Mr Cadogan wound down his law practice, Tim Cadogan Lawyer, to about 10% of its capacity when he was elected mayor last year.
He planned to be a ``full-time mayor'', but wanted to keep his practice open to maintain his practising certificate and ``stay connected'' to the community.
However, the workload of the mayoralty was such that it was not practical to keep the practice operating even at 10%, and it would close on March 31, seven years after it opened, Mr Cadogan said.
He said there was an ``element of poignancy'' involved, ``as it took me so long to become a lawyer. But it has been overwhelmed by the excitement and opportunities that the mayoralty brings.''
Mr Cadogan had practised as a lawyer for about 12 years, initially working for Macalister Todd Phillips Bodkins, which later became Bodkins and is now known as AWS Legal.
Before being admitted to the bar he worked in media for about 12 years, doing radio announcing, copywriting and hosting.
Mr Cadogan was also previously a Disputes Tribunal referee, but he retired from that role when he was elected mayor.
