Legendary horror production house Hammer is teaming with an actual haunted house for its latest development project. Hammer has optioned the rights to the story of the San Jose, California-based Winchester Mystery House which is considered the world’s most haunted. The studio is developing and producing a feature with Imagination Design Works and Nine/8 Entertainment. Shooting will take place at the real house whose history dates back to about 1884. Lore has it that Sarah Winchester, the heiress to the Winchester Rifle fortune, was convinced she was haunted by the spirits of those killed by “the gun that won the west.” Following a medium’s advice, Sarah built a massive house to appease the spirits – and never stopped building it. The belief was that if she never ceased construction, she would live forever. Tobin Armbrust of Hammer parent Exclusive Media is overseeing with Shira Rockowitz. Brett Tomberlin and Antonia Lianos will produce for Imagination Design Works along with Andrew Trapani (The Haunting In Connecticut) and Brian Gilbert (Wrong Turn) for Nine/8 Entertainment. IDW is represented by Alexa Pagonas at Michael Black Management. Allison Binder reps Nine/8 Entertainment.