Oxford Circus Underground Station at the north-east corner of Argyll Street and Oxford Street, including offices above

Oxford Circus Underground Station is located at the north-east corner of Argyll Street and Oxford Street, and includes offices above. The building features pinkish-buff terracotta and red brick with a slate roof.

The lower storey consists of the original station building designed by Measures, which is entirely clad in terracotta and showcases Mannerist detailing. The entrances are flanked by pilasters with capitals adorned with masks and scroll brackets, supporting a cornice and frieze decorated with moulded swags and cornucopias. The short elevation facing Oxford Street contains the main entrance, which is now an exit, featuring a broad segmental archway that was originally glazed with timber mullions. This archway now includes an openwork transom panel with diamond bracing. Above it is a large cartouche that rises into a gable, although its cherub finial is now missing. The longer elevation along Argyll Street has two smaller segment-headed entrances, one of which has been altered from an original window, and between these are two similar openings that house shops. In the center, a narrower doorway with a glazed overlight provides access to the upper floors. A curved corner section features a metal-framed kiosk with bowed sides bearing monograms, which was added before 1927 and is now blocked.

The four upper storeys, designed by Joseph, are constructed of red brick with buff terracotta dressings and window bays that match the base. The building is in the Flemish Renaissance style. On the Oxford Street side, there are two tall canted bays with projecting transoms and string-courses, culminating in a broad scrolled gable topped by a dragon finial. A round corner turret features transom windows and a conical roof. On the Argyll Street side, there is a recessed canted bay with mullioned windows that rise into another scrolled gable. The right-hand section is slightly misaligned and has one square bay and two canted bays, with plain dormers above instead of gables.

The interiors of the station have been extensively remodeled and do not retain any visible features of interest. The interior of the upper-floor offices has not been inspected.