How Much Does It Cost to Install a Generac Generator?
A clear, local breakdown for Vancouver and Clark County homeowners — what drives the price, what to expect for your home, and why the installed number is the one that actually matters.
Homeowners across the Pacific Northwest have been looking for better ways to keep the lights on when the grid goes down. Between winter windstorms, ice events, and the kind of multi-day outages Clark County sees most years, demand for reliable backup power has grown fast — and residential standby generators are now one of the most popular upgrades we install. Naturally, the first question is almost always: “How much does it cost to install a generator?”
The honest answer is that it depends on your home — but it depends in predictable ways. Below we break down every factor that moves the price, what a typical Clark County installation looks like, and the local permitting and fuel details most online cost guides leave out. We want you well informed before you make the call.
The short answer: For most Clark County homes, a Generac air-cooled standby generator runs roughly $8,000–$15,000 installed, all-in (equipment, materials, electrical, gas hookup, and permits). Smaller essential-circuit setups can start lower; whole-home and liquid-cooled systems run higher. The generator itself is only part of the number — installation is where homes differ most.
Key Elements That Affect Cost
Since every property is different, a generator installation has to be tailored to your specific site. That’s why two homes on the same street can land at very different prices. These are the primary factors with a direct bearing on your total:
Generator size (kW)
The output needed to meet your home’s electrical load. Bigger panels and all-electric homes need more capacity.
Site & excavation
Landscaping, the pad location, and the run distance from the gas meter and electrical panel to the unit.
Materials & conduit
Wire, conduit, the transfer switch, and the gas line — quantities scale with distance and complexity.
Electrical & gas upgrades
An older or full electrical panel may need upgrading, and gas pressure or sizing may need work.
Auxiliary equipment
Automatic transfer switch, load-management modules, and a concrete or composite pad to support the system.
Permits & inspection
Washington electrical permits and local mechanical/gas permits required by code — more on this below.
When these are included, the installation labor and materials alone (separate from the generator unit) commonly fall between $3,000 and $9,000, depending on how complex your site is.
Generac Cost by Generator Size
Sizing is the single biggest cost driver. Here’s a realistic look at how output maps to what it can power and a typical installed range for a Clark County home. Use it as a guide — an on-site assessment gives you the real number.
| Generator size | What it powers | Best for | Typical installed |
|---|---|---|---|
| 10–13 kW | Essential circuits: furnace, fridge, well pump, key outlets | Smaller homes, backup of must-haves | $8,000–$11,000 |
| 14–18 kW | Most of the home, including some HVAC | The most common Clark County choice | $10,000–$14,000 |
| 20–24 kW | Whole-home coverage for most gas-heated homes | Larger homes, AC + heat together | $12,000–$16,000 |
| 26 kW+ (liquid-cooled) | Large or all-electric homes, heavy loads | Estates, all-electric, shops | $16,000–$25,000+ |
Ranges are estimates for planning only and vary with site conditions, fuel type, and panel work. Not sure which size fits? See our guide on what size generator you need for your house.
Natural Gas vs. Propane in SW Washington
Your fuel source affects both the install cost and how the unit runs — and in Clark County it often comes down to where you live.
In and around Vancouver
Much of the urban core — Vancouver, parts of Camas and Washougal — has natural gas service (in our region, supplied by NW Natural). If your home already has a gas meter, a standby Generac can tie straight into it, which usually keeps the fuel side of the install simpler and avoids a fuel tank.
Rural Clark County
In Battle Ground, Brush Prairie, Yacolt, La Center, and outlying areas, many homes are beyond the natural-gas network and run on propane. That means a tank (owned or leased) and the line work to support it — a real factor in your total cost, but very common out here and entirely workable.
A licensed electrician should confirm your gas type and pressure before quoting, because an undersized or low-pressure line is one of the most common surprises that changes a generator bid.
Permits & Inspection in Clark County
A standby generator is permanent electrical and fuel work, so it is permitted work — not a DIY weekend project. In Washington, electrical permits are issued through the Washington State Department of Labor & Industries (L&I), and local mechanical or gas permits may also apply depending on the fuel connection. The work has to pass inspection.
- An electrical permit is required for the transfer switch and wiring tie-in.
- A gas or mechanical permit may be required for the fuel connection.
- Final inspection confirms the install meets current code before it’s energized.
- Permit handling is normally included by a licensed installer — you shouldn’t have to chase it yourself.
This is exactly where hiring a properly licensed contractor pays off: permits pulled correctly, inspection passed the first time, and an install that won’t cause problems when you sell the home. (Curious why permits and prep make the installed price higher than a unit’s online sticker? We cover that in why the online price isn’t the installed price.)
The Advantage of an Authorized Generac Dealer
When you want something done with quality, it pays to work with specialists. An authorized Generac dealer keeps their certifications current and offers full-cycle service: helping you select the right unit, sizing it correctly, handling the installation and startup, and providing ongoing maintenance and repair down the road. That continuity matters — the company that sizes and installs your generator should be the one that stands behind it.
You can look up dealers near you on Generac’s own site — see their help article, “How Can I Find a Generac Service Dealer in My Area?”
Why Clark County Homeowners Trust MAS Pro
MAS Pro is a locally owned, licensed and bonded Washington contractor specializing in residential and commercial electrical work across Vancouver and Clark County. Our electricians are certified and experienced across generators, panels, and whole-home systems — and our roots in the trades run deep.
Generac Generator Cost FAQ
For most Clark County homes, a Generac air-cooled standby generator costs roughly $8,000 to $15,000 installed, all-in. Installation labor and materials alone typically run $3,000 to $9,000, with the generator unit on top of that. Your final price depends on the size you need, fuel type, panel condition, and how far the unit sits from your meter and panel.
Most Clark County homes land in the 14–18 kW range, which covers the majority of the home including some HVAC. Smaller homes backing up only essentials may need 10–13 kW, while large or all-electric homes often require 22–26 kW or a liquid-cooled unit. The right size is based on a load calculation of your actual circuits — an electrician can size it precisely.
Yes. A standby generator is permanent electrical and fuel work, so it requires permits and a final inspection. In Washington, electrical permits are issued through the Department of Labor & Industries (L&I), and a local mechanical or gas permit may also apply for the fuel connection. A licensed installer normally pulls and manages these permits for you.
It usually depends on where you live. Homes in and around Vancouver with existing natural gas service can often tie a Generac straight into the gas meter, keeping the fuel side simpler. Rural Clark County homes — Battle Ground, Brush Prairie, Yacolt, La Center — are frequently beyond the gas network and run on propane, which means a tank and line work. Both are reliable; the right choice comes down to what’s already available at your property.
The online sticker is just the bare unit. The installed price adds the transfer switch, the concrete or composite pad, the conduit and wiring run, the gas or propane connection, any panel upgrade, plus permits and inspection. These are required for a safe, code-compliant, warranty-backed system — which is why a complete installed quote is the only number worth comparing.
Yes. Like any engine, a standby generator needs periodic maintenance — oil and filter changes, battery checks, and a load test — to be dependable when an outage hits. Most homeowners schedule annual service. MAS Pro offers generator maintenance plans so your system is ready before storm season, not during it.
Get a Real Number for Your Home
If you’re wondering what a Generac will cost at your address, MAS Pro will walk you through the options and give you a clear, all-in quote — no guesswork. Serving Vancouver and all of Clark County.
