Why Northwest District faces water damage risk
Built for Nob Hill’s mix of century-old homes-turned-apartments and the commercial strip running through it.
The Northwest District (Nob Hill) is known for well-preserved Victorian and early-1900s residential architecture.
Many single-family homes in the area have been subdivided into apartments over the decades.
The NW 21st and 23rd Avenue commercial strips run directly through the residential grid.
Original or minimally-updated Victorian-era supply lines and roofing, combined with single-family homes now carrying apartment-level fixture demand, raise real water-damage risk — and commercial-restaurant plumbing demand along the strips shares the same neighborhood grid.