The lime kiln is located near to the top of the foreshore, on the northeastern side of the inlet at Porthgain. It is marked 'LK' denoting lime kiln on the 1st edition 25" OS map published in 1889, but annotated as 'old lime kiln' on the 2nd edition 25" OS map published in 1907, indicating that it had fallen out of use by the latter date. It is built against the valley bank on its northeastern side and is abutted by the modern property to its east. A flight of steps has been built around the northwestern side of the kiln to provide access. The original loading ramp survives in the form of a single switchback, to the northwest of the steps, which is now a footpath.

The lime kiln is in a good overall condition, generally circular in form with opposed kiln-eyes, both intact, on its northwest and southeast sides. The kiln is 8.3m overall diameter and stands to a height of 4.2m at the western kiln-eye. The crucible has been mostly filled in, leaving only 0.75m extant in the top of the kiln. The surviving upper part of the crucible is irregular in shape, and c.3.5m in diameter. The northwestern kiln-eye is 2.3m wide, 2.9m deep, and 2.4m high at the lintel, which is made from a single piece of stone, 1.65m wide. The southeastern kiln-eye is overgrown with vegetation.

Sources Include:

Cadw Listed Building 12435: https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?lang=&id=12435

Ordnance Survey 25" Map, 1st Edition, 1889.

Ordnance Survey 25" Map, 2nd Edition, 1907.

RCAHMW Photogrammetry Survey, PGS2023_029, 06/07/2023. View here: https://skfb.ly/pxCCN

J. Whitewright, RCAHMW, May 2025.