900-9231 or fill out the form below to contact one of our team members.
"*" indicates required fields
Heating, Cooling and Boiler Service Areas in Seattle, the Eastside and South Snohomish
NW Mechanical is based in Woodinville and works across Seattle, the Greater Eastside and the south end of Snohomish County. Most of the housing here went up on the assumption the region would never need air conditioning. Recent summers ended that, and a lot of our work now is fitting cooling into homes that were never built for it, usually with a ductless system or a heat pump conversion rather than a bolt-on AC.
We also do the work a lot of HVAC shops send elsewhere: boilers, radiant floor heating, water heaters and tankless. The job changes from city to city. Permits are issued locally, the electric utility changes twice across our area, and the housing stock is different in every town. Pick your city below to see what we run into there.
BASED IN
Woodinville, WA
WORKING HERE SINCE
1977
PUGET SOUND ENERGY
Recommended Energy Professional
LICENSING
Licensed, bonded and insured
The Eastside
Woodinville
Puget Sound Energy
Our home town. Rural lots, outbuildings and wineries, where ductless zoning and ground-source heat pumps come up more than they do closer in.
Bothell
Puget Sound Energy or Snohomish County PUD
The county line runs through the city, so which utility and which rebate you fall under depends on your address. Older homes downtown and on Maywood Hill, newer building in Canyon Park, North Creek and Queensgate.
Kirkland
Puget Sound Energy
Finn Hill, North Juanita and Kingsgate annexed in 2011, so permit history for those homes still sits with King County. The city runs its own electrical permitting.
Redmond
Puget Sound Energy
Redmond Ridge, Trilogy, Union Hill and Novelty Hill carry Redmond addresses but sit in unincorporated King County. Redmond runs its own ePermitting system rather than the regional portal.
Bellevue
Puget Sound Energy
The city writes equipment placement into its own land use code and issues its own electrical permits.
The Points
Puget Sound Energy
Medina, Clyde Hill, Yarrow Point and Hunts Point, where lot lines and screening rules usually decide where equipment can sit.
Sammamish
Puget Sound Energy
The Klahanie annexation of January 2016 moved a large area into the city, which matters when we go looking for permit records.
Issaquah
Puget Sound Energy
The city rejects submittals that arrive without screening details, so that gets drawn up before anything is filed.
Mercer Island
Puget Sound Energy
MICC 19.10, the tree code, decides where an outdoor unit is allowed to go more often than anything else does.
Newcastle
Puget Sound Energy
The city only incorporated in September 1994, so anything older than that is a County record.
Seattle and Shoreline
Seattle
Seattle City Light
A different utility means a different rebate programme entirely, and a large share of the housing has no ductwork to work with. We hold both the Washington electrical contractor licence and a Seattle business licence, so the mechanical and electrical permits on a job both come from us.
Shoreline
Seattle City Light
Immediately north of the city line, on the same utility as Seattle rather than PSE.
South Snohomish County
Mill Creek
Snohomish County PUD
Largely built from the 1980s on as a master-planned community.
Brier
Snohomish County PUD
Almost entirely residential, with no commercial core and most homes from the 1960s and 70s.
Mountlake Terrace
Snohomish County PUD
Compact postwar neighbourhoods, most of it built out by the 1970s.
Lynnwood
Snohomish County PUD
Dense postwar housing with a lot of 1950s and 60s stock.
Edmonds
Snohomish County PUD
Older bowl and waterfront homes, with steep lots above the ferry terminal.
Mukilteo
Snohomish County PUD
Waterfront and bluff lots, which decide where an outdoor unit can sit.
Snohomish
Snohomish County PUD
Older housing around the historic downtown core.
Monroe
Snohomish County PUD
The eastern edge of where we work, with larger lots and more acreage properties.
One thing changes the moment you cross the county line. Your electricity comes from Snohomish County PUD rather than Puget Sound Energy, and the PUD runs its own rebate programme through its own list of registered contractors. PSE still supplies the gas on both sides, so a gas bill tells you nothing about which electric programme you are in.
If a heat pump conversion and its rebate are the main thing you are weighing, ask us before you book anything and we will tell you plainly where your address sits and what that means for the price. For service work, boilers, radiant floor, water heaters and repairs, none of that applies.
What changes with your address
Three things move, and they don't move together.
| Electrical permits | Bellevue, Kirkland and Redmond run their own electrical permitting and inspections. Everywhere else it goes to Labor & Industries, with separate King and Snohomish offices. |
|---|---|
| Permit portals | Most neighbouring cities use the regional MyBuildingPermit service. Redmond runs its own ePermitting system instead. |
| Electric utility | Puget Sound Energy across most of the Eastside, Seattle City Light inside Seattle and Shoreline, Snohomish County PUD north of the county line. |
| Gas utility | PSE on both sides of the Snohomish line, which is why a gas bill is no guide to your electric rebate. |
| Placement rules | Set by the city, not the state. Bellevue's land use code, Mercer Island's tree code and Issaquah's screening requirement all decide where equipment can sit. |
Everything we do, anywhere in that area
The same services are available across every town above.
Heating
Heating services · Heater installation · Heater repair · Heater maintenance · Emergency heating repair
Furnaces
Cooling
Heat pumps
Heat pump installation · Ductless heat pumps · Mini-split repair · Geothermal · Air to water heat pump
Water systems
Boiler systems · Radiant floor heating · Water heaters · Heat pump water heaters · Tankless installation · Tankless repair
Air quality
Indoor air quality · Air filtration · Humidifiers · Ventilation
Controls and ducting
Thermostat installation · Thermostat repair · Duct distribution
New build
Rebates depend on where you live
Which rebate you can claim is decided by your electric utility, the heat you're replacing, and in some programmes your household income. NW Mechanical holds PSE Recommended Energy Professional status, which is what PSE requires before it will pay a heat pump rebate.
Our heat pump rebates page lays the regional programmes out side by side, including the conditions that disqualify people most often. If you'd rather not work it out yourself, tell us the address and we'll tell you what applies.
Not sure which of these you're in? Tell us the address and what the system is doing, and we'll tell you whether we cover you, who issues the permit, and which rebate programme your house falls under.
Call (206) 900-9231 or request an estimate.
We also work regularly in Kenmore, Lake Forest Park, Duvall, Carnation, Snoqualmie, North Bend, Beaux Arts Village and Renton. Not sure if we reach you? Just ask. The answer is usually yes.
Permit authorities, portals and local placement rules from each city's own published code and permitting pages. Utility boundaries from Puget Sound Energy, Seattle City Light and Snohomish County PUD service territory information. Rebate conditions change, so confirm current terms before relying on them. Last reviewed October 2026.
HVAC Services Across Seattle and the Eastside
At NW Mechanical, our customers’ comfort is our utmost priority. Since 1977, we've dedicated ourselves to providing exceptional HVAC services tailored to our clients' needs. We offer a comprehensive range of solutions, including air conditioning repair and replacement, as well as heating repair and installation. No matter the challenge, our skilled team is equipped to enhance and maintain our customers’ indoor climate comfort.
Get in Touch
For those residing in any of our service areas, we invite you to experience the commitment and quality that NW Mechanical brings to HVAC services.
Feel free to reach out by calling us at (206) 900-9231 or contact us online to schedule an appointment.
