City firm Nicholson Graham & Jones is relocating its offices under one roof to accommodate its expanding staff numbers.
The new Cannon Street office will be ready by June and will house the firm's 220 staff currently in Moorgate and the West End offices together with a new IT system.
The practice has expanded from 21 to 43 partners in the past five years as a result of growth and its merger with West End firm Brecher & Co last October.
Nicholsons managing partner Michael Johns said: "Our fee income has increased by around 50 per cent in the last three years alone and we are expecting similar growth in the immediate future. We are currently bursting at the seams and are keen to get all our people under one roof."