After looking at hundreds of Seattle homes and living in this city for years, here's the basic home maintenance list I'd recommend to any new homeowner, or really as anyone who wants their house to keep running well. This isn't meant to be a giant inspection checklist. It's the small stuff that's easy to forget, but can make a real difference over time.
Seattle houses don’t always have problems in dramatic ways. A lot of it is slow: moisture, clogged gutters, tired caulking, little leaks, bad airflow, blocked vents, sediment in a water heater, or a filter that hasn’t been changed in forever. None of those sounds like a huge deal by itself, but that’s exactly why they’re easy to ignore. Added together, they’re how a house starts feeling damp, inefficient, neglected, or more expensive to own than it needs to be.
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Change the furnace or HVAC filter about four times a year. Write down the filter size, take a photo of it, and set up auto-delivery so you don’t have to remember the exact size every time. Amazon subscriptions, Home Depot delivery, or whatever system you’ll actually use is fine. When you install the new filter, check the arrow and make sure it’s facing the right direction. In Seattle, this matters because a lot of homes are older, not perfectly sealed, and the system may be dealing with long damp winters, pollen, pets, wildfire smoke, and general city dust.
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Clean the washer, dishwasher, sink, and range hood filters or screens at least once a year. These little screens collect debris over time and can make appliances or fixtures work worse than they should. This is a good one to put on a Google Calendar or Apple Calendar reminder because it’s not something you’ll naturally think about until something starts acting weird. A slow-filling washer or a funky dishwasher doesn’t always mean something major is broken. Sometimes the basic cleaning just hasn’t been done.
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Keep the dryer vent clean. Cleaning the lint trap is normal, but the vent path matters too. If clothes are taking longer to dry, the laundry area feels hotter than usual, or the exterior vent flap isn’t moving well, it’s probably time to clean it out. Seattle homes often have laundry tucked into basements, closets, additions, garages, or older utility spaces, so the vent path isn’t always short or obvious. A partially blocked vent can make the dryer work harder for months before anyone notices.
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Drain and flush the hot water tank once a year. Summer or early fall is a good time to do it because you’re not dealing with the coldest part of the year if something looks off or needs attention. The goal is to clear sediment and help the tank keep working well. While you’re there, look for rust, moisture, staining, or dripping. Water heaters are one of those things people ignore until they fail, and then suddenly it’s urgent.
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Watch for small leaks. Every so often, open the cabinets under sinks, check near the washer, look around toilets, and pay attention to slow drains, musty smells, or new staining. This is especially important in Seattle because moisture is already part of the background. A tiny leak under a sink or around a toilet can sit quietly for a long time, and by the time it’s obvious, it may have damaged the cabinet, floor, trim, or wall.
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Keep caulking in decent shape. Tubs, showers, sinks, windows, doors, and exterior gaps are worth watching. If caulking is cracked, missing, or pulling away, water can get where it shouldn’t. This is a small thing that adds up because water problems often start at the boring edges: the tub corner, the window trim, the backsplash line, or the exterior seam nobody looks at until the paint starts failing.
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Do a quick exterior check once a season. Walk around the house and look at gutters, downspouts, siding, trim, roof edges, decks, grading, and branches near the house. In Seattle, water management is a big deal. A disconnected downspout, clogged gutter, or spot where water pools near the foundation can slowly create bigger problems. You don’t need to turn it into a full inspection. You’re just checking whether water is moving away from the house or hanging around where it shouldn’t.
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Do a quick interior check once a season. Look under sinks, around toilets, near the washer, around the water heater, below bathrooms, and in basement or crawlspace areas if you have them. You’re mostly looking for changes: damp smells, staining, leaks, pests, or anything that looks different than before. Older Seattle homes can have basements, crawlspaces, additions, and odd utility areas that don’t get looked at often, so a quick check helps you learn what normal looks like in your specific house.
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Keep a simple maintenance log. It doesn’t need to be fancy. A spreadsheet, a Notes app entry, a Google Doc, or a folder with receipts is enough. Write down when you changed filters, flushed the water heater, cleaned the dryer vent, serviced the furnace, repaired a leak, replaced an appliance, or had work done. A house maintenance log is kind of like a car maintenance log. It helps you remember what happened, it helps the next contractor understand the house, and it shows good ownership when it’s time to sell.
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Use reminders so the house doesn’t depend on your memory. Set calendar reminders for quarterly filters, annual dryer vent cleaning, annual water heater flushing, and seasonal walkarounds. Keep photos of filter sizes, appliance model numbers, paint colors, roof or sewer invoices, and contractor info in one place. The best maintenance system is the one you’ll actually use, not the perfect one you abandon after two months.
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Don’t ignore things that are starting to go wrong. If a drain starts leaking, a toilet starts rocking, a room smells musty, water shows up somewhere new, or an appliance starts acting differently, get on top of it. Not everything is urgent, but houses usually give little warnings before they create bigger bills. A lot of maintenance is just not letting the small warning signs pile up.
That’s really the whole idea. Change the filters, clean the vents and screens, flush the water heater, watch for leaks, keep caulking decent, do a quick seasonal look around, and keep a record of what you’ve done. None of it is glamorous, but it helps the house stay drier, cleaner, more efficient, and less annoying to own.
In Seattle, that matters because our homes deal with long wet seasons, older building stock, basements, crawlspaces, moss, clogged gutters, and plenty of little moisture paths. Keeping up with the basics won’t prevent every repair, but it can keep small issues from quietly turning into expensive ones. It also gives you a better history of the house, which is useful while you own it and helpful when you eventually sell.
If you’re buying or selling in Seattle, I can help you think through what matters most in the house itself—not just the listing photos. Visit my Seattle buying guide or selling roadmap. You can also browse Seattle neighborhoods or learn more about me.