6 High Street, Moneymore, Magherafelt, Co Londonderry, BT45 7PD

6 High Street, Moneymore, is an early 19th-century Market House in Georgian style, completed in 1819 at a cost of £1,000. Designed by architect Jesse Gibson following instructions from a Deputation of 1818, it forms the centrepiece of an important architectural composition on High Street that includes the Draper's Arms to the south and a doctor's house and dispensary to the north.

The building is three bays wide and two storeys tall, with a basement and a distinctive roof clock tower. It features a pedimented breakfront with a surrounding parapeted wall and smooth rendered plinth, painted. The ground floor contains an arched gated doorway set in a concave reveal to the right, with two 12-pane double-hung sliding sash windows to the left. A moulded stringcourse runs the full width of the breakfront at the level of the doorway arch springing line. The first floor has three 15-pane double-hung sliding sash windows, taller than those below, set beneath a moulded pediment. Two metal downpipes flank the breakfront, draining trunkheads dated DC 1818, and drain the slated roof through the parapet wall. A stringcourse at first-floor level aligns with those of adjoining properties numbered 4 and 8.

The roof is of steep pitch leaded slates, with a low pitch behind the parapet wall. Centred on the ridge stands a tallish clock tower with an open belfry featuring pairs of arched openings on each face, circumscribed by a stringcourse. The tower is topped with a slated pyramid roof and weathervane cum aerial. The clock face is positioned on the east side only.

The rear wall, partly obscured by single-storey sheds, is of smooth rendered and unpainted finish. The ground floor contains three arched 14-pane double-hung sliding sash windows, while the first floor has two square-headed 15-pane double-hung sliding sash windows, the centre occupied by a chimney piece. The rear wall is finished with a solid parapet wall through which a chimney stack projects upwards. Two unpainted downpipes drain the rear elevation.

The joinery work was carried out in London so that it might serve as a model to local workmen. Originally designed as a Market House, the upper room functioned as an assembly room and newsroom from 1824. It later became a courtroom with a retiring room for the magistrate, retaining courtroom features to the present day. The large ground floor is now used by several community groups, including the Women's Institute.

The building remains in the ownership of the Drapers' Charity, which has employed various agents including J. Dunlop MP and the firm Dawson, Pentland and Kay. Early drawings showed a domed cupola with supporting columns, which was not realised in the executed design. The building was listed in 1975 and stands within a conservation area.