Haunted House in Katy! Posted on October 28, 2010May 2, 2013 by mickiec Looking for a Haunted house in Katy? Here are two located in Katy Mills Mall. With over 50,000 sq. ft of dark scary mazes! Admission is $15 per person for both haunted houses. Come and join the Screamfest this Friday, Saturday and Sunday night!