Hi Cesar,
If you choose the minifig (lego man) for a scale you'll be looking at an end result of about 1:44 give or take quite a bit (between about 1:35 and 1:60).
For an architectural model at a free scale, I'd pick the detail that is least like LEGO and work out how to do that. That can give you a scale to work from. That's most likely to be a window or a flourish.
Tim
If you choose the minifig (lego man) for a scale you'll be looking at an end result of about 1:44 give or take quite a bit (between about 1:35 and 1:60).
For an architectural model at a free scale, I'd pick the detail that is least like LEGO and work out how to do that. That can give you a scale to work from. That's most likely to be a window or a flourish.
Tim