It does not occupy a position in a nucleated village with just a handful of properties including the Grade II Glebe House (formerly the Rectory)[3] adjacent to its boundaries.

[11] In the south-east corner is the chapel of the Blessed Mary, altered in the 15th-century and the resting place of benefactor Sir Hugh Halsham[11] The entrance to the church is via a late medieval porch constructed of Sussex winklestone and unusually on the north side.

The distinctive herringbone masonry visible externally and the narrow rounded windows into the porch are Romanesque and characteristic of the 10th-century and thus before the Norman Invasion.

There are a number of other features that have survived the iconoclasm of the Reformation, no doubt due to the strong recusant tradition of local families that included the Carylls, who purchased West Grinstead manor in the 1620s.

There are important brasses of Lord and Lady Halsham dating to the 1440s[18] and a piscina, a stone basin used for the ablution of the communion vessels after Mass in Catholic and pre-Reformation churches remains.

On the west wall of the chapel is a Baroque cartouche shaped mural to Richard Caryll (d.1701) and his wife Frances (d.1704) and to his brother Peter, a benedictine monk who died at the English seminary in Douai.

[2] On the south wall is a marble memorial to Sir Merrik Burrell, governor of the Bank of England from 1758 to 1760 who had bought the West Grinstead estate in 1744.

[23] The large memorial in the south aisle, with a decorative funerary Roman vase motif is dedicated to Sussex historian Sir William Burrell (1732 - 1796) and his wife, Sophia Raymond.

Flaxman who later worked on designs for Josiah Wedgwood also created a sister monument to Burrell at Holy Trinity Church, Cuckfield.

[24] In the south aisle is the large and impressive marble monument to William and Elizabeth Powlett by the Flemish sculptor J.M.Rysbrack (1694 - 1770) [25] featuring two life size figures leaning on a romanesque funerary urn.

[2] The north wall has a set of 15th-century Lancet windows although the stained glass depicting St.George flanked by St.Anne, St.Mary and St. Catherine of Alexandria[11] is late 19th-century from the workshop of C.E.Kempe and by Alfred E.Tombleson whose distinctive escutcheon shaped monogram is within.

[28] In 1913 John Peter 'Pitt' Hornung, an entrepreneur whose wealth came from sugar cane plantations in Portuguese East Africa[29] bought the West Grinstead Park estate from the Burrell family.

It depicts St.George, St.Stephen of Hungary and St.Elizabeth of Portugal with attendant angels and background scenes of a meet of the Crawley and Horsham Hunt at West Grinstead Park.

[18] The memorial window in the nave aisle by Florence and Walter Camm of Smethwick is beholden to the Arts and Craft movement and depicts the risen Christ with a kneeling figure of a soldier in Khaki flanked by eighteen angels and the four horsemen of the Apocalypse.

[35] The organ was originally installed for All Saints' Church, Hessle in Yorkshire[36] and was transported by train to West Grinstead in 1890 as part of the renovations then taking place at St.George's.

[35] It contains 150 pipes arranged in three ranks and by 1984 it required a major over-haul, carried out by Bishop & Son of London & Ipswich[37] who were able to source parts from contemporaneous redundant organs.

The communion plate includes a silver cup, standing paten and flagon by the leading Hanoverian goldsmiths Hugh Arnett and Edward Pocock and are dated between 1722 and 1730.