Landlord seasonal maintenance: the short version
Same checklist, every property, four times a year:
Spring: gutters, HVAC filter + AC service, detector test
Summer: respond fast on AC issues; quick pest walk-through
Fall: heat check, weatherstripping, gutters again after leaves
Winter: freeze prep (heat on, pipes protected)
On turnover: new filter, test detectors, photo the condition, re-key.
Document dates and vendors: you'll want that paper trail.
One schedule for every unit: Dwelln for landlords keeps it in one place.