Claremont Square: Historic Georgian Garden Square and Harry Potter Filming Site

A Georgian Garden Square Rooted in London's Water History

Claremont Square is nestled in the Angel area of Islington, London, and dates back to the 1820s. It was developed by the New River Company around the Upper Pond reservoir, a water storage site originally built in 1709 and covered over in 1852. This reservoir was part of the New River, an engineered water supply channel created in 1613 to bring fresh water into London. The square’s central green mound, which conceals the reservoir, is dotted with mature trees on all four embanked sides, creating a serene oasis amidst the urban environment.

Architectural Charm and Residential Heritage

Surrounding the square are early-19th-century Georgian houses, primarily lining the south, east, and west sides. These homes were originally occupied by respectable middle-class residents such as merchants and clergymen. The west side, initially called Myddelton Terrace after Sir Hugh Myddelton—the engineer behind the New River—was constructed starting in 1821, with the square largely completed by 1828. The north side faces Pentonville Road and features more modern recessed apartment and office buildings, contrasting with the historic charm of the other sides.

Claremont Square in Popular Culture

Claremont Square gained international recognition as the filming location for 12 Grimmauld Place, the hidden family home of Sirius Black in the Harry Potter film series. The square’s Georgian façades stood in for this magical address, which serves as the Order of the Phoenix’s headquarters in the films. Fans of the series often visit to see the iconic exterior shots, connecting the quiet garden square with the wizarding world.

Natural Beauty and Urban Tranquility

The green space at the heart of Claremont Square spans approximately 1.72 acres, providing a peaceful retreat with its mature trees and wildflowers. While the central area is not accessible to the public due to the reservoir beneath, the surrounding pavements and the square’s layout offer a calm environment for relaxation and reflection. The square’s elevated position on the south side of Pentonville Road adds to its quiet charm, away from the bustle of central London.

Notable Residents and Historical Footnotes

Over the years, Claremont Square has been home to notable figures such as Robert Kemp Philp, a Chartist and editor, and Margery Moore, a musician and composer. The square’s history is layered with stories of its residents and its transformation from a functional water reservoir site to a distinguished residential and cultural landmark.

Experience and Atmosphere Today

Today, Claremont Square remains a cherished green space in London, combining historical significance, architectural beauty, and a touch of cinematic fame. It offers visitors a glimpse into early 19th-century urban planning and the opportunity to enjoy a quiet garden square with a rich backstory and a magical connection to popular culture.