Swapping the furnace for a heat pump this fall? The permit, the City loan, and what shows up on the record

The heat has had to be on in Toronto rentals since September 15, the first furnace fails of the season are already happening, and the City is spending the fall pushing homeowners toward heat pumps — there's a HELP webinar on October 20 and a City booth at the Fall Home Show, October 2–4. If you're replacing a furnace, adding a heat pump, or buying a house where someone just did, here's the part the contractor's quote won't tell you.

Yes, it needs a permit

Toronto treats heating and cooling equipment as building work. A furnace replacement, a new air-conditioner or heat pump, or new ductwork that isn't part of a bigger renovation gets a Stand-alone Mechanical (HVAC) permit from Toronto Building. The City's 2026 fee schedule spells it out for houses and townhouses:

• Boiler/furnace replacement — $214.79 flat fee
• A/C unit addition — $214.79 flat fee
• Heating and ventilating only, no ductwork — $214.79
• Full heating, ventilating and air conditioning — $270.64

The application wants a mechanical layout for each floor, equipment type and size, and heat-loss/heat-gain and duct calculations — which is really a way of asking whether the new unit is sized for the house. Gas connections are separately a TSSA matter and must be done by a licensed gas technician; that's provincial, not a City permit.

The tell: a contractor who says "no permit needed for a like-for-like swap" is quoting you a cheaper, faster job. The City's own fee table has a line item for exactly that swap. Ask who is pulling the permit and whether the price includes it.

For a rental, the permit matters for a second reason: it's the record that the landlord actually did the work when a tenant reports the heat isn't holding 21°C. See Toronto's heating rules for what the bylaw requires.

The City will lend you the money — attached to the house

Toronto's Home Energy Loan Program (HELP) funds heat pumps, furnaces, insulation, windows and more, up to $125,000 or 10% of the property's assessed value, whichever is less. The details worth knowing this month:

• Rates are fixed and posted through September 30, 2026: 3.34% over 5 years, 4.01% over 10, 4.46% over 15, and 4.75% over 20. Only projects with a heat pump, solar, geothermal or new windows get the 20-year term. A 2% administrative charge is added.
• Heat pump-only projects skip the EnerGuide assessment. You apply, get a funding offer, have the installer sign an attestation, and the City releases the balance. Eligible costs explicitly include the building permit and any electrical upgrade.
• Repayment goes on the property tax bill, in 11 instalments a year. Miss it and it's treated like unpaid property tax — same penalties, same lien priority.
• The loan stays with the property, not the owner. Sell before it's repaid and the buyer assumes the balance.

That last point is the one buyers should read twice. A HELP balance isn't on the MLS listing. It's on the tax account, and it should surface in the lawyer's tax certificate — ask for it before closing, not after.

What the permit record looks like — and what it doesn't close

Every mechanical permit lands in the City's building permits dataset with a type, a status and dates. Two things to check on any house you're buying or renting:

• Is there a permit at all? A 2024 heat pump on the side of the house and no mechanical permit since 2010 means the work was done without one. That's a negotiating point and, in the worst case, an insurance question.
• Is it closed? Permits don't close themselves. The final inspection has to happen and pass. 160 Fern Ave in Parkdale is a typical small-house record: a permit to construct an opening in the rear wall, issued April 2017, still sits at inspection status nine years later, alongside a 2026 administrative permit tied to the neighbour's build. (Data via PropertyMonitorTO, from the City's Active Building Permits dataset.)

An open permit for a furnace or heat pump is usually just a missed inspection call — but it's the seller's call to make, not yours. How to read a Toronto building permit walks through the fields.

Before the first cold snap

If you're doing the work: get the permit in the quote, keep the TSSA paperwork, and book the final inspection so the record closes. If you're applying for HELP, the posted rates run out September 30 — the next schedule may differ.

If you're buying or renting: search the address on the permits tool and look for a mechanical permit that matches the shiny new unit outside. Then turn on monitoring so the next permit — or order — on the property lands in your inbox before the heating bill does.