Tyle-gwyn is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 31 March 1999. House. 3 related planning applications.

Tyle-gwyn

WRENN ID
mired-attic-barley
Grade
II
Local Planning Authority
Caerphilly
Constituency
Caerphilly MP: Chris Evans (Lab)
Country
Wales
Date first listed
31 March 1999
Type
House
Address
Tyle-gwyn, Wyllie, Pontllanfraith, NP12 2HQ
OS grid reference
ST 174 940
Coordinates
51.63919, -3.19485
Source
Cadw listing

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

Description

Tyle-gwyn is a roughly L-shaped house, now divided into two separate dwellings. It dates from the 18th century and is constructed of stone rubble, featuring a Welsh slate roof and corniced ridge stacks. The main range presents a symmetrical frontage, with a three-window arrangement of six-over-six pane sash windows. These windows have cambered voussoirs and shallow sills. Similar, deeper windows are found on the ground floor, flanking a central stable-style boarded door with a plain overlight. A projecting cross wing is on the left, displaying a gable end with an attic window in the apex. This section is two storeys high and contains a two-window range of larger sash windows, with rockfaced quoins. To the side of the main range, the windows have later brick surrounds. The rear elevation features three cambered-headed, horned sashes on the first floor, and smaller, similarly arched, altered casements on the ground floor. A high, rear external stack, showing offsets where the two dwellings join, is also evident. The right-hand end of the building shows a different construction, indicated by the awkward angle of the rear wall and the swept eaves.

Local climate

Tyle-gwyn sits in a wetter-than-average part of the UK, with an average of 1,060 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 13 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 2003
  • Related listed building consents — 3 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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Nearby listed buildings

  1. Stable range at Tyle-gwyn Grade II 21 m
  2. Heather Cottage Grade II 725 m
  3. Pair of chest tombs at Siloh Presbyterian Church Grade II 736 m
  4. Gelli-groes Millhouse and attached Barn Grade II 738 m
  5. Siloh Presbyterian Church Grade II 743 m
  6. Bridge over Sirhowy River at Gelligroes Grade II 756 m
  7. Gelli-groes Mill Grade II* 764 m
  8. Shangri La Grade II 1.2 km
  9. Stable block at Brynysgawen Grade II 1.4 km
  10. Caerllwyn Isaf and attached byre/stable Grade II 1.4 km