For the purposes of scheme classifications for BREEAM, a crèche is considered to be a drop-in facility which provides short-term child minding. These are often associated with other facilities, such as a shopping or sports centre.
A nursery is considered as as a pre-school establishment, providing regular childcare and early years education.
Given their differing functions, these are classified differently for BREEAM, as indicated within the Scope section of relevant BREEAM technical manuals.