Elizabeth (assisting architect) advised me on the calculation formula (here with correct numbers )
Existing dwelling: 2102sf x $107.18 = $225,292 x 75% = $168,970
Thus, if the remodeled cost is over $168,970, regardless if area is added, fire sprinklers will be required. Fire sprinklers are another added cost.
Ooops, I stand corrected. The real measures differ significantly from the county data. So Elizabeth was right:
Her calcs show:
1. Existing dwelling: 2320sf x $107.18 = $248,657 x 75% = $186,493
2. If the remodeled cost is over $186,493, regardless if area is added, fire sprinklers will be required. Fire sprinklers are another added cost.
