Winter Home Maintenance Checklist for London, Ontario Homeowners (2026)

The best time to run through a winter home maintenance checklist for your London, Ontario home is before the first hard frost, not after a frozen pipe or a carbon monoxide alarm forces the issue. As a REALTOR® with Century 21, First Canadian who works with buyers and sellers across London and Middlesex County, I get the same calls every November: a furnace that won't kick on, a burst outdoor tap, or a seller scrambling to winterize a vacant listing. A little prep in October saves a lot of stress in January.

This winter home maintenance checklist covers the furnace, pipe, gutter, and safety tasks that matter most for homes in our climate, plus a few City of London specifics — like the overnight winter parking ban and the Ontario carbon monoxide alarm law — that catch even longtime residents off guard. If you're searching for a home in London or Middlesex County before the snow flies, you can browse current listings any time on 519propertyfinder.com.

Key Takeaways

• Ontario law requires a carbon monoxide alarm outside every sleeping area in a home with a fuel-burning appliance, fireplace, or attached garage — non-compliance can mean a $360 ticket, according to the City of London.
• The City of London restricts overnight parking on city streets from November 1 to April 30 to allow for snow clearing.
• Have your furnace inspected by a licensed technician every fall — it's the single highest-impact item on this list.
• Draining and disconnecting outdoor hoses before the first deep freeze prevents the most common winter plumbing claim homeowners file.
• London crews clear city streets within 24 hours of a snowfall ending and sidewalks within 48 hours, per the City's winter maintenance standards.

Book Your Furnace Inspection Before Winter Hits London

A trained, certified technician should inspect every fuel-burning appliance — furnace, gas fireplace, water heater — once a year, both for efficiency and for safety. The City of London's Fire Department is blunt about why this matters: a cracked heat exchanger or blocked vent can push carbon monoxide into a home, and CO is odourless and tasteless, which is why it's often called "the silent killer."

In my experience walking through homes across London and out toward Middlesex County, the furnaces that fail in January are almost always the ones that skipped their fall tune-up. Booking early also beats the rush — HVAC companies get backed up the moment temperatures drop, and a mid-October appointment is far easier to land than one in December. While a technician is on-site, ask them to check your furnace filter, inspect the chimney or vent for blockages, and confirm your thermostat is reading accurately.

Know Ontario's Carbon Monoxide Alarm Law for London Homes

This is the item homeowners most often get wrong, and it's not optional. Ontario law requires a working carbon monoxide alarm installed outside all sleeping areas in any home with a fuel-burning appliance, a fireplace, or an attached garage. The City of London's Fire Department has reminded residents that non-compliance carries real penalties — a $360 ticket for individuals, with fines that can run much higher.

A few habits make compliance easy: test every CO alarm monthly, and change the batteries once a year — many Londoners use the twice-a-year Daylight Saving Time change as the reminder, a habit CTV News London has highlighted during past CO Awareness Weeks. If an alarm ever sounds, the guidance is simple: get everyone outside immediately and call 911. Never run a generator, barbecue, or portable fuel-burning equipment indoors or in an attached garage, even temporarily.

If you're buying a resale home in London or Middlesex County this winter, this is also worth checking during your home inspection — older homes, especially ones with finished basements, sometimes have alarms missing or in the wrong location.

Protect Your Pipes Before the London, Ontario Freeze

Frozen and burst pipes are the most common winter plumbing claim homeowners file, and most of them are preventable in under an hour of work:

• Disconnect and drain all exterior hoses, then shut off the water to exterior hose bibs if your home has an interior shut-off valve.
• Insulate exposed pipes in unheated spaces — crawl spaces, garages, and basement corners are the usual trouble spots, and this matters even more for the older rural and small-town homes common across Middlesex County, where crawl space insulation standards have changed a lot over the decades.
• Know where your main water shut-off valve is before you need it in an emergency, not during one.
• If you're heading south for part of the winter or winterizing a vacant property for sale, have the whole system professionally drained rather than just lowering the thermostat.

Clear Your Gutters Before London's First Snow

Clogged gutters are a quiet contributor to ice dams, which can force meltwater back under shingles and into your attic or walls. Clear leaves and debris from gutters and downspouts while the weather is still workable, and make sure downspouts direct water well away from your foundation — the City of London specifically advises residents to route downspout water toward gardens and grassed areas rather than paved surfaces, where it can refreeze into ice.

While you're up there (or hiring it out — a reasonable call on a steep roof), look for loose or lifted shingles, and clear any branches hanging close enough to the roofline to snap under snow or ice load.

Learn London's Winter Parking and Snow-Clearing Rules

This one surprises a lot of people who move to London from elsewhere: the City restricts overnight parking on city streets from November 1 to April 30 so plows and clearing crews have room to work. Free overnight parking passes are available (up to 15 per vehicle licence plate), but during an active parking ban, vehicles can't be left on city streets at all.

On service standards, the City aims to clear streets and adjacent bike lanes within 24 hours of a snowfall ending, sidewalks within 48 hours, and bus stops within 72 hours after sidewalks are cleared, per the City's winter maintenance information. The City also asks residents to shovel their own walkways and driveways before snow has a chance to pack down into ice, and to skip heavy salt use where possible. If you spot a dangerously slippery stretch of sidewalk or an obstructed park pathway, it's reportable through the City's Service London portal.

Finish With a Few Exterior and Energy Checks

Round out your prep with a short walk around the outside of the house: check weatherstripping around exterior doors and windows for drafts, seal obvious gaps with caulk, and have a chimney swept if you use a wood-burning fireplace. If your furnace or water heater is nearing the end of its life, call your gas utility and ask what efficiency incentives are currently available — program details change often, so it's worth a direct call rather than assuming last year's offer still applies.

Frequently Asked Questions About Winterizing a Home in London, Ontario

Q: How much does a furnace inspection cost in London, Ontario?

Pricing varies by company and furnace type, so I'd rather not quote a number that may be out of date by the time you read this — call two or three licensed local HVAC companies for current quotes. Booking in October, before the seasonal rush, generally gets you a wider choice of appointment times.

Q: Is a carbon monoxide alarm actually required by law in Ontario?

Yes. Ontario law requires a working CO alarm outside every sleeping area in homes with a fuel-burning appliance, a fireplace, or an attached garage, and the City of London has confirmed that non-compliance can result in a ticket.

Q: When does London's overnight winter parking ban start?

The City's overnight parking restriction on city streets runs from November 1 through April 30 each year to allow snow-clearing crews to work.

Q: What's the biggest mistake sellers make winterizing a vacant London home?

Lowering the thermostat instead of having the plumbing professionally drained. A vacant home with water left in the lines is at far higher risk of a frozen, burst pipe than one that's been properly shut down for the season — and a burst pipe is one of the fastest ways to derail a sale.

Q: Should I winterize before or after listing my home for sale this fall?

Before, if you can. A serviced furnace, clear gutters, and a visibly well-maintained home all read as lower-risk to buyers and their home inspectors.

Ready for Winter in London or Middlesex County?

Getting a home ready for an Ontario winter isn't complicated, but it is easy to put off — and the items on this list (the furnace, the CO alarms, the pipes) are exactly the ones that turn into expensive emergencies when they're ignored. Work through this checklist over a weekend in October or early November and you'll head into the cold months with real peace of mind.

If you're weighing a fall move, getting a vacant property winterized before it sells, or just want a second opinion on what a home inspector might flag this time of year, I'm happy to help. I'm Gloria Roman with Century 21, First Canadian, and I work with buyers, sellers, and investors across London, Middlesex County, and Oxford County. Call me at (647) 883-7135 or visit 519propertyfinder.com to schedule a free consultation.