90 Heol Maengwyn is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 19 November 1990. Building. 2 related planning applications.

90 Heol Maengwyn

WRENN ID
rough-chimney-spring
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
19 November 1990
Type
Building
Address
90 Heol Maengwyn, Machynlleth, SY20 8EA
OS grid reference
SH 749 008
Coordinates
52.59067, -3.84701
Source
Cadw listing

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

Description

This building, located at 90 Heol Maengwyn, is a rubble structure with a slate roof, boarded eaves, and a stone chimney stack. The roof features skylights. The north gable, which faces the road, has ornate bargeboards adorned with pendants and a finial. A tall cross-frame window with small pane glazing is set within a Tudor label. Above this window, a rectangular panel has been removed, suggesting the building's earlier use as a chapel or school. The left side of the building is rubble, with a partially rendered section containing a blocked door and modern alterations. A modern extension has been added to the rear. The right-hand side has been altered and now abuts a builders' yard.

Local climate

90 Heol Maengwyn sits in one of the wettest parts of the UK, with an average of 1,280 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 38 freeze-thaw cycles a year, more than 73% of listed buildings. Of these, 20 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 1999
  • 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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  1. 94 Heol Maengwyn Grade II 14 m
  2. 96 Heol Maengwyn Grade II 16 m
  3. 98 Heol Maengwyn Grade II 19 m
  4. 100 Heol Maengwyn Grade II 23 m
  5. 102 Heol Maengwyn Grade II 26 m
  6. The Court House Grade II* 30 m
  7. Building to rear of Nos.104 & 106 Heol Maengwyn (now part of the Petrol, Station property Grade II 33 m
  8. The Court House Grade II* 40 m
  9. 115 Heol Maengwyn Grade II 40 m
  10. 113 Heol Maengwyn Grade II 45 m