Bathroom remodeling in San Francisco means a small, often windowless room in a house that never fully dries. Flats and Edwardian houses hide full baths in former closets or at the back of a long hall. The fan, if there is one, may vent into a joist bay. Tile is stuck to plaster that wants to come off in sheets once you start. Moisture has been in the room for decades because the weather outside is cool and people keep the door shut. A new finish over that damp is how the ceiling below gets spotted.
Layout is measured in inches. The door hits the lavatory. The toilet sits close to the tub. Moving a drain means opening a floor in a building where the ceiling below is someone else's plaster or your own ornamented dining room. Stacks may serve more than one floor, so a casual change at a toilet flange can affect the line above and below. Galvanized supply and tired valves seize when touched. A clawfoot or a short tub may be what the joists were built to carry. A heavy new unit needs a look at the structure, not just at the picture you liked.
Waterproofing and air come before tile. The pan has to drain. The fan has to reach the outside, which on a tight lot may mean a careful route, not a dump into the attic. Windowless rooms stay musty unless that fan is real. Keep a tub if the household needs it, because many of these homes have a single full bath and no space to add another. Do not plan a spacious wet room in a footprint that is barely a hallway. Fit the fixtures, then choose surfaces that can live with fog-belt humidity.
Describe the room as it is when you call. Say whether it has a window, where the fan goes, and whether the floor feels soft. Mention plaster, a shared stack, or stains below. The remodel has to dry a small San Francisco bath without pretending the building is a new tract house.
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