Kirkland, WA Rental Property Rules: Repairs & Habitability (2026)

Article IV of Kirkland's Property Maintenance Code sets the light, ventilation and space standards every habitable rental unit has to meet, and KMC 21.41.401(b) puts the duty squarely on the owner: the owner must provide and maintain light, ventilation and space in compliance, and no one may occupy or let for occupancy a unit that falls short. Under KMC 21.41.402(a), every habitable space needs at least one window facing directly outdoors or to a court, with glazed area equal to at least eight percent of the room's floor area; a room without its own qualifying window can borrow light through an adjoining room only if the opening is at least eight percent of the interior room's floor area and not less than twenty-five square feet.

Ventilation tracks the same structure under KMC 21.41.403(a): every habitable space needs at least one openable window, with openable area equal to at least forty-five percent of the minimum glazed area required for light. Bathrooms and toilet rooms need the same ventilation unless a mechanical system vents to the outdoors without recirculating air. Clothes dryers must exhaust independently to the outdoors under KMC 21.41.403(e), unless the unit is a listed, labeled ductless condensing dryer.

KMC 21.41.404 adds space minimums that bear directly on rental habitability: a habitable room other than a kitchen can't be less than seven feet in any plan dimension, kitchens need a three-foot clear passageway between counters and appliances, and habitable spaces, hallways, bathrooms and habitable basement areas need a clear ceiling height of at least seven feet. Common halls and stairways in residential buildings other than one- and two-family dwellings must stay lit at all times.