House appears to have at least 3 building phases, the left cross wing having a date of 1739 but with remodelling carried out in the later 19th century. It abuts the main range which appears to be earlier 19th century, though with some later features to the side. The datestone with initials, above front door, is not clear. It may have originated as a farmhouse but later functioned more as a gentleman's house, with generous stabling and with some landscaping and tree-planting to enhance the approach. The Tithe Map of 1846 shows a rectangular building - called Tilla Gwyn - without a cross wing or stables and with a different approach, plus an additional building further to the south. The First Edition OS map of 1886 shows the layout as at present, dating the alterations roughly to the third quarter of 19th century, supported by the 1866 stable date. There is reference to past owners as Davies and also Thomas, and local notes, perhaps dating to the late 19th century, refer to a coal level owned by Mr Thomas of Tylagwyn.

A house which is roughly L-shaped in plan, now divided into 2 dwellings. It is constructed of stone rubble with Welsh slate roofs and corniced ridge stacks. The main range has a symmetrical, 2 storey, frontage, and forms a 3-window range with 6/6 pane sashes, some horned, with cambered voussoirs and shallow sills. There is a central stable-type boarded door with a plain overlight.
Projecting to the left is the gable end of the cross wing with an attic window in the apex. This is a two storey, 2 window range of similar, though larger, sashes and with rockfaced quoins.
To the side of the main range the windows have later brick surrounds. To rear there are 3 similar, cambered-headed, horned sashes to the first floor, smaller, similarly arched, altered casements to the ground floor and rear door. There are high, rear, external stacks with offsets at the junction between the dwellings. At right end the different build is shown by the awkward angle of the rear wall and the swept eaves.
(Source; Cadw listing database) S Fielding RCAHMW 24/07/2006