Derrylahan

28 registered freehold parcels lie mostly in Derrylahan, from 603 m² to 292,416 m² (29.24 ha, 72.26 acres). The dashed line is the townland's boundary. 21 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 Derrylahan 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.

• 21 Nov 2025Grant with conditions

  Permission for construction of: 1) milking parlour building with collecting yard, meal bin, dairy, plant room, office, storage, two slatted tanks, 2) calf shed and all associated site works. Permission for retention of: 1) cubicle shed, 2) slatted feeding tank, 3) calf shed and all associated site works.

  Permission · Cork County Council, 25/6540

• 10 Sept 2025Invalid - case closed

  Permission for construction of 1) milking parlour building with collecting yard, meal bin, dairy, plant room, office, storage, two slatted tanks, 2) calf shed and all assocaited site works. Permission for retention of 1) cubicle shed, 2) slatted feeding tank, 3) calf shed and all assocaited site works

  Permission · Cork County Council, 25/5860

• 20 Oct 2021Conditional permission

  The construction of a vehicular entrance, dwelling house, septic tank and percolation together with all associated site works.

  Permission · Cork County Council, 21/6827

• 7 Jun 2019Conditional

  Construct a cubicle house with slatted tank, extension to cubicle house and ancillary works.

  Permission · Cork County Council, 19/5509

• 21 Dec 2018Conditional

  To construct dwelling, garage, entrance, proprietary waste water treatment system, entrance and all associated site works.

  Permission · Cork County Council, 18/7430

• 22 Apr 2013Conditional

  Construction of a two-storey dwelling, domestic garage, septic tank, percolation area and ancillary site works

  Permission · Cork County Council, 13/4735

• 5 Feb 2010Conditional

  Retention of extension to slatted livestock shed and associated site works

  Permission · Cork County Council, 10/4215

• 11 Nov 2009Incompleted application

  Retention of an extension to a slatted livestock shed & all associated site works

  Permission · Cork County Council, 09/7607

• 26 Jun 2007Conditional

  Demolition of existing pig unit and construction of slatted livestock shed, soiled water store and all associated site works

  Permission · Cork County Council, 07/9021

• 4 Dec 2006Conditional

  Construction of overground slurry tank, underground slatted tank, extension to silage slab, concrete apron to existing yard and dungstead

  Permission · Cork County Council, 06/12917

• 10 Aug 2004Conditional

  Dwellnghouse, garage and waste water treatment system

  Permission · Cork County Council, 04/6097

• 23 Mar 2004Incompleted application

  Dwellinghouse, domestic garage and installation of waste water treatment system

  Permission · Cork County Council, 04/1908

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 Derrylahan.

Recorded monuments

• CO010-007 Cist
  Description

  In flat pasture, on shoulder of gentle slope. Remains comprise subcircular raised area (diam. 8.5m N-S; 9m E-W) delimited by series of low, upright, kerb-like slabs (0.65m max. H). Inside W perimeter are apparent remains of cist with displaced roofstone (1.6m x 1.4m x 0.2m) resting on edge of sidestone (0.6m H; 0.6m x 0.2m). To N and within NE quadrant is arc of stones (0.5m max. H) set 1.6m-2m inside kerb and roughly parallel to it. South portion of site appears dug out. The above description is derived from the published 'Archaeological Inventory of County Cork. Volume 4: North Cork' (Dublin: Stationery Office, 2000). In certain instances the entries have been revised and updated in the light of recent research. Date of upload/revision: 14 January 2009

Architectural heritage

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

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 Derrylahan, 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 high, 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 Derrylahan.

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.

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

Name

Derrylahan · Doire Leathan

Area

1,350,400 m² (135.04 ha, 333.69 acres)

Civil parish

Marshalstown, and its townlands

Barony

Condons and Clangibbon

Electoral division

Ballyarthur, the unit of the census

Census 2022

325 people lived in 113 households in the Ballyarthur electoral division. 90% of households owned their home. 37% of homes were built since 2001. 7% of dwellings stood vacant on census night, and 3% were holiday homes.

Neighbouring townlands

Ballyarthur, Ballybrien (Co. Limerick), Coolnamohoge (Co. Limerick), Gorteenatarriff, Knockadea (Co. Limerick), Labbamolaga East, Lisnalanniv (Co. Limerick)

Placenames

Derrylahan 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.