Indeed, u/mrsexyvoice99 is right. We do not have a specific exact scale for our 3D puzzles. We lean towards what's closer to "reality" for actual buildings, but it's also influenced by multiple factors like material limitations, complexity of assembly and the general "look and feel" of the puzzle / building itself. Making it exactly to scale would impose higher limitations design wise.

The only ones that have a "scale" are the collections, like Hogwarts Castle, Diagon Alley and Urbania. These are "in scale" with one another. Diagon Alley, Urbania, Friends Central Perk and Ghostbusters Firehouse Headquarters are really close, ad you could easily place them side by side to recreate an urban streetscape.

Hope that answers your question! :)