Monaughty House (or Mynachdy,[1] Welsh for 'Monastery') stands in the community of Llangunllo, Powys, Wales.

Dating from c. 1565, it is one of the oldest stone-built houses in the county and a Grade I listed building.

Monaughty House stands south-east of the village of Llangunllo in the eastern part of Powys, close to the border with England.

[a][b][2][5] James Price, the builder of the house, was a beneficiary of the dissolution of the monasteries, Monaughty was built on the site of a grange belonging to Cwmhir Abbey.

[6] Peter Smith notes that further work was undertaken in the 1630s, including the creation of a staircase leading off the central hall.