Nos. 41 & 43 Lon Isa

Nos. 41 and 43 Lon Isa are a pair of semi-detached houses, classified as Rhiwbina Type 1, built in the 20th century. They are two storeys high, constructed of brown brick, and feature a hipped slate roof with a central brick chimney and tall brick stacks at both ends. The front of the pair has four windows. The central two bays on each floor have tripartite small-pane sash windows, with a central 12-pane sash flanked by narrow sashes, and tile voussoirs on the ground floor. The outer bays contain 16-pane sash windows on the upper floors. On the ground floor, the outer bays have splayed bay windows, each with a small-pane sash window on each face. The entrances are located on the sides, with doorways beneath flat hoods, and there are a pair of windows towards the rear on the upper floor.