Each House is assigned a fixed interior layout, limiting the choices of what the homeowner/decorator desires. It's not uncommon to have sections in homes be walled off. It would be a huge upgrade if we could have the option to change this...

Some Examples:
A Small house layout with a slightly bigger Ground Floor in exchange for removing the Basement ( Cellarage ). A Medium with no Basement, removing the stair section on the left hand upon entering the establishment. You can go wild with a Large home due to its size... And what if its an FC and we want different access points to our FC room door? ( for the love god if this becomes a thing do NOT put this in the Mogstation I will mald!! you son of !@)%(!$ )

Would be Amazing if this was possible to improve decorating options. Unless? this has been suggested already and answered that its not possible (coding issues etc). Square could even feel fancy with this and have extra unique Layouts be an achievement reward of Finishing content.