Allt-y-fanog is a Grade II listed building in the Swansea local planning authority area, Wales. First listed on 17 July 1992. Cottage.

Allt-y-fanog

WRENN ID
fallen-window-wind
Grade
II
Local Planning Authority
Swansea
Constituency
Gower MP: Tonia Antoniazzi (Lab)
Country
Wales
Date first listed
17 July 1992
Type
Cottage
Address
Allt-y-fanog, Gellionnen, Mawr
OS grid reference
SN 695 038
Coordinates
51.71834, -3.88934
Source
Cadw listing

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

Description

Allt-y-fanog is a farmhouse constructed of rubble stone, with remnants of whitewash, a slate close-eaved roof, and rendered end stacks, although the uphill stack is largely collapsed. The building is situated on a steep slope and has a vernacular character, featuring an irregular front elevation of two storeys. It has a broad three-window range on the upper floor, with sashes that include a hornless 12-pane window to the left, a horned 4-pane window in the centre, and a former hornless 16-pane window to the right, which has fallen since the listing along with much of the wall face.

The ground floor has an off-centre entrance porch flanked by windows that have remnants of dripmoulds, with 6-pane casement glazing noted in 1992. The gabled rubble porch has a slate roof and a cambered arched entry, with the arch cut from a timber lintel and a boarded door within. The left end wall is windowless.

At the rear, there is a single-storey added outbuilding to the right with an end stack, followed by a shallow projection in the centre that has a slate roof and contains two staircases. To the left, there is a deep recess that framed a ground floor window with a loft door above, divided by a single lintel, which was partially collapsed in 2003. The uphill gable end has also partially collapsed, including much of the chimney.

The interior was inaccessible at the time of the survey. When it was listed in 1992, there was a stone flagged hall with beams featuring hollow stops with fillet to chamfers and an altered main fireplace. The outer room was formerly divided by a screen, as indicated by a slot in the ceiling beam. The window recesses were deep and splayed, especially in the outer room, with the wall cut back to the hall, reducing the wall thickness. Some 19th-century boarded doors were present. The two staircases had cross slab roofs and turned in the same direction within the single rear projection, although the left staircase was blocked.

Local climate

Allt-y-fanog sits in one of the wettest parts of the UK, with an average of 1,400 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.

It experiences an average of 21 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 8 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

Sign in or create a free account to unlock:

  • No EPC on record for this property
  • No sale records on file
  • No related consent applications matched
  • 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
Create free account

Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.

Similar buildings

The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.

Nearby listed buildings

  1. Capel Gellionnen (Gellionnen and Graig Unitarian Church) Grade II* 561 m
  2. Trebannws Multi-Overflow & Outlet Sluice from the Swansea Canal Grade II 2.0 km
  3. The Old Tollhouse Grade II 2.1 km
  4. Bridge over Lower Clydach below Glynmeithrim Uchaf Grade II 2.3 km
  5. Milestone on NE side of Vardre Road Grade II 2.3 km
  6. Statue of Sir Ludwig Mond Grade II 2.5 km
  7. Manor Park Country House Grade II 2.5 km
  8. Milestone on S side of High Street Grade II 2.5 km
  9. Upper Clydach Aqueduct and Overflow on Swansea Canal Grade II 2.5 km
  10. Church of Saint John the Baptist Grade II 2.5 km