It is certain that the West Harnham church was built or re-built by 1115, the date when King Henry I signed a charter granting certain churches to Salisbury Cathedral, including the church at Harnham.
A mid-12th-century door survives in the north wall of the nave; the font bowl is also from that century.
The chancel was lengthened in the "E.E. style" (i.e. during the 13th century), and probably in the early 14th century the Trinity Chapel on the south side was built.

St George's had some remodelling c1300, and 1300–30 is the indicated date of the south chapel; its tower mostly early 19th century, probably on the site of an earlier tower.
William Butterfield led its careful restoration (1873–4).
He was responsible in the 1850s for the great church of All Saints, Margaret Street, London which broke new ground in its use of brick and of extensive polychromy detailing.
The church was designated as Grade II* listed in 1952.
It is certain that the West Harnham church was built or re-built by 1115, the date when King Henry I signed a charter granting certain churches to Salisbury Cathedral, including the church at Harnham. A mid-12th-century door survives in the north wall of the nave; the font bowl is also from that century. The chancel was lengthened in the "E.E. style" (i.e. during the 13th century), and probably in the early 14th century the Trinity Chapel on the south side was built.
St George's had some remodelling c1300, and 1300–30 is the indicated date of the south chapel; its tower mostly early 19th century, probably on the site of an earlier tower. William Butterfield led its careful restoration (1873–4). He was responsible in the 1850s for the great church of All Saints, Margaret Street, London which broke new ground in its use of brick and of extensive polychromy detailing. The church was designated as Grade II* listed in 1952.
Harnham