Design-build electrical work in Calgary

CCT 01What design-build changes

In a design-build electrical contract, one firm is responsible for both the design and the installation. The electrical contractor either employs the engineer who designs the system or subcontracts the design to an engineering firm, and the owner signs one contract instead of two.

The alternative most owners know is design-bid-build: the owner hires an electrical engineer, the engineer produces a complete set of drawings and specifications, contractors bid on those documents, and the lowest compliant bidder builds what is drawn. A middle route, often called design-assist, has the owner’s engineer design while a contractor is brought in early to advise on constructability and price.

Design-build suits work where the owner can state what the system must do but does not need to control how it does it: a tenant fit-out on a tight schedule, a warehouse service, an equipment addition in a plant, or a parkade EV project. It suits less well a building where the owner wants independent design advice, several comparable bids on the same drawings, or tight control of equipment choices. The engineer versus contractor guide covers the buyer’s decision in more depth.

CCT 02Design-build versus design-bid-build

The last row matters most. A design-build contract changes who pays the designer. It does not change when drawings are required, who must authenticate them or what the City reviews.

CCT 03When the design needs drawings and an engineer’s stamp

Two separate rules decide whether a design-build job needs formal drawings and whether a registered professional must authenticate them.

The City’s electrical drawings rule. Calgary requires plans and drawings for new construction or service upgrades of 600 A and higher, including all high-voltage installations.¹ For those services, the single-line diagram or shop drawings must show fault current at every overcurrent device, the service characteristics and ratings, and any series-rated combinations.¹ That is engineering work, whoever employs the engineer.

The building code’s professional-involvement rule. Whether an architect or engineer must design and stamp a project is governed by Division C of the Alberta building code.² Business, mercantile and industrial buildings of 3 storeys or less need no registered professional up to 500 m² (about 5,380 ft²) of building area at one storey, 250 m² at two and 165 m² at three.³ Alberta’s current STANDATA quoting the article (May 2026) confirms these limits, sets lower ones for assembly, care, treatment and detention occupancies (300 m² at one storey), requires authenticated drawings and specifications for buildings above them, and lets the authority require a registered professional where a project’s size or complexity raises special safety concerns.⁴

Fire alarm work is its own case: where professional involvement is required, Calgary expects stamped drawings or letters from an Alberta professional engineer, including a final verification.⁵ The fire alarm systems page covers that path.

CCT 04Who does what on a design-build electrical job

Only a master electrician can obtain an electrical permit in Alberta,⁶ so the permit sits with the contractor on every delivery model. The design responsibility is what moves, and the contract should say where it lands.

CCT 05Write the owner’s requirements before asking for a price

Most design-build disputes start with an owner who described a result and a contractor who priced a different one. A short requirements document prevents that. It should cover:

• Loads and use. The equipment list with nameplate data, the operating pattern and any future load the owner wants provided for, such as EV charging.
• Spare capacity. How much room to leave in the service, feeders and panels, stated as a requirement rather than left to each bidder.
• Distribution voltage and metering. The 120/208 V versus 347/600 V guide explains why this choice changes the whole design; suites and tenants may need separate metering.
• Equipment standards. Acceptable manufacturers, breaker types, labelling, and whatever the owner’s maintenance staff already stock.
• Energy code. Alberta brought the National Energy Code of Canada for Buildings 2020 into force on May 1, 2024,⁷ at Tier 1 for buildings outside Part 9.⁷ Lighting and controls must be designed to it.
• Reliability and maintenance. Standby power, redundancy, and access for future maintenance and infrared scanning.

Existing buildings need one more item: an investigation of existing conditions, paid for as its own stage. The service capacity calculator gives a first check of whether new load fits; the design still needs a code-based load calculation.

CCT 06Permits, utility and code on a design-build job

Design-build overlaps design, permits and procurement, which is where it saves time, but it cannot skip any of the approvals.

• Permits. Calgary requires separate electrical permits for base-building work and for tenant spaces.¹ The trade permit fee is $112 processing plus $9.79 per $1,000 of construction value,⁸ and construction value counts labour and material, including owner-supplied material.⁸ Non-residential permits can also attract additional plans review at $119 per hour,⁸ so a complete first submission saves money.
• Code edition. Work permitted on or after April 1, 2025 must meet the 2024 Canadian Electrical Code.⁹
• Utility. ENMAX does not confirm electrical capacity when it reviews a circulated development permit,¹ so the design-builder should ask ENMAX directly and early. Services over 200 A need ENMAX’s current-transformer metering forms.¹⁰

Outside Calgary the rules change: Rocky View County, Airdrie and other neighbours have their own permit authorities and may be served by a different wire utility. The commercial permits guide and the ENMAX connection guide cover the City and utility steps.

CCT 07Pricing design-build fairly

A fixed price on a design that does not exist yet is either padded or wrong. Better practice is to price in stages:

1. a fee for investigation and design development to an agreed level;
2. a fixed or maximum price once the design is developed enough to count equipment and routes;
3. a change process that states both cost and schedule effects when the owner or existing conditions change the scope.

When several design-builders propose, ask each to state its assumptions in the same format: service size, spare capacity, equipment manufacturers, allowances and exclusions. Per-square-foot figures hide those differences; the electrical cost per square foot guide explains why. Statistics Canada’s electrical-division index for Calgary non-residential buildings stood at 111.3 in the second quarter of 2026 (2023 = 100);¹¹ it tracks contractors’ input costs and is not a price.

Reel 05 · Feeder pull · illustrative film

CCT 08Handover: the design record belongs in the deliverables

A design-build job should hand over the design as well as the installation: record drawings that match what was built, the single-line diagram with fault-current figures, load and voltage-drop calculations, protective device settings, stamped documents where they were required, and the permit and inspection record. Confirm in the contract that the owner may use those documents for future maintenance, alterations and tenders with another contractor.

The emphasis differs by building. Office buildings need base-building and tenant scopes kept apart, plants need the motor and control design documented for the maintenance crew, and retail fit-outs must fit landlord criteria and sign rules.