He advised the Parliamentary Commissioners on the building of new churches from 1818 onwards, contributing seven himself, six were in the Greek revival style, the exception being the church at Tyldesley that is in the Gothic revival style:
St Anne's, Wandsworth (1820–22).

St John's, Chatham, Kent (1821–22).

St James, West Hackney (1821–3) bombed during The Blitz in 1940 and 1941 and later demolished.

St George, Brandon Hill, Bristol (1821–23).

St George, Tyldesley (1821–4).

St Mary's, Bryanston Square, London (1821–3).

St Philip's Church, Salford, Greater Manchester (1822–4); a copy of St Mary's with only minor variations.

Smirke also designed churches for clients other than the commissioners, these included:
Belgrave Chapel, London 1812, demolished c. 1910.

St Nicholas Strood, this was a rebuilding in 1812 of a medieval church, the tower of which has been retained, and is in a simplified classical style.

the Milton Mausoleum at Milton, Nottinghamshire (1831–32) for Henry Pelham-Clinton, 4th Duke of Newcastle.

The parish church of St. Peter's at Askham, Cumbria 1832, in a Neo-Norman style.

The Church of St Peter, Milton Bryan, Bedfordshire addition of north transept to church by Lewis Nockalls Cottingham.
He advised the Parliamentary Commissioners on the building of new churches from 1818 onwards, contributing seven himself, six were in the Greek revival style, the exception being the church at Tyldesley that is in the Gothic revival style:
St Anne's, Wandsworth (1820–22).
St John's, Chatham, Kent (1821–22).
St James, West Hackney (1821–3) bombed during The Blitz in 1940 and 1941 and later demolished.
St George, Brandon Hill, Bristol (1821–23).
St George, Tyldesley (1821–4).
St Mary's, Bryanston Square, London (1821–3).
St Philip's Church, Salford, Greater Manchester (1822–4); a copy of St Mary's with only minor variations.
Smirke also designed churches for clients other than the commissioners, these included:
Belgrave Chapel, London 1812, demolished c. 1910.
St Nicholas Strood, this was a rebuilding in 1812 of a medieval church, the tower of which has been retained, and is in a simplified classical style.
the Milton Mausoleum at Milton, Nottinghamshire (1831–32) for Henry Pelham-Clinton, 4th Duke of Newcastle.
The parish church of St. Peter's at Askham, Cumbria 1832, in a Neo-Norman style.
The Church of St Peter, Milton Bryan, Bedfordshire addition of north transept to church by Lewis Nockalls Cottingham.
Robert Smirke (architect)