Electrical work for new commercial buildings in Calgary

CCT 01New buildings are the smaller share of Calgary’s commercial work

New commercial buildings are a minority of what Calgary’s commercial construction market does. In the City’s building permit data, 95% of the commercial and industrial building permits issued from 2023 to 2025 were for improvements to existing buildings rather than new buildings.¹ In 2025 the City issued 1,976 commercial and industrial building permits with a combined estimated project cost of $1.56 billion;¹ 107 of them were for new commercial buildings and 18 for new industrial buildings.¹

The electrical data points the same way. Where the permit address matches the City’s assessment roll, contractor new-construction permits made up 2,235 of the 9,114 electrical permits at non-residential properties from 2023 to 2025.² One new-construction permit can cover an entire building, so these are counts of permits, not of projects or their value.

Estimated project cost is the applicant’s estimate for the whole building, not the electrical scope, and a few large permits swing the annual total. Contains information licensed under the Open Government Licence – City of Calgary.

CCT 02The electrical sequence of a new building

1. Utility feasibility. Confirm with ENMAX where the supply comes from, what voltage is available and where the transformer can go, while the site plan can still move.
2. Design. Service size, distribution voltage, metering, the electrical room, and provisions for future tenants. The service capacity calculator gives a first check on load.
3. Utility application and estimate. ENMAX designs its side and issues a written estimate.
4. Temporary construction power. Energized early to run trailers, tools, hoists and heat.
5. Procurement. Switchgear, transformers and generators are ordered against approved submittals; their lead times usually set the critical path.
6. Underground and rough-in. Inspections before backfill and before walls and ceilings close.
7. Permanent service and final inspection. The site is approved before ENMAX energizes it.
8. Commissioning and occupancy. Integrated testing of life-safety systems, then the occupancy permit.

Energization and commissioning are milestones in their own right, distinct from equipment delivery. A schedule that shows only “electrical rough-in” and “electrical finish” hides the dates that actually move. The design-build page covers how the design stage can overlap procurement.

CCT 03Temporary construction power

Most sites need power months before the permanent service exists. In Calgary, every temporary construction service, whatever its size, must have an HRC (high-rupturing-capacity) fused disconnect switch ahead of the meter.³ The customer provides, owns and installs a CSA-approved meter socket or enclosure,⁴ and ENMAX restricts contractors from handling meters.³

Temporary power is costed differently from a permanent connection. ENMAX may decline to invest in a service expected to be used for 2 years or less and charge the full cost of facilities, installation and removal, less reusable material.⁵ Budget it as a site cost of its own, not as part of the permanent service.

Size it for the real construction loads: site offices, tools, hoists and cranes, pumps, and in winter the heaters that keep concrete, drywall and finishes workable. Calgary’s January design temperature is −30 °C,⁶ so a winter build can draw far more on temporary power than the summer plan assumed. Decide early whether temporary heat is electric or fuel-fired, because that choice sets the temporary service size.

Outside the city limits, Rocky View County, Airdrie and other neighbours have their own permit authorities and often a different wire utility, so the rules above may not apply there.

CCT 04The ENMAX application, investment and connection formula

Start the ENMAX conversation at the development permit stage, not after the building permit. ENMAX does not confirm electrical capacity when it reviews a circulated development permit,³ so an approved development permit says nothing about whether the supply is there.

ENMAX prices each connection individually. The customer pays by formula: removal cost less salvage, plus installation cost, less ENMAX’s investment in new load, plus 20% prepaid operation and maintenance on optional facilities, plus other costs.⁵ ENMAX gives a written estimate of the cost, its investment and the customer contribution, itemized by component when the estimated cost exceeds $25,000.⁵

The investment is a credit against the utility’s cost, not a price for the connection. For 2026 it is $14,675 per meter for small commercial (D200) new load.⁷ Medium and large commercial (D300 and D310) customers may instead take $367, $245 or $122 per kVA of minimum contract demand on 15-, 10- or 5-year agreements, up to 80% of anticipated maximum demand.⁷ A longer term earns more credit but commits the building to that demand, so the owner should set it from a realistic leasing and load forecast, not the nameplate of the service.

Two metering points follow from the design. Services over 200 A need ENMAX’s current-transformer request form and checklist,⁸ and ENMAX installs interval meters at new sites planned at 150 kVA or more.⁵ Once the site exists, a new ENMAX site ID can take up to 48 hours to reach retailers,⁸ so arrange the energy retailer before the energization date. The ENMAX connection guide and the CT metering explainer go document by document.

CCT 05Who carries what on a new build

Calgary requires separate electrical permits for base-building work and for tenant spaces,³ so decide early which scope stops at the tenant panel. That line later becomes the boundary every fit-out works to.

CCT 06Code, energy and life-safety design

A new building is designed to the codes in force on its permit date. Installations permitted on or after April 1, 2025 must meet the 2024 Canadian Electrical Code.⁹ Calgary requires plans and drawings for new construction with services of 600 A and higher,³ and whether the building needs authenticated drawings follows the building code’s professional-involvement rules; business, mercantile and industrial buildings of 3 storeys or less are exempt only up to set areas, for example 500 m² at one storey.¹⁰

The commercial permits guide covers plans review and inspections. The energy code shapes the electrical design more than many owners expect. Alberta brought the National Energy Code of Canada for Buildings 2020 into force on May 1, 2024,¹¹ and adopted its Tier 1 as the minimum for buildings outside Part 9.¹¹ In practice that sets limits on lighting power and expectations for automatic controls, which affect fixture choices, control zoning and commissioning effort. The lighting controls page explains what that means on site.

Life-safety systems run on their own track. The building code requires fire alarm systems to be verified to CAN/ULC-S537,¹² and that verification report is needed before occupancy, so book it into the schedule rather than discovering it at the end.

CCT 07Inspection first, then energization

ENMAX will not energize a new site until the electrical inspection authority has approved it, following the ENMAX metering standard, and energization is requested through the retailer.⁸ If an energization attempt fails because of deficient equipment, unsafe conditions or code non-compliance, ENMAX charges $90.00 for the extra service trip,¹³ and the lost day on site costs far more.

City inspection costs can also land late: a re-inspection is $327 including fees and GST,¹⁴ and a weekend or statutory holiday inspection is $189 per hour with a $756 minimum.¹⁴ After every required inspection is signed off, the contractor books the final inspection through 311 for the occupancy permit, and new businesses receive their business licence after it.¹⁵

Reel 08 · Substation, dusk · illustrative film

CCT 08Budget drivers and turnover

New-build electrical budgets are often set per square foot early and never revisited. The number hides the drivers that actually move it:

• the ENMAX customer contribution after investment, and any civil work the estimate leaves to the owner;
• temporary power, including winter heat;
• service size, distribution voltage and the number of meters;
• tenant provisions: how complete each suite is left at turnover;
• standby power, fire alarm and energy-code controls;
• long-lead equipment and the schedule premium for late decisions.

Statistics Canada’s electrical-division index for Calgary non-residential buildings stood at 111.3 in the second quarter of 2026 (2023 = 100);¹⁶ it shows input-cost movement, not a price. On payment, the owner retains a 10% holdback for 60 days under Alberta’s prompt payment and lien law.¹⁷ See the cost per square foot guide and the prompt payment and holdback guide.

At turnover, the owner needs record drawings, the single-line diagram, settings, test and inspection records, warranties and training. The emphasis varies: warehouses plan for forklift and fleet charging, office buildings for tenant metering and base-building distribution, and multi-family buildings for suite metering and parkade EV readiness.