When the war ended, the existing tenants were given the opportunity to buy their properties and the remaining estate, covering thousands of acres, was sold off.

Anglesey Aluminium granted public access in 1972 under the direction of Ken Williams, a local policeman and amateur naturalist.

On 6 November 2013, Land & Lakes Anglesey Ltd were successful, gaining approval for their planning application for a leisure centre to be constructed on the coastal landscape, an Area of Outstanding Natural Beauty.

The development was intended to initially offer accommodation and transport options for a proportion of the incoming construction workforce for the proposed new Wylfa power station approximately 15 miles (24 km) away.

[citation needed] If the development proceeds, it will bring about the closure of most of the Penrhos Nature Reserve to the public as it is now known.