Thornhill, 14 Grannystown Road, Portglenone, Ballymena, Co.Antrim is a Grade B2 listed building in the Mid and East Antrim local planning authority area, Northern Ireland. First listed on 26 April 1991.

Thornhill, 14 Grannystown Road, Portglenone, Ballymena, Co.Antrim

WRENN ID
burning-cloister-raven
Grade
B2
Local Planning Authority
Mid and East Antrim
Constituency
North Antrim MP: Jim Allister (TUV)
Country
Northern Ireland
Date first listed
26 April 1991
Irish grid reference
C 983 071
Coordinates
54.90196, -6.4679
Source
NI Environment Agency listing

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

Local climate

Thornhill, 14 Grannystown Road, Portglenone, Ballymena, Co.Antrim 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 lower than that of 52% of listed buildings.

It experiences an average of 29 freeze-thaw cycles a year, fewer than 68% of listed buildings. Of these, 17 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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  • No EPC on record for this property
  • No sale records on file
  • No related consent applications matched
  • Detailed attributes — period, style, materials, features
  • No flood data for this area
  • 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. Gate Lodge 68 Main Street, Portglenone, Ballymena, Co Antrim, BT44 8HS Grade B2 3.4 km
  2. The Manor House, 69 Bridge Street, Kilrea, Coleraine, Co. Londonderry, BT51 5RR Grade B2 7.6 km
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  6. First Presbyterian Church, Kilrea, Coleraine, Co. Londonderry, BT51 5QU Grade B2 7.8 km
  7. Water tank at former station, 8 Drumagarner Rd, Kilrea, Coleraine, Co Londonderry, BT51 5TB 7.8 km
  8. 22 Bridge Street, Kilrea, Coleraine, Co. Londonderry, BT51 5QA 7.8 km
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