A spring cleaning checklist built for Pacific Northwest homes - what eight months of damp actually leaves behind, the order to work in, and the steps a generic checklist never mentions.
Most spring cleaning checklists are written for places that had a dry, cold winter. Seattle did not have one. Our wet season runs roughly October into May, and what it leaves behind is not dust - it is moisture damage in slow motion: mildew starting on the coolest walls, window tracks holding standing water, entryway grit ground into finishes, and soft goods that never fully dried out. A spring clean here is less about scrubbing everything and more about finding and reversing the damp before warm weather bakes it in.
This checklist is ordered the way the work actually goes fastest, and it flags the PNW-specific steps that a national checklist will not tell you to do. If you want the everyday room-by-room order instead, that lives in our Seattle house cleaning checklist.
In a dry climate, spring cleaning is a dust problem. Here it is a humidity problem. Through the wet months, indoor air holds more moisture than it can shed, and that moisture condenses wherever a surface is cooler than the room - exterior-facing walls, closet backs, window glass, the corner behind a dresser. Add closed windows for months and you get the classic Seattle spring discovery: a wall that looked fine in February has faint grey speckling in April.
So the order matters. Dry the house out first, then clean it. Cleaning a damp surface just moves the problem around. This is the same logic behind our rainy-season cleaning guide, except that guide is about surviving the wet months and this one is about clearing out after them.
Pick the first genuinely dry, breezy day and do nothing but move air. Open windows on opposite sides of the house to get cross-ventilation, not just one window cracked. Open interior doors, closet doors, and cabinet doors under sinks. Pull furniture a few inches off exterior walls and leave it there for the day.
Run bathroom and kitchen fans the whole time. If you own a dehumidifier, this is the day it earns its keep - run it in the dampest room with the door closed once you have finished airing that room out. Everything else on this list works better on a house that has had one dry day.
Window tracks are the single most-neglected spot in a PNW spring clean, and they are where condensation collects all winter. Vacuum the track dry first with a crevice tool, then work a stiff brush or an old toothbrush into the corners, then wipe. Doing it wet-first just makes mud.
Check the weep holes - the small slots at the bottom of the exterior track that let water drain out. Blocked weep holes are why a track holds standing water, and standing water is why a sill starts to darken. Clear them with a thin wire or a bamboo skewer.
Then do the glass and the sills. Interior glass will often have a faint film from months of condensation cycles; a microfiber and a light vinegar solution handles it. If you want the whole set done properly rather than piecemeal, that is what interior window cleaning covers.
This is the step to do before you clean anything else, because finding it changes your plan. Walk the house with a flashlight held at a low angle to the wall - raking light shows speckling that straight-on light hides. Focus on: north-facing exterior walls, the wall behind a bed or sofa, closet ceilings, the corner of a bathroom furthest from the fan, and the ceiling above a shower.
Early surface mildew on paint usually wipes off and can be cleaned with a standard household cleaner. What matters is what you do next: if it comes back within a few weeks, the problem is airflow and humidity in that spot, not cleaning. Move the furniture off the wall permanently, use the closet door instead of keeping it shut, or run the fan longer. Cleaning a recurring spot over and over without fixing the airflow is the most common wasted effort in a Seattle spring clean.
One honest limit: if you find growth spreading behind drywall, on framing, or across more than a small patch, that is remediation work and not a cleaning job. Say so and get the right trade in.
The kitchen accumulates a different kind of winter residue - cooking grease from months of the windows being shut. Grease film is the reason a kitchen can look clean and still feel tacky.
If the kitchen is the room that has really gotten away from you, a targeted kitchen deep clean is usually a better use of a day than spreading the same hours across the whole house.
Start with the exhaust fan, because it drives everything else. Pull the cover, wash it, and vacuum the dust off the fan housing and blades. A fan choked with lint moves a fraction of the air it was rated for, and that shortfall is exactly why the ceiling above the shower keeps spotting.
Then grout and caulk. Grout haze and darkening respond to a grout brush and a dedicated cleaner with dwell time - spray it, walk away, come back. Caulk is different: if the caulk line at the tub or shower base is blackened through rather than on the surface, cleaning will not fix it. That caulk needs to come out and be replaced. It is a genuinely satisfying spring job and it takes an evening.
Finish with the drains, the showerhead soaked to clear mineral buildup, and the underside of the toilet base where damp collects.
Closets on exterior walls are the quiet problem spots. They stay shut, they stay cool, and they hold clothing that absorbs moisture. Empty the closet floor entirely, vacuum it, and check the back wall with your flashlight before anything goes back.
Spring is also the natural point to rotate seasonal clothing. Wash or air out heavy winter items before storing them - storing a damp wool coat in a sealed bin for six months is how you find a ruined coat in October. Store in breathable containers rather than sealed plastic where you can, and never store anything in a bin directly on a concrete garage or basement floor.
Strip and wash bedding down to the mattress protector, vacuum the mattress, and flip or rotate it. Pull the bed off the wall and clean behind it - that gap is a classic mildew spot.
Upholstery, rugs, and curtains have been absorbing indoor air for months. Vacuum upholstery including under the cushions and along the seams. Most curtains can be machine washed or at minimum tumbled on air to shed dust - check the label first.
Rugs get vacuumed both sides. Flip the rug, vacuum the back, vacuum the floor underneath, then put it back. Dust that has worked through to the underside never comes up from a top-side pass.
Then the low-frequency items: baseboards, door frames, light fixtures and their bulbs, the tops of doors, switch plates, and remote controls. These are the details that make a room read as genuinely clean rather than merely tidy.
Every wet month, grit and water come in on shoes and get ground into whatever is at the door. Take the mats outside, beat them out, and wash them. Clean the floor underneath properly, and check the finish - if it looks dull or scuffed in a traffic path, that is abrasion from grit, and a mat that gets cleaned more often is the fix.
Wipe down the door itself, the frame, and the threshold. Check the weatherstripping while you are there. A door that has been letting damp air in all winter is worth ten minutes of attention now.
None of these are technically cleaning, but they are what keep the house dry, and spring is when you do them:
The mild irony of a Seattle spring clean is that finishing it coincides with tree pollen. Alder and birch come early, and it settles on sills, entry floors, and any surface near a window you have finally started opening.
Do not treat that as a failure of the clean. Plan a light pass through the highest-traffic surfaces a couple of weeks later - sills, entry, and floors - rather than trying to make the deep clean hold. This is also the argument for a recurring clean through spring: the deep work is done, and the maintenance is what protects it.
Spring cleaning fails when it is scoped as a single heroic weekend. Split it across four sessions and it actually gets finished:
Order matters more than speed. The airing-out and the walkthrough come first because they can change what the rest of the plan needs to include.
There is a point where the list above stops being a weekend project. If the house has not had a thorough clean in a year or more, if you are dealing with mildew in several rooms at once, or if you are trying to get it done around a move or a work schedule, the honest answer is that a deep clean covers this ground in one visit and to a standard that is hard to hit with household equipment.
The difference between the two is worth understanding before you book anything - we lay it out in deep cleaning vs standard cleaning. And if you would rather hand the whole spring reset over, tell us what shape the house is in and we will scope it honestly for Seattle and the Eastside.
Free estimate
Tell us what needs cleaning in your area — we’ll reach out right away.