10 flats. Built in 1990
Cymedeithas Tai Gogledd Cymru Cyf, Plas Adda, Agorwyd Gan Oscar Mathieson BA 23 Tachwedd 1991
North Wales Housing Ltd, Plas Adda, opened by Oscar Mathieson BA 23rd November 1991
Mr. Oscar Mathieson was the Chief Housing Officer, Arfon Borough Council.
The site of a former Public House, The corner plot refered to as 'PH' in numerous maps. (Possibly the "Glanadda Inn")
Also nearby are 2 other sets of flats