The merger will take effect on 1 August, creating a firm with 12 offices across Lincolnshire and eastern Yorkshire and a total staff headcount of 351.
Wilkin Chapman was ranked 145th in The Lawyer UK200 Annual Report in 2009 with a turnover of £12m for the 2008-09 financial year. The merger will see the combined firm leap up to a ranking of 126, overtaking firms such as Edwin Coe, Collyer Bristow and Rosenblatt.
The new firm will be known as Wilkin Chapman Grange in Grimsby, Cleethorpes, Louth, Horncastle, Sutton-on-Sea, Mablethorpe, Alford and Market Rasen.
In Lincoln the firm will go by the name Wilkin Chapman Epton Blades, and Cooper Wilkin Chapman in Beverley.
Wilkin Chapman’s senior partner Philip Day, who specialises in agriculture and commercial property, will continue his role at the new firm, as will the firm’s chief executive Julia Whittaker. Grange Wintringham senior partner Stephen Savage will join the new firm’s strategy committee.
The firm will comprise 10 departments: corporate and commercial; commercial property; domestic property; family and mediation; litigation and employment; wills, probate and tax; personal injury; crime and courts martial; debt recovery; and agriculture.
“Our new firm will be a dominant regional presence delivering an unparalleled range of legal services to local and national clients,” said Savage. “We’re tremendously excited by the opportunities this offers to our valued clients and staff.”