Fantasy evaluation New Jersey flip and hold

[William M.]

http://www.zillow.com/homedetails/5-N-9th-St-Del-Haven-NJ-08251/67881870_zpid/

I've been looking at this property and trying to review the comps with my limited capability mostly zillow and trulia. It looks like a two unit property a front house and a back apartment. Both in need of a reno.

This is a fake evaluation I can't afford anything right now and I'm just trying to relearn my approach after my last house was just short sold In VA beach. I would like to know the evaluation from experts and new people alike.

The questions. 

How do you make sure the back apartment is zoned and permitted.

Whats the estimated rent per unit from what little can be told from the pictured and description. 

And of course could this be a good deal why/why not. 

Thank you,

Will