Calgary’s load-calculation step
Calgary publishes a load-calculation form for adding a secondary suite or laneway/backyard suite to an existing single-family property. The form asks for the existing dwelling and proposed suite details, including addresses and floor areas, then applies the listed Canadian Electrical Code demand inputs. Those inputs include heating and air-conditioning equipment, ranges, specified water-heating or spa loads, electric-vehicle charging, and other loads. Use the current form and a qualified electrical professional to determine which loads and code rules apply to the actual design.
Submit the completed calculation through the City’s electrical-inspection process. The form says to contact ENMAX if the calculated demand requires increasing a 60-, 100-, or 200-amp service, so the provider can check whether that service size is available. A calculation identifies a demand to review; it does not confirm that ENMAX can supply an upgrade or state its cost.
Keep the City, provider, and design decisions separate
Calgary’s general overhead-service information describes a separate utility coordination step. A development or building-permit circulation does not itself confirm the utility’s equipment locations or available capacity. Confirm whether the proposed work affects the overhead service, meter, conductors, service size, or utility clearances with the City and ENMAX before construction planning relies on an assumed route.
Keep the service calculation, the City’s submission or inspection response, and ENMAX’s capacity or upgrade response as separate records. Do not treat an existing meter, a permit application, or a completed form as approval to connect the added load. Service design and electrical work must be reviewed and completed under current requirements by qualified people.
For the broader process of checking provider, load, and address questions, see ADU electrical service, addressing, and capacity. Madison’s water and electric checks and New York City’s rules about shared utilities address different local questions; see Madison detached ADU utility capacity and New York City ADU utility controls.