A home’s purchase price and its operating cost are two different numbers, and they are barely connected. The price is agreed once, while the cost of heating, insuring, taxing, and maintaining the home runs for as long as you own it and is set mostly by things a buyer never sees, like the age of the home and how well it holds heat. Space heating alone is about 63 percent of a Canadian home’s energy use, so two houses at the same price can cost very different amounts to run. This article explains why an affordable home can be expensive to live in, and how to estimate a home’s running cost before you commit.
Two Homes, Same Price, Very Different Bills
The price of a home is a single number, agreed on one day, after weeks of scrutiny. Buyers order inspections, compare the home against recent sales, and negotiate over a few thousand dollars. The cost of living in that home is a different number entirely. It arrives in monthly pieces, it runs for as long as you own the place, and almost no one checks it before signing.
Most of what makes a home cheap or expensive to run is invisible at the showing. Space heating alone accounts for about 63 percent of the energy a typical Canadian house uses, and that share is set by the building envelope: the insulation, the air leakage, the age of the structure. A freshly painted wall and a leaky, under-insulated wall look identical. Two homes of similar size and price can carry very different operating costs, because a home built to a high standard can use up to 80 percent less energy for heating than an average one. The neighbourhood and the asking price can match while the bills do not. Understanding those differences before you buy is exactly why virtual home energy assessments are becoming an important first step for homebuyers.
Why No One Checks the Operating Cost
The gap persists for a structural reason. The purchase price gets examined from every angle because the entire transaction is built around it. The operating cost gets examined by no one, because nothing in the process requires it. An EnerGuide evaluation in Canada is voluntary, and it rarely comes up during a sale. So the buyer takes on one of the largest ongoing expenses of ownership without ever being shown a number for it.
The Costs That Don’t Show Up on the Listing
The running cost is not only energy. Property tax, insurance, and maintenance sit on top of it, and several of those are climbing faster than incomes. Home and mortgage insurance premiums in Canada rose 45 percent between late 2019 and late 2025, well ahead of overall inflation, driven largely by extreme weather and rising rebuilding costs. Research conducted with the University of Toronto attributes more than half of the home insurance increase since 2008 to climate change, around 533 dollars a year for the average homeowner. Maintenance follows the same pattern. A common budgeting guideline sets aside roughly one to three percent of a home’s value each year for upkeep, which on an average home is thousands of dollars annually and more for older ones. None of this appears on the listing.
For households on tighter budgets, this is not an abstraction. In 2021, roughly 822,000 Canadian households, about one in eighteen, spent more than 10 percent of their after-tax income just on home energy, and homes needing major repairs were nearly twice as likely to fall into that group. The home that was affordable to buy is often the same home that is expensive to keep warm.
Some of these costs move with policy. The federal consumer carbon charge that had been adding a few hundred dollars to the average natural gas bill was removed on April 1, 2025. That helped, and it also makes a useful point. The part of a heating bill that a government can change is small. The part set by your attic is not.
How to Estimate What a Home Will Cost to Run
The practical move is to price the home you will live in, not only the home you will buy. Before committing, estimate the operating cost the same way you estimate the mortgage, because the structure tells you most of what you need. The age of the home, the heating system, the state of the insulation, the windows, and how airtight the building is together predict the energy bill far better than the asking price does. An older home with original windows, thin attic insulation, and a decades-old furnace will cost more to run than a tighter, better-insulated home on the same street, even when the two sell for the same amount.
The Institute for Research on Public Policy recently described home energy as the single largest expense for most households over the long term. It deserves at least as much attention as the inspection. This is the number Cobnect was built to surface. An asset-based virtual assessment estimates how a home will perform from its characteristics and structure, so the operating cost stops being a surprise that arrives in the mail and becomes something you can see before you decide.
The Bottom Line
A home’s purchase price is the smallest number in the transaction, and it gets the most attention. The cost of living in the home is larger, it lasts longer, and it is knowable before you buy. Price the home you will live in, not only the one you will buy.
