New Mill House is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 24 May 2000. House.
New Mill House
- WRENN ID
- tall-thatch-grain
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 24 May 2000
- Type
- House
- Address
- New Mill House, Coed-Y-Parc, Bethesda, Llandygai
- OS grid reference
- SH 615 664
- Coordinates
- 53.17718, -4.07334
- Source
- Cadw listing
Description
New Mill House is a 2-storey building with parallel gable-ended ranges that run at right angles to the road. It features a single-storey outbuilding attached to the south end of the west (front) range, along with another outbuilding positioned at right angles to the first, running parallel with the roadside wall. The structure is constructed from roughly coursed slate stone, with red brick window dressings on the ground floor and banded slate hanging on the upper level. The roofs are slate with overhanging verges and carved ends on the purlins and wall plates.
The main elevation on the west side has three segmental-headed 4-paned sash windows on the ground floor, and two gabled eaves dormers above, which contain sashes arranged in an unusual pattern of six panes over three tall rectangular panes. There is an integral end stack to the right with a panelled rectangular brick shaft, and a similar ridge stack to the left of centre. The entrance is located on the north side, which has been recently extended to the east in a style that matches the original house. The interior was not inspected at the time of the survey.
Local climate
New Mill House sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 follow 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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
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