Detached Garage & Workshop Electrical Installation in St. Johns County, FL

Ryan Davis • September 17, 2026

Need Power to a Detached Garage, Workshop, or Shed in St. Johns County, FL?

Adding a detached garage, workshop, pole barn, or storage shed to your property creates valuable additional space. Whether you plan to use the building for vehicle storage, woodworking, equipment repairs, or a home workshop, having a safe and reliable electrical supply is essential.

At Davis Electric Services LLC, we provide electrical installation services for detached buildings throughout St. Johns County, Florida. From underground electrical feeders and subpanel installations to lighting, receptacles, and dedicated equipment circuits, we can help bring power to your new building.

Running Electricity to a Detached Garage or Workshop

One of the most common ways to supply electricity to a detached building is by installing a new electrical feeder from the property's existing electrical panel to a subpanel in the separate structure.

Depending on the building's location and electrical requirements, the installation may involve:

Installing an underground electrical feeder.
Trenching and backfilling between buildings.
Installing a new electrical subpanel.
Providing grounding and bonding.
Installing lighting, receptacles, and dedicated equipment circuits.

Every property is different, so the installation should be designed around the distance between buildings, available electrical capacity, and intended use of the new space.

Underground Electrical Installation for Detached Buildings

Underground electrical wiring is a common option for supplying power to detached garages, workshops, sheds, and pole barns.

An underground feeder allows electricity to be routed from the existing electrical system to the separate building without overhead wiring between the structures.

Davis Electric Services LLC provides underground electrical installation services that can include trenching, backfilling, conduit installation, feeder wiring, and electrical panel connections.

The required conductor size, wiring method, and installation depth will depend on the electrical load, distance, site conditions, and applicable electrical requirements.

What Size Electrical Panel Does Your Detached Building Need?

Choosing the correct electrical panel size is an important part of planning your project.

The appropriate panel capacity depends on the equipment you intend to operate and the available capacity of your existing electrical system.

60-Amp Subpanel: May be suitable for smaller sheds or detached garages with basic lighting, receptacles, and limited electrical equipment.

100-Amp Subpanel: Often considered for larger garages, workshops, and pole barns requiring multiple circuits for lighting, receptacles, and equipment.

200-Amp Panel or Service: May be appropriate for buildings with substantial electrical demands, depending on the calculated load and available electrical supply.

A proper electrical load calculation helps determine the appropriate feeder and panel size for your specific installation.

Electrical Services for Detached Garages, Shops, and Pole Barns

Once power is supplied to your detached building, Davis Electric Services LLC can install the electrical components needed to make the space functional.

Our electrical installation services include:

Interior and exterior LED lighting.
General-purpose electrical receptacles.
Dedicated 120-volt and 240-volt circuits.
Welder and air compressor circuits.
Electric vehicle charger installations.
Electrical connections for vehicle lifts and shop equipment.
Exterior security and motion detector lighting.
Electrical panel and subpanel installations.

Whether you're building a small backyard workshop or a fully equipped automotive garage, we can develop an electrical installation scope based on your specific needs.

Can Your Existing Electrical Panel Supply Power to Another Building?

Before installing a new feeder or subpanel, it's important to determine whether your existing electrical system has sufficient capacity.

An electrician should evaluate the existing service, current electrical loads, proposed equipment, and distance to the new building.

Some properties may have sufficient electrical capacity to accommodate the additional building without a service upgrade. Others may require electrical modifications or an upgraded service.

Davis Electric Services LLC can evaluate your existing electrical system and determine the appropriate installation approach for your project.

Do You Need an Electrical Permit for a Detached Garage in St. Johns County?

New electrical feeders, subpanels, and wiring installations generally require electrical permits and inspections.

The St. Johns County Building Department provides information regarding building permits and electrical work. Requirements should be confirmed for the specific property and proposed installation.

St. Johns County

Proper permitting and inspections help ensure that electrical installations meet applicable safety and installation requirements.

Detached Garage & Workshop Electrician in St. Johns County, Florida

Davis Electric Services LLC provides electrical installation services for homeowners and property owners throughout St. Johns County, including St. Augustine, Ponte Vedra Beach, Nocatee, and surrounding communities.

Whether you need a 100-amp subpanel installed in a detached garage, an underground electrical feeder run to a pole barn, or complete electrical wiring for a new workshop, our team can help.

We provide free visual estimates and can discuss the electrical requirements for your specific project.