In 1853, the Corporation's surveyor prepared plans for 32 houses in Merrick Square. These were built by Cooper and Bottomley of Old Kent Road and completed by 1856.

The Holy Trinity Rectory was built in 1872 between nos 16 and 17 and sold to the Church Commissioners. It housed the rector of Holy Trinity Church and then St Matthew's Church until the latter was rebuilt in 1994. The rectory was then repurchased by Trinity House and let to Great St Helen's Church, Bishopsgate. Merrick Square is still composed of single houses.