As long as the structure used in the building is novel and creative, you can apply for an invention patent for its structure. I have made many such patents for others.
The architectural scheme is aimed at the combination of various structures. If this combination didn't exist before, you can still apply for an invention patent.
If this combination is the splicing of existing structures and cannot produce new technical effects, it is impossible to apply for a patent.
Therefore, applying for a patent is generally not aimed at the architectural scheme, but at the structure of the building or at a certain building component.