Buying a home: the electrical check

CCT 01Why the age of Calgary’s housing matters

Calgary has a large stock of older homes. The 2021 Census counted 43,855 occupied dwellings built in 1960 or earlier¹ and 133,035 built between 1961 and 1980.¹ Together that is 35.2% of the city’s occupied dwellings.¹

The census does not record service size, panel brand or wiring type, so no one can tell you how many Calgary homes still have a 60 A service or aluminum branch wiring. What age tells you is probability. A house built in 1965 is more likely to have its original service, fewer circuits, ungrounded receptacles in places, and decades of additions by previous owners. A newer house is more likely to have a modern panel, but its service was often sized for a gas-heated home, and the question becomes whether it can take an EV charger or a heat pump.

Census figures describe the whole stock. The house you are buying has its own history, and the rest of this checklist is about finding it.

CCT 02The checklist

Do not open the panel to answer these questions. Read the door label and the main breaker handle, photograph what you can see, and leave the rest to an electrician. The older panels guide and aluminum wiring explain two items insurers commonly ask about, and smoke and CO alarms covers what current code requires.

CCT 03An older house does not have to be brought up to code

Buyers are often told a house must be “brought up to code” before sale. In Alberta, that is not how the electrical code works. An existing installation that complied with the code in force when it was installed generally does not have to be upgraded when a new edition arrives.⁴ No Alberta rule we found requires an electrical inspection when a house is sold.

Two things change the picture. First, when work is done, the new or altered part is inspected against the code in force when the permit is issued: the 2024 edition for permits issued on or after April 1, 2025.⁵ Second, insurers and lenders are not bound by the code. They can set their own conditions on a panel, a wiring type or a missing permit, and those conditions can arrive before closing.

The practical rule: an older installation is not illegal because it is old. An installation that was never permitted or inspected is a different matter.

CCT 04Checking the permit history

Ask the seller for the permits behind any renovation, and for proof each one closed with a final inspection. Then check what the City holds.

• myProperty. For single family residential properties, the City’s myProperty map shows the last 10 years of permit activity; for commercial and multi-residential properties, the last 3.⁶
• Property research request. For older records, a 311 property research request draws on building permits, trade permits, real property reports and other files. The City charges a base fee of $65 for one residential record, and copies of historical permit documents need the registered owner’s authorization.⁷ As a buyer, ask the seller to request them or authorize you.
• Open data. The City’s electrical permits and inspections dataset lists electrical permits from May 2018 onward, with inspection outcomes, updated daily.⁸

One common misunderstanding: a City Certificate of Compliance on a real property report is about the Land Use Bylaw, such as where structures sit relative to property lines. The City says it does not check that permits for improvements were obtained and inspected.⁶ A clean certificate says nothing about the basement wiring.

CCT 05Unpermitted basements and hidden wiring

The expensive surprise in Calgary resale is a finished basement, or a suite, with no electrical permit. Here the rules are firm. If wiring was installed without a permit and is now concealed behind drywall, the City will not issue a homeowner permit for it. The owner must hire a licensed electrical contractor, and the inspector may ask for drywall to be removed so the work can be seen.⁹

The cost is not the permit. It is opening walls, correcting what the inspector finds and finishing again, and nobody can price that until the walls are open. That is what to negotiate on, or ask the seller to resolve before closing.

Suites raise a second question: capacity. For a secondary suite, the City asks for an electrical load calculation sheet, and if the service must be increased from 60, 100 or 200 A, the contractor contacts ENMAX.⁹ A basement kitchen on a small service can be the first thing a future permit exposes. See basement and renovation wiring and the homeowner permit guide for what the owner can and cannot fix personally.

CCT 06Home inspector or electrician?

A general home inspection is visual and broad. Many inspectors remove the panel cover and note obvious defects, and a good report flags items for “further evaluation by a qualified electrician”. That phrase is the signal to book one before conditions come off, not after possession.

An electrician’s pre-purchase visit goes further: confirming the service size and panel condition, testing receptacles for grounding and polarity, looking for aluminum terminations, checking for signs of heat, and giving a view on whether the service can carry what you plan to add. It does not certify the house; no private visit can. No public body publishes a standard price for it. What drives the cost is the size and age of the house, access, and whether you want a written report. See inspections and troubleshooting and electrician rates in Calgary.

CCT 07If you plan an EV charger, heat pump or hot tub

Buyers increasingly buy for what they will add. A Level 2 charger, a heat pump, air conditioning or a hot tub each adds large load, and the service decides whether it fits. Natural Resources Canada says a 200 A service is normally required for an all-electric heat pump.¹⁰ A load calculation, not a rule of thumb, answers the question for a specific house; try the home load calculation, then read 100 A vs 200 A service.

If an upgrade is needed, ENMAX Power prices each service change individually. For 2026 it invests $3,168 per residential service toward new load, and the customer pays the actual connection cost above that.¹¹ That is a credit toward the utility’s side, not the price of an upgrade, and the electrical contractor’s work is separate.

Townhouses and condos add a governance step. Homeowner permits are not available in apartment-style condominium buildings,⁹ and adding load to a rowhouse on a shared gang meter needs an authorization form signed by the condo board or homeowner association.¹² Read the bylaws before you assume you can install a charger.