Plas Brondanw in Garreg, Llanfrothen, Gwynedd, North Wales, was the family home of Clough Williams-Ellis, creator of the Italianate village Portmeirion, and elements of similar architectural styles can be seen at both locations. It is a grade II* listed building. The gardens, in a series of garden rooms enclosed by yew hedges and open lawns, linked by carefully planned vistas, is one of only three Grade I listed gardens in Gwynedd.
Plas Brondanw stands on the road to the tiny village of Croesor and the distinctive Snowdonia mountain named Cnicht, within the Snowdonia National Park.