Tyn yr Heol is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 2 November 1993. House.

Tyn yr Heol

WRENN ID
gilded-niche-blackthorn
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
2 November 1993
Type
House
Address
Tyn yr Heol, Tonna
OS grid reference
SS 769 986
Coordinates
51.67266, -3.78139
Source
Cadw listing

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

Description

Tyn yr Heol is a symmetrical 5-bay house dating from the 20th century, featuring 2 storeys and an attic. The front is roughcast with quoins and a tall hipped roof, characteristic of its period, complete with bracketed eaves. Many slates are missing from the roof. The house has flush-set sash windows, all equipped with panelled shutters, though most have lost their glazing bars. A notable feature is the semicircular central timber porch, which dates from the early 20th century. This porch includes pilasters, a bracketed cornice, and small-pane glazing. The outer door is convex, while the inner door, adorned with reeded pilasters, is concave, creating a rounded lobby.

There are two slate-hung dormers with hipped roofs and 9-pane sashes. The left end wall has a single window and is attached to a 2-storey red brick extension with a flat roof and recessed, camber-headed sashes. The right end wall features a tall stair light and an attached flat-roofed 2-storey block at the rear, which includes a half-glazed door. The rear elevation showcases a gable-ended rubble cross range at the center, which is part of the original structure and is believed to have contained the hall, according to the Royal Commission on the Ancient and Historical Monuments of Wales (RCAHMW). To the right, there is a tall 2-storey range that runs parallel to the main block, complete with outside steps and similar sashes.

Although not accessible during the inspection, the RCAHMW describes the interior as having an ornate timber staircase accessed via a central stair-passage.

Local climate

Tyn yr Heol sits in one of the wettest parts of the UK, with an average of 1,380 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 96% of listed buildings.

It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 12 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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