1-21, Cornwall Terrace Nw1

Cornwall Terrace comprises a long, unified terrace of numbers 1 to 21, with numbers 20 and 21 forming an additional pair. Built between 1821 and 1823, it was designed by Decimus Burton under the supervision of John Nash, and represents the first terrace constructed within Nash’s Regent’s Park Crown Estate. The building was restored in 1980. Constructed of stucco with slate roofs, the terrace fronts directly onto the road, with a garden located only at the north pavilion end and in front of numbers 20 and 21. It is designed in a Graeco-Roman style, with the overall layout conceived by Nash, punctuated by "palatial" porticoed pavilion compositions at the centre and ends. The return of number 1 includes a two-storey bowed facade with caryatids flanking the first-floor sashes. Numbers 20 and 21 are designed as a porticoed pair developed from the south pavilion design. The terrace is three storeys high, with attic storeys to the pavilions and dormered mansards between, incorporating basements. The ground floor features square-headed recessed, shallow porches with tripartite openings and square-headed doorways within channelled stucco. Recessed glazing bar sash windows are set within shallow architraves, with prominent first-floor cornices to the main ranges. The central pavilion has a giant hexastyle Corinthian portico linked to slightly advanced wings featuring pilasters and columns in antis. The end pavilions incorporate tetrastyle porticoes and pilastered wings. The central pavilion’s portico pediment sits atop the main entablature, above the attic, while the end pavilions have simpler, pedimented attics above their porticoes. The wings of each pavilion feature inscribed Venetian windows to the first floor. The north return of number 1 has a two-storey bowed facade with caryatids flanking the sashes on the first floor. Balustraded parapets screen the dormers of the main ranges. Numbers 20 and 21 share similar detailing, including coupled doorways within their porticos. Cast iron geometric patterned balconies are present on the first floor of the main ranges, with similar guard rails to the porticos. Spearhead area railings enclose the property.