Are you trying to give ownership to the patio? It is an inanimate object. I would reword it to be something like "the look of the patio" instead of "the patio's look". I'm a little unsure as to what you are asking.
I'm sorry Ben. I was unsure because you don't add an apostrophe to make something plural (except in rare circumstances). The correct form would be patios. Here's a link to check it out for yourself. http://www.grammar-monster.com//lessons/lplurs.htm
