Any Contractor in MA (Lowell) Recommended for a Second FL add?

Hi all,

I'm looking for a contractor to do a second-floor addition on a 60's ranch house. I'm in the Lowell, Massachusetts area. It's my primary residence. I have a construction loan approved already. The original contractor is dragging his feet and I think he is getting cold feet. So I want to see my options out there. Once this project is complete, I may have a 2 family that will need extensive rehab as well. So good price, good job will get you more work. 

Thanks,

Chris & Beck