Tirlaydan

88 registered freehold parcels lie mostly in Tirlaydan, from 27 m² to 590,979 m² (59.1 ha, 146.03 acres). The dashed line is the townland's boundary; 26 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 Tirlaydan 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.

• 15 Mar 2026Refused

  (1) DECONSTRUCTION OF EXISTING COMMERCIAL BUILDING AND REMOVAL FROM SITE, (2) CONSTRUCTION OF 10 NO. MODULAR HOLIDAY UNITS, (3) DECOMMISSIONING OF EXISTING SEPTIC TANK AND INSTALLATION OF A NEW ON-SITE SEWAGE TREATMENT SYSTEM AND (4) ALL ASSOCIATED SITE WORKS

  Permission · Donegal County Council, 2660420

• 23 Feb 2026N/a

  (1) DECONSTRUCTION OF EXISTING COMMERCIAL BUILDING AND REMOVAL FROM SITE, (2) CONSTRUCTION OF 10 NO. MODULAR HOLIDAY UNITS AND (3) DECOMMISSIONING OF EXISTING SEPTIC TANK AND INSTALLATION OF A NEW ON-SITE SEWAGE TREATMENT SYSTEM AND ALL ASSOCIATED SITE WORKS

  Permission · Donegal County Council, 2660262

• 23 May 2022Conditional

  (1) CONSTRUCTION OF A NEW DWELLING HOUSE, INSTALLATION OF A SEPTIC TANK SYSTEM (2) TEMPORARY PERMISSION FOR ERECTION OF A MOBILE HOME

  Permission, 1 home · Donegal County Council, 2250894

• 24 Aug 2020Unconditional

  CONSTRUCTION OF A DWELLING HOUSE, DETACHED DOMESTIC GARAGE, SEPTIC TANK/ SEWAGE TREATMENT SYSTEM AND ASSOCIATED SITE DEVELOPMENT WORKS

  Extension of duration · Donegal County Council, 2051149

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 Tirlaydan.

Recorded monuments

• DG028-001 Megalithic tomb - court tomb
  Description

  The monument stands on generally level, wet, boggy pasture close to the craggy lower slopes of Knockalla Mountain, which overlooks the site from the W. To the E is a view across low-lying land to Lough Swilly, 2km distant. The monument, greatly ruined, consists of the remains of a gallery, c. 6.5m long, preceded at the N by the remains of the W arm of a court. The structure stands in a largely grass-grown and somewhat ill-defined stony mound, not more than 0.5m high, measuring in overall extent 15m N-S by almost 14m E-W. A fence runs into the NW corner of the mound. Two probable courtstones remain. The eastern one is set transversely to the line of the gallery and seems to have also served as an entrance jamb. It is 0.8m high. It may originally have been taller, as the top seems broken. Two low stones lie E and W of each other immediately beside it at the S but cannot be relied on as original features. The eastern one measures 0.4m by 0.2m by 0.4m high, and the western one is 0.8m by 0.35m by 0.25m high. The other likely courtstone stands 0.8m to the W of the first. It leans northward and is 1.4m high. Approximately 2m S of the entrance jamb two orthostats of the W side of the gallery survive. The southern one leans inward and is 0.8m high. Its sloping outer face is well suited to bear corbels. The second stone here is flat-topped and 1.4m high. Opposite this is the only surviving stone of the E side of the gallery. It is 1m high. The top seems broken, so it may originally have been taller. The southern end of this stone and the stone opposite are 1.8m apart, but they converge on each other toward the N, where they are 1.2m apart. These stones may have served as segmenting jambs. If so, this would suggest that the gallery consisted of at least two chambers. A displaced slab, 1.5m by 0.6m, lies 1.5m to the E of the presumed entrance jamb. It is clear from an account of the monument in an OS Revision Name Book (1849-50) that it was then in its present condition. OS Revision Name Book, sheet 28 (1849-50), 4; Kinahan 1889, 279 (incorrectly assigned to Carrowreagh townland); Borlase 1897, 231, Kilmacrenan no. 7 (incorrectly assigned to Carrowreagh townland); Somerville 1909, 195-8, with plan (under 'Glenvar'); de Valera 1960, 106, DG. 10 (plan); Killanin and Duignan 1962, 408 (incorrectly assigned to Carrowveagh, recte Carrowreagh, townland); Killanin and Duignan 1967, 412 (incorrectly assigned to Carrowreagh townland); Ó Nualláin 1983a, 29, no. 45; SMR 1987, 28:1; Ó Nualláin 1989, 117; RMP 1995, 28:1. The above description was published in the 'Survey of the Megalithic Tombs of Ireland. Volume VI, County Donegal.' Compiled by: Eamon Cody (Dublin: Stationery Office, 2002). Date of upload: 22 September 2008 See linked document with details from Eamon Cody, Survey of the Megalithic Tombs of Ireland. Volume VI. County Donegal. (Dublin: Stationery Office, 2002)

Architectural heritage

• Saint Mary's Catholic Church, church/chapel, 1860–1865 · Regional interest
  Description

  Freestanding Catholic Church, built 1862, having four-bay nave, lower gabled chancel to east, porch to west and lean-to sacristy to northeast. Pitched purple slate roof with raised eaves course, rendered copings with kneeler stones and stucco cross finials, and cast-iron rainwater goods. Roughcast rendered walls with smooth rendered plinth and quoins. Pointed-arch windows openings, triple-light (c.1943) to chancel, with raised rendered surrounds, painted concrete sills and stained-glass windows inset with leaded quarries and having weather-glazing. Square-headed doorway to porch having timber battened double-leaf door with raised smooth render surround. Interior has exposed timber scissors truss roof with painted timber sheeted ceiling, drip-mould to chancel arch, and with moulded sill course to backdrop of sanctuary. Set at angle to road, with freestanding bell-stand having bronze bell on cast-iron columns atop stepped concrete plinth. Low rendered boundary wall and hedgerow to road. Graveyard on opposite side of road.

• Water pump, 1890–1910 · Regional interest
  Description

  Freestanding cast-iron water pump, erected c.1900, having banded cylindrical shaft with moulded neck, fluted cap with pointed finial, and cow's-tail handle. Set on concrete plinth on recent tarmacadam pathway, adjacent to recent rubble stone boundary wall to private dwelling.

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 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 Tirlaydan.

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 Tirlaydan with five sales or more. The sales of the area are on the page of Co. Donegal.

Name

Tirlaydan · Tír Leadáin

Area

1,896,880 m² (189.69 ha, 468.73 acres)

Civil parish

Clondavaddog, and its townlands

Barony

Kilmacrenan

Electoral division

Knockalla, the unit of the census

Census 2022

Knockalla electoral division: 286 people in 112 households; 84% of households own their home; 31% of homes were built since 2001; 19% of dwellings stood vacant on census night, and 25% were holiday homes.

Neighbouring townlands

Ballycallan, Carrowreagh, Drumfad, Lurganbrack, Meentaghmore

Gaeltacht

In an Irish-speaking area

Placenames

Tirlaydan 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.