Number 70 Street Old Custom House

Number 70 Street, also known as the Old Custom House, is a custom house for the Port of Chester that has been converted into an office. It was rebuilt in 1868 and features Gothic Revival details. The building is constructed of stone-dressed Flemish bond brown brick and has a grey slate roof.

The exterior is two storeys high with three windows. It has a sandstone plinth and flush quoins. The door and window openings at the front are framed with stone surrounds that include quoins and hoodmoulds, all featuring relieving arches made of alternating red and yellow sandstone voussoirs. The replaced door on the right has an arched stone overlight with a quatrefoil design between two smaller ones, inscribed with "THE OLD CUSTOM HOUSE BLDG." The lower storey has two sash windows, each with one pane above two, and steeply-weathered sills. There is a moulded band at the first floor, which has three sash windows with one pane over two, featuring two superimposed sills, with the upper ones being recessed. The stone parapet is pierced with quatrefoils and has a raised centrepiece displaying the Royal arms in relief.

The west gable end is plain and features a brick chimney with a stone band and cap. It is now connected to the west end of the Guildhall, which was formerly Holy Trinity Church, by a screen wall. The east end is built against the tower of the Guildhall.

Inside, there is a patterned tiled floor in the entrance bay, and the stair has a narrow open well with a newel post and two turned balusters on each step. The entrance bay and stairwell have plaster cornices, and there are six-panel doors, most of which are now covered. There are two panels beneath the east front window on the second storey, and there is a modern extension at the rear.