Current, rejected and proposed plans for Tan y Mynydd, Mynydd Nefyn. Screengrab from planning documents. A decision on plans to extend a house dubbed “more suited for Beverly Hills than Mynydd Nefyn” has been kicked into the long grass for now. Meeting on Monday, members of Gwynedd Council’s Planning Committee was asked to approve the refurbishment and extension of Tan-y-Mynydd on Mynydd Nefyn. This follows the refusal of earlier proposals for the same property last September, with the committee going against the advice of officers after citing the visual impact and claiming that approval would “open the floodgates” for similar developments.