Squire Patton Boggs has agreed to become the first occupier at 6 Wellington Place, which is being developed by MEPC in Leeds.
Last month, The Yorkshire Post revealed that MEPC was close to signing a deal with Squire Patton Boggs.
Squire Patton Boggs, which employs around 270 people in Leeds, will move into around 32,000 sq ft of office space over two floors when the building is completed at the end of 2015.
The firm will move from its current Park Lane offices in the city centre.
Number 6 Wellington Place is the first speculative grade A office development that has been built in Leeds for more than six years.
The five-storey building will offer 104,000 sq ft of grade A office and retail space.
Its construction follows the recent completion of the 35,000 sq ft 10 Wellington Place.
James Dipple, the chief executive of MEPC, said: “This agreement is fantastic news.
“We are absolutely delighted to have secured such a prestigious name as Squire Patton Boggs as the first occupier at 6 Wellington Place and look forward to welcoming them to the scheme.
“We continue to have positive discussions with a number of interested parties and expect to make further announcements in the near future.”
John Alderton, managing partner of Squire Patton Boggs in Leeds, said: “We are passionate about our position in the local market, and this move to new premises provides us with a platform for the firm’s future in the city.
“We have outstanding staff, a strong client base and great ambition for the future, which is demonstrated by the fact that we will now have first-rate facilities for our people and our clients here in Leeds. The legal sector has seen much consolidation over recent months. However, growth is very much on our agenda. “