How to Winterize a Vacant Rental House in Western North Dakota

An occupied rental has a built-in alarm system: the tenant. When the furnace quits at two in the morning, they call. When a pipe in the crawl space starts to freeze, they notice the faucet slowing down. A vacant rental has none of that. In a western North Dakota winter, a failed igniter or a power outage in an empty house can go unnoticed for days, and by the time anyone walks in, the problem is no longer a service call. It is a flooded basement, a buckled floor and a unit that cannot be leased until spring.

That is why the vacant unit, not the occupied one, is the riskiest property in your portfolio between November and March. This guide covers how to winterize a vacant house properly: the one decision that shapes everything else, the steps for each approach, and how to keep watch on an empty property when you live somewhere else.

If your units are occupied this winter, the preparation is different. Our rental property inspection checklist covers the fall walk-through for occupied homes: furnace service, pipes in cold spaces, outdoor faucets and the rest. This article is only about the house nobody is living in.

Why an empty house fails differently in a Bakken winter

A vacant house does not fail because something unusual happens. It fails because something ordinary happens and nobody is there to respond.

• No one notices a furnace failure. A tenant feels the house getting cold within hours. In an empty house, the first sign is often water coming through a ceiling.
• Power outages are silent. A gas furnace still needs electricity to run its blower and controls. A storm that knocks out power for a day can stop the heat in a house that looks perfectly normal from the street.
• Leaks run unchecked. A pipe that splits in an occupied home gets shut off within minutes. In a vacant one, water can run until somebody walks in.
• Help is far away. In a market this size, every heating contractor and plumber is busy at once during a cold snap. An owner who lives out of state cannot simply drive over to check.

Every step below is about one thing: either removing the water that can freeze, or making sure someone finds out quickly when the heat stops.

The first decision: keep the heat on, or drain it down

There are two ways to winterize a vacant house, and the choice decides your whole checklist.

Heat on means the furnace keeps running, the water stays on, and the house is kept warm enough that nothing freezes. The American Red Cross advises that if you will be away during cold weather, you should leave the heat on and set it no lower than 55°F.

Drain down means the water is shut off at the main, every line, fixture and appliance is drained, and the traps are protected with non-toxic antifreeze. With no water in the system, a heating failure no longer floods the house.

For most rental owners, the answer depends on how long the unit will sit and whether you are actively trying to lease it.

Keep the heat on if the unit is between tenants and you expect to fill it within a few weeks. You need the water running for cleaning, repairs and showings, and a drained house does not show well. The trade-off is that heat on only works if someone is checking.

Drain down if the house will sit empty for months: an estate property, a unit waiting on a renovation, or a rental you have decided to sell in spring. It is also the safer choice if you cannot arrange reliable local checks.

How to winterize a vacant house with the heat on

Heat on is the less involved approach, but it depends entirely on the furnace and the power staying up. These steps reduce the chance of a failure and shorten the time before someone notices one.

1. Have the furnace serviced before the unit goes vacant. A furnace that has not been checked since last winter is the most likely single point of failure. Put a fresh filter in and leave spares on site.
2. Set the thermostat and leave it. Keep the temperature steady day and night, no lower than the 55°F the Red Cross recommends. Do not use a setback schedule in an empty house.
3. Open cabinet doors under sinks on exterior walls. This lets warm room air reach pipes in the coldest parts of the house.
4. Shut off water to anything that does not need it. Close the supply valves to the washing machine and any outdoor faucets, and drain the outdoor lines.
5. Shut off the main water valve if no one needs water between checks. You can keep the heat on and still shut off the water. If the furnace fails, the damage is limited to what is already in the pipes, not an open supply feeding a split line.
6. Keep utilities active. Gas, electric, and the internet connection if you are using any remote monitoring. A smart thermostat cannot send an alert over a cancelled internet plan.
7. Leave a contact card by the thermostat. If a contractor, utility worker or neighbor finds a problem, they need to know who to call.

How to winterize a vacant house with a full drain down

A full drain down is more work and is best done by a plumber or a winterization service, particularly the first time. Done properly, it removes almost all of the water that can freeze.

1. Shut off the main water supply. Find the main shutoff valve, close it, and confirm it is holding by opening a faucet until the flow stops. If the valve is old or will not close fully, have it replaced before you rely on it.
2. Turn off the water heater, then drain it. Shut off the gas or power to the water heater first, following the manufacturer's instructions, then drain the tank. A tank heated with no water in it can be damaged.
3. Open every faucet, hot and cold. Start at the highest fixture in the house and work down to the lowest, so air can enter and water can drain out.
4. Blow out the lines. Draining by gravity leaves water in low spots and long runs. Many professionals use compressed air to push the remaining water out.
5. Flush and drain the toilets. Shut off the toilet supply, flush, and remove what is left in the tank and bowl.
6. Put non-toxic antifreeze in every drain trap. Use plumbing or RV antifreeze labelled as non-toxic, never automotive antifreeze. Each sink, tub, shower, floor drain and toilet bowl needs some, because the trap holds water by design.
7. Drain the appliances. Dishwasher, washing machine, ice maker and any water softener or filtration system all hold water. Follow each manufacturer's instructions.
8. Label the house as winterized. Tape a notice to the main valve and the water heater saying the house is winterized and the water must not be turned on without a plumber. A contractor or showing agent who turns the water back on can undo the whole job.

Decide what happens to the heat as well. Many owners keep a low heat setting even after a drain down, which protects finishes, drywall and anything else that does not handle deep cold well. Ask your plumber what they recommend for the specific house.

When the house is ready to lease again, restore the water in the reverse order and walk every room with the supply open, looking for leaks before you leave.

Everything that applies either way

Whichever approach you choose, the house still needs to look occupied, stay accessible and be easy to inspect.

• Arrange snow removal. An unplowed driveway and an untouched walk advertise an empty house. Snow also needs to be cleared for anyone doing checks, and for showings.
• Stop or forward the mail. A pile of mail and flyers on the step is the second most obvious sign of a vacancy.
• Leave smoke and carbon monoxide alarms working. Replace batteries before the unit goes vacant rather than leaving it for the next tenant.
• Put exterior lights on timers. A dark house every night is easy to spot.
• Photograph everything at the start of the vacancy. Date-stamped photos of every room, the furnace, the water heater and the main valve give you a record if something happens and a baseline for each check.

How to keep watch on a vacant rental from out of state

Many owners in the Bakken do not live here. If that is you, winterizing the house is only half the job. The other half is knowing quickly when something goes wrong.

Remote monitoring is the early warning. A smart thermostat that sends an alert when the indoor temperature drops, and a few inexpensive water leak sensors near the water heater, under sinks and by the main valve, will tell you something is wrong within hours rather than weeks. They are worth having, but they depend on power and internet. If the power goes out, the alert may never arrive, which is exactly when you need it.

Physical checks are not optional. Monitoring tells you a problem exists. Someone still has to walk in. For a heat-on house, plan a regular interior check, more often during a cold snap. For a drained house, checks can be less frequent but should still happen, especially after a storm. Each visit should cover the same things: the thermostat reading, the furnace running, the floors and ceilings under every bathroom and the kitchen, the basement, and the exterior after any heavy snow.

Write the plan down. Who checks, how often, what they look at, who they call, and who has authority to approve a repair. An owner three states away who has to be reached before a plumber can be sent loses hours that a vacant house does not have.

Who can actually get there in a January cold snap

This is the question that matters most, and the one most winterization guides skip. A checklist assumes help is available. In western North Dakota, during the worst week of the winter, that is not a safe assumption.

When temperatures drop hard, heating contractors and plumbers in Williston, Watford City and the surrounding towns are all being called at the same time, mostly by occupied homes with tenants inside. A vacant house rarely goes to the top of that list unless someone with an established relationship is making the call.

Before the vacancy starts, have answers to these:

• Who has a key and the alarm code, and lives close enough to reach the house the same day?
• Which heating contractor and which plumber will take a call for this property, and have they worked on it before?
• What is the approved spending limit for an emergency repair, so the person on site does not have to wait for you?
• If the road is closed or the person checking is snowed in, who is the backup?

If you cannot answer all four, the house is at more risk than any checklist can fix.

Check your insurance policy's vacancy terms

Many property insurance policies treat a vacant or unoccupied house differently from an occupied one, and the terms vary from policy to policy. This is something to confirm with your insurer, not something to assume. Before the unit goes vacant, ask:

• Does the policy have a vacancy or unoccupancy clause, and after how many days does it apply?
• Does coverage for freeze damage or water damage change while the house is vacant?
• Are there conditions about keeping heat on, shutting off water or having the house checked?
• Do they need to be told the house is vacant, and is a separate vacant property policy recommended?

Get the answers in writing and keep them with the property file.

What a winter vacancy costs you

A vacant month is expensive even when nothing breaks: no rent coming in, while the mortgage, taxes, insurance, utilities and snow removal carry on. We worked through the numbers in our article on how long it takes to rent a house in western North Dakota, including why a modest price cut usually beats an extra month empty.

Winter adds two things to that. Vacancies that start in late fall lease into the slowest part of the year, so they tend to run longer. And a freeze event in an empty house can take a unit off the market completely while repairs are done. Winterizing properly is not just damage prevention. It keeps the unit ready to lease the moment a tenant is found.

Questions to ask a property manager about vacant units in winter

If a manager is looking after your vacant property, these questions tell you how seriously they take the winter risk:

• Do you winterize vacant units with the heat on, a full drain down, or does it depend? Who decides?
• How often does someone walk through a vacant unit in winter, and what do they check?
• Do you use remote temperature or leak monitoring, and who receives the alerts?
• Which heating and plumbing contractors do you use, and how do you get a vacant house seen during a cold snap?
• What can you approve without reaching me, and up to what amount?
• What do you send me after each check?

A manager with good answers has done this before. One without them is planning to find out the first time a furnace quits.

Talk to someone who handles winter in western North Dakota every year

Bakken Property Management looks after rental homes across western North Dakota, with local contractor relationships built for the weeks when everyone needs a furnace fixed at once. If you own a rental in Williston or the surrounding area and it will sit empty this winter, get in touch and we will talk through how to protect it.