The remains of an earlier building have been found beneath Bridge Cottage in Uckfield as archaeologists explore the site.
The building hasn’t yet been dated but it appears to have burned down. Uckfield Preservation Society chairman Mick Harker said there seemed to be a lot of charcoal and ash around it.
And Mr Harker said there might have been an even earlier building too because post holes have been discovered, though they would be more difficult to date.
Bridge Cottage was built in 1436 and so the discovery of fragments of stone walls which appeared to show half of a previous property was of great interest to archaeologists.
Mr Harker said specialists from University College London were helping to date it.
Uckfield Preservation Society has been given a grant of more than £1 million towards the restoration of Bridge Cottage and create a heritage centre within the building.
Videos are being made as work progresses.
This one was made just before the archaeologists moved in.
Links to more Uckfield News stories about Bridge Cottage can be seen here: Bridge Cottage disappears from view behind fence