Ultimate Bunker is a Custom Portable Underground Bunker Designer and Manufacturer. We pride ourselves in building the perfect bunker for you to fit your budget. We are located just south of Salt Lake City, Utah. 801-661-3900 We came up with the idea to build a custom portable bunker by listening to what others had to say about our competitors pricey bunkers. We offer many of the same options and features as the more pricey bunkers out there, but at a more affordable price and we offer the portability, which allows you to install the bunker yourself without the need of a crane. We manufacture mobile survival shelters used to protect you and your family in case of a pandemic outbreak, civil unrest, biological, nuclear fallout or EMP attacks. We have shelters for your backyard or your pri