Derryherk

92 registered freehold parcels lie mostly in Derryherk, from 282 m² to 179,167 m² (17.92 ha, 44.27 acres). The dashed line is the townland's boundary. 30 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.

No zone of a development plan covers Derryherk 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.

• 4 Sept 2026N/a

  Permission and Retention Permission for the completion of a single storey structure as built to date, part pitched with an attic/mezzanine and part flat roofed (total floor area 113.50 sq.m), built on the footprint of the original cottage and flat roof extension (total floor area 106 sq.m) now demolished following partial collapse during renovation works; and ancillary site development works at

  Retention · Roscommon County Council, 2660461

• 8 Apr 2026Conditional

  Permission for the decommissioning of an existing wastewater treatment unit and percolation area and the installation of a new sewerage treatment unit and percolation area, along with all other associated site works at

  Permission · Roscommon County Council, 2660156

• 30 May 2025Refused

  Retention Permission and Permission for the completion of a single storey structure as built to date, part pitched with an attic/mezzanine and part flat roofed (total floor area 113.50 sq.m), built on the footprint of the original cottage and flat roof extension (total floor area 106sq.m) now demolished following partial collapse during renovation works; and ancillary site development works at

  Retention · Roscommon County Council, 2560261

• 2 May 2025N/a

  Retention Permission for the completion of a single storey structure as built to date, part pitched with an attic/mezzanine and part flat roofed (total floor area 113.50 sq.m), built on the footprint of an existing cottage and flat roof extension (total floor area 106sq.m) that had been demolished, following partial collapse during renovation works; and ancillary site development works at

  Retention · Roscommon County Council, 2560195

• 24 Mar 2025N/a

  Retention permission for the retention of the demolition of the existing cottage and flat roof extension (total floor area: 106 sq.m.) that collapsed during renovation works; the completion of the re-building of the former cottage on the same footprint with an attic/mezzanine level and a new single storey extension to the rear (gross floor area of 113.50 sq.m.); and ancillary site development works at

  Retention · Roscommon County Council, 2560123

• 2 Jun 2023N/a

  Permission to construct a photographic studio and a utility store at

  Permission · Roscommon County Council, 23233

• 8 May 2023N/a

  Permission to construct a photographic studio and a utility store at

  Permission · Roscommon County Council, 23183

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 the townland of Derryherk.

Recorded monuments

No recorded monument lies in the townland of Derryherk.

Architectural heritage

No building of the National Inventory of Architectural Heritage stands in the townland of Derryherk.

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

At the centre of the townland of Derryherk, about 1 in 20 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 moderately high, moderately low, low, partly inferred.

Terrain model

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

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.

• Derryherk, Knockvicar5 sales

Name

Derryherk

Area

1,477,250 m² (147.73 ha, 365.04 acres)

Civil parish

Ardcarn, and its townlands

Barony

Boyle

Electoral division

Crossna, the unit of the census

Census 2022

209 people lived in 82 households in the Crossna electoral division. 87% of households owned their home. 32% of homes were built since 2001. 8% of dwellings stood vacant on census night, and 29% were holiday homes.

Neighbouring townlands

Cortrasna, Crooderry, Crossna, Derreenaseer, Derreenine, Fostragh, Woodfield

Placenames

Derryherk 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.