Late 19th Century.
Plas Alltran was designed by architect Arthur Baker F.R.I.B.A. and built by Owen Morris of Caernarfon. Plas Alltran was the first medical Doctor's surgery in Holyhead, serving also as a place of residence. The building was commissioned by Jane Henrietta Adeane (O.B.E), a niece of Hon. W.O Stanley of Penrhos, in 1890-1891, as part of a wider redevelopment of the Blackbridge area of Holyhead and is characterised by the crow stepped gables and splayed gutterless eaves, seen elsewhere at Plas Mawr in Conwy.
M. Powel, RCAHMW. October 2023.
Sources: Plas Tanalltran, Anglesey, Archaeological Building Survey, conducted by C.R Archaeology on Behalf of Isle of Anglesey County Council, 2017; Cadw Listing Summary ref: 5727