How Much Does a Whole-House Generator Cost in Florida? (2026 Guide)

If you've lived through a Florida hurricane season without power, you already know the answer to "do I need a whole-house generator?" The question most homeowners ask us is: how much does it actually cost?

As an authorized Generac dealer serving Port St. Lucie and the Treasure Coast, we install standby generators every week. Here's an honest, detailed breakdown of what you can expect to pay in 2026.

The total cost of a whole-house standby generator in Florida — including the unit, transfer switch, gas line work, electrical connection, permits, and installation — typically falls between $5,000 and $15,000 for most residential properties.

The wide range reflects real differences in home size, fuel type, and site conditions. Let's break it down.

The generator itself is the biggest cost driver. Generac — the most trusted name in standby generators — offers a range of sizes for different home needs:

For most Port St. Lucie homes (1,500–2,500 sq ft), a 16–22 kW Generac covers everything including central AC, refrigerator, lights, and outlets. That's the sweet spot for whole-home coverage without oversizing.

The generator unit is only part of the total. Here's what else goes into a complete installation:

Automatic Transfer Switch (ATS): $500–$1,500 The transfer switch detects a power outage and automatically starts your generator within seconds. This is required for any standby generator — it's what makes it "automatic."

Electrical Connection: $300–$800 Connecting the generator to your home's electrical panel, including any necessary panel work.

Gas Line Extension: $300–$1,200 Most standby generators in Florida run on natural gas or propane. If your gas line needs to be extended to reach the generator pad, that adds to the cost. We handle this in-house since we're also a licensed plumbing contractor (CFC1431415).

Concrete Pad: $200–$500 Generators must be installed on a level, stable surface. Most installations require a concrete pad.

Permits and Inspection: $150–$400 All generator installations in St. Lucie County require permits. We pull all permits and schedule inspections — this is non-negotiable for insurance purposes and code compliance.

Most of Port St. Lucie has access to natural gas through FPL, making it the most convenient and cost-effective fuel choice. Natural gas lines don't run out — your generator will run indefinitely as long as the gas supply is intact (which is almost always the case even during hurricanes).

If your home doesn't have natural gas service, propane is the next best option. You'll need a propane tank (250–500 gallon is typical), which adds $800–$2,000 to the project but gives you the same automatic standby capability.

Florida averages more power outages per year than almost any other state, driven by:

• Hurricane season (June–November): Extended outages of 3–14 days are common after major storms
• Summer thunderstorms: Daily afternoon storms can knock out power for hours
• Heat danger: Without AC, Florida homes can reach dangerous temperatures within hours

A whole-house generator isn't a luxury in Florida — for many families, especially those with medical equipment, young children, or elderly relatives, it's a safety necessity.

Portable generators cost $500–$2,000 and seem like a budget-friendly alternative. But they come with real drawbacks:

• Must be manually started and connected
• Can't power central AC (only window units)
• Require safe outdoor placement and extension cords
• Carbon monoxide risk if used improperly
• Not connected to your home's wiring — no automatic protection

For true whole-home coverage and automatic protection, a standby generator is the right choice.

A few tips to get the most value:

1. Get multiple quotes — but make sure you're comparing apples to apples (same kW size, same transfer switch type, permits included)
2. Buy from an authorized dealer — Generac's warranty (5 years on residential units) is only valid through authorized dealers like Imperium Electric
3. Bundle with other electrical work — if you're also doing a panel upgrade or adding circuits, bundling saves on mobilization costs
4. Ask about financing — we offer financing options to spread the cost over time

Imperium Electric is an authorized Generac dealer serving Port St. Lucie, Stuart, Jensen Beach, Palm City, Hobe Sound, and Fort Pierce. We handle the entire project — generator selection, gas line, electrical connection, permits, and inspection — so you have one point of contact and one warranty.

Call (772) 237-0320 or book a free estimate online. We'll assess your home's power needs and give you an exact quote with no surprises.

Related reading: How to Choose a Generac Generator Dealer in Port St. Lucie | Generator Permit Requirements in Port St. Lucie | Generator Maintenance Tips for Florida Homeowners | View our Generator Services