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Cof Cymru: National Historic Assets of Wales · Wales

Porth Mawr House

Crickhowell, Powys, Wales

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
19 July 1963
Town
Crickhowell
Community
Crickhowell
Unitary authority
Powys
Country
Wales
Coordinates
51.86035, -3.13774
Cadw reference
7157

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

At the junction of Brecon Road, High Street and New Road; enclosed behind medieval and later crenellated wall and reached by a short driveway N off New Road or through Porth Mawr gatehouse.

Regency mansion, said to have been completed by 1825. Built by the Seymour family following the pre-1810 fire damage to the C15 Cwrt-y-Carw.

U-plan with later additions. 2-storey stucco fronts, hipped slate roofs with wide swept bracket eaves and classical eaves band; brick and rendered chimney stacks. 5-window main front, with rusticated quoins to ground floor, faces NW across garden. Small-pane sash windows, with shutters to 1st floor. Advanced central half-glazed porch under overall lean-to verandah on paved terrace; trellised uprights (altered to base) and fan-traceried spandrels.

Rendered left side adjoins rear of gateway at right angles; small-pane sash windows to 1st floor and lower 2-storey extension with external staircase to 1st floor porch. 1-window right side with tripartite sash windows; 3-centred arch entrance with panelled reveals to pointed double doors.

Later extensions to rear and remains of former service buildings such as laundry.

Interior much altered through modern conversion into flats.

Group value.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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