Plas Llangefni was built around 1540 to 1550 by William Bulkeley. It was a two-storey rectangular plan house with a cellar and attic with a seventeenth century addition against the stack. Few original features remained by 1931 after extensive modernisation and it was demolished in 1944 or 1945.

J Hill, RCAHMW, 14 November 2003.