Seasonal Home Maintenance in Ontario: A Month-by-Month Calendar

Seasonal home maintenance in Ontario follows the weather: prepare for spring thaw, keep cool and dry in summer, button up in fall and protect pipes in winter. Spreading small jobs across the calendar costs far less than fixing a flooded basement or frozen pipe. Here is a month-by-month plan you can follow in any house, condo townhome or bungalow.

Spring maintenance: March to May

Spring thaw is when Ontario basements are most at risk. Snowmelt and rain hit frozen ground that can’t absorb water yet.

March

• Test the sump pump by pouring water into the pit. Make sure it starts and drains.
• Check the basement for damp spots, efflorescence or musty smells.
• Clear snow away from the foundation as it melts.

April

• Clean gutters and make sure downspouts carry water well away from the house.
• Walk the roof line from the ground and look for missing or lifted shingles.
• Check that soil slopes away from the foundation. Add soil where it has settled.

May

• Turn on outdoor taps and check for leaks inside the wall.
• Book an air conditioning tune-up before the first heat wave.
• Inspect decks, fences and steps for loose boards or rot.

Not sure what a sump pump should sound or look like? Our guide on what a sump pump does explains the basics.

Summer maintenance: June to August

Dry, warm weather is ideal for exterior work. Paint, stain and caulk all cure better in summer.

• June: Re-caulk windows and doors. Wash windows and check screens.
• July: Stain or seal the deck. Trim trees and shrubs away from the roof and siding.
• August: Inspect the driveway and walkways. Fill cracks before winter freeze-thaw makes them worse.

Change your furnace filter during summer too, because it also serves the air conditioner. Keep a dehumidifier running in the basement on humid days.

Fall maintenance: September to November

Fall is your last chance to prepare before freezing weather. Do these jobs before the first hard frost.

September

• Book a furnace inspection and cleaning.
• Check weatherstripping on doors and replace worn pieces.
• Look over the chimney and fireplace if you have one.

October

• Shut off and drain outdoor taps from the inside valve.
• Store hoses and patio furniture.
• Rake leaves and aerate the lawn.

November

• Clean gutters again once most leaves have fallen.
• Get your snow shovel, salt and snow blower ready.
• Reverse ceiling fans to push warm air down.

Winter maintenance: December to February

Winter work is mostly about watching for problems. Ice dams, frozen pipes and high indoor humidity are the big ones.

• December: Check attic insulation and look for frost on the underside of the roof deck. Frost points to air leaks.
• January: Keep heat on in all rooms, including unused ones. Open sink cabinets on exterior walls during a deep freeze.
• February: Watch for icicles and ice dams along eaves. Clear snow from furnace and dryer vents outside.

For the shovelling side of winter, see our tips on making snow removal simple.

Seasonal maintenance checklist at a glance

Season	Top priorities	Who usually does it
Spring	Sump pump, gutters, grading, roof check	Homeowner, roofer if damage
Summer	Caulking, deck, driveway, A/C service	Homeowner, HVAC technician
Fall	Furnace service, outdoor taps, weatherstripping	HVAC technician, homeowner
Winter	Frozen pipe prevention, vents, ice dams	Homeowner
Every season	Smoke and CO alarms, furnace filter	Homeowner

Costs for professional service vary across the GTA. Get at least three quotes for bigger jobs, and ask for written estimates.

Keep a simple maintenance log

Write down the date of each furnace service, filter change, roof repair and sump pump test. A shared note on your phone or a folder of receipts works fine.

The log helps you spot patterns, like a basement that gets damp every April. It also helps when you sell. Buyers and their home inspectors like to see proof that a home has been cared for.

Signs you’ve fallen behind

• Water stains on ceilings or basement walls.
• Gutters overflowing during a normal rain.
• Rooms that are much colder or warmer than the rest of the house.
• Peeling exterior paint or soft wood around windows.

If you see any of these, deal with the cause first, then catch up on the calendar.

Frequently asked questions

How often should I change my furnace filter?

Check it monthly and replace it when it looks dirty. Homes with pets, renovations or allergies often need more frequent changes. Follow the filter maker’s guidance.

When should I shut off outdoor taps in Ontario?

Shut them off and drain them in October, before the first hard freeze. Leaving water in the line can split the pipe inside your wall.

What is the most important spring maintenance task?

Managing water. Clean gutters, extend downspouts and test your sump pump before the heavy spring melt and rains.

Do I need a professional for seasonal maintenance?

Most tasks are easy for homeowners. Book licensed pros for furnace and A/C service, roof repairs, electrical work and anything involving gas.

Make it a habit, not a scramble

Put these tasks into your phone calendar with reminders. Ten minutes a week beats a costly surprise.

If you own a bungalow, our bungalow maintenance checklist adds style-specific tips. Planning to sell after a busy maintenance season? Start with a free home evaluation.