River Block at Royal Wilton Carpet Factory

The River Block at the Royal Wilton Carpet Factory is a mid to late 18th century building featuring three storeys and an attic. It is constructed of colour-washed brick, with the left end accented by quoins and offset eaves courses. The roof is a half-hipped mansard style, covered with old tiles, and includes five dormer windows, with a central gabled dormer.

The building has a seven-bay front, with a central entrance on the first floor accessed by a flight of concrete steps that have plain wrought-iron railings, with the lower sections twisted. On the ground floor, there are two entrances set within slight wall thickening, both topped with moulded brick cornices. The left entrance has been converted into a window beneath a segmental relieving arch, while the right entrance remains a plain door, above which is a datestone inscribed with "1655 T W".

Flanking the River Block are two wings. The left wing is older, consisting of two storeys, with the first floor clad in corrugated iron and featuring four two-light small pane casements. The ground floor has a wide central entrance and a Venetian-type small pane window in a slight recess, with traces of timber-framing visible at the left end. The right wing, dating from around 1800, is a tall three-storey block made of gault brick with six bays. It has segmental-headed windows on the second floor and round-headed windows on the ground and first floors, which feature radiating glazing and small panes.

In the angle between the centre and left parts of the building, there is a modern lift or drying tower. The quadrangle is closed to the southeast by a canteen wing, which is a mid-19th century two-storey structure made of red and gault brick, featuring a seven-bay design with a sawtooth eaves cornice.