Found a place! Has anyone converted a two family into a 3 family?

[Steve Candor]

It's a 2 family property. Third Family is already built. I would need to separate 2nd floor electric with 3rd floor electric. I was going to run conduit on the outside of the building and run it into the 3rd floor. For heat they just use electric heaters. I may or may not convert to gas. 

Most important - is I need to install a stove (and the hookups) and fridge. As well as a kitchen sink. (bathroom is already up) Whats roughly the cost to do this job in the Northeast (in Mass)?

[Ann Bellamy]

Steve, I don't think anyone can give you a meaningful answer with the information you've provided.

First, the location in MA matters.  There is a huge difference between, say, Boston and Springfield.  And the costs of construction in each.  

Second, you need to find out from the building department whether you will even be allowed to convert to a 3 family.  It may be a moot point.

Your post sounds as if "electric heaters" means freestanding electric space heaters.  Bad idea, and won't be allowed by any building department as a primary source of heat.   So I guess I would first contact the building department and second reach out to local contractors once you have decided on your scope of work.  

I know this isn't the answer you are looking for, but I'm not sure anyone can answer with this amount of information.