My partner had something like this on her land - 110 acres, but there was about 40sqm against the road that wasn't hers, totally surrounded by her land. Council wanted her to buy it (with noone else interested at all of course) AND pay the back rates on it!
So be careful with something like this - check whether rates are owing and how much. Also the additional costs to legally add the little piece into a single larger block isn't zero. If you don't add them together then there's ongoing rates and stuff. Also, the little piece would be costing money which won't be part of the IP since, by itself, it isn't earning rental income so no deductions for rates, etc.