Thomastown

721 registered freehold parcels lie mostly in Thomastown, from 2 m² to 33,039 m² (3.3 ha, 8.16 acres). The dashed line is the townland's boundary; 59 neighbouring parcels touch it.

Download the townland: DXF, in Irish Transverse Mercator metres, with its boundary, parcels and buildings; GeoJSON or KML.

• R2Objective A (Existing residential)
  COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 731 parcels The zoning objective in the plan
• M3Objective NC (District, neighbourhood centre)
  COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 15 parcels The zoning objective in the plan
• G1Objective F (Open space, park)
  COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 10 parcels The zoning objective in the plan
• C2.1Objective E (Industrial, enterprise, employment)
  COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 5 parcels The zoning objective in the plan
• S5Objective SNI (Mixed/general community services/facilities uses)
  COUNTY DEVELOPMENT PLAN 2022-2028, Dun Laoghaire-Rathdown · 1 parcels The zoning objective in the plan

Source: Tailte Éireann and the Department of Housing (MyPlan), national zoning, CC BY 4.0.

• 9 Jul 2026Grant permission

  Planning Permission for, A. Attic conversion incorporating dormer extension to

  Permission · Dun Laoghaire Rathdown County Council, D26A/0520

• 30 Jun 2026Grant permission

  The proposed development will consist of: •Demolition of existing timber storage

  Permission · Dun Laoghaire Rathdown County Council, D26B/0377/WEB

• 12 Jun 2026Grant permission

  Beer, Wine, Spirits, Retail Off Licence subsidiary to main retail use.

  Permission · Dun Laoghaire Rathdown County Council, D26A/0444/WEB

• 9 Jun 2026Grant permission for retention

  Retention of a single storey extension consisting of: (1). 6.17 sq.m. Storage ar

  Permission for retention · Dun Laoghaire Rathdown County Council, D26B/0336/WEB

• 5 Jun 2026Grant permission

  Randalswood Construction Limited intend to apply for permission for a Large-Scal

  Permission · Dun Laoghaire Rathdown County Council, LRD26A/0418/WEB

• 4 Jun 2026Declare application invalid

  Retention of a single storey extension consisting of: (1). 6.17 sq.m. Storage ar

  Permission for retention · Dun Laoghaire Rathdown County Council, D26B/0328/WEB

• 22 May 2026Registered application

  73 mobility hub sites across the Council's administrative area

  Part vlll (public consultation) · Dun Laoghaire Rathdown County Council, PC/IC/01/26

• 22 May 2026Declare application invalid

  Retention of a single storey extension consisting of: (1). 6.17 sq.m. Storage ar

  Permission for retention · Dun Laoghaire Rathdown County Council, D26B/0302/WEB

• 20 Apr 2026Grant permission

  The development will consist of the conversion of the existing attic to storage

  Permission · Dun Laoghaire Rathdown County Council, D26B/0233/WEB

• 3 Apr 2026Grant permission

  Planning permission for attic conversion with roof windows to front and rear ro

  Permission · Dun Laoghaire Rathdown County Council, D26B/0197/WEB

• 23 Mar 2026Grant permission

  Proposed Front single storey extension with associated site development works to

  Permission · Dun Laoghaire Rathdown County Council, D26B/0166

• 23 Mar 2026Grant permission & grant retention

  The development will consist of the Retention of works carried out to date which

  Permission for retention · Dun Laoghaire Rathdown County Council, D26A/0218/WEB

• 20 Mar 2026Grant permission

  Attic conversion for storage with dormer and Velux window to the front, and new

  Permission · Dun Laoghaire Rathdown County Council, D26A/0213/WEB

• 23 Feb 2026Grant permission

  Planning permission is being sought for a proposed two storey dwelling house con

  Permission · Dun Laoghaire Rathdown County Council, D26A/0123/WEB

• 18 Feb 2026Declare application invalid

  Planning permission is being sought for a proposed two storey dwelling house con

  Permission · Dun Laoghaire Rathdown County Council, D26A/0110/WEB

• 30 Jan 2026Declare invalid (site notice)

  Proposed Front single Storey Extension with associated site development works to

  Permission · Dun Laoghaire Rathdown County Council, D26B/0058

• 29 Jan 2026Grant permission

  a) A two-storey extension to the side incorporating a single storey porch exten

  Permission · Dun Laoghaire Rathdown County Council, D26A/0048/WEB

• 26 Jan 2026Grant permission

  Conversion of existing attic space comprising of modification of existing roof

  Permission · Dun Laoghaire Rathdown County Council, D26B/0038/WEB

• 22 Dec 2025Grant certificate of exemption

  1 Unit

  Certificate of exemption - part v · Dun Laoghaire Rathdown County Council, V/096/25

• 22 Dec 2025Grant permission

  The subdivision of the existing site to include the removal of existing garden

  Permission · Dun Laoghaire Rathdown County Council, D25A/0997/WEB

• 25 Nov 2025Declare application invalid

  A new vehicular access onto Rochestown Avenue. Removal of existing shed/worksho

  Permission · Dun Laoghaire Rathdown County Council, D25A/0902

• 13 Nov 2025Declare invalid (site notice)

  Proposed front single storey extension with associated site development works to

  Permission · Dun Laoghaire Rathdown County Council, D25B/0638

• 11 Nov 2025Declare application invalid

  Planning Permission sought for a new vehicular access onto Rochestown Avenue. R

  Permission · Dun Laoghaire Rathdown County Council, D25A/0858

• 23 Oct 2025Grant permission

  The development will consist of: New 3 bed 2 storey dormer style house. The desi

  Permission · Dun Laoghaire Rathdown County Council, D25A/0805

• 23 Oct 2025Grant certificate of exemption

  1 dwelling

  Certificate of exemption - part v · Dun Laoghaire Rathdown County Council, V/083/25

The 25 most recent of 97 applications.

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 Thomastown.

Recorded monuments

No recorded monument lies in the townland of Thomastown.

Architectural heritage

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

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 low, low (inferred), on the 1:50,000 map.

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.

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

Name

Thomastown · Baile Thomáis

Area

860,655 m² (86.07 ha, 212.67 acres)

Civil parish

Monkstown, and its townlands

Barony

Rathdown

Electoral division

Dun Laoghaire Sallynoggin East, the unit of the census

Neighbouring townlands

Bullock, Glenagarey, Honeypark, Monkstown, Rochestown, Rochestown Domain, Woodpark

Placenames

Thomastown on logainm.ie, the Placenames Database of Ireland

Townlands, civil parishes, baronies and electoral divisions, National Statutory Boundaries, Tailte Éireann, 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.