Stackhouse will be taking on the role of tax director, whereas Cox is set to start out as a new partner.
As a leading tax professional, Stackhouse has worked for two of the Big Four companies specialising in corporate and property tax advice.
Cox has more than 20 years of experience as an adviser on numerous tax issues, including acquisitions, capital allowances, inheritance tax and corporate reconstructing.
Cox and Stackhouse join the Preston office just after the appointment of private client specialist Pam Maddock in April. These new additions to the team will provide support for a growing number of regional clients.