Standby Generator Installation Cost Estimator

Answer 4 quick questions and see a real price range for a Generac 24 kW standby generator installed at your home. No email required to see your price. When you’re ready, Loi, our master electrician, comes out for a free in-person estimate and gives you an exact written quote.

WA L&I Lic. LEBROBC755MT
Permit & inspection handled
Family-owned in Auburn
Serving the Puget Sound

Step 1 of 4

What do you want running in an outage?

Pick what matters most. You can change this with Loi on site.

The essentialsFurnace, fridge, lights, Wi-Fi, and a few outlets The whole houseEverything on, with smart controls that pause big appliances so they don’t all start at once

How big is your home?

Finished square footage. A close guess is fine.

Under 1,500sq ft 1,500 – 2,500sq ft 2,500 – 3,500sq ft Over 3,500sq ft

How do you heat your home?

Heat is the biggest load in a Northwest outage.

Gas furnaceNatural gas or propane Heat pumpDucted or ductless ElectricBaseboard, wall heaters, or electric furnace Not sureLoi will check

Which of these do you have?

Check all that apply, or skip if none.

Central AC Electric range Electric water heater EV charger Hot tub Well pump Medical equipmentOxygen, CPAP, lift chair

What fuel is available?

Standby generators run on natural gas or propane.

Natural gasI have a gas meter PropaneI have or will get a tank Not sureWe’ll help you figure it out

Do you already have the generator?

No, Le Bros supplies itBest valueWe buy and deliver the Generac generator and transfer switch

Contractor pricing, below what most homeowners pay on their own
The right model and transfer switch for your panel
Delivered and set in place, no hauling a 400+ lb unit
One point of contact for equipment and installation

Yes, I have my ownGenerator and automatic transfer switch already purchased

How far is the panel from where the generator would go?

The generator sits outside, usually near your gas meter. Measure from there to your electrical panel.

Under 15 ftSame wall, close by 15 – 35 ft 35 – 60 ft Over 60 ftOr a trench is needed Not sure

What’s your electrical panel like?

The brand name is on the label inside the panel door.

Modern 200-ampHas open breaker spaces Older or fullNo open spaces, or 20+ years old Needs replacingZinsco, Federal Pacific, fuse box, or 100-amp service 400-amp or two panelsUsually larger homes Not sure

What’s the spot like outside?

Flat, easy accessSide yard or by the driveway Sloped or tightSteps, slope, or landscaping in the way

Should we handle the utility disconnect?

Power from the utility has to be shut off and turned back on during the install. This is optional.

Yes, add it (+$700)We coordinate the disconnect and reconnect with your utility No, I’ll arrange itYou schedule it with your utility yourself

Your ballpark price · 2026 pricing

Included in your install

Generac standby generator and 200-amp automatic transfer switch at contractor pricing, purchased and delivered
Concrete pad poured by our crew
Conduit, wiring, and generator control wire to the transfer switch
Utility power disconnect and reconnect ($700, shown above)
Electrical permit and inspection
We help you set up your generator once the permit passes

What Loi checks on site

Load calculation to confirm the right size
Exact wire run and generator location
Panel, service, and meter condition
Gas meter or propane capacity
Setbacks from windows, doors, and property lines

Not included

Gas line work (hire a licensed gas contractor separately)
Cutting, patching, and painting sheetrock
Utility power disconnect and reconnect (optional, +$700)
Problems with customer-supplied equipment (covered by the manufacturer’s warranty, not our installation)

Get your exact price from Loi

Book a free in-person estimate. Loi measures, does a real load calculation, and gives you an exact written quote. No pressure.

Call us Text us my estimate

or request a visit below and we’ll call you

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Email (optional)

City or ZIP

When do you want it installed?

Best time for Loi’s visit

Anything else? (optional)

I agree to be contacted by Le Bros Construction by phone, text, or email about my estimate request. We respect your privacy and never share your information.

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How it works

Get your ballparkRight here, in about a minute.
Loi visitsFree in-person estimate with a real load calculation.
We installPermit, pad, generator, transfer switch, inspection, and setup.

Standby generator installation in the Puget Sound

Windstorms knock out power across Western Washington every winter. A standby generator turns on by itself within seconds of an outage and keeps your heat, fridge, lights, Wi-Fi, well pump, and medical equipment running until the power comes back. Le Bros Construction installs whole-home and essential-circuit standby generators for homes and adult family homes in Seattle, Tacoma, Auburn, Kent, Bellevue, Gig Harbor, and Kitsap County.

Every installation is permitted and inspected. Our crew pours the concrete pad, delivers and sets the generator, wires the automatic transfer switch, and helps you set up your generator once the permit passes. Loi, our master electrician, personally does the in-person estimate.

Generator questions we hear most

What size generator do you install?

We install the Generac 24 kW standby generator with a 200-amp automatic transfer switch. It covers most Puget Sound homes, and smart load management lets big appliances like heat pumps and water heaters take turns. Loi does a real load calculation on site to confirm it fits your home.

Is the gas line included?

No. The gas or propane connection must be done by a licensed gas contractor, hired and paid for separately. Le Bros handles the electrical work.

Do I need a permit?

Yes. Standby generators need an electrical permit and inspection in Washington. We pull the permit and meet the inspector for you.

My panel is a Zinsco or Federal Pacific. Can I still get a generator?

Yes, but the panel should be replaced first. These brands are known for breakers that can fail to trip. We can replace the panel and install the generator in one project. See our panel upgrade service.

How accurate is this estimator?

It gives you a realistic range based on our current pricing. Your exact price comes from Loi’s free in-person estimate, after he checks your panel, measures the wire run, and confirms the right generator size.

⚡ Refer a friend, earn a bonus

Past Le Bros clients: when you refer a new client and their project is completed, we give you 10% of our profit from that project. There’s no limit, so you earn a bonus for every completed project you refer. Just ask your friend to mention your name when they contact us.