An older core with a genuine layer of new build
Westboro needs an honest caveat that most of Ottawa does not. The older housing here runs from roughly 1900 to 1960, with a lot of former cottage-style residences still standing north of Scott Street and a high share of detached homes, and that stock is squarely in the range where nailed plank and early plywood subfloors have had time to loosen. But Westboro also went through documented gentrification and condominium densification through the 2000s, and around a quarter of the dwellings in the neighbourhood now date from 2001 or later. So we do not assume. A 1920s house off Richmond Road and a 2015 infill build a block away have completely different floor systems, and a squeak in the newer one is usually a construction detail rather than age.