Need scale help for large project

Not sure why his pads are on his ankles, that's where they were sculpted on by McFarlane Toys.

Thanks for your insight Capnmac, at least there are two of you that are helpfull here!

Of course the trouble with all this is that doors and windows come in all sizes (even bad ones).

Now, "modern" (on the US side of the pond) doors are 6'-8" or 7'-0" or 8'-0" tall, and the windows line up with the tops of the doors.  Now, soem of those doors can have transom windows over them (so a 7-0 door might have a 1-0 tall "light" above it).  Doors come in increments of 2" wide (mostly) from 2-0 to 3-0 wide.  Exterior doors used to be very commonly 32" (2-8) wide until fairly recently; the 3-0 door is a much better thing to get appliances (or troops in kevlar) through.

So, your door example is a tad snug, or it's in an older part of an older town--up to the observer to decide.

The thickness of the wall is what I noticed, and it looks pretty good.  A modern brick-veneered 2x4 wall is 9.5" thick; a 2x5 wall jumps out to 11.5" (draw enough floor plans for long enough, and the numbers just roll out of a person <sigh>).

A exterior door is typically 6'8" tall and 3' wide.  If your figures are 6" tall, then we might conclude the scale is 1/12.  If you want doors to be right, try making them 6.67" tall and 3" wide.

In the pictures, the window looks okay, but the door is definitely too small.

Just out of curiosity, why is the soldier in the doorway wearing his kneepad over his ankle?

I love your idea though.  Large dioramas can be really really really awesome!  Keep checking out dollhouse parts for common household items, like dishes, wall hangings, etc.