Plas yn Eglwyseg has a double pile plan around a central stair hall, and was probably built in the early 19th century, with the attached farm building added mid century. The house is two-storeyed plus an attic, with a cellar at the S end. It has pitched slate roofs and gable stacks, with stone rubble walls and ashlar quoining. The front elevation, facing E, is of 3 bays, with a central 4-panelled door set under a bracketed gabled canopy. To either side are 3-light iron, small-paned casements set in timber frames and under segmental brick arches.
Source: DE/DOM/SJ24NW, from the Cadw listed buildings database
J. Archer, RCAHMW, 14.10.2004