A study to develop options for the future of a Grade II-listed hall will look at how it can be brought back into use to benefit the community.
It follows the end of an exclusivity agreement between Rochdale Council and the US actor Hopwood DePree, whose ancestors once lived at Hopwood Hall in Middleton.
The authority will spend £100,000 on the feasibility study and £600,000 on roof repairs in the spring of 2025.
The council said the building was “very important” and the study would “explore all options for its future”.