# Derryherk, Co. Roscommon: townland, land parcels and planning

Townland in the civil parish of Ardcarn, barony of Boyle, Co. Roscommon.

- Area (Tailte Éireann): 1,477,250 m² (147.73 ha, 365.04 acres)
- Land parcels (Tailte Éireann): 92 registered freehold parcels lie mostly in it, median 6,779 m² (0.68 ha, 1.68 acres)
- Zoning (national zoning, MyPlan): not in a zoned settlement
- Planning (National Planning Applications): 8 applications since 2010
- Civil parish: Ardcarn, https://everytownland.com/roscommon/parish/ardcarn.md
- Barony: Boyle
- Electoral division: Crossna, the unit of the census
- Census 2022 (Central Statistics Office): 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.
- County: Co. Roscommon, https://everytownland.com/roscommon.md
- Placenames Database of Ireland: https://www.logainm.ie/en/42869
- Townland number at Tailte Éireann: 191039
- Centre: latitude 54.027084, longitude -8.184065 (WGS 84)

## Land parcels (registered freehold land, Tailte Éireann)

92 registered freehold parcels lie mostly in Derryherk, from 282 m² to 179,167 m² (17.92 ha, 44.27 acres); 30 neighbouring parcels touch its boundary. Largest first:

- Parcel 678223: 179,167 m² (17.92 ha, 44.27 acres), https://everytownland.com/parcel/678223.md
- Parcel 641352: 93,845 m² (9.38 ha, 23.19 acres), https://everytownland.com/parcel/641352.md
- Parcel 703416: 68,965 m² (6.9 ha, 17.04 acres), https://everytownland.com/parcel/703416.md
- Parcel 657829: 59,169 m² (5.92 ha, 14.62 acres), https://everytownland.com/parcel/657829.md
- Parcel 2501875: 58,329 m² (5.83 ha, 14.41 acres), https://everytownland.com/parcel/2501875.md
- Parcel 643457: 56,337 m² (5.63 ha, 13.92 acres), https://everytownland.com/parcel/643457.md
- Parcel 684832: 48,848 m² (4.88 ha, 12.07 acres), https://everytownland.com/parcel/684832.md
- Parcel 641353: 45,742 m² (4.57 ha, 11.3 acres), https://everytownland.com/parcel/641353.md
- Parcel 684746: 44,795 m² (4.48 ha, 11.07 acres), https://everytownland.com/parcel/684746.md
- Parcel 666955: 44,134 m² (4.41 ha, 10.91 acres), https://everytownland.com/parcel/666955.md
- Parcel 4995879: 41,999 m² (4.2 ha, 10.38 acres), https://everytownland.com/parcel/4995879.md
- Parcel 678120: 33,640 m² (3.36 ha, 8.31 acres), https://everytownland.com/parcel/678120.md
- Parcel 651545: 31,978 m² (3.2 ha, 7.9 acres), https://everytownland.com/parcel/651545.md
- Parcel 2820072: 30,751 m² (3.08 ha, 7.6 acres), https://everytownland.com/parcel/2820072.md
- Parcel 684749: 29,972 m² (3 ha, 7.41 acres), https://everytownland.com/parcel/684749.md
- Parcel 684732: 29,193 m² (2.92 ha, 7.21 acres), https://everytownland.com/parcel/684732.md
- Parcel 687645: 28,787 m² (2.88 ha, 7.11 acres), https://everytownland.com/parcel/687645.md
- Parcel 678130: 27,348 m² (2.73 ha, 6.76 acres), https://everytownland.com/parcel/678130.md
- Parcel 657141: 26,106 m² (2.61 ha, 6.45 acres), https://everytownland.com/parcel/657141.md
- Parcel 657695: 21,524 m² (2.15 ha, 5.32 acres), https://everytownland.com/parcel/657695.md
- Parcel 645509: 21,496 m² (2.15 ha, 5.31 acres), https://everytownland.com/parcel/645509.md
- Parcel 657444: 20,634 m² (2.06 ha, 5.1 acres), https://everytownland.com/parcel/657444.md
- Parcel 663810: 20,099 m² (2.01 ha, 4.97 acres), https://everytownland.com/parcel/663810.md
- Parcel 684835: 19,306 m² (1.93 ha, 4.77 acres), https://everytownland.com/parcel/684835.md
- Parcel 684744: 19,302 m² (1.93 ha, 4.77 acres), https://everytownland.com/parcel/684744.md
- Parcel 678137: 18,389 m² (1.84 ha, 4.54 acres), https://everytownland.com/parcel/678137.md
- Parcel 663145: 18,341 m² (1.83 ha, 4.53 acres), https://everytownland.com/parcel/663145.md
- Parcel 706701: 17,642 m² (1.76 ha, 4.36 acres), https://everytownland.com/parcel/706701.md
- Parcel 704203: 15,478 m² (1.55 ha, 3.82 acres), https://everytownland.com/parcel/704203.md
- Parcel 720758: 13,682 m² (1.37 ha, 3.38 acres), https://everytownland.com/parcel/720758.md
- Parcel 705942: 13,129 m² (1.31 ha, 3.24 acres), https://everytownland.com/parcel/705942.md
- Parcel 684833: 12,781 m² (1.28 ha, 3.16 acres), https://everytownland.com/parcel/684833.md
- Parcel 661590: 12,301 m² (1.23 ha, 3.04 acres), https://everytownland.com/parcel/661590.md
- Parcel 5143065: 11,971 m² (1.2 ha, 2.96 acres), https://everytownland.com/parcel/5143065.md
- Parcel 693176: 11,899 m² (1.19 ha, 2.94 acres), https://everytownland.com/parcel/693176.md
- Parcel 694618: 11,603 m² (1.16 ha, 2.87 acres), https://everytownland.com/parcel/694618.md
- Parcel 678136: 10,919 m² (1.09 ha, 2.7 acres), https://everytownland.com/parcel/678136.md
- Parcel 2946127: 9,556 m² (0.96 ha, 2.36 acres), https://everytownland.com/parcel/2946127.md
- Parcel 708489: 9,302 m² (0.93 ha, 2.3 acres), https://everytownland.com/parcel/708489.md
- Parcel 678145: 9,158 m² (0.92 ha, 2.26 acres), https://everytownland.com/parcel/678145.md
- Parcel 678119: 8,994 m² (0.9 ha, 2.22 acres), https://everytownland.com/parcel/678119.md
- Parcel 675139: 8,886 m² (0.89 ha, 2.2 acres), https://everytownland.com/parcel/675139.md
- Parcel 678121: 7,856 m² (0.79 ha, 1.94 acres), https://everytownland.com/parcel/678121.md
- Parcel 659861: 7,157 m² (0.72 ha, 1.77 acres), https://everytownland.com/parcel/659861.md
- Parcel 678142: 7,151 m² (0.72 ha, 1.77 acres), https://everytownland.com/parcel/678142.md
- Parcel 684752: 6,969 m² (0.7 ha, 1.72 acres), https://everytownland.com/parcel/684752.md
- Parcel 678141: 6,589 m² (0.66 ha, 1.63 acres), https://everytownland.com/parcel/678141.md
- Parcel 684730: 6,163 m² (0.62 ha, 1.52 acres), https://everytownland.com/parcel/684730.md
- Parcel 703637: 5,957 m² (0.6 ha, 1.47 acres), https://everytownland.com/parcel/703637.md
- Parcel 669373: 5,695 m² (0.57 ha, 1.41 acres), https://everytownland.com/parcel/669373.md
- Parcel 678128: 5,437 m² (0.54 ha, 1.34 acres), https://everytownland.com/parcel/678128.md
- Parcel 707077: 5,314 m² (0.53 ha, 1.31 acres), https://everytownland.com/parcel/707077.md
- Parcel 678150: 5,046 m² (0.5 ha, 1.25 acres), https://everytownland.com/parcel/678150.md
- Parcel 684839: 4,926 m² (0.49 ha, 1.22 acres), https://everytownland.com/parcel/684839.md
- Parcel 2946608: 4,622 m² (0.46 ha, 1.14 acres), https://everytownland.com/parcel/2946608.md
- Parcel 719085: 4,505 m² (0.45 ha, 1.11 acres), https://everytownland.com/parcel/719085.md
- Parcel 676388: 4,160 m² (0.42 ha, 1.03 acres), https://everytownland.com/parcel/676388.md
- Parcel 2946727: 4,074 m² (0.41 ha, 1.01 acres), https://everytownland.com/parcel/2946727.md
- Parcel 698102: 3,902 m² (0.39 ha, 0.96 acres), https://everytownland.com/parcel/698102.md
- Parcel 684840: 3,870 m² (0.39 ha, 0.96 acres), https://everytownland.com/parcel/684840.md
- Parcel 661906: 3,648 m² (0.36 ha, 0.9 acres), https://everytownland.com/parcel/661906.md
- Parcel 707295: 3,644 m² (0.36 ha, 0.9 acres), https://everytownland.com/parcel/707295.md
- Parcel 2946487: 3,443 m² (0.34 ha, 0.85 acres), https://everytownland.com/parcel/2946487.md
- Parcel 678131: 3,060 m² (0.31 ha, 0.76 acres), https://everytownland.com/parcel/678131.md
- Parcel 678113: 3,046 m² (0.3 ha, 0.75 acres), https://everytownland.com/parcel/678113.md
- Parcel 684741: 3,037 m² (0.3 ha, 0.75 acres), https://everytownland.com/parcel/684741.md
- Parcel 2922701: 2,759 m² (0.28 ha, 0.68 acres), https://everytownland.com/parcel/2922701.md
- Parcel 656692: 2,613 m² (0.26 ha, 0.65 acres), https://everytownland.com/parcel/656692.md
- Parcel 678140: 2,410 m² (0.24 ha, 0.6 acres), https://everytownland.com/parcel/678140.md
- Parcel 678125: 2,260 m² (0.23 ha, 0.56 acres), https://everytownland.com/parcel/678125.md
- Parcel 2490710: 2,244 m² (0.22 ha, 0.55 acres), https://everytownland.com/parcel/2490710.md
- Parcel 719476: 2,205 m² (0.22 ha, 0.54 acres), https://everytownland.com/parcel/719476.md
- Parcel 675246: 2,196 m² (0.22 ha, 0.54 acres), https://everytownland.com/parcel/675246.md
- Parcel 678122: 2,011 m² (0.2 ha, 0.5 acres), https://everytownland.com/parcel/678122.md
- Parcel 684747: 1,990 m², https://everytownland.com/parcel/684747.md
- Parcel 678127: 1,706 m², https://everytownland.com/parcel/678127.md
- Parcel 659413: 1,626 m², https://everytownland.com/parcel/659413.md
- Parcel 643458: 1,585 m², https://everytownland.com/parcel/643458.md
- Parcel 678132: 1,535 m², https://everytownland.com/parcel/678132.md
- Parcel 720866: 1,461 m², https://everytownland.com/parcel/720866.md
- Parcel 700144: 1,443 m², https://everytownland.com/parcel/700144.md
- Parcel 684836: 1,360 m², https://everytownland.com/parcel/684836.md
- Parcel 678126: 1,252 m², https://everytownland.com/parcel/678126.md
- Parcel 684829: 1,245 m², https://everytownland.com/parcel/684829.md
- Parcel 665848: 1,245 m², https://everytownland.com/parcel/665848.md
- Parcel 684740: 1,220 m², https://everytownland.com/parcel/684740.md
- Parcel 678116: 1,157 m², https://everytownland.com/parcel/678116.md
- Parcel 658310: 1,105 m², https://everytownland.com/parcel/658310.md
- Parcel 697127: 1,002 m², https://everytownland.com/parcel/697127.md
- Parcel 641658: 940 m², https://everytownland.com/parcel/641658.md
- Parcel 702852: 738 m², https://everytownland.com/parcel/702852.md
- Parcel 2501873: 282 m², https://everytownland.com/parcel/2501873.md

## Zoning (national zoning of development plans, MyPlan)

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.

## Planning applications whose site touches the townland (National Planning Applications, Department of Housing, Local Government and Heritage)

8 applications, newest first.

- 18 Sept 2026, Roscommon County Council 2660488: N/a. Permission. Proposed Replacement Of Existing Septic Tank System With An Onsite Wastewater Sewerage System In Accordance With The EPA Code Of Practice 2021 And All Ancillary Site Works. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2660488/0
- 4 Sept 2026, Roscommon County Council 2660461: N/a. Retention. 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. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2660461/0
- 8 Apr 2026, Roscommon County Council 2660156: Conditional. Permission. 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. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2660156/0
- 30 May 2025, Roscommon County Council 2560261: Refused. Retention. 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. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2560261/0
- 2 May 2025, Roscommon County Council 2560195: N/a. Retention. 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. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2560195/0
- 24 Mar 2025, Roscommon County Council 2560123: N/a. Retention. 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. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/2560123/0
- 2 Jun 2023, Roscommon County Council 23233: N/a. Permission. Permission to construct a photographic studio and a utility store at. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/23233/0
- 8 May 2023, Roscommon County Council 23183: N/a. Permission. Permission to construct a photographic studio and a utility store at. File: https://www.eplanning.ie/RoscommonCC/AppFileRefDetails/23183/0

Applicants are not shown.

## Designated sites (National Parks and Wildlife Service)

No designated site (Special Area of Conservation, Special Protection Area, Natural Heritage Area or proposed one) touches the townland of Derryherk.

## Recorded monuments (Sites and Monuments Record, National Monuments Service)

No recorded monument lies in the townland of Derryherk.

## Architectural heritage (National Inventory of Architectural Heritage)

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

## Ground and risks (Radon Risk Map of Ireland, EPA; Landslide Susceptibility Classification and LiDAR, Geological Survey Ireland)

- 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: https://www.epa.ie/environment-and-you/radon/radon-testing/#d.en.82887
- 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 flood maps of the Office of Public Works, https://www.floodinfo.ie/map/floodmaps/, linked only: their licence does not allow re-use.

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.

## Downloads

- DXF, in Irish Transverse Mercator metres, with its boundary, parcels and buildings, for a drawing program: https://everytownland.com/roscommon/derryherk.dxf
- GeoJSON, in WGS 84, for a map: https://everytownland.com/roscommon/derryherk.geojson
- KML, for Google Earth: https://everytownland.com/roscommon/derryherk.kml

## Homes sold (Residential Property Price Register)

- Derryherk, Knockvicar: 5 sales, https://everytownland.com/roscommon/derryherk-knockvicar.md

## Neighbouring townlands (National Statutory Boundaries, Tailte Éireann)

- Cortrasna: https://everytownland.com/roscommon/cortrasna.md
- Crooderry: https://everytownland.com/roscommon/crooderry.md
- Crossna: https://everytownland.com/roscommon/crossna.md
- Derreenaseer: https://everytownland.com/roscommon/derreenaseer.md
- Derreenine: https://everytownland.com/roscommon/derreenine.md
- Fostragh: https://everytownland.com/roscommon/fostragh.md
- Woodfield: https://everytownland.com/roscommon/woodfield.md

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.

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Everytownland reads the registered freehold land and the statutory boundaries of Tailte Éireann, the national zoning, planning file and heritage records of the Department of Housing, Local Government and Heritage, and the Residential Property Price Register. 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; this site names no owner. A price is the price recorded for a past sale, not a valuation.

Sources: Cadastral Parcels Freehold, Townlands, Civil Parishes, Baronies, Electoral Divisions and Buildings, Tailte Éireann, CC BY 4.0; national zoning of development plans (GZT, MyPlan) and National Planning Applications, Department of Housing, Local Government and Heritage, CC BY 4.0, applicants not shown; designated sites, National Parks and Wildlife Service, CC BY 4.0; Sites and Monuments Record, National Monuments Service, CC BY 4.0; National Inventory of Architectural Heritage, CC BY 4.0; Residential Property Price Register, Property Services Regulatory Authority, re-used with the source acknowledged.

- Page: https://everytownland.com/roscommon/derryherk
- In JSON: https://everytownland.com/api/townland/roscommon/derryherk