William Porter & Son, 21 High Street, Omagh, Co Tyrone, BT78 1BA is a Grade Record Only listed building in the Fermanagh and Omagh local planning authority area, Northern Ireland.

William Porter & Son, 21 High Street, Omagh, Co Tyrone, BT78 1BA

WRENN ID
seventh-cinder-hemlock
Grade
Record Only
Local Planning Authority
Fermanagh and Omagh
Constituency
West Tyrone MP: Órfhlaith Begley (SF)
Country
Northern Ireland
Address
William Porter & Son, 21 High Street, Omagh, Co Tyrone, BT78 1BA, BT78 1BA
Irish grid reference
H 450 726
Coordinates
54.59989, -7.30296
Source
NI Environment Agency listing

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

Description

This is an attached, two-bay, three-storey rendered townhouse built around 1930 on the south side of High Street in Omagh. It has a sensitive design that relates well to its neighbours. While locally significant, it is a late interpretation of an earlier style, and alterations, particularly to the front elevation at ground floor level, have diminished its original architectural and historical interest.

The building is arranged in an L-shape, facing north with a return to the rear. It has a pitched natural slate roof with angled blue/black clay ridge tiles, rendered chimneystacks topped with beaded terracotta chimneypots, and half-round metal gutters set within corbelled box eaves. The walls are finished with smooth painted render. The windows are square-headed, painted timber 8/1 sash windows with moulded rendered architraves and sills. Replacement glazed timber doors are square-headed. The north-facing principal elevation has a window in each bay; the first-floor windows have keyblocks. The ground floor has a modern fascia spanning a square-headed plate glass display window and door on the left bay, and a replacement door with overlight and moulded architrave with keyblock on the right bay. The east-facing gable abuts an adjoining building, with the exposed section blank. The rear (south-facing) elevation is abutted to the left by the return. The west-facing gable is entirely abutted by 19 High Street. The building sits prominently on an elevated site on Omagh High Street, close to the Courthouse and opposite the former town hall.

A building is shown on the site on early Ordnance Survey maps. A valuer’s records from 1933 indicate that the house was rebuilt in 1931, which is consistent with some of the building’s detailing. The 1933 valuer’s records show the occupier as Kathleen J Doris, a dental surgeon, and detail the layout as a kitchen, larder, reception room, three bedrooms, a bathroom, a WC, and a waiting room. The property also included a large return, a coal hole to the rear, and a shed. Valued at £32, the property was described as being in good order with modern fittings. The building is situated within the Omagh Conservation Area.

Local climate

William Porter & Son, 21 High Street, Omagh, Co Tyrone, BT78 1BA sits in a wetter-than-average part of the UK, with an average of 1,090 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 60% of listed buildings.

It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 15 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. No 19 High Street, Omagh, Co Tyrone, BT78 1BA, **See General Comments** Grade D1 Record Only 7 m
  2. Provincial House, 15 - 17 High Street, Omagh, Co. Tyrone, BT78 1BA Grade B1 20 m
  3. No’s 11 & 13, High Street, Omagh, Co Tyrone, BT78 1BA, **See General Comments** Grade D1 Record Only 29 m
  4. No’s 27, 29 & 31 High Street, Omagh, Co Tyrone, BT78 1BA Grade D1 Record Only 31 m
  5. Ulster Bank, 14 High Street, Omagh, Co. Tyrone, BT78 1BJ Grade B1 40 m
  6. Omagh District Council, Public Services Centre, 16 High Street, Omagh, Co. Tyrone, BT78 1BQ, ***See General Comments*** Grade Record Only 41 m
  7. Tyrone County Club, 10 High Street, Omagh, Co. Tyrone, BT78 1BQ Grade B+ 49 m
  8. First Trust Bank, 8 High Street, Omagh, Co. Tyrone, BT78 1BH Grade B2 57 m
  9. 4 John Street, Omagh, Co. Tyrone, BT78 1DW Grade Record Only 91 m
  10. Courthouse, High Street, Omagh, Co. Tyrone, BT78 1DU Grade B+ 99 m