We are currently looking into construction loans and that are requesting the the estimated value of the property. This is my first project and I don't know how to calculate this. Can anyone help me figure it out?

There was the original dwelling which was basically just a 12X16 room with a large walk-in fireplace.  

He suggested setting up the house with an Accessory Dwelling Unit (ADU) and applying for a conditional use permit.

I built an ADU (accessory dwelling unit) on the same property I live on. it is rented.

There are a number of other provisions.Unfortunately many smaller rural lots are part of subdivisions that may have CC&R precluding more than one dwelling unit, so there's another challenge to consider.This could open some new opportunities for a number of rural properties in our state.Support seems to have been generally positive.

The green card is an inspection they do to homes, hotels, motels with multiple dwellings (3 units or more) to make sure everything is up to code in case of fire.

We recently received a letter from the NJ Bureau of Housing Inspection about registering the property under the Multiple Dwellings Law (NJSA 55:13:1A-1).It appears this law only pertains to 3+ Unit multi family properties, which begs the question why we received it in the first place.

If I wanted to make that a 6 unit dwelling instead of a 4, does that make a difference in the zoning of area?  

You could evict....current eviction restriction are only for residential Dwelling units. 

However, since the minimum requirement for a single dwelling residents changed to be 5000 sqft, I can put in at least 5 houses if I can subdivide the lot.