House renovation

Hi, never posted before.
We fell in love with Montenegro in 2006 and ended up buying a house with land directly attached (purchased separately) the house built of stone is not habitable and we have done little to it since then. We last visited in 2015 and had a geometar mark out area around house/land, and now we really want to start planning and doing something with it, if we had done this in 2006 it would have been completed by now! We don't know the classification of area and what if any changes we can make to house and if we can build any structure on the land.  I think this is the first step but unsure where to start? Any advice would be much appreciated. Sarah & Barry