Watts Hall (Old Meeting Congregational Church)

Watts Hall, also known as the Old Meeting Congregational Church, is the original chapel built in 1716 and is the only significant chapel constructed in Middlesex during the first half of the 18th century. It was formally established as a Congregational polity in 1833. A schoolroom was added in 1828. Major alterations began in 1883, designed by architect John Sulman from Holborn, which included lengthening and heightening the chapel, as well as adding an entrance tower at the High Street end.

The building is primarily made of brick, mostly rendered, except for the southwest wall and the tower, which have slated roofs. It now consists of four bays in length. The northwest wall features two original windows, with a matching one inserted between them in place of the original door. The northeast wall displays original brickwork up to the former eaves level, with the tops of two original windows remaining as lunettes above the wall of the added vestry extension. The old windows, along with the three tall windows in the southwest wall, are all round-arched, except for the square tower, which has a pyramidal roof.