We had 1400 sq ft for 5 people, 3/2. It lacked much storage, but it was functional. Now, we are right at 2000 sq ft; 4/3; 5 people. Still not much storage, but a bit better.
When you remove wasted rooms, like a dinning room, den, ect, you dont need as much sq ft.
A think a large porch makes up...