Can I run electrical underground to my Calgary backyard shop?

Yes, you can run electrical underground to a backyard shop, but it must be done by a licensed electrician with an electrical permit from the City of Calgary. This is not a DIY project — it involves new circuits, underground wiring methods governed by the Canadian Electrical Code, and inspection by a Safety Codes Officer.

The standard method for underground electrical runs in Calgary is TECK cable (thermoplastic, extruded, cross-linked, and polyethylene-jacketed cable), which is specifically designed for direct burial and outdoor use. TECK cable is armoured with an interlocking metal jacket that provides mechanical protection against shovels, rodents, and ground movement. The alternative is running individual conductors through rigid PVC conduit or HDPE conduit buried underground. Your electrician will recommend the best method based on the distance, power requirements, soil conditions, and local code interpretation. TECK cable costs $2.50 to $9.00 per foot depending on the wire gauge, while conduit runs add material and labour costs for the conduit installation plus wire pulling.

Burial depth is a critical factor in Calgary. The Canadian Electrical Code specifies minimum burial depths based on the wiring method: direct-buried TECK cable requires a minimum of 600mm cover, while rigid PVC conduit requires 450mm minimum. However, Calgary's frost depth exceeds 1.2 metres, and most experienced Calgary electricians bury at or below the frost line to prevent damage from ground heave. This is especially important because of Calgary's chinook-driven freeze-thaw cycles — the ground repeatedly freezes, thaws, and refreezes throughout winter, creating significant heaving forces that can shift conduit, stress connections, and crack rigid conduit at joints. Using flexible conduit or ensuring adequate expansion joints in rigid PVC runs helps accommodate this ground movement.

The cost for running underground electrical to a backyard shop in Calgary ranges from $2,500 to $6,000 depending on several factors. A basic setup with a 60A sub-panel, a few circuits for lighting and outlets, and a 20 to 25-metre underground run typically costs $2,500 to $4,000. A more robust workshop setup with a 100A sub-panel, multiple 20A circuits for power tools, a dedicated 240V circuit for a welder or compressor, and good LED shop lighting runs $4,000 to $6,000. Trenching costs $10 to $25 per linear foot by machine, and the trench must be inspected before backfilling to verify burial depth and cable protection.

Before digging, you must call Alberta One-Call at 1-800-242-3447 (or request a locate online) at least 3 business days before excavation. This free service marks the location of underground utilities — gas, water, sewer, telecom, and electrical — on your property. Digging without a locate is both illegal and extremely dangerous, particularly for gas lines.

Your electrician will perform a load calculation on your main panel to confirm it can support the sub-panel feeder for the shop. Homes with 100A panels may need a main panel upgrade to 200A before adding a shop sub-panel, especially if you already have high-demand loads like an EV charger, hot tub, or electric heating. Get matched with a licensed electrician through Calgary Electrical Services for a free estimate on your backyard shop wiring.