Repair gone awry?
More likely, abandoned when they discovered that the floor as well as ceiling are completely rotten through and a quite radical rebuild would be required to restore this back to a liveable condition...

What fascinates me is, that all three of the stone-walled buildings here had more than one storey (one even had three) - though there's quite a lot of space available around (that is, they've been built tall instead of long/wide).

And this very thing (namely decomposing of the wooden beams, supporting upper floors) seem to be the main reason for their downfall. If the houses had concrete floors, or - much simpler - sported only ground level and a limestone-shingled roof, like most houses in littoral region some 50 kilometres away (where heavy northern bora-wind often blows), they could last practically forever.
 
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Three hand-held exposures [ISO 160, 560, 2200]
abandoned farm homestead house building stone walls mouldy wooden beams broken doors roof ceiling plaster fallen down hole inthe floor old decrepit rotten decomposed crumpled unsound unsafe ruin ruined decay debris table chairs ladder wheelbarrow shovel pitchfork fusebox metal barrel basement hdr