As it stood in the early 19th century, the church consisted of an unaisled nave, a chancel without a chancel arch and a western tower.
The south porch had served as a vestry since the 18th century.

By 1847 the Old Church was derelict, but in view of the growth of population in the southern part of the parish, it was decided to restore it. (
Victorian restoration of churches is not what we understand today by the phrase building restoration.)
The architect of the alterations was Alexander Dick Gough.
The old tower was removed, allowing the nave to be extended westwards, and a new tower was built on the south side.
The south porch was removed, and a new vestry was added on the north side.
The whole exterior of the church was refaced or reworked.
The enlargement and the addition of galleries increased the capacity of the church from about 120 to 500.

There were further restorations in 1888 by Arthur Blomfield with the reredos by C E Buckeridge; in 1925 when the plaster ceiling and the side galleries were removed, and in 1948 following Second World War bomb damage.
The building was designated a grade II* listed building on 10 June 1954.
As it stood in the early 19th century, the church consisted of an unaisled nave, a chancel without a chancel arch and a western tower. The south porch had served as a vestry since the 18th century.
By 1847 the Old Church was derelict, but in view of the growth of population in the southern part of the parish, it was decided to restore it. (Victorian restoration of churches is not what we understand today by the phrase building restoration.) The architect of the alterations was Alexander Dick Gough. The old tower was removed, allowing the nave to be extended westwards, and a new tower was built on the south side. The south porch was removed, and a new vestry was added on the north side. The whole exterior of the church was refaced or reworked. The enlargement and the addition of galleries increased the capacity of the church from about 120 to 500.
There were further restorations in 1888 by Arthur Blomfield with the reredos by C E Buckeridge; in 1925 when the plaster ceiling and the side galleries were removed, and in 1948 following Second World War bomb damage. The building was designated a grade II* listed building on 10 June 1954.
St Pancras Old Church