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.
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