The Drug and Alcohol Team building is being renamed in memory of a member of staff.
The building, at Reayrt Noa on the Noble's Hospital site, is being renamed The Martyn Mackie Treatment Centre.
Mr Mackie died suddenly two years ago, and worked for mental health services for 50 years.
Former colleagues and patients can attend the ceremony at 3pm on Friday, March 21 outside DAT's reception.
MHK queries government worker expenses
Steam Packet sailings delayed tonight
PPE Medpro put into liquidation
Part of TT course closed tomorrow
Carl Cox backs cancer charity's TT fundraising auction
Business appeal over thousands in unpaid bills
Pharmacy plans for former IOM Bank
Appeal after wood from van damages car