On Mar 12, 12:13 pm, "John61" wrote:
When I bought this 40-yr old 2-storey house (here in Canada) a couple of
years ago, was told the floor area is 1800 sq ft. Lately I measured from
inside wall-to-wall for getting estimate for attic insulation, it's smaller
than that (less than 1750). I think this is the "interior floor area" used
for "house for sale". Is there a standard way for the measurement?

In my area, "finished square feet" is measured on the outside of the
house. That doesn't make sense since inside the walls is not livable
space. It's probably done that way to make the tax assessor's life
easier.