Derry

114 registered freehold parcels lie mostly in Derry, from 40 m² to 5,369,673 m² (536.97 ha, 1,326.88 acres). The dashed line is the townland's boundary; 38 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 Derry 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.

• 28 Nov 2025Conditional

  retain existing general purpose shed

  Retention · Mayo County Council, 25486

• 15 Aug 2025Conditional

  Retention of changes to the approved elevations granted under application number 22/291 together with all ancillary site works at the above address.

  Retention · Mayo County Council, 2560559

• 26 Feb 2025Conditional

  the extension and renovation of an existing dwelling house, developing a home office building on the footprint of the existing hay shed and upgrade of wastewater treatment system and all associated site works at the above address

  Permission · Mayo County Council, 2560101

• 12 Apr 2022Conditional

  RETAIN AND RENOVATE AN EXISTING SPLIT LEVEL DWELLING HOUSE, CONSTRUCTION OF AN ATTACHED DOMESTIC GARAGE, PROPRIETARY SEWAGE TREATMENT SYSTEM AND ALL ASSOCIATED SITE WORKS

  Permission · Mayo County Council, 22291

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: Lough Carra/Mask Complex SAC 001774
• Special Protection Area: Lough Mask SPA 004062
• Proposed Natural Heritage Area: Maumtrasna Mountain Complex 000735
• Proposed Natural Heritage Area: Lough Carra/Mask Complex 001774

Recorded monuments

• MA116A001 Enclosure
  Description

  Located on a gentle S-facing slope in wet, boggy pasture. A stream skirts the S and W side of the enclosure. Not shown on the 1838 OS 6-inch map but indicated on the 1920 edition. Listed in the 1996 RMP on the basis of a rectangular enclosure visible in an aerial photograph (GSI M 186 -5; Roll 198, pr. 24). A field inspection in 1990’s determined it to be a field or garden plot of relatively recent date, consisting of a roughly square area (25m N-S; 23m E-W) defined by an embankment (H 0.3-0.6m). Compiled by: Jane O'Shaughnessy Date of upload: 14 July 2015

Architectural heritage

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

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 5 homes in this area is likely to have high radon levels. Testing a home

Landslides

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

Terrain model

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

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 Derry with five sales or more. The sales of the area are on the page of Co. Mayo.

Name

Derry · An Doire

Area

8,491,036 m² (849.1 ha, 2,098.18 acres)

Civil parish

Ballinchalla, and its townlands

Barony

Ross

Electoral division

Owenbrin, the unit of the census

Census 2022

Owenbrin electoral division: 213 people in 97 households; 85% of households own their home; 20% of homes were built since 2001; 20% of dwellings stood vacant on census night, and 28% were holiday homes.

Neighbouring townlands

Cappanacreha, Derrypark, Dirkbeg, Glennacally, Maumtrasna, Shanvallycahill

Gaeltacht

In an Irish-speaking area

Placenames

Derry 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.