History in Structure

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Grisiau Mawr (steps between Pencei (Cornhill) and Ffordd Garth)

A Grade II Listed Building in Porthmadog, Gwynedd

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Latitude: 52.9234 / 52°55'24"N

Longitude: -4.1309 / 4°7'51"W

OS Eastings: 256841

OS Northings: 338344

OS Grid: SH568383

Mapcode National: GBR 5P.MYVB

Mapcode Global: WH55L.JS37

Entry Name: Grisiau Mawr (steps between Pencei (Cornhill) and Ffordd Garth)

Listing Date: 30 March 1951

Last Amended: 26 September 2005

Grade: II

Source: Cadw

Source ID: 4416

Building Class: Domestic

Location: On the W side of Cornhill, between Ty Toronto and No 7 Cornhill.

County: Gwynedd

Town: Porthmadog

Community: Porthmadog

Community: Porthmadog

Built-Up Area: Porthmadog

Traditional County: Caernarfonshire

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Probably built in the mid C19 to connect the harbour with new houses on Garth Road, which were built from the mid C19 onwards. The steps are indicated on the 1871 Tremadog estate plan and shown on the 1885 harbour survey.


Three steep contiguous flights of steps with renewed concrete treads over the original slate. The steps are between garden walls and end walls of the abutting buildings. Only at the bottom is there an iron handrail.

Reasons for Listing

Listed as a distinctive historical townscape feature for its contribution to the historical integrity of Porthmadog harbour.

Other nearby listed buildings

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