No 25, including No 3 Conduit Lane

No 25, which includes No 3 Conduit Lane, is an early 19th-century house that forms a pair with No 24. The exterior features unpainted render and a slate gabled roof with flanking stacks. The building stands three storeys tall and has three bays, with moulded paired brackets at the eaves, a raised plinth, and tripartite sash windows in the outer bays of the upper floors, along with a narrower sash window in the middle. The first floor has taller windows, and the sashes are adorned with marginal glazing bars, while the centre windows feature etched and coloured glass margins.

The later 19th-century shop front consists of three windows: one on the left, a narrow one in the centre paired with a shop door, and another immediately to the right. The middle window may have replaced a door and is framed by fluted pilasters (renewed in the late 20th century) with an overall fascia and cornice. The fascia displays ceramic letters reading "25 Dispensing Chemist 25" and a plaque stating "St. Peter's Pharmacy Est. 1869." The gable end facing Conduit Lane is slate-hung.

There is a short length of iron railings at the angle between No 25 and No 3 Conduit Lane, featuring plain spearheads with a 20th-century added row of rails above. No 3 Conduit Lane is a low two-storey range with 20th-century windows on each floor in the end wall, which is positioned at right angles to the end wall of No 25. Its roughcast facade has a close-eaved roof, a fixed 9-pane window with an iron grille to the left, a panelled door to the left of centre, and a 20th-century metal 6-pane casement on the first floor to the right. There is a rebuilt brick chimney at the right end.

Inside, the later 19th-century to early 20th-century pharmacist shop fittings include glass-fronted and topped counters, glass-handled drawers, and shelves behind the counter, possibly made of mahogany. A half-glazed panelled door leads to the rest of the house. The upper floors feature plain, wide, and uneven stairs, while the two main reception rooms have fire surrounds with ornate scrolled brackets on the mantelpieces. There are worn and uneven slate steps, likely predating the 19th century, leading down to the cellar, which is believed to retain traces of the White Gate of the medieval town and possibly Roman cobbles beneath the slates, although little is visible at the time of resurvey. In No 3, there are four fielded-panelled doors and thin ceiling joists on the ground floor.