Trihill West
Trihill West is a townland in the civil parish of Killeroran, barony of Killian, Co. Galway. Its name in Irish is Treachaill Thiar.
Parcel 4682065
- Area
- 25,015 m² (2.5 ha, 6.18 acres)
- Buildings
- 1 building touches it. Its footprint covers 30 m².
- Zoning
- No zone of a development plan covers it in the national zoning. Outside zoned towns and villages, the county development plan's rural policies apply.
- Townland
- Trihill West
Planning applications on this parcel
2 Oct 2025Conditional
for existing ground floor extension to rear of existing dwelling house, existing first floor extension to side of existing dwelling house, existing storage sheds planning permission for upgrading existing septic tank & soakpit to proposed proprietary treatment system & percolation area and associated works
Retention, 1 home · Galway County Council, 2561430
Source: National Planning Applications, Department of Housing, Local Government and Heritage, CC BY 4.0. Applicants are not shown.
Designated sites
No designated site (Special Area of Conservation, Special Protection Area, Natural Heritage Area or proposed one) touches this parcel.
Recorded monuments around it
No zone of notification of a recorded monument touches this parcel.
Architectural heritage
No building of the National Inventory of Architectural Heritage stands on this parcel.
Designated sites: National Parks and Wildlife Service. Recorded monuments: Sites and Monuments Record, National Monuments Service. Buildings: National Inventory of Architectural Heritage. Department of Housing, Local Government and Heritage, CC BY 4.0. Works at or in relation to a recorded monument need two months' written notice to the National Monuments Service (National Monuments (Amendment) Act 1994, section 12).
Ground and risks
- Radon
- At the centre of this parcel, about 1 in 5 homes in this area is likely to have high radon levels. Testing a home
- Landslides
- The 1:50,000 map rates the landslide susceptibility here as low.
- Terrain model
- No LiDAR survey of the Office of Public Works covers the centre of this parcel.
- Flooding
- The Office of Public Works publishes its flood maps on floodinfo.ie.
Radon Risk Map of Ireland, Environmental Protection Agency, and Landslide Susceptibility Classification, Geological Survey Ireland, both under CC BY 4.0. LiDAR: contains Irish Public Sector Data (Geological Survey Ireland & the Office of Public Works) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence.
Download this parcel as DXF, in Irish Transverse Mercator metres, with its neighbours and buildings, for a drawing program. GeoJSON, in WGS 84, suits a map, and KML opens in Google Earth.
Registered freehold land, Tailte Éireann, CC BY 4.0. A parcel is the land of a title, not an address. The owner's name is in the Land Registry of Tailte Éireann: a copy of the folio can be ordered on landdirect.ie, for a fee.
- Area
- 205.1 ha
- 507 acres
- Land parcels
- 166
- registered freehold, median 4,910 m² (0.49 ha, 1.21 acres)
- Zoning
- —
- not in a zoned settlement
- Planning
- 8
- applications since 2010
Land parcels
Registered freehold land, Tailte Éireann
166 registered freehold parcels lie mostly in Trihill West, from 138 m² to 86,211 m² (8.62 ha, 21.3 acres). The dashed line is the townland's boundary. 36 neighbouring parcels touch it.
Download the townland as DXF, in Irish Transverse Mercator metres, with its boundary, parcels and buildings, or as GeoJSON or KML.
Zoning
Development plans, national zoning
No zone of a development plan covers Trihill West in the national zoning. Outside zoned towns and villages, the county development plan's rural policies apply to each application.
Source: Tailte Éireann and the Department of Housing (MyPlan), national zoning, CC BY 4.0.
Planning applications
Sites that touch the townland, newest first
2 Oct 2025Conditional
for existing ground floor extension to rear of existing dwelling house, existing first floor extension to side of existing dwelling house, existing storage sheds planning permission for upgrading existing septic tank & soakpit to proposed proprietary treatment system & percolation area and associated works
Retention, 1 home · Galway County Council, 2561430
31 Jul 2025Conditional
for alterations to previously approved dwelling house permitted under planning reference number 23/61444
Permission, 1 home · Galway County Council, 2561053
4 Dec 2023Conditional
for construction of dwelling house, domestic garage/fuel store, bored well, proprietary treatment system, percolation area and associated works. Gross floor space of proposed works: 221.56 sqm
Permission, 1 home · Galway County Council, 2361444
4 Mar 2022Conditional
planning permission for alterations to dwelling house design previously approved under planning reference number 14/951 (Duration Extended under planning reference number 19/1684)
Permission, 1 home · Galway County Council, 2260186
30 Oct 2019Unconditional
for the construction of a dwellinghouse, domestic garage/fuel store, proprietary treatment system, percolation area and associated works (gross floor space 206.42sqm). Previous Planning Ref: 14/951
Extension of duration · Galway County Council, 191684
18 Jun 2019Conditional
to demolish an existing two storey rear extension and construct a new two storey rear extension, decommission existing septic tank and install an new replacement single dwelling treatment system with percolation area and all associated site works. Gross floor space of proposed works: Extension - 47.1 sqm. Gross floor space of any demolition: Extension - 31.32 sqm
Permission, 1 home · Galway County Council, 19917
14 May 2019N/a
to construct a new dwelling house, domestic / garage fuel store with wastewater treatment system, percolation area and all associated site works. Gross floor space of proposed works: 273.81 sqm (House - 214.31 sqm, Garage - 59.5 sqm)
Permission, 1 home · Galway County Council, 19715
6 Sept 2018Conditional
for the construction of a dwelling house, domestic garage/fuel store, proprietary treatment system, percolation area and associated works. Gross floor space of proposed works, dwelling, 186.41sqm and garage/shed, 55sqm.
Permission, 1 home · Galway County Council, 181268
Source: National Planning Applications, Department of Housing, Local Government and Heritage, CC BY 4.0. Applicants are not shown.
Nature and heritage
Designated sites and recorded monuments
Designated sites
- Special Protection Area: River Suck Callows SPA 004097
- Natural Heritage Area: Suck River Callows NHA 000222
Recorded monuments
No recorded monument lies in the townland of Trihill West.
Architectural heritage
- Bridge, 1930–1950 · Regional interest
Description
Five-span concrete road over water bridge, built c.1940. Flat concrete beams carrying carriageway, with square-plan rendered piers and open balustrade to parapet with decorative concrete balusters supporting chamfered concrete copings. Triangular cutwaters. Cement render to piers, chamfered pier caps, cement rendered walls to outer bays. Single tarmacadamed carriageway. Set in rural landscape with hedges to adjacent fields.
Designated sites: National Parks and Wildlife Service. Recorded monuments: Sites and Monuments Record, National Monuments Service. Buildings: National Inventory of Architectural Heritage. Department of Housing, Local Government and Heritage, CC BY 4.0. Works at or in relation to a recorded monument need two months' written notice to the National Monuments Service (National Monuments (Amendment) Act 1994, section 12).
Ground and risks
Radon, landslides, flooding
- Radon
- At the centre of the townland of Trihill West, about 1 in 5 homes in this area is likely to have high radon levels. Testing a home
- Landslides
- The 1:50,000 map rates the landslide susceptibility here as low, partly inferred.
- Terrain model
- No LiDAR survey of the Office of Public Works covers the centre of the townland of Trihill West.
- Flooding
- The Office of Public Works publishes its flood maps on floodinfo.ie.
Radon Risk Map of Ireland, Environmental Protection Agency, and Landslide Susceptibility Classification, Geological Survey Ireland, both under CC BY 4.0. LiDAR: contains Irish Public Sector Data (Geological Survey Ireland & the Office of Public Works) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence.
Homes sold
Property Price Register
No address of the register names Trihill West with five sales or more. The sales of the area are on the page of Co. Galway.
The townland
- Name
- Trihill West · Treachaill Thiar
- Area
- 2,051,332 m² (205.13 ha, 506.9 acres)
- Civil parish
- Killeroran, and its townlands
- Barony
- Killian
- Electoral division
- Castleffrench, the unit of the census
- Census 2022
- 522 people lived in 178 households in the Castleffrench electoral division. 92% of households owned their home. 30% of homes were built since 2001. 19% of dwellings stood vacant on census night, and 1% were holiday homes.
- Neighbouring townlands
- Ballinlass, Ballinvoher North, Curraghboy, Drinaun, Shanballymore, Trihill East
- Placenames
- Trihill West on logainm.ie, the Placenames Database of Ireland
Townlands, civil parishes, baronies and electoral divisions, National Statutory Boundaries, Tailte Éireann, CC BY 4.0. Census 2022, Small Area Population Statistics by electoral division, Central Statistics Office, CC BY 4.0. A townland is the smallest land division of Ireland, and the unit of a rural address. Old registers such as the 1901 and 1911 censuses file it under its civil parish and barony.