Trehenlliw is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 28 July 1992. Outbuilding. 2 related planning applications.
Trehenlliw
- WRENN ID
- carved-baluster-dust
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 28 July 1992
- Type
- Outbuilding
- Address
- Trehenlliw, St. David's and the Cathedral Close, SA62 6PH
- OS grid reference
- SM 758 264
- Coordinates
- 51.89108, -5.25918
- Source
- Cadw listing
Description
Trehenlliw is a two-storey building constructed of rubble stone with a grouted slate roof and stone end stacks. The main range features three windows and is accompanied by a lower two-storey service range to the left, which also has three windows. All windows are margin-glazed sashes with cambered yellow brick heads and slate sills. The main house has large sash windows and a round arched centre door with a plain overlight, which is set in an added glazed gabled porch. The lower range includes three small upper sashes, two larger ground floor sashes, and a central ledged door. The south end of the main house is rendered and displays a date plaque reading 'Trehenllew built by John Martin 1871'. The rear wall is also rendered and features two first floor sashes and a central pointed-headed stair-light.
Local climate
Trehenlliw sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 1 transaction since 2024
- Related listed building consents — 2 applications
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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