Radlett was formed out of part of the parish of Aldenham in 1865

Christ Church, situated on Cobden Hill, near the site of a small chantry attached to the abbey of St Albans, and erected in 1864, is a building of flint and stone, banded with red brick, in the Early Decorated style, and consists of chancel, north trancept, north porch and a central tower, with octagonal broach spire, containing 8 tubular bells; the four-light east window is a memorial to Capt. William Robert Phillimore, of Newberries, who died 30 Nov. 1846, and Anna (West) his wife, who died 20 Dec. 1862, and there are other stained windows; in 1907 the south trancept was removed, a new nave and chancel built, the former nave converted into an aisle and the chancel into a side chapel, and new vestries and an organ chamber were also built, at a total cost of about £5,000. in 1910 a new organ was provided at a cost of £685: the church affords sittings for 480 persons. The register dates from the year 1865. The living is a vicarage, net value £254, with residence, in the gift of the vicar of Aldenham, and held since 1905 by the Rev. Arthur Prideaux Du Cane M.A. of Trinity College, Cambridge. [Kelly's Directory, 1912]