Although this is not a direct Bachmann quesation I hope to get an answer regarding buildings.
I purchased two buildings for a a N scale setup and they are both a diffferent size.
One is approx 25-30 % larger. Are ther two n scale sizes???
PS I am using them on a Bachmann Yard Boss set.
Buildings in the real world are different sizes. It would help if we knew what buildings they were.
You can often use HO buildings to represent larger factories by addressing a few key things like door size.
25-30% larger seems more like a 1/100 TT or 15mm Wargaming scale
There are four sizes that I know of. 1:160 which is used in the US, Europe, Japan and other countries.
1:152, which is the old Treble-O used in Britain.
1:150 which is another scale Japan uses.
1:148 which is British N scale.
One way to tell what size is to compare the doors and windows with one you know to be 1:160 N scale. If the same size then your good. If way big then, well..... ???