There is no officially licensed Harry Potter version of Monopoly as of 2015, so there are no official rules on how to play. However, several other licensed Harry Potter board games exist, such as Clue, Scene It? and Trivial Pursuit.
While there is no official Harry Potter Monopoly game, a user on the arts and crafts platform Etsy created a version without the permission of J.K. Rowling, the author of the series, and Parker Brothers, the creators of Monopoly. The game, known as "Wizard's Monopoly" came in a wooden trunk with all of the locations changed to popular settings and all of the money featuring Harry Potter characters. The game is no longer available as of 2015.