25 Tan y Bwlch is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 24 May 2000. Cottage. 1 related planning application.

25 Tan y Bwlch

WRENN ID
weathered-crypt-swift
Grade
II
Local Planning Authority
Gwynedd
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
24 May 2000
Type
Cottage
Address
25 Tan y Bwlch, Mynydd Llandygai, Llandygai, LL57 4DX
OS grid reference
SH 602 652
Coordinates
53.16634, -4.09237
Source
Cadw listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

These are a pair of quarryman’s cottages built in the 18th century, aligned north-west to south-east. Each cottage has a single-storey, two-room plan with a loft space. They are constructed from roughly coursed and dressed rubblestone, with the gable ends rendered and painted. The roofs are slate-covered. Each cottage has three-light windows with slate sills, placed on either side of a slightly offset entrance. Integral end stacks and a shared ridge stack are located centrally between the two cottages. There are also windows in the gable ends, illuminating the lofts and catslide lean-tos at the rear of the buildings. These cottages belong to a group of two. They have been altered to the front, now featuring a roughcast finish, a flat-roofed porch on the right, two 20th-century windows on the left, a 20th-century rooflight on the right, and a removed integral end stack. The interior was not inspected.

Local climate

25 Tan y Bwlch 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 3 transactions since 2008
  • Related listed building consents — 1 application
  • 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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Nearby listed buildings

  1. Outbuildings to No.24 Grade II 31 m
  2. 24 Tan y Bwlch Grade II 44 m
  3. Boundary Walls/Slate Fencing to Nos.24 & 25 Grade II 46 m
  4. Privies to Nos.23 & 24 Grade II 315 m
  5. 23 Llwybr Main Grade II 321 m
  6. 24 Llwybr Main Grade II 322 m
  7. Boundary Walls/Slate Fencing to Nos.23 & 24 Grade II 336 m
  8. 4 Tan y Bwlch Grade II 461 m
  9. 3 Tan y Bwlch Grade II 469 m
  10. Boundary Walls/Slate Fencing to Nos.3 & 4 Grade II 484 m