Closing for the Winter? How the 30-Day Vacancy Clause Works

Every spring someone calls us with the same story. The building was closed for the winter, the heat was "on low," and nobody went inside between Christmas and the thaw. Then a pipe let go, the water ran for weeks, and the insurer's first question was, "How long was the building empty?"

That question matters because of the vacancy clause, one of the least-read and most consequential paragraphs in a commercial property policy. If you're closing a seasonal business, waiting on a new tenant, or moving out of an older office, here's how vacancy and unoccupancy wording works in Canada, what usually stops being covered, and the steps that keep a quiet building insured.

What the 30-day vacancy clause actually says

Most Canadian commercial property policies exclude or restrict loss once a building has been vacant, and in some wordings merely unoccupied, for more than 30 consecutive days. When COVID closures pushed businesses across the country toward that line in 2020, the Insurance Brokers Association of Canada asked insurers to waive it for the duration of the emergency (Canadian Underwriter, April 2020). That tells you how common, and how sharp, the clause is.

The details vary by insurer and form, but vacancy wording usually takes one of three shapes.

A blanket suspension: coverage for the building stops, or is limited to a few named perils, after the 30-day mark unless the insurer has agreed otherwise in writing.

Peril-specific exclusions: the policy keeps responding to some perils, typically fire, but drops others such as vandalism, glass breakage, water escape, sprinkler leakage, theft and freezing.

Permission with conditions: the insurer grants a vacancy permit or endorsement, often with an extra premium and conditions like heat, regular inspections, alarms or a drained water system.

Some insurers will go further and decline to keep an empty building on the regular policy at all, moving it to a dedicated vacant property policy that is typically more costly (Canadian Underwriter, 2023, updated 2024).

Find the clause in your commercial property wording before the last staff member leaves, while you still have options.

Vacant vs. unoccupied: the definitions that decide your claim

These two words get used interchangeably at the coffee shop. They are not interchangeable in a policy.

Unoccupied generally means the contents, fixtures and equipment are still there and the business intends to come back, but nobody is working in the building. A seasonal restaurant in January is the classic example.

Vacant generally means the building has been emptied, with no business operating in it and nothing much left to operate with. A retail unit between tenants is the classic example.

Policies define these terms differently, and some apply the 30-day restriction to vacancy only, while others apply it to both. Intent matters too. Commenting on pandemic closures, one consultant told Canadian Underwriter that an insurer might treat a building as vacant if the owner has no intention of returning, even with furniture still inside (Canadian Underwriter, April 2020). Our glossary entry on vacancy is the short version. Your wording is the one that counts.

Why insurers get nervous about empty buildings

This isn't the insurance industry being fussy. An empty building is a different risk from the one you described at renewal.

Nobody notices small problems. A dripping valve, a failed sump pump or a tripped breaker on the heating system can run for weeks. Canadian Underwriter's reporting puts it simply: gradual leaks and exposed wiring are far harder to detect when nobody is on site.

Fire and vandalism risk rises. Owners remain responsible for criminal activity, including arson, at vacant properties, per the same article. Aon's Dorothy Aarons put the standard bluntly: a vacant building "must not by any means be left unattended."

Winter does the rest. The Insurance Bureau of Canada (IBC) reported $8.55 billion in insured damage from severe weather in 2024, the costliest year on record (Insurance Business, January 2026). Freeze-ups and ice are a big part of what happens to an unwatched building between December and March.

There's also more empty space around than there used to be. CBRE's Q3 2026 figures put the national office vacancy rate at 16.7%, and downtown Class B/C space at 23.8% versus 13.8% for Class A (Mortgage Professional Canada, October 2026). If you own an older building that's waiting on a tenant, the vacancy clause may matter to you for longer than 30 days.

Frozen pipes: the winter claim the vacancy clause hits hardest

Water is where vacancy wording bites most often. IBC's January 2026 winter guidance (written for homeowners, but the logic carries over) says freezing damage is generally covered when the pipes are in a heated area and reasonable steps were taken to maintain heat. It also warns that most home policies exclude frozen pipe and water damage when the property is vacant, even where the insurer has given permission for the vacancy (Insurance-Canada.ca, February 2026). IBC's advice for a vacant home is to shut off the water supply and drain the lines.

Commercial wordings commonly follow the same pattern: freezing is covered only if heat was maintained or the system was shut off and drained, and water escape may be excluded outright past the vacancy threshold. "The heat was on" is a statement. A dated log of heat checks is evidence. Adjusters prefer evidence. Our winterizing checklist covers the building-side steps in more detail.

Ontario's "material change" condition: why you must tell your insurer

There's a second trap that sits underneath the vacancy clause. In Ontario, fire policies carry statutory conditions set by the Insurance Act, and Statutory Condition 4 says that a change material to the risk, within the insured's control and knowledge, voids the contract unless the insurer is notified in writing. The Ontario Court of Appeal applied that condition in Royal Bank of Canada v. State Farm (2004), finding that keeping a house vacant was a material change and that the failure to notify the insurer defeated the claim.

That case involved a house and its mortgagees, not a storefront, but the principle carries over: a building going from busy to empty is a change your insurer needs to hear about, in writing, before it happens. Other provinces have similar statutory conditions. Telling your insurer may change the premium. Not telling them can change the outcome of a claim.

The other places vacancy shows up: liability, BI and the city

The property policy gets the attention, but a closure ripples outward.

Liability. An empty building still has a sidewalk, a parking lot, and a roof that sheds ice. Your commercial general liability needs to keep responding to slip-and-fall and trespasser claims while you're closed, and your snow contract still matters. On the flip side, a business that has stopped operating may be able to ask for a premium adjustment on the liability side, a point raised in industry coverage of the 2020 closures (Canadian Underwriter, April 2020).

Business interruption. If a burst pipe in February delays your May reopening, business interruption is what pays for the lost season, but only if the underlying property loss is covered. Vacancy problems on the property side can knock out the BI claim too.

Municipal rules. Some Ontario municipalities regulate vacant buildings directly. The City of Oshawa's vacant building and land registration form, for example, asks for proof of at least $2 million per-occurrence liability coverage identifying the property as vacant, with the City named as an additional insured and 15 days' notice of cancellation. Check your own municipality before you board up.

Your lease. Tenants who close for the season may be breaching a continuous-operation or insurance clause. Our guide to the commercial lease insurance clause covers what to look for.

A 9-step checklist before your building goes quiet

Whether it's a patio restaurant, a marina shop, a seasonal tourism business or a unit between tenants, run through this before the lights go off.

1. Find the vacancy and unoccupancy wording in your property policy, along with any definitions, and note the day count.

2. Tell your broker in writing, with the closure date, expected reopening date and what stays inside.

3. Ask for a vacancy permit or endorsement if you'll pass the threshold, and get any conditions in writing.

4. Decide on heat or drain. Either keep the heat at a safe level with a monitored system, or shut off and drain the water lines and fire-safe the sprinkler arrangement with your fire protection contractor. Don't do half of each.

5. Set an inspection schedule that meets or beats the policy's requirement, and keep a dated log with photos.

6. Install cheap monitoring: water leak sensors, low-temperature alerts and a monitored alarm. They cost less than one deductible.

7. Secure the building: working locks, exterior lighting, cleared combustibles and no "obviously empty" signals like piled-up flyers.

8. Keep the outside maintained. Snow and ice control, roof drains and access routes still matter for liability and fire department access.

9. Diary the reopening date and tell your broker when you're back to normal operations, so the endorsement comes off and any premium credit flows back.

How to keep the premium sensible on a vacant or seasonal building

A vacancy endorsement or a dedicated vacant property policy will usually cost more, but you have some control over how much.

Shorten the gap. The fewer days a building sits empty, the easier it is to place. Coordinate tenant move-out and fit-out dates where you can.

Show your loss control. Monitored alarms, temperature and leak sensors, documented inspections and a drained system are all things underwriters price.

Use your deductible strategically. A higher deductible on a building you're watching closely can bring the premium down. Just make sure you could write that cheque in March.

Bundle the rest of the account. Keeping property, liability and auto with one insurer can give you more leverage when you need a vacancy permit. See bundle and save.

Market it properly. Appetite for vacant or seasonal risks varies a lot between insurers. An independent broker can compare several markets, which is exactly why renewal is the time to shop, or sooner if a building is about to go empty.

If you own or manage several properties, our realty insurance page covers how landlords structure this across a portfolio. Seasonal operators in hospitality and lodging face the closure question every single year.

The bottom line

An empty building isn't automatically an uninsured building, but after 30 days it may be a lot less insured than you think. Read the vacancy wording, tell your broker in writing before you close, choose heat or drain and document it, and keep the outside of the building as cared-for as the inside. If a claim does happen, our claims team will help you through it, and that's far easier when the paperwork shows you did everything the policy asked.

Insurabiz compares 17 Canadian insurers, so we can find one comfortable with your seasonal closure or vacant unit rather than forcing it onto a policy that won't respond. Whether you're in Ottawa or anywhere else we serve, get a quote before the building goes quiet.

This article is general information only and is not insurance or legal advice. Coverage depends on your policy wording and the insurer. Speak with a licensed broker about your situation.