Wondering what it costs to get generators installed? Short answer: anywhere from $500 for a simple setup to $50,000+ for big commercial systems. Prices swing with size, complexity, and council rules. Stick around—we'll break down the numbers so you don't blow a fuse over the costs!
Not sure which generator is right for you?
Take the quiz!
When people ask about generator installation cost, they're often thinking about the whole picture—machine plus setup. Portable units are the cheapest to install, usually between $500 and $2,000. Standby or whole-house systems are more serious investments, often between $3,000 and $10,000. Commercial systems? Think $10,000 to $50,000 or more.
Buying the generator is just the start. Installation costs cover the wiring, fuel lines, and labour. In many cases, the setup can cost nearly as much as the unit itself. Skipping this side of the budget is one of the biggest mistakes homeowners make.
If you're planning for a whole-house system, expect to spend anywhere between $5,000 and $15,000. The final number depends on the generator's size, any extras like automatic transfer switches, and how tricky your property is to work with.
The automatic transfer switch is the quiet achiever. It's the bit of kit that flips you over to generator power when the grid cuts out. It's also one of the priciest parts of the job. While it adds thousands to the bill, it's worth every cent for peace of mind.
A generator doesn't just plug into a wall socket. It needs safe wiring, solid fuel lines, and proper integration with your home. If your electrical panel is outdated or if fuel lines have to run a long way, the costs rise quickly.
Choosing your fuel source can change the price tag. Extending a natural gas line may mean higher upfront plumbing work but lower running costs. Propane tanks, on the other hand, require buying and installing a tank, which can push up your initial spend.
A generator needs a sturdy home too. Concrete pads or ground levelling aren't optional for larger systems. They add extra cost but give your unit stability, safety, and longer life.

Most homes of this size only need around 7–10 kW. That's usually enough to keep the lights on, the fridge cold, and heating or cooling running when needed.
All up, you're looking at somewhere between $5,000 and $8,000. The final figure depends on fuel choice, site access, and whether your wiring needs an upgrade.
A 2000 sq ft home usually needs a generator between 12–15 kW. That covers essentials plus extras like air conditioning or multiple appliances running at once.
Budget around $7,000 to $12,000. Mid-sized homes often mean more circuits to cover, which can increase installation time and costs.
Larger homes come with larger demands. A 20–25 kW generator or even bigger might be needed to keep everything running without compromise.
The price tag for these setups can easily reach $12,000 to $20,000 or more. Heavy-duty pads, bigger fuel storage, and more complex wiring all push the costs higher.
Online calculators are handy for getting a rough idea. Pop in your home size, appliances, and location, and you'll get a ballpark estimate in minutes.
But calculators can't tell you everything. They don't know about your awkward backyard, your outdated switchboard, or your council's unique permit rules. For a true cost, a professional quote is non-negotiable.

Installing a generator is not a DIY weekend project. Licensed electricians and plumbers keep the job safe, legal, and up to standard. Hiring experts also protects your home insurance and warranty.
Don't just go with the first installer you call. Getting three or more quotes gives you a clearer idea of fair pricing and service quality.
Councils can be strict. Some require permits for fuel storage, others noise compliance checks. Permits might add a few hundred dollars but ignoring them can cost much more in fines.
Most generator warranties require professional installation. Cutting corners could void your coverage and leave you paying for costly repairs down the line.
A generator is more than a machine—it's a safety net. The true cost depends on the type you choose, how complex your site is, and whether you tick all the compliance boxes. From a modest home setup to a commercial-scale system, investing in professional installation gives you reliability when it matters most.