Chalk Farm Underground Station

Chalk Farm Underground Station is a station building dating from 1906, situated at the corner of Adelaide Road and Haverstock Hill. It is a group value building of the second grade. The station is constructed with a steel frame clad in brick, and the brickwork is faced with ox-blood red faience manufactured by the Leeds Fireclay Co Ltd.

The station occupies a prominent and angled site and is two storeys high. Originally, entrances and exits were provided on both Adelaide Road and Haverstock Hill, but the entrance on the north side has since been blocked. The Adelaide Road elevation is the longest of the Green stations and features eight pilastered bays arranged 3-1-1-3 with alternating half-bays, creating a continuous arcade that ends in a half-bay to the west. The entrance is located in the bay second from the west, while a former exit further east is now occupied by a shop. The curved apex of the building is emphasized by an overhanging upper floor featuring a pedimented tripartite window. A shop, originally an Express Dairy, was always present on the ground floor and extended into three bays on both sides of the corner. The shop front is modern. The shorter north elevation has a similar design with six bays arranged 2-1-1-2, with the eastern single bay serving as an entrance. Original windows remain in some bays on both elevations, while others have been filled with faience. The upper storey has timber Diocletian windows set within keyed semi-circular arches decorated with egg-and-dart moulding and cartouches between the arcaded bays. A modillion cornice runs along the top, and each half-bay has a deeply hooded oeil-de-boeuf (bullseye) window.

Blue tile signs with white relief lettering reading UNDERGROUND were added in 1908 above the entrance, the former exit on the north side, and the apex shop front. Frieze lettering has since been removed. A 1930s Underground sign with a pole and roundel is positioned to the right of the entrance.

The ticket hall retains original features including moulded cornices, an early brass clock, a six-panelled door with paterae decoration, fluted timber wall banding, and railings enclosing the top of the stairwell. The tiling pattern has been replicated to the 1906 design. Some original mauve terrazzo flooring remains in the disused exit area behind the lifts. Original dark red and cream tiling survives in the spiral staircase and lower corridors, with the platform tiling replicated in 2005, except for the soffit banding and some remnants of original directional signs.