This project adds twenty-two graduate rooms and two Fellow's sets to an existing college sire in central Cambridge. The insertion re-structures the planning of the site to make sense of the earlier development, which was both unresponsive to its garden setting and the potential of the site. The restricted nature of the backland lot has necessitated a carefully considered response that maintains the privacy and amenity of the surrounding properties and re-focuses all of the accommodation, both new and existing, around a new shared and enclosed garden. The project incorporates rainwater harvesting and solar collectors, and the superstructure of the building is an innovative and highly sustainable solid-wood timber system.