In Gwynedd, 150 homes that were recorded as chargeable second homes on 13 April 2023 could not be matched to a corresponding record on 13 April 2024.
Yng Ngwynedd, nid oedd modd paru 150 o gartrefi a gofnodwyd fel ail gartrefi trethadwy ar 13 Ebrill 2023 â chofnod cyfatebol ar 13 Ebrill 2024.