Roman Catholic Church of St Boniface, including the boundary wall with railings

Roman Catholic Church of St Boniface, opened in 1927 and designed by WC Mangan, including boundary wall and railings.

The church is constructed of sand-faced multi-coloured bricks from Daneshill, Basingstoke, laid to Flemish bond with brick and clay-tile detailing; some areas of brickwork have been replaced. Windows have leaded glazing and roofs are covered in pantiles.

The building is oriented on the cardinal points, running north-east to south-west from sanctuary to nave. The south-west end is flanked by apsidal projections, one incorporating the bell tower. The nave is flanked by three projecting side-chapel bays with paired projecting bays forming the transepts. An octagonal lantern rises above the crossing. A vestry is attached to the south-east and a polygonal sanctuary occupies the north-east end.

The exterior is built in neo-Byzantine style. The west porch features a large central recessed arch with a three-bay arcade of stone pillars topped by decorative capitals supporting arches with tile voussoirs. Above is a life-size stone sculpture of St Boniface, a 1954 replacement after the original oak statue disintegrated. Beyond the arcade is a double-leaf entrance door with a large semi-circular window in a brick and carved-stone arch above. Either side of the porch are brick pilasters with recessed windows topped by pyramidal roofs. The porch is crowned by a pediment with tympanum filled with decorative brickwork and corbelling. Curved side entrances with double-doors and arches containing cruciform motifs flank the pilasters. The west front's apsidal projections include a bell tower with a square base containing a blind niche and windows above; the upper section becomes octagonal with oblong tile-grate openings, topped by a two-tiered roof and metal cross finial.

Along the side elevations, gable ends to the projecting bays and transepts have pantile coping, round-headed windows and tile bands. Stepped corbels appear at the bay returns and along the nave sides. Between the side bays are lean-to nave aisles with small round-headed windows.

The octagonal lantern above the crossing is lit by oculi and topped by a two-tiered roof similar to the bell tower, with a metal cross finial. The polygonal east end has two small round-arched windows and a metal cross finial on the roof. Attached to the south side of the east end is a brick ventilation shaft with steps and a door at its base leading to the basement boiler room.

A flat-roof vestry is attached to the south side of the church with two external entrances and several round-headed windows.

Internally, beyond the west porch is the narthex accessed through main doors and modern internal glass doors. The side entrances include a small mouse carving on the inner face, a signature of joiner Robert Thompson. The narthex has a tiled floor, cupboards, a small shop in the former baptistery, and a stairway leading to the bell tower and raked gallery. Below the gallery is a timber and glass screen with doors leading into the nave. The nave ceiling has barrel vaults interrupted by canted beams, punctuated by tall arches aligning with the side chapels and lower arches providing access to the aisles.

The crossing beneath the octagonal lantern has pairs of arches within larger blind arches providing access to the north and south transepts. Pillar capitals and cornicing throughout the church have decorative details picked out in gilding. The sanctuary is decorated with marble and mosaic detailing executed by Marchetti Ltd of Portsmouth. A communion rail of black-marble posts linked by steel and brass railings stands before steps leading to the high altar, which was moved forward in 1969 and is supported by a pair of quatrefoil legs. Behind is a round-arched reredos with stepped arrangement of arches and the tabernacle set before a baldacchino over a crucifix. Steel and brass ambos and reading desks flank the sanctuary. Side chapels with altars, reredos and decorative floors lie either side. Within the south transept is a cylindrical marble and timber font, moved from the former baptistery in the narthex at an unknown date. Against one wall is a stained glass window in a timber light box, believed to come from the former tin church on Foundry Lane, installed to mark the centenary of the Roman Catholic parish's founding.

The church windows have simple stained glass designs. Original joinery is retained including pews, gallery rails with screen below, and doors with brass furniture. The main floor is oak block with Austrian oak entrance doors; remaining joinery is British-Columbian pine. An organ installed in the early 1930s was enlarged and moved to the gallery in 1975. The vestry beyond the south transept retains further original joinery with brass furniture and inbuilt cupboards.

On the north side of the church forecourt is a tiered brick wall with decorative brickwork and tile detailing; a symmetrical brick wall originally on the south side has been removed. Attached to the surviving wall is a set of metal railings decorated with small cruciform motifs and interrupted by brick piers.

The rear (east) section of the brick boundary wall is not included in the listing.