What custom trim and doors in Louisville covers
Door and window casing, baseboard, stairs, and the transitions where a new floor meets old treads. In an older Louisville house the upstairs profile has often not been sold in eighty years, so it gets milled to match rather than approximated.
That is the single decision that separates a basement reading as original from one reading as a renovation. Running whatever the store stocks is what gives it away, particularly in the Highlands and St. Matthews where the original millwork is heavy and distinctive.