How Much Does It Cost to Add a Subpanel in Florida? Garage, Pool & Detached Buildings Explained (2026)

Adding a subpanel in Florida typically costs a few hundred to a few thousand dollars, depending on the amperage, the distance from your main panel, and whether the wire runs indoors or to a detached building. A simple garage subpanel on the same wall as the main panel sits at the low end, while a pool or detached-building subpanel that needs a long underground run and its own permit costs more. The best way to get a real number is a licensed electrician who can inspect your main panel and measure the run.

How much does it cost to add a subpanel in Florida?

A subpanel is a smaller breaker box that branches off your main electrical panel to serve one area, like a garage, pool equipment pad, or workshop. In Florida, the cost depends mostly on distance, amperage, and whether the work stays inside or goes outdoors and underground. Expect a modest job to land in the low hundreds and a complex detached-building install to reach into the thousands.

Several things move the price up or down:

• Amperage of the subpanel. A larger panel (more amps) needs heavier wire and a bigger breaker, which costs more.
• Distance from the main panel. Longer wire runs mean more material and labor.
• Indoor vs. outdoor/underground. Trenching, conduit, and weatherproof fittings add cost.
• Main panel capacity. If your main panel is full or too small, you may need upgrades before a subpanel can be added.
• Permits and inspection. Most subpanel jobs require a permit and a pass from a local inspector.

Because these factors vary so much from home to home, treat any online figure as a rough starting point and get an on-site quote.

What homeowners should know

A subpanel does not add electrical capacity to your home on its own; it redistributes the capacity your main panel already has. If your main panel is near its limit, an electrician may recommend a service upgrade first. Always use a licensed, insured electrician for panel work, since it involves your home's main power and must meet code.

Here is what tends to matter most before you sign off on a job.

What is the cost to add a subpanel in Florida?

The cost to add a subpanel in Florida generally ranges from a few hundred dollars for a simple, short indoor run to several thousand dollars for a detached building or pool with a long underground run. The final price reflects the amperage, distance, materials, and permit requirements for your specific setup.

To budget realistically, ask your electrician to itemize:

• The subpanel and breakers
• Wire, conduit, and fittings
• Labor and any trenching
• Permit and inspection fees
• Any main-panel work needed to support the new subpanel

How much does a garage subpanel cost?

A garage subpanel is usually the most affordable option, especially when the garage shares a wall or is close to the main panel. Costs rise if the garage is detached or the run is long. Expect a garage subpanel to sit toward the lower-to-middle end of the overall range.

Attached garages are simpler because the wire can often run through existing walls. Detached garages behave more like a separate building and may need an underground feeder and their own grounding.

How much does a pool subpanel cost?

A pool subpanel tends to cost more because pool equipment sits outdoors, often away from the main panel, and requires weatherproof, code-compliant wiring and bonding. The added grounding and bonding work for water and metal near the pool raises both labor and material costs.

Pool electrical work in Florida is closely tied to safety code, so this is not a job for guesswork. A licensed electrician will handle the bonding and inspection steps that protect people around the water.

How much does a subpanel for a detached building cost?

Feeding a subpanel to a detached building—like a shed, workshop, or ADU—is typically the most expensive scenario because it usually needs an underground feeder, trenching, conduit, and separate grounding. The longer the distance and the higher the amperage, the more it costs.

Distance is the biggest driver here. A building far across the yard needs more wire and more digging than one just a few feet from the house.

Does Florida's climate affect subpanel installs?

Florida's heat, humidity, and coastal salt air can push electricians toward more corrosion-resistant materials and weather-rated enclosures for outdoor subpanels. These choices can add to the cost compared with installs in drier climates.

For pool and detached-building panels, weatherproofing is not optional—it is part of doing the job correctly. Ask your electrician how they protect outdoor equipment from moisture and corrosion.

Do you need a permit to add a subpanel in Florida?

Most subpanel installations in Florida require a permit and a final inspection. A licensed electrician typically pulls the permit as part of the job, and permit fees vary by city or county.

Using a licensed pro matters here: unpermitted electrical work can cause problems when you sell your home, file an insurance claim, or have future work inspected.

How do you find a trusted electrician for a subpanel in Florida?

Look for an electrician who is licensed, insured, and background-checked, with verified customer reviews. Zip.Agency surfaces one verified Top Pro per zip code per trade—"One zip code. One trusted pro."—so you can skip the guesswork of comparing a dozen listings.

When you talk to a pro, ask them to:

• Inspect your main panel's capacity first
• Confirm the amperage and distance for your subpanel
• Provide an itemized quote
• Explain the permit and inspection steps
• Detail how outdoor work will be weatherproofed

You can find the Top Electrical pro in your zip through Zip.Agency, or browse our home-services guides for more on planning electrical projects.