Hey its me again.... H0 Railway model buildings are way to small aint they ?
For their intended look and feel, yes. H0 is about 1/87. Our 28mm-ish "scale" is usually approximated to something like 1/56-1/60 with even larger stuff like 1/48 often used for playability, base compensation, modern scale creep and so on. H0 goes to the wrong direction, looking already small for 25mm stuff and even smaller for 30mm+ with bulky proportions.
However, you can still use some flexible-scale items like fences and trees. Just buy an item which is intended as "large" and it will appear like its small counterpart. Tall trees become medium trees etc., which is quite acceptable. Probably won't work with most buildings, though.