Electrical permits for contractors

​​There are several options available for booking an electrical inspection.

• Contractors can log into VISTA to book an inspection. 
• Contractors and homeowners can use the Inspections Booking System to book an inspection. You will need a myID or VISTA account. 

If you require assistance with managing your inspection booking or setting up a myID account, you can call the Inspections Call Centre at 403-268-5311. They are available Monday to Friday, 7 a.m. to 4:15 p.m.

When requesting an inspection, please provide:

• a description of the work
• the permit number (eg. BPYEAR-00000, EPYEAR-00000)
• the address of the job
• the inspection type for residential (eg. final, rough)
• the inspection type for commercial (eg. final, rough, underground, service)
• site details such as access, pets, work area, etc.

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Visit secondary suites and backyard suites for detailed information about inspections for electrical permits. Please calculate the electrical load requirements for your suite, and provide this information either to The City or ENMAX, depending on requirements.​

Electrification is the process of upgrading a home to use more electrical power. This may be upgrades to accommodate electric vehicle (EV) charging, electric heat pumps, air conditioning (AC) units, electric heat or battery storage systems. Appliances such as hot tubs can also significantly increase the electrical load in a home. Electrification requires planning, an electrical permit and professional installation from a registered electrical contractor.

Some homes can handle the demand for more electricity, while homes that share electrical services may require electrical service upgrades or an energy management system (EMS) (see tab on EMS]

The process for installing a new heat pump, AC or EV charger is as follows:

Step 1: Choose the home type to confirm your permit requirements:

• Single family / Semi-detached home
• Rowhouse, townhouse, condominium or apartment

Step 2: If your home has enough electrical capacity for the added load, you can apply for an electrical permit.

New*- If you are submitting a permit for a rowhouse with gang meter base electrical service you are required to submit a copy of the Row Housing Electrification Authorization form signed by the condo board or homeowner association. This form indicates that the electrician has completed a load calculation and confirms that the overall electrical service has enough capacity to accept the additional load. Condo board or homeowner association sign-off on the additional load is also required.

Depending on the type of equipment, there may be other permits required:

If the home cannot support the additional electrical load and an EMS is required, please review the related permit requirements.

Step 3: Installation

Installation must be done per the load calculation and Part 1 of the Canadian Electrical Code requirements. Installation can only be completed by a professional electrician familiar with the requirements.

*New- If your project includes an energy management system, complete your load calculation using:

• Single Family / Semi-detached homes load calculations
• Rowhouse / Condominiums load calculations

Step 4: Inspection

Inspections are booked online using the Inspection Booking System.

Rowhouse electrical services:

Units within a rowhouse receive electricity through a gang meter base or a fee simple service.

A gang meter base service is when a single electrical service runs directly from the ENMAX transformer to the shared gang meter base. The service is then split, and a cable takes electricity from the gang meter base to each home. The gang meter base can only provide a calculated amount of electricity to each home based on the load capacity determined at the design phase. Based on the design calculation and service, future electrical capacity is often limited.

A fee simple service is when the electrical service connects directly from the ENMAX transformer to each home. This type of service has more electrical capacity for the future, compared to gang meter base service, because each home is connected directly to the ENMAX transformer. A load calculation needs to be performed when adding load to understand the electrical capacity of the home’s electrical service.

If you are planning an electrification project on a rowhouse with gang meter base electrical service, you are required to submit a copy of the Row Housing Electrification Authorization form signed by the condo board or homeowner association.

1. Check the home’s electrical capacity
2. If the home has enough electrical capacity for the added load the electrician can apply for the permit.
3. If the home does not have enough electrical capacity for the added load there are two options:
   1. Upgrade electrical service (ask your electrician to contact Enmax), or
   2. Install an EMS that shares the available electricity in your home among the different appliances
4. If installing EMS, you must follow specific requirements to ensure the system is safe and permit ready

Home electrification is growing fast in Calgary; however, a home has limits on how much electrical load can be added to the existing electrical service without a service upgrade. A potential option to avoid a costly service upgrade is to install an Energy Management System (EMS). For those charging electric vehicles at home, Electric Vehicle Energy Management Systems (EVEMS) are also an option.

EMS/EVEMS is a means used to control loads through the process of connecting, disconnecting, increasing, or reducing electric power to the loads and consisting of any of the following: a monitor(s), communications equipment, a controller(s), a timer(s), and other applicable device(s).

If installing an EMS/EVEMS, follow specific requirements to be permit ready and ensure the system is safe:

Step 1: Check if the model you will be installing is in the ULC-ORD-3141 certified or City of Calgary accepted models list:

• These models have either achieved ULC-ORD-3141 certification or have been reviewed and accepted by City electrical inspectors on an interim basis until ULC-ORD-3141 certification is obtained.

Step 2: Complete the load calculations:

• When applying for a permit that includes EMS or EVEMS, you must provide a load calculation to the City of Calgary’s electrical inspections team after receiving your permit number. There are two ways to fulfill this requirement:
  • Using a listed model: EMS/EVEMS on the ULC-ORD-3141 certified or City of Calgary accepted models list , do not require a load calculation.
  • Using an unlisted model: If your model is not on the accepted list, follow the load calculation steps provided for your specific home type:
    • Single Family / Semi-detached homes load calculations
    • Rowhouse / Condominiums load calculations
• Submit your load calculation to electrical.inspection@calgary.ca once your permit number has been issued along with the permit number and address. The electrical inspector may request to see your load calculations during an inspection.
• If using a model that is not included on the accepted model list, you can request a review by emailing electricaltac@calgary.ca

Step 3: During installation, use the EMS installation safety checklist to ensure all safety requirements are met

• This checklist details the requirements for the installation to uphold electrical safety standards. Be sure every item on the checklist is addressed to ensure a safe and compliant installation.
• A properly installed energy management system helps prevent electrical service overload and reduces the risk of fire. 

For further inquiries or to send us feedback on these guidelines, contact our Technical Advisory team at electricaltac@calgary.ca 

The ULC-ORD-3141 certification process is open for EMS and EVEMS products. As this process is new, The City of Calgary has developed a list of models that will be accepted on an interim basis until ULC-ORD-3141 certification is obtained. This table contains both models that are ULC-ORD-3141 certified and models that are accepted by The City as of June 2026. Required certification date is to be determined.  

The table will be updated as products achieve certification. Manufacturers can notify The City once certification is obtained or can request a review of their model for the accepted models list by emailing electricaltac@calgary.ca.

Learn more about the ULC-ORD-3141 certification process.

All electrical installations in any new or renovated buildings requires an electrical permit(s). Before the work begins, a certified electrical contractor must apply for the permit(s) and complete the work. Permit applicants must:

• hold an Alberta Master Electrician Certificate;
• have a City of Calgary business licence;
• complete the City Qualified Trade application process

For more information, review the Safety Code Permit Bylaw or calculate your permit fees and the building and trade permit fee schedule​.
When applying, it’s important to identify the electrical permit category and type(s). More than one permit category can be selected for each permit.

Permit categories include:

• Air conditioning unit
• Detached garage
• Electric vehicle charging
• Emergency generator install (new)
• Emergency generator replacement
• General wiring
• Hot tubs
• Pools
• Secondary suite/backyard suite
• Service
• Temporary service
• Heat pump
• Air conditioner

Your job may require multiple permit types. Permit types include:

• Electrical permit
• Annual permit (commercial)
  • An annual permit is required if your facility employs a full-time journeyman electrician. An electrical contractor conducting maintenance work at a facility may also apply for an annual permit.
• Single construction permit (residential)
  • This permit is issued to the builder. A separate electrical permit is required for work that is not covered under the single construction permit.

In addition to the electrical permit, other permits may be required for work involving solar photovoltaic, factory built structures (skid units), communications (phone and data), fire alarms and signs.

An electrical permit and building permit are both required to alter or install a fire alarm.

Permit requirements:

A separate electrical permit is required for:

• Commercial space
  • Base building (including individual bays, fire alarm, HVAC and emergency lighting).
  • Tenant spaces
• Multi-family, low and high-rise buildings, the permit scope may include the base building and all dwelling units (buildings consisting of several dwelling units and served by a public corridor or common exit stairs).
• Each dwelling unit of a multi-family stacked residence and a separate permit for the base building.
• Each dwelling unit of row housing (dwellings that have individual access to the street).

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Submission of plans and drawings

There are three situations where submitting plans and drawings is required:

600 amp services

The City of Calgary requires that plans and drawings be submitted for new construction or service upgrades of 600 amps and higher, including all high voltage installations.

Please email the plans examination checklist with your application, and ensure that your single line diagram or manufacture shop drawings include the following:

• fault current at all over-current devices
• service characteristics and all ratings of over-current devices for all service and distribution equipment
• all panels and over-current devices to indicate if series-rated combination is used
• permit application requirement list with permit confirmation email

Underground service conductor installations - commercial

Contractors are required to submit plans for installing underground service conductors, as specified in the Canadian Electrical Code or as calculated by the IEEE 835 standard - Rule 4-004, ampacity of wire and cable for underground installations.

The IEEE835 standard does not apply to installations supplied from the ENMAX network.

Please submit the plans examination checklist with your application. For more information, contact 311 and ask for the Technical Assistance Centre (TAC).

Solar photovoltaic

All solar photovoltaic installations within the city of Calgary require a completed  solar photovoltaic electrical permit checklist.

Shop drawings may be emailed to The City of Calgary.

Underground inspections for single construction permit applications - residential

A City of Calgary safety codes officer will conduct spot checks of underground installations on single-family and semi-detached dwellings in the pre-backfill phase.

The rigid PVC conduit from the coil location to the meter base must be sized as follows. The conduit cannot contain more than two bends.

Overhead services

Please ensure that exposed service conductors are either higher than windows, doors and porches, or a clearance of one metre or more must be maintained for windows. The service attachment point cannot exceed 5.5 metres from finished grade level.

Existing hot splitters - commercial

When a load is added to an existing hot splitter, the following applies:

• A disconnect switch marked, “Suitable for Service Entrance Equipment” shall be installed between the existing splitter and the utility service drops. The switch will be called a “Service Supply Disconnect Switch.”
• The disconnect switch is to be either a standard enclosure, protected by a metal cabinet with metal doors, or an Enclosure Type 3R for outdoor use.
• The disconnect and metal raceways will be grounded by using the neutral conductor for bonding all metal parts.
• The disconnect is to be protected from mechanical damage where installed in alleys or similar locations.
• Fuses shall be sized to the ampacity of the existing splitter or service conductors, whichever is smaller, and shall be of a high rupturing capacity (HRC) type fuse.

Temporary construction services

All temporary services, regardless of size, are to have an HRC fused disconnect switch in front of the meter. ENMAX will not energize any hot sequence metered construction where the service switch is located after the meter. Temporary construction services cannot feed new homes except with special permission.

Illegal bypass of meter

When electrical service conductors are purposely damaged to bypass the electrical service meter or the main over-current device, the service conductors must be completely replaced from the point of connection to the electrical utility power supply. Damaged underground cables must be replaced to the property line and damaged overhead conductors must be replaced to the weatherhead. For extenuating circumstances where the service conductors cannot be removed or replaced, permission from The City of Calgary’s electrical inspection section is required.

Main service panelboard without a main disconnect

Sub-panels cannot be added to an existing service panelboard that does not have a main disconnecting device. These panelboards were originally approved for installation where the number of branch circuits was limited.

Flood plain

When installing services in a floodway or floodplain, the main electrical service must be installed above the flood level in accordance with Calgary’s Land Use Bylaw (1P2007) – see the section titled Building Design in the flood Fringe. Check with a general contractor to see if you are on a floodway or floodplain.

Electrical load calculation

Use the secondary suite electrical load calculation sheet to ensure your current electrical service is adequate. When complete, please email the form to us. If the main electrical service must be increased from 60 amps, 100 amps or 200-amp service, please contact ENMAX.

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Obtaining an electrical permit from The City of Calgary is the first step before beginning an electrical job. In addition to obtaining a permit, it is important to contact ENMAX prior to beginning work. ENMAX instituted a policy restricting electrical contractors from handling meters and cutting secondary supply connections.  Please review inspection requirements​ on how to energize electrical services. For residential service changes or repairs, please review the residential service disconnect/reconnect procedure before starting work.

Please note that a separate permit and inspection must be obtained for residential single construction if the service requirements are greater than 200 amps.

On underground services where repairs or alterations are required on the line side of a hot sequence utility meter, contact ENMAX at 403-514-6100.

For a single family or semi-detached homes in the inner city, please contact ENMAX early in the development process to reduce construction delays. You must confirm that ENMAX has sufficient infrastructure and capacity to provide electrical services to the development. When the development permit is circulated to ENMAX for review, they do not check or confirm if they have capacity to accommodate the proposed electrical service requirements.​

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In the event an electrical service is damaged on a residential, commercial or industrial property, the repairs must be completed by a licensed and registered electrical contractor who holds an electrical permit from The City of Calgary.

When a service must be disconnected from the electrical utility, ENMAX meter handling restrictions apply.

In the event your electrical service is not damaged but the power is out, please contact ENMAX Trouble to report an outage at 403-514-6100.​

A person may require a variance to use alternate practices not recognized in the codes, or to permit the installation and use of unapproved electrical equipment in a specialized application. Please see the electrical variance form  to apply, send the completed variance form to electrical.inspection@calgary.ca. For further information about variances, see Alberta STANDATA. ​

• Alberta Municipal Affairs - Alberta permit regulation
• Alberta Municipal Affairs – electrical STANDATA
• Alberta Municipal Affairs
• Alberta Municipal Affairs – Safety Codes Act
  
• Building Regulation advisories, bulletins and variances
• CSA Group
• Electrical Contractor Association
• Electrical Inspectors Association of Alberta​
• Safety code permit bylaw ​
• ENMAX -metering standards
• ENMAX – network boundary map
• ENMAX – network servicing policies and guidelines
• Guide to returning to your home or business after a flood​
• Safety Codes Council
• Service Alberta: Consumer information/landlord and tenants