Shulmans has occupied the first and second floor of the state-of-the-art building since June 2014, and as employee numbers have increased from 140 to 180, more space was needed.
Tim Halstead, Shulmans’ managing partner, said: “One of the great attractions to us of this landmark development was the flexibility to expand.
"Having enjoyed double digit growth over each of the past five years we’ve been able to keep pace with that expansion.
"We’re a successful business, competing strongly in the corporate legal sector alongside the very biggest firms, and we’re attracting the very best recruits.”
Fit-out work has just started and the new space should be occupied within a matter of weeks.