About seven in ten homes inside the Town of Purcellville are detached houses, and about half went up after 2000. A house from those years often puts the laundry room upstairs by the bedrooms, so the dryer vent has to cross a ceiling or climb through the attic before it reaches an outside wall or the roof. Every turn on that route is a place for lint to settle, and nobody sees it until the dryer starts needing two cycles.
About one home in five in town is a townhouse, and there the dryer vent often ends on the roof. Older houses near the downtown grid run the other way: the laundry tends to be in a basement or a back room, the line out to the wall is short, and the trouble is usually the flexible hose behind the dryer, crushed against the wall or sagging where lint piles up.
On the historic streets, the dryer vent hood is the part people can see. The Town’s Board of Architectural Review looks at projects in the Historic Corridor Overlay along Main, 21st, 23rd and 32nd Streets and Berlin Turnpike, but not single-family homes, and the historic district’s register listing is honorary. So on a house, replacing a broken hood is your call; on a townhouse or a shop building on those streets, check with the Town before a new one goes up. The dryer vent cleaning itself changes nothing outside.
Outside the town, on the county side of 20132, nearly every home is a detached house and close to three in ten date from before 1980. A farmhouse or an older rambler usually has a short run out a side wall, which makes the hood the weak point: with fields and tree lines close by, a flap that no longer shuts is an open door for birds and mice. We look at the hood from outside as part of the dryer vent cleaning, and if the flap or a guard needs replacing, you get that price first.