CMS Cameron McKenna has begun the search for a new office in the Square Mile to replace its Mitre House premises.
The lease on Camerons’ current building runs out in 2015 and the firm is considering a pre-let on a new building in the City.
The firm has hired real estate adviser CB Richard Ellis to help find 300,000sq ft of space. The firm currently occupies 186,000sq ft in Mitre House.
A Camerons spokesman said: “Like every business we’re trying to be forward-looking and are evaluating our space requirements for the future.”