Experts are due to begin digging into the past of Southwick's oldest surviving house tomorrow.
Archaeologists and local history enthusiasts will excavate the area around Manor Cottage's west wing in Southwick Street.
The building dates from the 14th Century and was an open hall.
It was believed to have been built for bailiffs running an estate owned by the monks of Reigate Priory.
The west wing was partially demolished 30 years ago. Restoration work is expected to start when archaeological investigations are complete.
The work will be carried out by experts from Archaeology South East and volunteers from the Southwick Society.
Southwick Society secretary Nigel Divers said: "It would be good to find a medieval rubbish pit as it could tell us much about the people who lived here."
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