Hot tub retailers are great at selling the tub and vague about the electrical line item. Here's exactly what the wiring involves in Ontario, and what it costs.
What code requires — and why it's strict
Water plus electricity earns the strictest rules in the Ontario Electrical Safety Code. A 240V hot tub needs its own dedicated circuit (nothing else on it, ever), GFCI protection at the breaker, and an outdoor-rated disconnect switch within sight of the tub and at least 1.5 metres from the water — so anyone servicing it can verify the power is off. The feed itself runs in appropriately rated cable or conduit, buried to code depth if it crosses the yard. Metal components near the tub get bonded, same principle as pool bonding: no voltage differences anywhere a wet hand can reach.
None of this is optional, and all of it goes through an ESA permit and inspection. Insurance is the practical enforcer here — a tub fire or shock incident on an unpermitted hookup is exactly the claim insurers deny.
What it costs in the GTA
A typical installation — 50A GFCI breaker, 6 AWG copper from the panel, disconnect, weatherproof terminations, ESA notification — runs $1,000–$2,000 depending on the distance from panel to tub and whether trenching is needed. Long runs across a backyard with conduit and burial push toward the top of the range. The quote question that matters most: does your panel have 50–60 amps of spare capacity? We run the load calculation up front; if the answer is no, options include load management or a 200-amp upgrade, and you want that conversation before the crane drops the tub in the yard.
Plug-and-play tubs: the honest trade-off
120V "plug-and-play" tubs exist precisely to avoid this wiring — and even they require a dedicated GFCI outlet with nothing else on the circuit. The compromise is performance: a 120V heater adds roughly 1°C per hour and loses ground with the jets running on a cold night. In our climate, most plug-and-play owners convert to 240V within a couple of seasons, so if the budget allows, wiring it properly once is the cheaper path.
Send us the tub's spec sheet and a photo of your panel and we'll quote it accurately, usually same-day: request a quote or call 416-837-4038. Planning a pool or swim spa instead? The pool wiring requirements are a level up again — we do those end-to-end too.