Ty-Isa is a Grade II listed building in the Denbighshire local planning authority area, Wales. First listed on 22 December 1989. House.

Ty-Isa

WRENN ID
floating-foundation-elm
Grade
II
Local Planning Authority
Denbighshire
Constituency
Clwyd East MP: Becky Gittins (Lab)
Country
Wales
Date first listed
22 December 1989
Type
House
Address
Ty-Isa, Llangollen
OS grid reference
SJ 216 425
Coordinates
52.97452, -3.16891
Source
Cadw listing

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

Description

Ty-Isa is a single storey and attic building, likely dating from the late 17th century, constructed from whitewashed rubble. It was later divided into two cottages but is now a single property. The building features an undulating slate roof with overhanging eaves and rubble chimney stacks, which have red brick caps, located at the eastern end and near the entrance.

The southern side, originally the front, has tall gabled dormers with 4-pane casement windows, and below these are 6-pane casements with timber lintels. The eastern gable end includes a projecting chimney breast and a window above a modern door. The western end has a small pane casement window. The northern side, now facing the front, features an off-centre modern dormer above small pane windows, a boarded door located below the chimney stack, and a modern small-pane window to the far right.

The layout follows a lobby entry plan with service rooms to the west. Inside, there are deeply chamfered and stopped cross beams, a similar fireplace lintel, and stop-chamfered joists. The original roof structure remains, although modern stairs have been added.

Local climate

Ty-Isa receives an average of 920 mm of rain a year. This makes it wetter than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 73% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 28 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
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