15 Main Street, Limavady, Co Londonderry, BT49 OEP

15 Main Street is a three-storey, four-window-wide Georgian townhouse dating from circa 1840, part of a symmetrical terraced group of two with number 13 Main Street. The building faces north-west onto Main Street in Limavady.

The facade is rendered in sand cement, which detracts from its appearance within the terrace, and is topped with a natural slate roof. Brick chimneys sit on the party walls, with a larger chimney shared with the adjacent number 13. Georgian sash windows articulate the facade with careful proportioning: the ground floor and third floor windows are equal in height, each containing twelve panes, while the second floor windows are one pane taller and contain fifteen panes. The panelled entrance door is positioned to align with the second row of windows from the south-west and is surmounted by a rectangular fanlight divided into a brick joint pattern by fine astragals. Three stone steps rise from the street to the door. A light well protecting access to the basement runs across the front of the facade and is trimmed in stone with protective iron railings, with three basement windows visible. Windows feature sandstone cills and modern PVC rainwater goods.

To the rear, the window arrangement is less ordered, with windows positioned in line with the stair dropped to landing level and only three openings serving the third floor. A high brick courtyard wall, over two metres tall, encloses the rear of the property and terminates in a two-storey coach house in good repair. The coach house has a slate roof and brick walls with five openings of different sizes, all closed by solid matchboard doors. An entry way to the side reveals brick construction built upon a cut basalt plinth.

Ordnance Survey mapping shows a building on this site from 1831, though it is likely to have been a thatched structure dating from the second half of the eighteenth century. The 1835 Ordnance Survey memoirs note that only fifty years earlier there were "only a few cabins and indifferent houses" on Main Street. The present substantially built house replaced this earlier structure circa 1840. The arrangement of numbers 13 and 15 as much deeper properties than those to the south-west appears on the 1848 survey, which also shows the modern courtyard arrangement that is visible today.

The building is currently in office use, having formerly been residential. It is privately owned.