Furnace short-cycles or won't hold a set temperature
HVAC · Seattle, WA
HVAC Services in Seattle, WA
Most HVAC service calls in Seattle start at $129 for a diagnostic, with repair and installation costs quoted after inspection. SPS Pro Services has served King County homeowners since 2017, dispatching licensed technicians across Seattle and the Eastside, often with same-week appointments Monday through Friday, 8am to 6pm.
Typical costfrom $129
WarrantyWorkmanship warranty
AvailabilitySame-week visits
HoursMon–Fri 8am–6pm
Seattle's building department and Washington State Department of Labor & Industries require permits for most furnace replacements, ductless heat pump installs, and electrical panel upgrades tied to HVAC work. SPS Pro Services pulls the required permits, schedules L&I electrical inspections when panel or circuit work is involved, and documents everything to code before startup. That paperwork protects your home's resale value and keeps insurance claims valid if a system ever fails.
Local knowledge
What's different about hvac services in Seattle
Local housing stock and utilities in Seattle change what this work involves.
Many Seattle homes in neighborhoods like Ballard, Wallingford, and Ravenna were built between 1905 and 1955, often with undersized ductwork or aging wiring that has to be brought up to code before a heat pump or new furnace can go in.
Seattle's marine climate keeps summers mild but winters cool and damp, so equipment sizing has to account for steady low-grade heating demand and humidity control rather than extreme temperature swings.
Seattle City Light supplies electric power within city limits while Puget Sound Energy delivers natural gas, so equipment choice and permit paperwork can differ depending on which utility feeds your specific address.
Symptoms we see daily
Signs you need hvac services in Seattle
Heat pump runs constantly without warming or cooling the house
Upstairs rooms or additions never reach the thermostat setting
Energy bills jump noticeably without a change in usage
Musty smell or visible moisture near ductwork, vents, or the unit itself
No surprises
How a Seattle hvac services visit works
1
Phone consult
Call (206) 427-8907, describe the issue or project, and get a diagnostic appointment scheduled, usually within the same week.
2
On-site diagnostic
A licensed technician inspects the system, checks electrical and gas connections, and explains findings on the spot for the $129 diagnostic fee.
3
Permit check
SPS Pro Services confirms whether Seattle or Washington State L&I permits apply to the job and pulls them before any work begins.
4
Repair or installation
Technicians complete the repair or install using code-compliant materials and wiring rated for the job.
5
Inspection and sign-off
We schedule the required city or L&I inspection and walk you through the permit paperwork so it's on file if you sell the home.
Flat-rate pricing
HVAC Services in Seattle — what it costs
Conservative ranges for the Seattle metro. Your written quote is exact before work begins.
| Job | Typical price |
|---|---|
| HVAC Services — diagnosticFlat written quote before any work starts | from $129 |
| In-home assessmentExact flat quote for your specific job | Included |
| Emergency visit24/7 line, dispatched across our service area | Call for availability |
Prices reviewed by Sergei Petrov · July 2026. Parts availability can shift ranges — the quote you sign is final.
24/7 Emergency Line
Emergency dispatchNo heat at 11pm? We pick up.
Office hours are Mon–Fri, but the emergency line never closes. Call any hour and we dispatch a licensed tech across Greater Seattle.
Straight answers
HVAC Services in Seattle — FAQ
Do I need a permit for a furnace replacement in Seattle?
Yes. The City of Seattle requires a mechanical permit for most furnace and heat pump replacements, and Washington State L&I requires an electrical permit if the job involves new circuits or panel work. SPS Pro Services pulls both permits as part of the job and schedules the required inspections, so you're not left explaining unpermitted work when you sell the house.
How much does an HVAC diagnostic visit cost in Seattle?
Diagnostic visits start at $129 for most Seattle-area calls, covering a full system inspection, an electrical safety check, and a written estimate for any repair or replacement. Final job cost depends on parts needed, permit fees, and whether panel upgrades are required to meet current code.
Do you also service Bellevue, Redmond, Kirkland, Sammamish, and Issaquah?
Yes, SPS Pro Services covers Seattle plus the Eastside cities of Bellevue, Redmond, Kirkland, Sammamish, and Issaquah. Permit requirements shift slightly by jurisdiction, so we confirm the correct city or county process before scheduling any install that needs an inspection sign-off.
Why does my Seattle home need electrical work just to install a heat pump?
Many Seattle homes built before 1960 have 60 to 100 amp electrical panels that can't safely support a modern heat pump or electric furnace. Washington State L&I code requires the circuit to be properly rated before HVAC equipment is connected, so a panel evaluation is usually part of the installation estimate.
Founder & Lead HVAC Technician, SPS Pro Services
EPA Section 608 UniversalNATE Core Certified14+ years in the trade
Reviews the pricing and service guidance on this page against SPS Pro Services's actual job records in Seattle and across the Seattle metro.
Prices reviewed July 2026
Also in Seattle
Other services our crew handles on the same routes.
Need hvac services in Seattle?
Call (206) 427-8907 to schedule a Seattle HVAC diagnostic or ask about permit requirements for your project.