The Cambridge University Library is 600 years old, one of leading libraries of the world, and home to over 8 million books, journals and other items. As one of five “Legal Deposit Libraries‟ in the UK, it has a requirement to participate in ensuring a copy of every book published in the UK is stored. All of this means that the library has an ever growing storage problem. This project provides their first purpose built storage facility for low-use, but unique, printed material. The facility is to provide sufficient capacity for the projected storage needs up to 2030 and the site allows for a further 25% expansion.