Position an outdoor receptacle at least 16 inches above the ground. An in-use cover increases protection from the weather. A simple wooden box built around it shields it from bumps by the lawn mower or kids at play. Outdoor receptacles must be GFCI-protected. Check local codes for approved cable, conduit, and boxes.
The quickest way to extend power outdoors is to install a receptacle back-to-back with one inside the house. You also can drill through the wall from a basement or crawlspace and attach a receptacle on the side of a house using an extension ring.
About 2 hours to install a new outdoor receptacle with extension ring and in-use cover (not including cutting a pathway for the cable, and patching walls)
Voltage tester, screwdriver, shovel, hammer, drill, long drill bit, saw, lineman's pliers, long-nose pliers, strippers
Stripping, splicing, and connecting wires to terminals; installing boxes; running cable through walls and ceilings
Make sure the new service does not overload the circuit
GFCI receptacle, outdoor box with extension ring and in-use cover, cable, conduit, fittings, wire nuts, electrician's tape
Shut off power to the circuit. Connect the black and white wires from the power source to the LINE terminals of a GFCI receptacle. After you run cable for the new service, connect those wires to the LOAD terminals so the new service is GFCI-protected. Connect the power source.