19 Great Oak Street is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 10 April 1989. Detached house.

19 Great Oak Street

WRENN ID
eternal-postern-onyx
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
10 April 1989
Type
Detached house
Address
19 Great Oak Street, Llanidloes
OS grid reference
SN 955 844
Coordinates
52.44795, -3.53843
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

19 Great Oak Street is a mid-19th century building inspired by late Georgian architecture. It is a three-storey structure with a one-window front design arranged in reflected pairs. The front is finished in scribed cement render, featuring a plinth and quoins. The building has an overall slate roof with wide bracket eaves and blue brick chimney stacks. The windows are horned six-pane sash types, while most of the shop windows are four-pane with cornices. There are modern alterations to No 19. Alderson's, located between Nos 19 and 20, features a broader full-width shop front with a plate glass window and end pilasters beneath an overall cornice. The doors are part glazed, except for No 20.

No 17 extends around the corner into High Street, showcasing a similar scribed cement render elevation, horned six-pane sashes, and a modern small shop window. Nos 45 and 46 High Street are adjacent to the left, accessible through a round arched opening leading to the passage for the rear yard. This archway includes an architrave, keystone, and a boarded door. The right-hand gable end and rear elevations are slate hung and feature casement windows, along with a modern single-storey brick cross range. There is a tall brick stack at the rear of Nos 45 and 46, which includes some metal frame casement windows. The first and ground floors are made of rubble with a brick lean-to.

The cobbled yard is enclosed to the south and west by brick outbuilding ranges that have small pane metal frame windows with cambered heads. The western range connects to No 22 Great Oak Street.

Local climate

19 Great Oak Street sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 53 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 32 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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  • 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. 20 Great Oak Street Grade II 5 m
  2. 18 Great Oak Street Grade II 5 m
  3. Natural Foods Grade II 8 m
  4. 46 High St. (Great Oak St.) Grade II 10 m
  5. 21 Great Oak Street Grade II 11 m
  6. Telephone Call-box at corner of Great Oak Street Grade II 12 m
  7. 45 High St. (Great Oak Street) Grade II 14 m
  8. 22 Great Oak Street Grade II 15 m
  9. 23 Great Oak Street Grade II 18 m
  10. 44 High Street Grade II 19 m