No. 1 and Attached Railings and Vaults

No. 1 Fountain Buildings is a house, now converted to flats, dating from around 1775, with later 19th-century alterations and a 20th-century conversion. It may have been designed by John Wood the Younger. The front of the house is built of limestone ashlar, with rubble construction visible below the basement windows, while the rear is not visible. It has a mansard roof covered with Welsh slate to the front. The side and end walls are topped with coped gables and ashlar stacks, including a shared stack to the left with No. 2 Fountain Buildings.

The house is three storeys high, with an attic and basement, and has a six-window front. The first floor has six six-over-six sash windows set into splayed, cyma moulded architraves with friezes and cornices, the central left window with a pediment. The ground floor features four similar sash windows with splayed jambs. A six-panel door with fielded and glazed panels and a cast iron knocker is set in a stone doorcase with a cyma moulded architrave, leading to a pennant-paved crossover with bases of two 19th-century cast iron footscrapers. To the far right is another six-panel door with a simple fanlight. The basement has four six-over-six sash windows with stone sills. Two sets of basement windows have wrought iron bars with shaped heads. Vault entrances are also present in the basement, accessible by a pennant-paved area with steps. The roof features two double and two single dormers with plate glass sashes.

The interior of the house has not been inspected. Subsidiary features include attached wrought iron railings and a gate with shaped and scrolled heads on limestone bases. The building, along with others in the area, was built by William Philips and incorporates an earlier structure. From 1853 onwards, the building housed the architectural practices of Manners and Gill, JE Gill, Browne and Gill, and Wallace Gill.