How to Build a Dog Fence | Boundary Setup Basics

For the full breakdown, see our best Dog Fence For Large Area guide.

Keeping a dog contained without blocking the view usually comes down to one of two approaches: a physical fence you construct, or an in-ground electric containment system. The in-ground route is less visible and often cheaper, but it demands careful installation. The steps below follow PetSafe’s Classic and Basic In-Ground Fence guidance, which covers the essentials that apply to most brands.

Plan the Boundary Before You Dig

Walk the perimeter you want to protect and decide where the wire will run. PetSafe’s instructions call for starting at the base unit location and laying out the entire loop above ground first — before any trenching. This dry run lets you spot problems while fixing them costs nothing but time.

Keep these placement rules in mind from the start:

• Run the boundary wire at least 5 feet away from metal objects, which can interfere with the signal.
• Plan a complete loop — the wire must begin and end at the base unit, with no gaps.

If your yard has a driveway or paved path, check for an existing expansion joint to tuck the wire into. No joint available? Cut a narrow channel with a circular saw, clear the debris, and run the wire through before sealing it.

Mount the Base Unit and Lay the Wire

The transmitter base unit goes inside — typically a garage or utility room — plugged into a surge-protected outlet. Use the mounting template included with the kit to mark screw holes, then attach the unit with the provided hardware. Keep in mind that the cord length limits how far the unit can sit from the outlet.

Once the base unit is mounted, connect the boundary wire to the terminals, then lay the loop along your planned route. Leave the wire on the surface until you’ve tested the system, then bury it in a trench 1–3 inches deep. The trench only needs to be as wide as the wire itself — no need for a wide excavation.

For the collar to work correctly, the receiver must make solid contact with the dog’s skin. Test the fit with the prongs against the neck, and trim fur where needed.

Test the System and Adjust the Boundary

Power up the base unit and walk the boundary with the collar in test mode. You should hear a warning tone as you approach the wire, which lets you confirm the loop is working before you bury anything.

If the boundary feels too wide or too narrow, adjust the control dial on the base unit to shrink or expand the field. PetSafe recommends checking that everything functions properly after installation and fine-tuning the dial as needed. Walk the full loop once more after adjustments to confirm consistent coverage.

For a large yard, planning where the wire runs matters even more — a poorly placed boundary can leave dead zones near metal sheds or under power lines. If you’re covering several acres, the wire layout and transmitter range become the deciding factors.

FAQs

How deep should the dog fence wire be buried?

PetSafe’s installation guidance specifies a trench 1 to 3 inches deep. That depth protects the wire from mowers and foot traffic while keeping it shallow enough to repair easily if something goes wrong. The trench should be only as wide as the wire itself.

Can the boundary wire cross a driveway?

Yes. If the driveway has an expansion joint, run the wire through it directly. Otherwise, cut a channel with a circular saw, clear out the debris, and lay the wire inside before patching. This protects the wire from vehicle weight and weather.

Why does my dog run through the fence?

Usually the collar fit or the boundary adjustment is off. The receiver prongs need solid skin contact, and the boundary dial must be set so the warning tone starts early enough for the dog to stop. Confirm the loop is complete and the collar is snug before assuming the dog is ignoring the system.