1-5, REGENT'S PARK NW1 (See details for further address information)

Nos 1 to 5, Regent's Park, is a unified terrace block built around 1821-22 by John Nash as part of his Regent's Park Crown Estate development. The building has been gutted and rebuilt internally as one unit. It features a stucco exterior and a slate roof, designed to appear as a single free-standing composition, with the former end houses acting as pavilions. The entrances were originally located at the rear and north ends, creating a similar grand illusion as seen at York Terrace East and West.

The architectural style includes Grecian details, with a giant Ionic Illissian order similar to that of York Terrace. The structure has four storeys, including an attic, and is eleven windows wide, with slightly advanced returns at the entrances. The ground floor has a rusticated podium, with windows set in a deep arcade between the end pavilions, each featuring a tripartite segmental arched window. The first and second floors have glazing bar sash windows set within a giant engaged Ionic colonnade, while the end pavilions boast tall tripartite first-floor windows with segmental arched blind lunettes and eared architrave second-floor windows.

The attic features semicircular arched blind-headed windows and thermal windows in the pavilions. A cornice and balustraded parapet sit above the ground floor, with a continuous plain frieze and cornice over the second floor, and an attic cornice and blocking course. The three window returns include large enclosed porches supported by Greek Doric columns in antis. The rear elevation has plain pilastraded upper floors, and the first-floor pavilion windows on the front are adorned with anthemion patterned cast iron balconettes. The area railings are finished with Grecian palmette finials. York Gate was a modification in Nash's plan to create a vista of Hardwick's new church of St Mary on Marylebone Road, balanced by the identical block at Nos 8 to 12.