Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Electrical Contractor Lic. #HOMECCA782DC • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer • Lennox Premier Dealer
Standby generator installation in Seattle
Home Comfort Alliance installs standby generators in Seattle homes from its Redmond branch. We size the unit to your loads, install the transfer switch Seattle City Light requires, run the gas line and pull the SDCI permits. Installs are planned and scheduled, and right now we offer $1,000 off generators.
Book a free in-home estimate by phone at (425) 645-0404 or online. Our electricians work Monday to Friday, 8 AM to 5 PM. Planned installs for Seattle homes since 1977.
Brands: Generac and other major generator brands. For generator maintenance, see generator service and maintenance.
Is a standby generator right for your Seattle home?
Seattle's worst outages come with fall and winter windstorms. On November 19, 2024, a bomb cyclone brought gusts near 60 mph and cut power to more than 114,000 Seattle City Light customers, the utility's largest outage since 2006 (City Light Powerlines). A standby generator starts on its own when the grid drops and keeps chosen circuits running until power returns. It is worth pricing if you rely on medical equipment, have a sump pump, work from home, or need your furnace or heat pump running through a multi-day outage. More planning tips: planning a standby generator installation and 5 ways to prepare for a power outage.
What a Seattle generator installation involves
Sizing: essential circuits or the whole home
We list what you want running, such as the furnace or heat pump, refrigerator, sump pump, lights and outlets, and size the generator to those loads. An essential-circuit setup costs less; whole-home backup needs a larger unit. We also check your electrical panel, because an older or full panel may need work before a transfer switch fits (electrical panel upgrade in Seattle).
The transfer switch City Light requires
Seattle City Light warns that a generator connected without a transfer switch can send power back into the lines and put crews at severe risk, and it says transfer switches must be installed by a licensed electrician and approved by City Light (City Light generator safety). We install the switch as part of every standby job.
Gas line or propane
Most Seattle standby generators run on natural gas. If PSE supplies your gas, PSE reviews whether your meter and service can carry the added load before the generator is turned on, and any meter or service change is billed to the customer. Homes without gas service can run the generator on a propane tank.
Placement and Seattle's noise code
The generator sits outdoors on a level pad with the manufacturer's clearances from windows, doors and vents. Seattle's noise code (SMC 25.08) limits sound between homes to 55 dB(A), and 10 dB(A) less at night, so we choose a spot with neighbors in mind and set the weekly self-test for daytime hours.
Seattle permits and City Light
The Seattle Department of Construction and Inspections (SDCI) issues the electrical permit for a standby generator and inspects the work, and the gas piping to the generator needs its own permit (SDCI electrical permits). We hold a Seattle business license and the gas piping license SDCI requires, so one company handles both the wiring and the gas line. PSE turns on gas service to the generator only after the permit is approved. We pull the required permits for every installation and arrange the inspections.
What a standby generator costs in Seattle
Your price depends on the generator size, the fuel, the transfer switch, the length of the gas line and any panel work. We set an exact, upfront price at a free in-home estimate, and right now we offer $1,000 off generators. Generator maintenance after installation is $465.
| Regional estimate | Average | Typical range |
|---|---|---|
| Generator installation, Seattle (Angi, March 2026) | $2,601 | $1,058 to $4,145 |
Regional estimate from Angi, March 2026. It is not our price; whole-home standby systems often cost more.
Financing through Salal Credit Union or Synchrony starts at $179/month* (financing).
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get a free estimateAn in-home visit and a written, upfront price before any work begins.
How a standby generator installation works
- Book a free in-home estimate by phone or online.
- We review your loads, panel, gas service and the best spot for the generator.
- You get a written, upfront price before any work begins.
- We pull the SDCI electrical and gas piping permits and notify PSE of the added gas load.
- Our crew sets the pad and generator, installs the transfer switch and runs the gas line.
- SDCI inspects the work; PSE turns on gas to the generator after approval.
- We start the generator, test a transfer under load and walk you through how it works.
A recent Seattle generator job
In July 2026 one of our electricians did the yearly maintenance on a Generac 24 kW standby generator at a home in Seattle's 98115 ZIP code. Regular service like this, $465 a visit, keeps the battery, oil, filters and automatic transfer working so the generator starts on its own the next time a windstorm takes the power out.
Where in Seattle we install generators
Our Redmond branch team installs standby generators across Seattle, from the north end to West Seattle and the south end. Nearby, we also install standby generators in Tacoma. For all areas, see residential generators.
Seattle standby generator FAQ
How much does a standby generator cost to install in Seattle?
It depends on generator size, fuel, transfer switch, gas line length and any panel work. We set an exact, upfront price on a free in-home estimate. For a benchmark, Angi lists a Seattle generator installation average of $2,601 (March 2026); that is not our price. Ask about $1,000 off generators.
Do I need a permit for a home generator in Seattle?
Yes. Seattle's SDCI issues the electrical permit, and gas piping needs its own permit. We pull the required permits for every installation and arrange the inspections.
Does City Light need to approve my transfer switch?
Yes. Seattle City Light says transfer switches must be installed by a licensed electrician and approved by City Light. A switch stops your generator from sending power back into the lines crews are repairing.
Natural gas or propane?
Both work. If you have PSE natural gas, PSE reviews whether your meter and service can carry the extra load. Without gas service, the generator runs on a propane tank.
What size generator do I need?
It depends on what you want running: essential circuits such as the furnace, fridge, sump pump and lights, or the whole home. We size it from your loads during the estimate.
Will I need an electrical panel upgrade?
Sometimes. An older or full panel may need work before a transfer switch fits. We check your panel at the estimate and tell you upfront.
Are standby generators allowed under Seattle's noise rules?
Seattle's noise code (SMC 25.08) limits sound between homes to 55 dB(A) in the day and 10 dB(A) less at night. We choose a placement with that in mind and set the weekly self-test for daytime hours.
Where can the generator go?
Outdoors on a level pad, with the manufacturer's clearances from windows, doors and vents. We plan the spot with you at the estimate.
Which brands do you install?
Generac and other major generator brands.
Can you install one during a power outage?
Installs are planned and scheduled during business hours, Monday to Friday, 8 AM to 5 PM. The best time to plan is before storm season.
How much does generator maintenance cost?
Generator maintenance is $465.
Can I finance a generator?
Yes. Payment plans start at $179/month* through Salal Credit Union or Synchrony. *Subject to credit approval; see footnote.
Sources: Seattle City Light Powerlines, November 2024 storm; Seattle City Light generator safety; SDCI electrical permits; SDCI gas piping; Angi, Seattle generator installation cost (March 2026). All read November 4, 2026.
Why Choose Home Comfort Alliance in Seattle?
Your Comfort is Our Promise
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Ready to plan a generator for your Seattle home?
Tell us what you want to keep running, and our Redmond branch team will set up an in-home estimate with a written, upfront price.
Get an estimate
We will call you to set up the visit.