Water Gauge House on Weir below Lake Vyrnwy Dam is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 26 February 2003. House. 2 related planning applications.

Water Gauge House on Weir below Lake Vyrnwy Dam

WRENN ID
sharp-finial-barley
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
26 February 2003
Type
House
Address
Water Gauge House on Weir below Lake Vyrnwy Dam, Llanwddyn, SY10 0LZ
OS grid reference
SJ 018 190
Coordinates
52.75992, -3.45541
Source
Cadw listing

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

Description

This is a timber-framed apparatus house, likely dating from the late 19th century, situated on a weir below Lake Vyrnwy Dam. The building measures approximately 2 metres by 3 metres and is characterised by a tile roof. The timber frame is painted brown with white panels. It features two-light mullion and transom windows on all four sides, along with a boarded door on the south face. The structure rests upon two courses of red plinth bricks and a base of rock-faced slate.

Local climate

Water Gauge House on Weir below Lake Vyrnwy Dam sits in a wetter-than-average part of the UK, with an average of 1,120 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.

It experiences an average of 55 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 34 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 — 4 transactions since 2017
  • 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
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