Michigan Cottage Winterization Checklist: How to Close Your Cottage for Winter

Michigan Cottage Winterization Checklist: How to Close Your Cottage for Winter

Closing a Michigan cottage for winter involves more than locking the doors and turning down the thermostat. Freezing temperatures, heavy snowfall, ice, strong winds, and months without regular occupancy can create problems that go unnoticed until spring.

Whether your seasonal getaway is on a lake in northern Michigan, tucked into the woods near Traverse City, or along one of Michigan’s inland waterways, proper preparation can help prevent frozen pipes, water damage, pest infestations, roof problems, and other costly surprises.

This Michigan cottage winterization checklist explains what to inspect, shut off, drain, secure, and document before leaving your property for the season. It also covers important insurance considerations that owners of seasonal and occasionally occupied homes should understand.

When Should You Close Your Michigan Cottage for Winter?

Many Michigan cottage owners begin closing their properties in September or October, particularly in northern Michigan and the Upper Peninsula, where freezing temperatures can arrive earlier than in southern parts of the state.

The best time to winterize depends on the property’s location, construction, plumbing system, and whether you plan to visit during the colder months.

Don’t wait for the first major snowfall. An unexpected overnight freeze can damage exposed plumbing or an inadequately protected water system before the traditional winter season begins.

Schedule professional plumbing, heating, chimney, or other maintenance services early enough to address problems before temperatures fall.

1. Decide Whether to Shut Down the Cottage or Keep It Heated

One of the most important winterization decisions is whether to keep your cottage heated throughout winter or fully winterize it by draining the water system.

Option A: Fully Close the Cottage

If you will not use the cottage until spring, a complete winterization may involve shutting off the water supply, draining plumbing lines, protecting plumbing fixtures, and shutting down appropriate equipment.

This approach can reduce dependence on the heating system, but it requires careful preparation. Water trapped inside pipes, pumps, appliances, or fixtures can still freeze and cause damage.

Option B: Maintain Heat for Winter Visits

If you use your cottage for winter weekends, ice fishing, skiing, or holiday gatherings, you may choose to keep the heating system operating.

However, keeping the thermostat above freezing does not guarantee that every pipe will remain protected. Plumbing inside exterior walls, crawl spaces, cabinets, and unheated utility areas may be exposed to much colder temperatures.

A power outage, heating equipment failure, or an empty fuel tank can also leave the property vulnerable.

For additional maintenance advice, see our Michigan Home Winterization Guide.

2. Shut Off and Protect the Cottage Water Supply

Frozen and burst pipes are among the biggest risks of closing a seasonal cottage. Water remaining in pipes can expand as it freezes, potentially damaging plumbing and allowing water to escape when the system thaws or is turned back on.

For a cottage being completely shut down, the process may include:

• Locating and closing the main water shutoff valve.
• Turning off the water pump when appropriate.
• Draining water supply lines according to the plumbing system’s design.
• Opening appropriate faucets during draining.
• Protecting exterior hose bibs and removing garden hoses.
• Draining or winterizing water-using appliances.
• Protecting plumbing in crawl spaces and other cold areas.
• Checking for leaks before leaving.

Some systems require compressed air or specialized winterization procedures to remove trapped water. A licensed plumbing professional can help you choose the right approach.

Read our Michigan Frozen Pipe Prevention Guide for more information about protecting plumbing during freezing weather.

Don’t Forget Toilets, Drains, and Plumbing Traps

Even after draining the supply lines, water may remain in toilet bowls, toilet tanks, sink traps, shower drains, and other fixtures.

These areas may need additional winterization using products specifically approved for plumbing systems. Follow the manufacturer’s directions and professional guidance.

Never use automotive antifreeze in household plumbing or a septic system. Automotive antifreeze can contain toxic ingredients and is not an appropriate substitute for products designed for plumbing winterization.

3. Winterize Wells, Pumps, and Septic Systems

Many Michigan cottages rely on private wells and septic systems rather than municipal utilities. These systems need extra attention when the property sits unused for several months.

Private Well Systems

Depending on the system, winterization may involve:

• Shutting off the well pump’s electrical supply when appropriate.
• Draining the pressure tank and exposed plumbing.
• Protecting pump houses and above-ground equipment.
• Checking pressure switches and other components.
• Following the well contractor’s recommended shutdown procedure.

Not every well system is designed to be drained in the same way. Improper shutdown or startup can damage equipment, so consult a qualified well contractor if you are unfamiliar with the system.

Septic Systems

Septic systems also need appropriate preparation. Avoid unnecessary vehicle traffic, heavy equipment, or compacted snow over the septic tank and drain field.

Some systems benefit from insulating snow cover, while specialized systems may have electrical equipment that must remain operating.

If your cottage has a septic pump, alarm, or advanced treatment system, consult the installer or service provider before turning off electrical power.

4. Prepare the Heating System and Utilities

Inspect and maintain heating equipment before winter, whether you plan to keep the cottage heated or shut it down.

Before leaving:

• Arrange furnace or boiler maintenance when appropriate.
• Replace dirty furnace filters.
• Inspect visible heating vents and air returns.
• Check fuel levels if the property uses propane or heating oil.
• Confirm thermostat operation.
• Inspect accessible exhaust and intake vents for obstructions.
• Review shutdown procedures for water heaters and other equipment.
• Follow the manufacturer’s instructions for any equipment you turn off.

If you leave the heat operating, consider a temperature-monitoring device that can notify you when the indoor temperature drops unexpectedly. Some devices also monitor power outages or water leaks.

For additional energy-saving and heating information, visit the U.S. Department of Energy’s Energy Saver resource center.

Should You Shut Off Electricity?

Turning off unnecessary electrical circuits may reduce certain risks and energy use, but shutting off all power is not always appropriate.

A cottage may have equipment that needs continuous electricity, including a sump pump, security system, freeze alarm, septic equipment, or heating controls.

Identify which systems must remain powered before shutting off circuits. Consult a qualified electrician if you are unsure.

5. Inspect the Roof, Gutters, and Exterior

Michigan winter weather can place substantial stress on a cottage’s roof and exterior. Heavy snow, freezing rain, ice accumulation, and falling tree limbs can all contribute to property damage.

Complete an exterior inspection before closing:

• Look for missing, loose, or damaged shingles.
• Check accessible flashing around chimneys, vents, and roof penetrations.
• Remove leaves and debris from gutters and downspouts.
• Make sure downspouts direct water away from the foundation.
• Inspect siding, trim, and exterior caulking.
• Check windows and doors for damaged seals.
• Remove dead branches that could fall on the cottage.
• Look for drainage problems near the foundation.

Do not climb onto a steep, wet, or icy roof. Hire an appropriate professional for inspections or repairs you can’t safely do from the ground.

Watch for Ice Dams

Ice dams can develop when melting snow refreezes near the roof edge, potentially allowing water to back up beneath roofing materials.

Attic insulation, ventilation, air sealing, and roof drainage can affect ice dam formation.

Our Michigan Ice Dam Prevention Guide explains common causes and prevention strategies.

6. Protect the Cottage From Moisture and Water Damage

Water damage can begin long before anyone notices a problem. A roof leak, plumbing failure, foundation seepage, or malfunctioning sump pump can cause extensive damage in an unattended cottage.

Before closing, inspect:

• Basements and crawl spaces for dampness.
• Visible plumbing connections for leaks.
• Areas around windows and doors for water intrusion.
• Sump pumps and discharge lines.
• Appliances with water connections.
• Areas beneath sinks and around toilets.

Consider water-leak sensors or monitored alarms if the property will have electricity and an appropriate communication connection throughout winter.

Read more about common causes of damage in our Michigan Home Water Damage Guide.

7. Remove Food and Prevent Pests

An empty cottage can become an attractive winter shelter for mice, squirrels, and other animals seeking warmth and food.

To reduce the risk of an infestation:

• Remove perishable food.
• Empty trash and recycling containers.
• Clean countertops, cupboards and appliances.
• Store any remaining food in appropriate pest-resistant containers.
• Inspect gaps around doors, windows,s and utility penetrations.
• Repair damaged screens.
• Seal accessible entry points using suitable materials.
• Remove nesting materials and clutter from storage areas.

Pay particular attention to spaces around plumbing lines, dryer vents, crawl-space openings, and the foundation.

Use caution with traps or pest-control products in an unattended property, especially where children, pets or wildlife may encounter them. Follow product labels and consider professional assistance for persistent problems.

8. Prepare Refrigerators, Freezers and Appliances

Clean and prepare appliances that will remain unused throughout winter according to the manufacturer’s instructions.

For refrigerators and freezers being turned off:

• Remove food.
• Defrost the appliance.
• Clean and dry interior surfaces.
• Disconnect power when appropriate.
• Leave doors slightly open when recommended to help prevent odors and mildew.

Washing machines, dishwashers, ice makers, and other appliances connected to water lines may require specific winterization procedures.

Do not assume that disconnecting an appliance from electricity removes all water from its internal components.

9. Secure Docks, Boats and Outdoor Equipment

For lakefront cottages, closing the property also means preparing docks, watercraft and outdoor equipment for winter.

Depending on your property, consider:

• Removing seasonal docks or sections designed for winter removal.
• Securing permanent dock components per the manufacturer’s guidance.
• Winterizing boats and personal watercraft.
• Storing life jackets and boating accessories.
• Removing or securing outdoor furniture.
• Draining garden hoses.
• Winterizing irrigation systems.
• Protecting grills and other outdoor equipment.
• Securing kayaks, canoes, and paddleboards.

Floating docks, permanent docks and shoreline equipment may require different winter preparation. Consult the manufacturer or an experienced local contractor before removing or storing equipment for winter.

Also check that stored equipment will not block emergency access to the cottage.

10. Check Smoke Alarms, Carbon Monoxide Alarms and Fire Safety

Keep fire and carbon monoxide safety part of the closing routine, especially if the cottage has a furnace, fireplace, wood stove, fuel-burning appliance, or attached garage.

Before leaving:

• Test smoke alarms and carbon monoxide alarms.
• Replace batteries or alarms as needed, following the manufacturer’s instructions.
• Inspect visible fireplace and wood-stove components.
• Arrange chimney inspection or cleaning when appropriate.
• Remove ashes only after they are completely cool and handle them safely.
• Unplug unnecessary portable heating devices.
• Remove unnecessary combustible clutter.
• Make sure fuel-burning equipment is maintained and properly vented.

Never use a portable generator, grill,  or other outdoor fuel-burning equipment inside a cottage, garage,ge or enclosed space.

For more seasonal safety information, visit our Michigan Fire Safety Guide.

11. Secure Windows, Doors and Valuables

A cottage that sits empty for several months can be vulnerable to theft, vandalism and unauthorized entry.

Take time to:

• Check every exterior door and window lock.
• Secure sheds, garages and storage buildings.
• Remove portable valuables that don’t need to stay at the cottage.
• Store important documents securely elsewhere.
• Consider motion-activated exterior lighting.
• Check security cameras and monitoring systems.
• Arrange for a trusted person to inspect the property.
• Avoid publicly announcing that the cottage will be unattended for months.

Security equipment can be helpful, but it is not a substitute for physically securing the building and arranging periodic inspections.

12. Arrange Winter Property Checks

One of the most useful precautions for an unoccupied cottage is having someone check on the property throughout the winter.

A trusted neighbor, local caretaker, or property management company may be able to inspect the cottage after major storms and at other appropriate intervals.

A property check might include:

• Looking for roof or tree damage.
• Checking for broken windows or signs of entry.
• Confirming that heating equipment is functioning when the cottage remains heated.
• Looking for signs of water leaks.
• Checking for excessive snow accumulation or blocked vents.
• Confirming that alarm systems remain operational.
• Reporting problems promptly.

Keep contact information for local plumbers, heating contractors, electricians,s and other emergency service providers available to the person responsible for checking the cottage.

Ask your insurer whether the policy includes any specific requirements for inspections, occupancy, heat, or water-system maintenance.

13. Review Your Michigan Cottage Insurance Before Winter

A seasonal cottage may have different insurance considerations than a home occupied year-round.

Coverage depends on how the property is insured, how it is used, its occupancy status, the covered causes of loss, and any applicable endorsements or exclusions.

Seasonal and Vacant Property Considerations

An insured seasonal dwelling is not automatically treated the same as an abandoned or vacant building. However, policy definitions and conditions vary.

If the cottage is used only during part of the year, confirm that your insurer knows how the property is occupied.

Ask whether the policy contains any restrictions related to extended periods without occupancy.

Frozen Pipes and Water Damage

Freezing-related water damage may be subject to specific policy conditions, particularly when a building is unoccupied.

Some policies may require reasonable care to maintain heat or to shut off the water supply and drain appropriate systems. Exact wording matters.

Don’t assume a frozen-pipe claim is covered simply because the cottage has property insurance.

Other Questions Worth Asking

• Is the cottage insured for its actual seasonal use?
• Do frozen-pipe losses have coverage, and what conditions apply?
• What coverage is available for damage caused by falling trees or heavy snow? Do detached sheds, docks, and other structures have coverage?
• Does the policy cover theft or vandalism during extended absences?
• Does renting the cottage to guests change the insurance requirements?
• Are there separate deductibles or exclusions for certain types of damage?
• What documentation would be helpful after a loss?

Review our Michigan Home Insurance Claim Prevention Guide for additional ways to prepare before a property loss.

Michigan Cottage Winterization Checklist: Before You Lock the Door

Use this final checklist to review your cottage before leaving for the season. Adapt it to your property’s plumbing, heating, utilities, and other systems.

Common Cottage Winterization Mistakes to Avoid

Even experienced cottage owners can overlook important details during a busy closing weekend.

Common mistakes include:

• Turning down the heat without protecting vulnerable plumbing. Pipes in colder areas may still freeze.
• Shutting off the main water valve without draining the system. Water can remain trapped in pipes and appliances.
• Using the wrong antifreeze. Household plumbing requires appropriate products and procedures.
• Turning off all electricity without checking essential equipment. Sump pumps, alarms, and other systems may require power.
• Leaving food behind. Food and crumbs can attract rodents.
• Ignoring gutters and drainage. Blocked drainage can contribute to water and ice problems.
• Failing to arrange property checks. Small problems may become major losses when no one notices them.
• Assuming insurance covers every winter-related loss. Policy conditions and exclusions can affect coverage.

Frequently Asked Questions About Winterizing a Michigan Cottage

When should I winterize my cottage in Michigan?

Many owners begin winterization in September or October, especially in northern Michigan and the Upper Peninsula. The correct timing depends on local weather, the property’s systems,s and whether it will remain occupied or heated. Complete freeze-sensitive work before freezing temperatures arrive.

Should I turn off the water when closing my cottage?

Shutting off the main water supply is often part of a seasonal cottage winterization plan, but it may not be enough on its own. Water remaining in pipes, fixtures, and appliances can freeze. Follow the correct procedures for your plumbing system and review applicable insurance conditions.

What temperature should I leave my cottage thermostat at in winter?

No single temperature guarantees protection for every cottage. The appropriate setting depends on insulation, pipe locations, heating reliability, and the property’s winterization plan. Ask a qualified heating or plumbing professional for guidance and review any policy requirements concerning heat and freezing losses.

Can I leave my Michigan cottage unheated all winter?

Some seasonal cottages are designed to be fully winterized and left unheated. However, plumbing, appliances, well equipment,t and other systems must be properly prepared. A cottage that isn’t fully winterized may suffer freezing damage when the heat is turned off.

Does cottage insurance cover frozen pipes?

Coverage depends on the specific policy, cause of loss, occupancy status, and any applicable conditions or exclusions. Some policies require you to maintain heat or shut off and drain water systems during extended absences. Review your policy with your insurance representative.

Should someone check my cottage during winter?

Periodic property checks can help identify heating failures, water leaks, storm damage, broken windows, and security problems before they become more serious. Inspection frequency and type should match the property and any insurance policy requirements.

How do I prevent mice from entering my cottage during winter?

Remove food, clean storage areas, inspect exterior gaps, repair damaged screens, and seal appropriate entry points. Pay attention to openings around utility lines, doors, foundations,s and crawl spaces. Professional pest-control assistance may help with recurring problems.

Do I need special insurance for a seasonal Michigan cottage?

Seasonal cottages may require coverage that reflects their occupancy and use. Insurance options vary by insurer, property characteristics, and whether you use the cottage personally or rent it to others. Confirm your insurer understands how the property is used, and ask about any applicable coverage restrictions.

Closing Your Michigan Cottage the Right Way

A Michigan cottage can provide years of summer memories, lake weekends, and family gatherings, but protecting it while you are away requires planning.

Proper winterization starts with protecting the water system and continues with heating equipment, roof maintenance, moisture control, pest prevention, security and regular property checks.

Before leaving for the season, review your insurance coverage and document the property’s condition. Taking these steps in the fall can help reduce the risk of unexpected damage when you return in the spring.