Conlon Construction has been selected to carry out the £1.7m redevelopment of the Museum of Lancashire on Stanley Street in Preston.
Plans for the museum, housed in the Grade 2-listed former Preston Quarter Sessions House, include a new entrance area with reception, shop, café and displays; a Lancashire Through Time gallery; areas focusing on Lancashire entertainers, local industry, Lancashire at war and law and order.
The project is financed by the Heritage Lottery Fund and Lancashire County Council, along with donations from the Friends of the Museum of Lancashire, the Queens Lancashire Regiment and the Trustees of the Fusiliers Collection.
Michael Conlon, construction director, said: "The development of the museum is a fantastic project to be involved in, and I'll definitely be recommending that people pay the attraction a visit. We are looking forward to creating an impressive space with exciting new exhibit areas and facilities."
Work is set to begin in November and take 12 months to complete.