This may sound like a daft question, however, our solicitor has shared with us the boundary lines for our new build house and we are surprised that there is a small piece of grass area next to our parking spaces which is also ours. What I am wondering, is if this is "our land" does that mean we can do anything we want with it (within reason and any associated planning permission)? For example, could we change this to additional parking spaces for us?
Picture attached (green space we didnt know about is highlighted in blue)

Picture attached (green space we didnt know about is highlighted in blue)
