Home Maintenance by Season: The Puget Sound Calendar

Puget Sound home maintenance follows the rain. Fall is for heating tune-ups and drainage. Winter is for freeze protection and ventilation. Spring is for moisture inspection and cooling prep. Summer is for projects. This calendar tells you when to do each task so nothing important waits until it fails.

Why organize maintenance by season here?

Western Washington has one long wet season from October through April and one short dry one. Windstorm season runs October through February. Hard freezes are rare but real, like December 2022, and they punish homes that skipped a half hour of prep. Timing matters more here than in most climates: a furnace problem found in September is an appointment, while the same problem found in November is a cold house during the busiest weeks of the year.

The local housing stock raises the stakes further. Many Puget Sound homes were built before 1980 with crawlspaces, minimal insulation and older mechanical systems. Those homes tolerate neglect poorly, and they reward owners who work with the weather instead of against it. The calendar below is built around that reality, and it assumes nothing about your home except that it lives in this climate.

This article is the calendar view. For the full task-by-task list with DIY and pro labels, keep our annual home maintenance checklist as the master reference. The calendar tells you when. The checklist tells you what and how.

What should you do in fall? (September to November)

Fall is the most important season on this calendar. Everything you do now pays off during the six wet months that follow.

• Book a heating tune-up early. September and early October appointments are easy to get. By November, every company in the region is booked with no-heat calls. A seasonal tune-up catches cracked parts, weak igniters and safety issues before you depend on the system daily.
• Get the water off your house. Clean gutters and downspouts, and confirm downspouts discharge away from the foundation. Then test the sump pump with a bucket of water. If your crawlspace floods in heavy rain, read up on sump pump options before the storms arrive, not during them.
• Disconnect hoses and winterize hose bibs. Do this in October. It takes five minutes and prevents the most common freeze damage we see.
• Replace HVAC filters. You are about to run the system hard for six months. Start clean.
• Test smoke and CO detectors. Heating season is when CO risk rises. Fresh batteries, working alarms.

What should you do in winter? (December to February)

Winter is about protection and watching, not projects.

• Protect pipes during cold snaps. When temperatures drop below freezing for more than a day, open cabinet doors under sinks on exterior walls and let a faucet drip overnight. Know where your main shutoff is before you need it.
• Manage moisture and ventilation. Closed-up winter homes trap humidity. Run bathroom fans during and after showers, run the kitchen fan when cooking, and watch windows for heavy condensation. Persistent condensation means the house is not exchanging enough air.
• Prepare for windstorm outages. October through February is outage season. Know how your garage door releases, keep flashlights staged and think through backup power. Our guide to generators versus battery backup for PNW storms compares the options.
• Listen to your heating system. New rattles, short run cycles or a burning smell mean call now, not in spring. Small problems in December become failures in January.

What should you do in spring? (March to May)

Spring is inspection season. Six months of rain just tested every seal and slope on your property. Go find out what happened.

• Inspect for moisture damage. Check the crawlspace or basement for standing water, damp insulation or a musty smell. Look under sinks and around toilets. Check ceilings below bathrooms. Catching water damage in April is a repair. Finding it in October is a project.
• Prep cooling before the first hot week. Since the 2021 heat dome, cooling stopped being optional for many local homes. Clear debris from the outdoor unit, replace filters and run the system once on a mild day. If it struggles, schedule service in May, because air conditioning companies book solid the first week of real heat.
• Test outdoor electrical. GFCI outlets, exterior lighting and any outlet that spent the winter behind a wet cover.
• Flush the water heater. Spring is a good slot for the annual flush if fall is already crowded with tasks.

What should you do in summer? (June to August)

Summer is dry, days are long, and contractors have the most schedule flexibility for planned work. This is project season.

• Do the upgrades you postponed. Panel upgrades, repiping, ductwork, EV charger installs and water heater replacements are all easier to schedule and live through in dry weather.
• Watch cooling performance. Weak airflow or rooms that will not cool down are signals worth a service call, not just a hotter setting on the thermostat.
• Walk the exterior. Check outdoor outlets, fixtures and the service mast while everything is dry and visible.
• Book your fall tune-up in August. You will beat the September rush and start the cycle over in the best position.

How do the calendar and the checklist fit together?

Use the checklist to know every task your home needs and whether it is DIY or pro. Use this calendar to place those tasks in the right months. For heating and cooling specifically, our HVAC maintenance checklist breaks down filters, coils, heat pump defrost checks and duct health at the level of detail a single calendar cannot hold. Three documents, one system: what, when and how deep.

Common questions

What is the single most important seasonal task?

The fall heating tune-up. It protects the system you depend on most, during the season you depend on it, and it is the visit most likely to catch a safety issue like a cracked heat exchanger before you run the furnace daily.

I missed fall. Is it too late to do anything?

No. Book the heating service now anyway, do the freeze-prep items the same week, and pick up the calendar wherever you are in the year. A late start beats another year of nothing.

Does this calendar change for a condo or townhome?

Yes, it shrinks. Skip the gutter, crawlspace and hose bib items if your HOA handles the envelope. Keep everything about heating, cooling, water heaters, detectors and in-unit plumbing. Those are yours.

What to do next

Look at the current month, do this season's DIY items this weekend, and book the professional visit for the season you are in. Eco covers electrical, plumbing, heating and air across the Puget Sound with one number. Book online or call (206) 970-1031, 6 AM to 6 PM every day.