St. Asaph Diocesan Office

The St. Asaph Diocesan Office is a Tudor-style, two-storey building featuring a crenellated gable end at the front. It is constructed of coursed rubble with freestone dressings. The first floor has a two-light window with pointed heads, adorned with Tudor hood moulds, while the entrance below is a four-centred arch with a pointed door. There is a plain stone tablet that may have originally contained an inscription. The slate roof has an undulating ridge and is complemented by brick and stone chimney stacks, along with stone bracketed eaves.

The left side of the building is finished in random coursed rubble and features a similar first-floor window. The ground floor entrance to the Cathedral museum is situated below churchyard level and is accessed through a cutting with a depressed arched roof. The rear gable end mirrors the front with a crenellated parapet and hood moulds, and it includes Gothick small pane sash windows, with metal barred Tudor windows below, partly below ground level.

To the right, there is a shorter parallel chapter room with a brick gable end, mostly in Flemish bond. This room has timber frame sash windows, with paired lights at the front and tripartite windows at the rear. A brick chimney breast is located at the right rear, featuring a very tall stack. A lean-to slate roof extends forward to the street, with a brick screen wall at the front, ashlar dressings, and a Tudor doorway.

Gothic railings adjacent to the chapter room outline the edge of the churchyard, which has a yard at the rear of the former Barber's shop below. Inside, the rectangular chapter room retains its cornice and panelled doors. The Diocesan Board of Finance Office features a groin vault with a central pier and retains some Gothick fittings, including panelled bookcases, along with a Victorian staircase.