You neglect to mention that homes in Alaska are diliberately small, because of the extreme heating costs.
The newest of homes tout 4 or 5 star energy ratings - now that gas rates have shot up 45% in two years.
We were lucky to buy our home, a 1000 sq ft over a basement - made in 1978 - at a good price. We swapped out the old furnace and saved 42% on gas usage, swapped much of our lighting and limited our electric dryer use and cut our power bills by 30%. Window & insulation upgrades and so on have paid themselves pack in less than 5 years.
Now, if I could just do something about the local property taxes.......
So our home was just under $50/sq ft and we have added about $6/sq ft in energy improvements over the last 15 years. I could not replace our home for less than 300K in the current market. Crazy heh?