Home Energy Checklist for Canadian Buyers and Sellers

A home inspection will tell you whether the roof leaks. It won’t tell you what the house costs to heat.
That gap matters more than most buyers and sellers realize. Energy is one of the largest ongoing costs of owning a home, and it is almost the only major cost nobody checks before money changes hands. The average Canadian household spends roughly $2,200 a year on energy bills , and the difference between an efficient house and a leaky one can be thousands of dollars every year for as long as you own it. Space heating alone accounts for about 64% of the energy used in a typical Canadian home, with water heating adding another 17%. Most of that is decided by the building itself, not by the thermostat.
This checklist is built to close that gap. The first half is for buyers: twelve questions to ask before you write an offer. The second half is for sellers: eight things to sort out before you list. None of it requires you to be an engineer. It requires you to ask the right questions and know what the answers mean.

Part One: 12 Questions to Ask Before You Make an Offer

You are about to make the largest purchase of your life based on a two-hour walkthrough and a home inspection that, by design, does not model energy performance. These twelve questions give you the energy picture before you commit.

1. How is this home heated, and how old is the system?

Fuel type sets the floor for both cost and emissions. A home on natural gas, electric baseboards, heating oil, propane, or a heat pump will each run very differently, and each points to a different upgrade path down the road. Age matters just as much. A furnace or boiler near the end of its life is a capital cost you may inherit within a few years, so factor a possible replacement into your offer rather than discovering it in February.

2. Does the home have an EnerGuide rating, and what is it?

An EnerGuide rating is the official measure of a home’s modelled energy performance, produced by a Registered Energy Advisor and expressed in gigajoules per year (GJ/year). Lower is better, and a rating of zero means the home produces as much energy as it consumes. If you have heard of an old score “out of 100,” forget it. That scale was retired at the end of 2018. Ask the seller or agent whether a label exists. If the home was evaluated in the past, the label is often posted on or near the electrical panel. Most homes won’t have one, which is exactly why the rest of this list matters.

3. What is the insulation situation, especially the attic and basement?

Insulation is rated by R-value, a measure of resistance to heat flow, where higher is better. The attic is usually the cheapest place to add real comfort and savings, so an underinsulated attic is an opportunity rather than a dealbreaker. The basement and rim joist, the wood band where the floor framing meets the foundation, are the spots most often left bare and the ones that make a house feel cold from the feet up. Ask what is up there and what is down there. “I’m not sure” is a useful answer too, because it tells you to budget for finding out.

4. How airtight is the home?

Air leakage is one of the largest and most invisible drivers of heating cost. Every gap around windows, doors, pot lights, and the attic hatch lets warm air out and cold air in. Professionals measure this with a blower door test, which depressurizes the house to reveal leaks, and report it as ACH50, the number of times the home’s air leaks out per hour under test pressure. You probably won’t have that number on a resale home, so use your senses on the walkthrough. Feel for drafts at outlets and baseboards on an exterior wall, and ask how old the weatherstripping and caulking are.

5. Can you see the last 12 months of utility bills?

Ask for a full year of gas and hydro bills, not a summer snapshot. The winter peak tells you what the envelope and heating system actually demand when it is cold, and a home with a brutal January swing is telling you something the listing photos won’t. Bills reflect how the previous owners lived, so treat them as a directional signal rather than a guarantee of what you will pay. The pattern across the seasons is what you are reading.

6. How old are the windows and doors, and are they original?

Windows are one of the most expensive line items a homeowner ever faces, so their age changes the math of an offer. Single-pane or first-generation double-pane units from decades ago lose far more heat than modern double or triple glazing, and they are usually the source of those cold-glass drafts in winter. Original windows on an older home aren’t a reason to walk away. They are a number you want in your head before you negotiate.

7. What is the water heating setup?

Water heating is the second-largest energy use in most homes, so the tank in the basement deserves a look. Note whether it is a conventional tank or a tankless unit, what fuel it uses, and roughly how old it is. A water heater past its expected life is both an energy cost and a flooding risk, and like the furnace, it is the kind of thing that fails at the least convenient moment.

8. Is there cooling, and is there any heat pump capability?

Air conditioning load matters more every year as summers get hotter, and the type of cooling tells you about future-readiness. A heat pump is worth flagging specifically, because it both heats and cools efficiently and is the direction most rebate programs now push. A home that already has one has solved a problem you would otherwise be paying to solve. A home with an aging central AC and no heat pump is fine, as long as you know it.

9. How does the home handle moisture and ventilation?

Energy, comfort, and air quality are the same system. A tightly sealed home needs deliberate ventilation, often through a heat recovery ventilator (HRV) or energy recovery ventilator (ERV), which brings in fresh air while keeping much of the heat. Look for signs of moisture in the basement and around windows, and ask whether the home has mechanical ventilation. Damp, stuffy, or condensation-prone homes point to envelope and ventilation issues that are worth understanding before you own them.

10. What upgrades has the seller done, and what is still on the table?

Ask directly what energy work has been completed and whether any rebates were claimed. Which programs apply depends entirely on where you live. In Ontario, for instance, the active program in 2026 is the Home Renovation Savings Program (HRSP), delivered by Enbridge Gas and Save on Energy with provincial support, covering insulation, heat pumps, windows and doors, air sealing, and more. Every province and territory runs its own mix, often alongside municipal and utility rebates, and NRCan keeps a directory of incentives by province and territory that pulls them together in one place. Knowing what the seller already did, and what eligible work remains, tells you both the home’s current state and the upgrades you could pursue after closing. These programs open and close with little warning, so always check what is currently available in your own province before you count on anything.

11. What will this home actually cost to run, and to upgrade?

Step back from the single questions and add them up. The real number you are buying is total cost of ownership: the mortgage plus the predictable energy bill plus the upgrades the house will eventually need. A cheaper house that costs more to heat and needs a furnace, windows, and insulation can be the more expensive home over five years. Model it before you offer, not after you move in.

12. Has anyone actually assessed this home’s energy performance, or are you guessing?

Here is the trap. A standard home inspection assesses condition and safety, not modelled energy performance, and an on-site EnerGuide evaluation by a Registered Energy Advisor carries a real cost and requires access to a home you do not yet own. One Ontario service organization prices the initial evaluation at $520 plus HST, with the follow-up at $330 plus HST. So for the house you are about to bid on, you are almost always guessing. You don’t have to. A virtual energy assessment estimates a home’s performance from its address and characteristics, without a site visit, so you can walk into the offer with a number instead of a hunch.

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Get a virtual read before you write the offer.

You can’t book an on-site energy audit on a house you don’t own yet, but you can estimate where it stands today.

Try Cobnect virtual assessment on the address you’re considering

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Part Two: 8 Things to Know Before You List

Selling is the mirror image. The energy story you can’t see as a buyer is the one you control as a seller, and a little preparation turns an invisible weakness into a visible strength.

1. Energy disclosure isn’t required yet in Canada, but buyers are already asking

There is no national rule requiring you to disclose a home’s energy performance when you sell. Ontario committed to mandatory time-of-sale labelling years ago, but that program was cancelled, and the current federal direction is voluntary. That is the regulatory picture today. The market picture is moving faster than the rules. In a recent national survey, 61% of buyers said energy-efficient features were an important factor in their decision. Voluntary today does not mean ignored by buyers.

2. Your energy performance is a selling point you can quantify

If your home already has an EnerGuide label, treat it as an asset and put the rating in front of buyers, especially if it is strong. If it doesn’t, you are in the same position as the buyers in Part One: guessing. A virtual energy assessment gives you an estimated read on where your home stands before you decide whether a paid on-site audit is worth it. Knowing the number first means you never pay for an audit that tells you what you could have learned for far less.

3. Know which pre-list upgrades actually pay back

Not every improvement returns its cost at sale. The reliable wins tend to be the inexpensive ones that buyers can feel on a walkthrough: air sealing and draft-proofing, attic insulation top-ups, and a smart thermostat. The expensive envelope and mechanical projects, like full window replacement, rarely return their full cost in the sale price, so do them for your own comfort while you live there, not as a last-minute resale play. Spend where perceived value is highest per dollar.

4. If you do upgrade, do it in the right order or you forfeit the rebate

This is where sellers lose money. Under Ontario’s HRSP, the path that unlocks the envelope rebates requires an initial home energy assessment before any work begins, and you then have to complete at least two qualifying upgrades to claim. Start the work first and you have disqualified yourself from that stream. The program also rebates $600 toward the cost of the initial and follow-up assessments once you complete it successfully, and bundling a third qualifying upgrade adds another $500. Insulation rebates on this path reach up to $7,700, while heat pumps, solar, and smart thermostats sit on the separate stream that needs no assessment at all. If you plan to claim, book the assessment before a single contractor starts, and confirm current rules and amounts on the official program page, because they change.

5. Document everything you’ve done

Receipts, EnerGuide labels, rebate records, and dates of major equipment installs are proof, and proof transfers trust. A buyer who can see that the furnace was replaced in 2023 and the attic was topped up last year is a buyer who worries less and offers more confidently. Assemble the paper trail before you list, not after an inspection raises questions you scramble to answer.

6. Have your heating answers ready before the first showing

A savvy buyer’s first energy question is almost always about the heating system: what fuel, what type, how old. Vague answers read as red flags even when nothing is wrong. Know your system’s age and fuel, keep the service records handy, and be ready to speak plainly about it. Confidence here calms the rest of the conversation.

7. Frame efficiency in the listing, not just the open house

If your home has genuine energy strengths, a newer high-efficiency furnace, a heat pump, good insulation, newer windows, or a strong EnerGuide rating, say so in the listing copy where buyers filter and compare. With most buyers now treating efficiency as a real factor, the features that lower bills are features that move homes. Make the invisible visible.

8. Get a realistic number before you spend a dollar

The thread running through all eight points is the same. Before you pay for an on-site audit, before you start rebate work, before you write a single line of listing copy, get an estimate of where your home actually stands. A virtual energy assessment is the low-cost way to decide whether the more expensive steps are worth taking, so you spend deliberately instead of guessing twice.

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Know your number before you list.

See an estimated, audit-aligned read on your home’s energy performance, then decide whether a full on-site audit is worth it.

Run your home through Cobnect virtual home energy assessment

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The Bottom Line

Every home transaction already prices the kitchen, the neighbourhood, and the school district. The one thing that quietly costs the most over the years you own a home, its energy performance, usually goes unpriced because nobody measures it at the moment of decision. Buyers guess. Sellers hope. The checklist above exists so you can do neither.
The deeper shift is that energy performance is moving from invisible to visible. Federal work on a national approach to home labelling, built with input from provincial governments and the virtual assessment industry, points clearly toward a future where a home’s energy story sits on the listing next to its square footage. The buyers and sellers who start asking these questions now are simply early to a market that is already turning.
Cobnect Lens gives you that read today. It produces an estimated, audit-aligned view of a home’s energy performance without a site visit. It is not a substitute for an official on-site EnerGuide evaluation by a Registered Energy Advisor, and it does not issue an EnerGuide rating. It is the fast, low-cost way to walk into an offer, or a listing, with a number instead of a guess.