Tanrallt was built in the twentieth century. It is a two-storey rendered structure on stone foundations with slate roofs with titled ridges and no eaves to the main gables. There is a large, tall chimney to the southern gable and another central chimney placed asymmetrically. There is a prominent central second-storey gabled advanced bay, timbered with bargeboards, over the main entrance though a stone segmental arch. To the right is a small dormer with a hipped roof over a segmental bay window under a heavy eave. The left-hand return has a single storey bay window. To the right is a detached one-car garage in a complementary style.

(Sources: Digital Investigators? Survey of Tranrallt, NMR Archive, 558313)
A.N. Coward, RCAHMW, 18.03.2019