The Complete Home Maintenance Checklist: Monthly, Seasonal, and Yearly

Most expensive home repairs are preventable. The furnace that dies in January, the water heater that floods the basement, the roof leak that rots the deck framing. Almost every one of them gave warning signs months earlier. This home maintenance checklist covers what to check monthly, seasonally, and yearly so small problems stay small. Print it, stick it on the fridge, and work through it on schedule.

Monthly Tasks (15 Minutes)

Check the HVAC filter. Pull it out and hold it up to the light. If you cannot see through it, replace it. A clogged filter is the number one cause of furnace and AC problems. During heavy heating or cooling season, check monthly without fail.

Test the garbage disposal. Run it with cold water for 30 seconds. If it hums but does not spin, hit the reset button on the bottom of the unit. If it is jammed, use the hex wrench in the bottom socket to free the flywheel.

Look under every sink. Open the cabinet doors and look for moisture, drips, or water stains. Catching a slow supply line leak early is the difference between a $5 washer and a ruined cabinet floor.

Test smoke and CO detectors. Press the test button on each one. If any unit is over 10 years old, replace it. Detectors do not last forever, and an expired one gives you a false sense of security.

Spring Checklist (March to May)

Service the air conditioner. Before cooling season, hose off the outdoor condenser coils, trim back bushes to two feet of clearance, and change the filter. Turn the system on and make sure cold air comes out of every register. Finding out the AC is dead on the first 90-degree day means waiting days for a tech.

Inspect the roof. From the ground with binoculars, or from a ladder if you are comfortable, look for missing shingles, cracked flashing, and lifted edges. Check the attic for daylight coming through the roof boards or water stains on the underside of the decking.

Clean the gutters. Winter fills them with debris. Clogged gutters overflow and dump water against the foundation, which is how basements flood. While you are up there, check that downspouts direct water at least four feet from the house.

Check exterior caulk and paint. Walk around the house and look at the caulk around windows and doors. Cracked or missing caulk lets water into the wall cavity. Scrape out the bad stuff and recaulk. It is a $10 tube and an afternoon.

Test the sump pump. Pour a bucket of water into the sump pit. The pump should kick on and drain the pit quickly. If it does not, you want to know now, not during the first big spring storm.

Summer Checklist (June to August)

Clean the dryer vent. Pull the dryer out and vacuum the vent hose. Then go outside and check the exterior vent cap. Lint buildup is a leading cause of house fires, and a clogged vent makes the dryer run twice as long. This is a 20-minute job that genuinely saves lives.

Inspect the deck. Look for soft or rotted boards, loose railings, and popped nails. Probe suspect boards with a screwdriver. If it sinks in easily, that board is rotted and needs replacing. Check where the deck attaches to the house. That connection is the most critical structural point.

Service the lawn equipment. Change the oil, sharpen or replace the mower blade, and clean the air filter. Small engines last decades with basic maintenance and die young without it.

Check for pests. Walk the foundation and look for mud tubes (termites), new holes (rodents), and nests under eaves (wasps). Early detection makes pest problems cheap. Late detection makes them expensive.

Reverse ceiling fans. Set them to spin counterclockwise in summer to push cool air down. It lets you run the AC a few degrees warmer without noticing.

Fall Checklist (September to November)

Service the furnace. Change the filter, vacuum around the unit, and make sure the exhaust vent outside is clear of leaves and debris. Turn the heat on before you actually need it and confirm warm air comes out of every register. Finding a dead furnace in October beats finding it in January.

Winterize outdoor faucets. Shut off the interior valve to each hose bib, open the outside faucet to drain it, and leave it open for winter. A frozen hose bib bursts inside the wall, and you will not know until spring when water pours into the basement.

Clean the gutters again. Fall leaves are the big one. Do it after most of the leaves are down but before the first freeze.

Seal air leaks. Check weatherstripping on doors and windows. On a windy day, hold a lit incense stick near edges and watch for the smoke blowing sideways. Seal what you find with caulk or new weatherstripping. Heating the outdoors is expensive.

Test the generator. If you have one, start it and run it under load for 15 minutes. Change the oil if it is due. A generator that will not start during a power outage is just an expensive paperweight.

Winter Checklist (December to February)

Protect the pipes. Know where your main water shutoff is before you need it. In extreme cold, let faucets on exterior walls drip slightly to keep water moving. Open cabinet doors under sinks on exterior walls so warm air reaches the pipes.

Check the attic. After a heavy snow, look for ice dams forming at the roof edge. Inside the attic, check for frost on the underside of the roof decking, which means warm moist air is leaking up from the house. Proper attic ventilation and insulation prevent both problems.

Keep the furnace filter fresh. Winter is when the filter clogs fastest. Check it monthly, no exceptions.

Monitor humidity. Winter air gets dry, which cracks woodwork and irritates sinuses. But too much humidity causes condensation on windows and mold. Aim for 30 to 50 percent relative humidity indoors.

Yearly Tasks (Pick a Date and Do Them)

Flush the water heater. Drain a few gallons from the bottom valve to remove sediment. Sediment buildup kills water heaters years early. If your water heater is over 10 years old, start budgeting for a replacement.

Test the water pressure. Screw a $10 pressure gauge onto an outdoor spigot. Normal is 40 to 60 PSI. Over 80 PSI stresses every pipe, valve, and appliance in the house and needs a pressure reducing valve.

Inspect the chimney. If you burn wood, have the chimney swept and inspected yearly. Creosote buildup causes chimney fires. Even gas fireplaces need an annual look for venting issues.

Review the electrical panel. Open the panel door (not the cover) and look for breakers that feel warm, smell burnt, or will not stay reset. Label every breaker if you have not already. Take a photo of the labeled panel and keep it on your phone.

Walk the whole exterior. Once a year, slowly walk around the entire house looking at siding, trim, foundation, grading, and drainage. You are looking for anything that changed: new cracks, peeling paint, soil piled against siding, water pooling near the foundation. Catching these early is the whole game.

Make It Automatic

The checklist only works if you actually do it. Put the seasonal tasks on your calendar as recurring events. Tie the monthly filter check to something you already do, like paying the electric bill. Keep a simple log: date, what you checked, what you found. When you sell the house, that log is proof of maintenance that buyers love to see. A maintained home is worth more, costs less to own, and does not surprise you at 2am. That is the entire point.