The basements underwent thorough renovation and damp-proofing, including horizontal injection and foundation reinforcement using the geopolymer method. New sanitary facilities, technical rooms, and museum backroom space were created here.

On the ground floor, the former catering and library rooms have been given new functions. Modern exhibition rooms for the Staszów Region Museum, a tourist information point, a restaurant with kitchen facilities, and a souvenir shop have been created. Everything was finished with attention to detail – natural stone, wooden joinery, and restoration plaster ensured consistency with the character of the building.

The attic was transformed into a cultural center with a café, a senior club, a conference room, a mini cinema, and an exhibition space. The roof structure was replaced, restoring the traditional tile roofing, and new copper flashings and gutters were installed.