Thornhill

171 registered freehold parcels lie mostly in Thornhill, from 141 m² to 138,897 m² (13.89 ha, 34.32 acres). The dashed line is the townland's boundary; 12 neighbouring parcels touch it.

Download the townland: DXF, in Irish Transverse Mercator metres, with its boundary, parcels and buildings; GeoJSON or KML.

No zone of a development plan covers Thornhill 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.

• 11 May 2026Conditional

  Planning permission to retain existing Domestic Shed and ancillary siteworks at Thornhill, Lecanvey, Westport, Co. Mayo Height of Domestic Shed: 4.81

  Retention · Mayo County Council, 2660364

• 5 Sept 2025Conditional

  The development will consist of the renovation and extension of existing dwelling house together with all ancillary site works.

  Permission · Mayo County Council, 2560608

• 1 Apr 2025Conditional

  construct a granny flat and upgrade existing septic tank system to install proprietary treatment unit, together with all site works and services

  Permission · Mayo County Council, 25121

• 24 Oct 2024Refused

  construct a Granny Flat and upgrade existing septic tank system, to install proprietary treatment unit, together with all site works and services

  Permission · Mayo County Council, 24453

• 14 Aug 2024N/a

  construct a granny flat and upgrade existing septic tank system to install proprietary treatment unit, together with all site works and services

  Permission · Mayo County Council, 24340

• 29 Jun 2023Conditional

  Planning Permission for the Construction of New Garage and all associated site work

  Permission · Mayo County Council, 2360251

• 22 May 2023Conditional

  carry out an attic conversion with alterations to front elevation, retention of existing garage and a new proposed Steeltech Shed along with all necessary site works and ancillaries

  Permission · Mayo County Council, 23286

• 23 Jan 2023Conditional

  The installation of approximately 15Km of 250mm OD water Trunk Main, which will extend from a position approximately 1Km from Westport at the junction of Pound Road and the R355 in the townland of Carrownalurgan to Kilsallagh Lower at the road junction between the R355 and the L1826 road to Drummin and the installation of approximately 29.3Km of a mains distribution network to supply water to 473 No Consumers along the route of the Trunk Main and in the area to the Townlands to the West of Croagh Patrick. All associated temporary site development works to gain access including clearance of vegetation, disassembly and reassembly of gate posts/ piers and removal and reinstatement of existing fencing, walls, and hedging; and any other temporary associated and ancillary development works required for the purposes of the proposed watermain, including the installation of stone tracks and temporary watercourse crossings. The watermain pipeline is located within the townlands of Cloghan, Clooneen, Knockfin, Ardoley, Churchfield, Knockaraha East, Knockaraha West, Streamstown, Belclare, Killadangan, Deerpark West, Murrisknaboll, Carrowkeeran, Bellataleen, Carrowkeel, Murrisk Demesne, Meermihil, Glaspatrick, Thornhill, Carrowmacloughlin, Leckanvy, Killsallagh Lower, Killsallagh Upper, Kinknock, Kilgeever, Cuilleen, Mullagh, Cartoor, Glenbaun, Glencally, Furgill, Cregganroe and Boheh in County Mayo.

  Permission, 1 home · Mayo County Council, 2360016

• 15 Dec 2022Refused

  Construct a private dwelling house, domestic garage, proprietary effluent treatment system and soil polishing filter together with all ancillary site works

  Permission · Mayo County Council, 221119

• 27 Jun 2022Refused

  CONSTRUCT A PRIVATE DWELLING HOUSE, DOMESTIC GARAGE, PROPRIETARY EFFLUENT TREATMENT SYSTEM AND SOIL POLISHING FILTER TOGETHER WITH ALL ANCILLARY SITE WORKS

  Permission · Mayo County Council, 22526

• 28 Jan 2022Conditional

  CONSTRUCT A NEW DWELLING HOUSE, DETACHED GRANNY FLAT AND PROPRIETARY TREATMENT UNIT, TOGETHER WITH ALL ANCILLARY SITE WORKS AND SERVICES

  Permission, 1 home · Mayo County Council, 2238

• 25 Nov 2021Conditional

  CONSTRUCT DWELLING HOUSE, PROPRIETARY EFFLUENT TREATMENT SYSTEM AND ALL ANCILLARY SITEWORKS ADN SERVICES

  Permission, 1 home · Mayo County Council, 211237

• 26 Oct 2021Conditional

  POLYTUNNEL STRUCTURE AND ALL ANCILLARY SITE WORKS AND SERVICES

  Permission · Mayo County Council, 211135

• 22 Jul 2021Conditional

  DEMOLISH EXISTING COTTAGE, CONSTRUCT NEW DWELLING HOUSE, DOMESTIC GARAGE, SEPTIC TANK AND PERCOLATION, NEW VEHICLE ACCESS AND ENTRANCE AND ALL ASSOCIATED SITE WORKS

  Permission, 1 home · Mayo County Council, 21785

• 12 Jul 2021Conditional

  CONSTRUCT A SINGLE STOREY EXTENSION (GRANNY FLAT) ATTACHED TO THE EXISTING BUILDING TOGETHER WITH ALL ANCILLARY SITE WORKS

  Permission, 1 home · Mayo County Council, 21743

• 4 Jun 2021Conditional

  CONSTRUCT A PRIVATE DWELLING HOUSE, PROPRIETARY EFFLUENT TREATMENT SYSTEM AND SOIL POLISHING FILTER TOGETHER WITH ALL ANCILLARY SITE WORKS

  Permission, 1 home · Mayo County Council, 21596

• 18 Mar 2021Conditional

  CONSTRUCT DWELLING HOUSE, DOMESTIC GARAGE, SEPTIC TANK AND PERCOLATION AREA AND ALL ANCILLARY SITEWORKS AND SERVICES

  Permission, 1 home · Mayo County Council, 21242

• 22 Oct 2020Conditional

  CONSTRUCT OUTBUILDING FOR USE ANCILLARY TO THE MAIN HOUSE, TOGETHER WITH ALL ANCILLARY SITEWORKS AND SERVICES

  Permission · Mayo County Council, 20788

• 13 Jul 2020N/a

  Permission for a dwelling house, domestic garage, septic tank and percolation area and all ancillary site works and services

  Permission · Mayo County Council, 20468

• 29 May 2018Conditional

  CONSTRUCT DWELLING HOUSE, DOMESTIC GARAGE, SEPTIC TANK AND PERCOLATION AREA TOGETHER WITH ALL ANCILLARY SITE WORKS

  Permission, 1 home · Mayo County Council, 18395

• 31 Mar 2017Conditional

  CONVERSION OF ATTIC SPACE TO LIVING ACCOMMODATION, EXTERNAL ALTERATIONS AND RETENTION OF RECESSED PORCH TO EXISTING HOUSE

  Permission · Mayo County Council, 17234

Source: National Planning Applications, Department of Housing, Local Government and Heritage, CC BY 4.0. Applicants are not shown.

Designated sites

• Special Area of Conservation: Clew Bay Complex SAC 001482
• Proposed Natural Heritage Area: Clew Bay Complex 001482

Recorded monuments

• MA087-011 Mound
  Description

  The Archaeological Survey of Ireland (ASI) is in the process of providing information on all monuments on The Historic Environment Viewer (HEV). Currently the information for this record has not been uploaded. To access available information for research purposes please make an appointment in advance with the Archive Unit (open Fridays 10.00 am – 5.00 pm), Department of Housing, Local Government and Heritage, The Custom House, Dublin 1 D01W6XO or email NMarchive@housing.gov.ie.

• MA087-011001 Enclosure
  Description

  The Archaeological Survey of Ireland (ASI) is in the process of providing information on all monuments on The Historic Environment Viewer (HEV). Currently the information for this record has not been uploaded. To access available information for research purposes please make an appointment in advance with the Archive Unit (open Fridays 10.00 am – 5.00 pm), Department of Housing, Local Government and Heritage, The Custom House, Dublin 1 D01W6XO or email NMarchive@housing.gov.ie.

Architectural heritage

• Saint Patrick's Catholic Church, church/chapel, 1890–1895 · Regional interest
  Description

  Detached seven-bay double-height Catholic church, dated 1891; extant 1897, comprising six-bay double-height nave opening into single-bay double-height chancel (south) with single-bay single-storey lean-to porches centred on single-bay full-height buttressed breakfront to entrance (north) front. Renovated, 1968, with sanctuary reordered. Replacement pitched slate roofs with lean-to slate roofs to porches, clay ridge tiles terminating in Cross finial to apex to entrance (north) front, and uPVC rainwater goods on eaves boards on concrete or rendered box eaves retaining cast-iron downpipes. Roughcast walls to entrance (north) front on dragged cut-limestone chamfered cushion course on rendered battered plinth; roughcast surface finish (remainder) bellcast over rendered plinth with rendered stepped buttresses having rendered coping. Lancet window openings with drag edged dragged cut-limestone surrounds having chamfered reveals framing storm glazing over fixed-pane fittings having stained glass margins centred on leaded stained glass quatrefoils. Paired lancet window openings to chancel (south) with octafoil "Rose Window" to gable, drag edged dragged cut-limestone surrounds having chamfered reveals framing storm glazing over fixed-pane fittings having leaded stained glass panels. Paired lancet window openings to entrance (north) front centred on cusped or trefoil-headed niche with drag edged dragged cut-limestone surrounds having chamfered reveals framing storm glazing over fixed-pane fittings having stained glass margins centred on square glazing bars. Square-headed door openings in pointed-arch recesses with drag edged dragged cut-limestone surrounds having chamfered reveals framing replacement fixed-pane fittings having square glazing bars. Interior including vestibule (west); square-headed door opening into nave remodelled, 1968, with replacement glazed timber double doors having sidelights below overlight; full-height interior open into roof with carpeted central aisle between trefoil-detailed timber pews, timber boarded or tongue-and-groove timber panelled wainscoting supporting timber dado rail, Gothic-style timber stations between stained glass memorial windows (undated), exposed split arch braced strutted collared timber roof construction on dragged cut-limestone corbels with wind braced timber boarded or tongue-and-groove timber panelled ceiling on carved timber cornice, and pointed-arch chancel arch framing carpeted stepped dais to sanctuary (south) reordered, 1968, with cut-veined white marble Gothic-style panelled altar below stained glass "East Window" (undated). Set in landscaped grounds on a corner site with limestone ashlar piers to perimeter having "Cavetto"-detailed pyramidal capping supporting wrought iron-detailed cast-iron double gates.

• T. Staunton, farm house, 1921–1943 · Regional interest
  Description

  Detached six-bay two-storey farmhouse, extant 1943, possibly originally two separate two-bay (north) or four-bay (south) two-storey houses with single-bay single-storey flat-roofed projecting porch to ground floor. Extensively renovated. Replacement pitched slate roof with clay ridge tiles, concrete or rendered coping to gables with rendered chimney stacks to apexes centred on rendered chimney stack having corbelled stepped stringcourses below capping supporting terracotta pots, and uPVC rainwater goods on eaves boards on rendered eaves. Replacement rendered walls. Square-headed window openings including one square-headed window opening in tripartite arrangement (ground floor) with concrete or rendered sills, timber mullions to tripartite opening, and concealed dressings framing replacement two-over-two timber sash windows having one-over-one sidelights to tripartite opening. Road fronted on a corner site with tarmacadam verge to front.

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).

Radon

About 1 in 10 homes in this area is likely to have high radon levels. Testing a home

Landslides

Susceptibility moderately high, moderately low, low, low (inferred), on the 1:50,000 map.

Terrain model

No LiDAR survey of the Office of Public Works covers the centre of the townland of Thornhill.

Flooding

The flood maps of the Office of Public Works: floodinfo.ie.

Radon Risk Map of Ireland, Environmental Protection Agency; Landslide Susceptibility Classification, Geological Survey Ireland; both 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.

No address of the register names Thornhill with five sales or more. The sales of the area are on the page of Co. Mayo.

Name

Thornhill · Cnoc Sceichín

Area

1,171,285 m² (117.13 ha, 289.43 acres)

Civil parish

Oughaval, and its townlands

Barony

Murrisk

Electoral division

Croaghpatrick, the unit of the census

Census 2022

Croaghpatrick electoral division: 699 people in 259 households; 81% of households own their home; 45% of homes were built since 2001; 10% of dwellings stood vacant on census night, and 24% were holiday homes.

Neighbouring townlands

Carrowmacloughlin, Glaspatrick, Leckanvy

Placenames

Thornhill 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.