Electrical for Calgary office buildings

CCT 01How an office building buys electrical work

Three buyers share most office buildings. The landlord, usually acting through a property manager and a building operator, owns the service, the switchgear, the risers and the floor electrical rooms. The tenant leases a suite and pays for the fit-out inside it, sometimes with a landlord allowance. In an office condominium the unit owner controls the suite while the corporation controls the shared electrical rooms. Each buys different work, and each has a different approver.

The lease documents set the rules. A landlord’s design manual or tenant criteria package typically states the electrical capacity allocated to each floor or suite, which trades the landlord requires for work on building systems, how panel and circuit changes are recorded, and what must be removed or restored at the end of the term. A work letter then says what the landlord delivers before the tenant takes possession. Read both before the space plan is drawn, because a layout that needs more power than the suite allocation is a negotiation, not a design detail.

Calgary mirrors this split in its permits: base-building work and tenant-space work take separate electrical permits ¹. A landlord’s riser upgrade and a tenant’s workstation circuits on the same floor are therefore inspected as different jobs, and often carried by different contractors.

CCT 02Where the base building ends and the suite begins

The boundary varies by building, but the pattern is consistent. The base building normally includes the utility service and main switchgear, bus duct or feeders up the risers, floor electrical rooms and the panels serving common areas, core and washroom lighting, the fire alarm system, emergency lighting and any generator, and the building automation system. The tenant scope normally starts at a suite panel or at breakers the landlord assigns, and covers branch circuits, receptacles, furniture feeds, suite lighting and controls, meeting-room and audio-visual power, the IT room and power for access control and security devices.

The disputes happen in the grey zones. Fire alarm devices inside the suite belong to a base-building system, and landlords commonly require their own fire alarm contractor to add or relocate them. Suite lighting controls may need to talk to the building automation system for after-hours schedules. A dedicated IT room may need supplemental cooling that the mechanical base building cannot serve, adding a load the tenant pays for on a circuit the landlord must approve. Name the party responsible for each grey-zone item in the scope, not just in the lease.

Where the landlord recovers suite electricity through submeters, those meters are revenue meters: they must be an approved type, verified and sealed before use ². A tenant adding a large load should ask how its consumption is measured before assuming the lease covers it.

Reel 04 · Conduit and tray · illustrative film

CCT 03Downtown and Beltline: fit-outs in occupied towers

The City’s data places most non-residential electrical activity in the centre. From 2023 to 2025, Downtown Commercial Core had 679 electrical permits at non-residential properties, the most of any community, and Beltline was second with 329 ³. In the downtown core, 631 of those permits were at properties the roll codes as commercial and 583 were contractor alterations to existing buildings, the signature of office fit-out and refurbishment work. More detail is on the Calgary commercial electrical data page.

Working in an occupied tower changes the scope as much as the drawings do. Expect to book the freight elevator and loading dock, work noisy tasks such as core drilling and chasing after hours, and follow the building operator’s rules for riser and electrical room access. A shutdown of a floor panel can affect neighbouring tenants on the same riser, so the landlord will want notice, a method statement and a restoration time. Price these conditions explicitly; after-hours premiums and escort costs are real parts of a downtown fit-out.

Older towers add discovery risk. Existing installations that met the code when installed do not have to be upgraded simply because a new edition is in force, but modified work must meet current requirements ⁴. A survey of the suite panel, the circuits being reused and the ceiling space before pricing reduces the surprises.

CCT 04Loads and capacity: what an office actually draws

Office suites are rarely limited by the building’s service; they are limited by the suite allocation, the spare breaker spaces in the floor panel and the route from the electrical room. The loads that move the design are specific: dense workstation layouts on furniture power, kitchens and coffee bars with dishwashers and water heaters, the IT room and its cooling, audio-visual walls, supplemental heating or cooling units and, increasingly, a few EV chargers in the parkade assigned to the tenant.

Start from the furniture plan and the equipment list, not from the previous tenant’s panel schedule. The designer turns them into a load calculation under Section 8 of the Canadian Electrical Code, which is in force in Alberta as CSA C22.1-24 for work permitted from April 1, 2025 ⁵, and compares it with the capacity the landlord allocated. Where the landlord needs to know whether the whole building can absorb a new load, the service capacity and headroom calculator shows the arithmetic from a recorded peak and a service rating. It does not replace the designer’s calculation.

A building-wide change, such as a new riser or a larger service, is base-building work. At 600 A and above the City requires plans and drawings ¹, and a service change brings ENMAX into the schedule.

CCT 05Lighting, controls and the energy code

Lighting is the part of an office scope that the energy code touches most directly. The National Energy Code of Canada for Buildings 2020 came into force in Alberta on May 1, 2024 ⁶, at Tier 1 for buildings outside Part 9 ⁶. Ask the designer to state which lighting power and control provisions apply to the alteration being priced, because a fit-out that replaces the ceiling grid and fixtures is treated differently from one that only relocates a few.

Controls deserve more attention than they usually get. Occupancy or vacancy sensing in enclosed rooms, daylight zones along the perimeter, scheduled shut-off and after-hours overrides all need a person who owns them after handover. Commission the controls with the tenant’s facilities contact present, and agree who changes schedules when working hours change. See lighting controls for the options.

On the base-building side, landlords replace corridor, core, stair and parkade lighting as capital work. The LED lighting retrofits page covers fixtures versus kits. Funding is thin: ERA’s Energy Savings for Business program has allocated all its funding ⁷, and Calgary’s Commercial CEIP, which can finance up to $1,000,000, has its intake paused ⁸.

CCT 06Typical office scopes and where they sit

For budgets, the electrical cost per square foot guide explains why a per-area figure for an office fit-out hides the drivers that matter: density of workstations, reuse of existing circuits, ceiling access and after-hours work. As context for older quotes, Statistics Canada’s non-residential electrical cost index for Calgary stood at 111.3 in the second quarter of 2026, against a 2023 base of 100 ⁹. It is an index of contractor input costs, not a dollar price.

CCT 07Permits and working in an occupied office

A change of use needs a development permit before the building permit can be issued ¹⁰. For an ordinary office fit-out, the City may issue a building permit for a complete minor tenant improvement within 21 calendar days ¹¹, and describes a typical range of 21 to 49 days for interior renovations ¹⁰. Each trade then pulls its own permit ¹⁰. Fire alarm alterations need both a building permit and an electrical permit ¹, and a verification to CAN/ULC-S537 ¹². The tenant improvement process guide sets out the full sequence.

In an occupied office, schedule interruptions with the tenant’s IT lead, not only the office manager. Identify equipment that needs a controlled shutdown and restart, such as servers, network switches and access control, and confirm who is on site when power returns. If the work needs the utility outside ENMAX’s weekday hours, ENMAX bills off-hours work at $352 per hour ¹³.