Cost of Construction

[Stephen Earley]

Hi NNJ BP Members - 

Can someone help me determine the cost of construction for a major renovation in Northern NJ. Obviously national averages do not work for this area. I realize a lot of factors are at play when arriving at this number, aiming for average cost per sf in NNJ in a nice neighborhood. Neighboring homes are in the $800k - 900k range. 

Specifically looking for price per square foot to do an add a level on a single family cape in a middle/upper class suburb, pretty much from the foundation up, maybe salvage some of the first floor. Higher end finishes, open concept, 4 beds 3 baths colonial style.

Any help here would be appreciated.

Thanks

Stephen