We've been researching costs to build an addition to our house here in Honolulu...... we're estimates of $100- $350 per sq foot for an add on of a free standing 1000 sq foot residence over our current lanai... Mahalo! Don"
The Rhapsody St. John
Aloha Don, I came up with a total cost of $93,283 using a room addition contractor (General Contractor). That obviously, comes out to $93.28 per sq foot...continued.
Carl Heldmann, byoh.com