Disused farm buildings at Parrox Hall Farm, in Park Lane, Preesall, could be converted into a cafe and garden nursery, if planners at Wyre Council agree.
Parrox Hall is said to be one of the old houses in Lancashire, dating back to at least 1456, and the hall itself is a listed building.
"In order to generate additional income, the estate wishes to develop the nearby Parrox Hall Farm buildings into a small visitor attraction accommodating a cafe and garden nursery," documents lodged with the authority said.
"The existing farm tenant is leaving the farm for another, allowing the existing buildings to be converted to an alternative use.
"In addition to the cafe and nursery, the existing bale base will be used as a new parking area for both the new facilities and visitors to the hall."
The planning application was lodged by the hall's estate, care of owner Dr Harold Elletson, the former Blackpool Tory MP.
Council planners will examine the application, and consider any comments submitted by neighbours, before making a final decision.