Tregarnedd, Llangefni

Has been described as a Questionable Fortified Manor House

There are uncertain remains

NameTregarnedd, Llangefni
Alternative NamesTre-Garnedd Moated Site
Historic CountryAnglesey
Modern AuthorityAnglesey
1974 AuthorityGwynedd

The south and western branches of Tre-Garnedd moat are the only remains of a medieval mansion on the edge of Malltraeth Marsh. It was once the seat of Gruffydd ap Rhys or Llwyd, who was knighted by 1301 and was the leading Welshman of north Wales through the earlier fourteenth century. There is a tradition of a siege in 1322. This is a rectangular enclosure, roughly 70m north-south by 90m, defined on the south and west sides by a slight bank and a broad ditch or moat, 8.5-12m wide. The moat acts as a pond at its south-western angle. It is overlain by modern farm buildings. There were said to be visible traces of the house in the twentieth century. (Coflein–John Wiles 03.09.07)

A square enclosure defined by an internal bank and ditch, which survive only on the NW and SW sides. At the W corner the bank remains standing to a height of some 3 m above the bottom of the ditch, which is 5.5 m wide, and just over 1 m above the level of the interior. At the W end of the SW side the ditch/moat has been filled in, and a track runs through to the farm buildings. The interior, about 100 m square, has been much levelled and built over, and only the S corner appears to hav escaped relatively unscathed. Two large cattle sheds and a modern bungalow occupy much of the N part of the site. A section of the NE bank is visible where a ditch has been dug alongside the track which runs along the SE side of the site. (Scheduling Report)

This site is a scheduled monument protected by law

Not Listed

The National Monument Record (Coflein) number(s)
County Historic Environment Record
OS Map Grid ReferenceSH468746
HyperLink HyperLink HyperLink

No photos available. If you can provide pictures please contact Castlefacts

Most of the sites or buildings recorded in this web site are NOT open to the public and permission to visit a site must always be sought from the landowner or tenant.

Calculate Print


  • Salter, Mike, 1997, The Castles of North Wales (Malvern) p. 49 (slight)
  • RCAHMW, 1937, An inventory of the ancient monuments in Anglesey (HMSO) p. cxlvii p. 90-1 no. 3 online copy
  • Lewis, Samual, 1849, A Topographical Dictionary of Wales online copy