House Sitting in Winter: Pipes, Snow, Driveways, and Mice

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Winter changes what a house sit actually asks of you, not just whether you need a coat. Between a frost-covered sit in Cortona and years running a farm through real Icelandic winters before house sitting began, we've picked up real, specific lessons about dogs in snow, pipes, heating, driveways, and the mice that inevitably show up once the cold sets in.

If you are heading into a winter sit through TrustedHouseSitters, a 25% discount on membership is available here. Some of what follows comes directly from house sitting, our Cortona sit specifically.

Some of it comes from years I spent managing a farm property through genuine Icelandic winters before house sitting was part of our life at all, and the lessons transfer directly.

Cold Weather Signs in Dogs and Cats

The clearest lesson here isn't a number, it's a behaviour. In Iceland, the outdoor dogs I looked after genuinely loved snow, chasing snowballs, eating mouthfuls of it, clearly having a great time. But there was always a visible moment when that changed. Shivering, sometimes fairly heavy, was the first sign. The second, more specific sign was paw-lifting, a dog picking its feet up off the ground one at a time because the cold or the ice underneath had become uncomfortable. Both are a clear signal it's time to head inside, not a judgment call to agonise over.

Disclaimer: This is general guidance based on our own experience and research, not veterinary advice. If you suspect hypothermia or frostbite in a pet, contact a vet promptly, our guide on handling a pet emergency when the owner is unreachable covers the full escalation process. Small, short-haired, very young, senior, or unwell animals are at meaningfully higher risk and should have outdoor time limited more cautiously than the general guidance above.

Every dog is different. Some genuinely thrive in the cold, others tolerate it poorly regardless of coat or breed reputation. The safest approach is watching the actual animal in front of you rather than assuming based on temperature alone.

A note specifically on cats, since the original draft was dog-heavy: most cats have far less tolerance for genuinely cold conditions than people assume, and unlike a dog on a walk, a cat outdoors in the cold is usually unsupervised. If a sit involves a cat with outdoor access during winter, this is exactly the kind of thing worth covering in your pre-sit questions to the homeowner, some cats are kept strictly indoor-only once temperatures drop, and that's worth knowing before the sit starts rather than assuming the cat flap stays open year-round.

In most cases, the homeowner will already know exactly how their own pet handles the cold, and it's worth asking directly rather than guessing from scratch. Some homeowners will have a dog jacket, a coat, or even paw protection like booties already in the house for exactly this reason, and if they haven't mentioned it, a quick message asking whether the pet has any cold-weather gear is a simple thing to check before the first walk. It's a far better starting point than working it out through trial and error on day one.

Pipes: What Actually Happens and What to Do About It

We had one direct experience with this, at a sit where the water simply stopped coming through one morning. Not a burst pipe, not water everywhere, just no water. That's actually the more common version of "frozen pipes" than the dramatic bursting scenario people picture, water sitting inside a pipe freezes, expands, and blocks flow before anything breaks.

Disclaimer: This reflects our own experience and general knowledge, not plumbing expertise. If you suspect a genuine pipe issue, contact the homeowner and a professional rather than attempting repairs yourself.

The practical prevention is straightforward: any exposed pipe, particularly outside or in an unheated space, benefits from proper insulation. Outside taps specifically should be drained and switched off for winter if the home isn't actively using them, standing water in an outdoor tap is exactly what freezes and causes problems. I've also seen plastic drainage pipes crack in genuinely severe cold, they're more brittle than proper insulated plumbing and worth checking if a property has them exposed.

If something does go wrong and you notice water where it shouldn't be, turn off the water supply at the mains if you can locate it, and contact the homeowner immediately. You can't always prevent pipe issues in extreme cold, but a sitter who is actually paying attention and catches a problem early is genuinely one of the more valuable things a homeowner can have during winter, arguably more valuable than any insulation.

Heating: Non-Negotiable, Not Optional

A functioning heating system during a winter sit isn't a comfort question, it's a property-protection one. Without adequate heating, moisture builds up inside a home, and that moisture becomes mould given enough time, which is a genuinely serious problem, arguably worse than almost anything else that can go wrong with a house during winter.

Beyond running the heating properly, whatever the system, radiators, a wood pellet stove, underfloor heating, a few habits matter. Open windows and doors briefly every so often even in cold weather, stagnant indoor air is its own problem and a few minutes of fresh air makes a real difference. If a property uses a pellet or wood stove, checking fuel levels regularly is a simple, easy task that prevents the heating failing overnight without anyone noticing.

Clearing Driveways: Check the Legal Side, Then Get Salt

This was a real, regular task running a farm property in Iceland, a 30 metre driveway that needed clearing after overnight snowfalls that could reach a metre deep, since guests needed to actually reach the property. It's genuinely physical work, and worth confirming as an explicit expectation before a winter sit rather than discovering it's assumed.

One thing worth knowing: clearing snow and ice from a driveway or path is a legal requirement for the property occupant in some countries, tied specifically to liability if someone slips and is injured. This is worth asking the homeowner about directly rather than assuming it's just good practice, in some places it genuinely isn't optional.

Salt is worth having on hand regardless. I was sceptical of it for a long time, but using it properly in Iceland changed my mind entirely, it works remarkably well on stubborn ice in a way shovelling alone doesn't achieve. If salt isn't already provided, it's inexpensive and worth picking up before a winter sit in a snow-prone area.

Rock salt and de-icing chemicals used on paths and roads can irritate paws or, if licked off fur, cause the kind of ingestion issue covered in our guide on what to do if a pet eats something dangerous. Wiping a dog's paws after a walk on salted or gritted surfaces is a simple habit worth adopting, and it pairs naturally with the earlier point about keeping salt on hand for your own driveway.

Finding Rodents: A Genuine Winter Pattern, Not Bad Luck

This one surprised me the first time it happened. At the Iceland farm, being the only property in a large area, summer meant essentially no rodents at all. Winter was the opposite, some days finding as many as eight mice in the house, drawn in by warmth and food the way any animal seeks shelter from genuinely harsh conditions outside. I used live traps and released them a few kilometres away rather than anything more drastic.

On our current sit in Portugal, the resident cat handles this almost entirely on her own, we rarely see a rodent at all. If a cat is part of a winter sit, expect it to actively hunt, and expect the occasional half-eaten result left somewhere visible. That's the cat doing its job, not a problem to solve.

Conclusion

Winter house sitting asks more of you in some specific, practical ways: watching a dog's actual behaviour rather than the temperature, keeping half an eye on pipes and heating, being ready for driveway clearing if the property needs it, and not being surprised when mice start showing up looking for warmth. None of it is complicated once you know what to actually look for, most of it is just paying attention.

Caro and I have completed 20 house sits across 12 countries, driven 19,000km across Europe in our 1998 VW T4, and saved over $26,500 in accommodation costs over three years of house sitting. If you have a winter sit coming up and want advice on a specific property, DM us @housesittersguide, we answer everyone.

Frequently Asked Questions

• How do I know if it's too cold to walk a dog in the snow?

  Watch the dog rather than the thermometer. Shivering and repeatedly lifting paws off the ground are clear signs it's time to head inside. Some dogs tolerate cold well and genuinely enjoy snow, others don't, regardless of breed assumptions, so the animal's actual behaviour is the best guide.

• What should I do if the pipes freeze during a house sit?

  Frozen pipes often just mean water temporarily stops flowing rather than bursting dramatically. Insulate exposed pipes where possible and make sure outside taps are drained for winter. If you notice water where it shouldn't be, turn off the mains supply if you can and contact the homeowner immediately.

• Am I responsible for clearing snow from the driveway during a house sit?

  This should be confirmed directly with the homeowner before the sit, but in some countries clearing snow and ice from a driveway or path is a legal requirement tied to liability if someone is injured. Salt is genuinely effective on stubborn ice and worth having on hand.

• Why do mice suddenly appear in a house during winter?

  Cold weather drives rodents indoors seeking warmth and food, it's a normal seasonal pattern rather than a sign of a dirty or poorly maintained home. A resident cat is one of the most effective natural deterrents, though expect the occasional "gift" if the cat is actively hunting.

• What's the biggest risk of poor heating during a winter house sit?

  Moisture buildup leading to mould, which is a genuinely serious property issue, not just a comfort problem. Running the heating properly and airing out the home briefly on a regular basis both help prevent it.

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