Anonymous wrote:I would say 1500-2000.
We are a family of 5 in a 1450 she fr home and it is ample space. We have four bedrooms, 2 bathrooms, a rec room downstairs, kitchen and living room. The only thing we don't have is a formal dining room but we can seat 8 at the table and I more than that, we do buffet style.
We have a yard, laundry room, tool room, and storage room.
I can see adding another 500 again ft or so but more than that just feels like excess space.

Those must be some tiny rooms. We had a 1700 sqft in CA for family of 4, but it had only two br.
I grew up in a 3 beds 1.34 baths 1,274 sqft, family of six, and I never want to live that way again.
We now have a 3200 sqft with finished basement. We have 4 br but we use the extra room as an office (I wfh). The only room we don't use daily is the formal dining room. I think the size of our house is perfect for us. Almost no wasted space.