National law firm Simpson Millar, which has 10 offices across the UK, has opened its first Liverpool base, taking eight workstations in Bruntwood's Oriel Chambers.
In a separate deal at the same building, Lawyerly, which provides a legal services search engine designed for mobile devices, has almost trebled its number of workstations to provide accommodation for a dozen members of staff.
Matt Lee, sales surveyor at Bruntwood, said: "The serviced space at Oriel Chambers continues to be a popular choice among businesses that are targeting early growth and need the ability to flex their arrangements easily.
"Finding flexible space in such an historic building, complete with period features, is a rare combination and attracting a law firm as established as Simpson Millar, while also agreeing larger deals with two existing customers, is testament to that appeal."
Grade 1-listed Oriel Chambers dates from 1864 is one of the finest and most influential buildings of its age, being one of the first office buildings to use an iron framework structure. Its innovative design had a considerable influence on office buildings across the world.
Bruntwood recently refurbished the building, combining modern facilities with ornate period detail.