21 Great Oak Street

21 Great Oak Street is a mid-19th century building inspired by late Georgian architecture. It is a three-storey structure with a single window front set in reflected pairs. The front is finished in scribed cement render, featuring a plinth and quoins. The overall slate roof has wide bracket eaves and blue brick chimney stacks. The building has horned six-pane sash windows, and most of the shop windows are four-pane with cornices. There are modern alterations to No 19. Alderson's, located between Nos 19 and 20, has a broader full-width shop front with a plate glass window and end pilasters beneath an overall cornice. The doors are part glazed, except for No 20.

No 17 extends around the corner into High Street, sharing a similar scribed cement render elevation, horned six-pane sashes, and a modern small shop window. Nos 45 and 46 High Street are adjacent to the left, beyond a round arched opening that leads to the passage for the rear yard. This archway features an architrave, keystone, and a boarded door. The right-hand gable end and rear elevations are slate hung and include casement windows, along with a modern single-storey brick cross range. There is a tall brick stack at the rear of Nos 45 and 46, which has some metal frame casement windows. The first and ground floors are made of rubble with a brick lean-to.

The cobbled yard is enclosed to the south and west by brick outbuilding ranges that have small pane metal frame windows with cambered heads. The outbuilding to the west is the cross range to No 22 Great Oak Street.