Does your EmployeeID and PropertyID parameters really need to be varchar(max), I find it hard to believe that an employee would have an ID with 8 000 characters. The same goes for the property ID. Change this to how many characters they are allowed to have (e.g., if an employee can only have an ID of 8 characters then use that, if it's 100 characters use that, and if it indeed is 8 000 characters, well then I suppose varchar(max) is fine)
I'd also advocate to use clearer aliases for your column. Instead of as PId you should alias it as as PropertyID.
This line is a bit unclear to me WHERE TblA.RegionID > 0 . Can a Region have an ID of 0 or less-than 0?
I also think that the LIKE in this line TblA.PropertyID LIKE '%' + @PropertyID + '%' is used for the wrong purpose. It seems like what you really are doing is comparing the PropertyID of TblA.PropertyID to the parameter PropertyID and in my opinion there should be no need of using wildcards here.