18-22, Warren Road and Treleaven House, 18 Blundellsands Road West

This is a block of four houses located at 18-22 Warren Road, and Treleaven House at 18 Blundellsands Road West, Crosby. The date 1867 is inscribed on a monogram plaque on Treleaven House; the building has been slightly altered since then. It is constructed of red brick with polychrome bands and white painted sandstone dressings, topped with steeply-pitched slate roofs. The architectural style is eclectic High Victorian.

The houses are arranged on a double-depth plan, oriented roughly north-west/south-east, facing south-west. Numbers 20 and 22 each have a single front, while Treleaven House acts as a crosswing on the left end, with a rectangular tower projecting from its front left corner. The facade of the block features polychrome sill bands and impost bands of blue and yellow brick, with elaborate detailing at the first floor level. A red brick Lombard frieze sits beneath the overhanging eaves.

Treleaven House includes a gabled porch on the left side, featuring a polychrome two-centred arched tympanum above a shouldered doorway and decorative gable coping with a finial. Four-pane sash windows are present on this side, primarily coupled and using arched polychrome tympani. The tower has coupled sashes at similar levels; those at ground floor have a rocketed colonnette, while others are single-light with a steep saddle-back roof swept over the eaves. The west front of Treleaven House has tripartite sashes on the main floors, with crocketed colonnettes at ground floor, stepped sashes at first floor, and coupled sashes at second floor, the latter positioned under a large blank arch with a carved tympanum and polychrome archband, which rises into a dormer with a prominently overhanging and bracketed hipped roof.

To the right of Treleaven House, numbers 18-22 share a continuous monopitched pentice roof that protects doorways and canted bay windows at ground floor level. Coupled sashes are present at the first floor, with crocketed colonnettes and squared-off triangular tympani. At second floor, three pairs of short sashes break the eaves, each with a coupled steeply-pitched, prominently overhanging swept slate roof on brackets. The corniced ridge chimneys have been reduced in height, notably the one at number 22. The rear of the building and its interior have not been inspected.