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Which public bodies own land in Blanchardstown, Castleknock and Ongar?

14 public bodies hold land in Blanchardstown, Castleknock and Ongar on the Land Development Agency's register, as of 26 Sep 2026. The largest holdings: Fingal County Council (353 ha), Dublin City Council (211 ha) and The Industrial Development Authority (140 ha).

From public registers, checked 26 Sep 2026. Updated nightly.

Public landowners in Blanchardstown, Castleknock and Ongar

  1. Fingal County Council

    Publicly owned land

    266 sites, 353 ha

  2. Dublin City Council

    Publicly owned land

    98 sites, 211 ha

  3. The Industrial Development Authority

    Publicly owned land

    33 sites, 140 ha

  4. Minister for Agriculture, Food and the Marine

    Publicly owned land

    8 sites, 46.5 ha

  5. The Minister for Education and Skills

    Publicly owned land

    28 sites, 45.4 ha

  6. Electricity Supply Board

    Publicly owned land

    13 sites, 36.3 ha

  7. Health Service Executive

    Publicly owned land

    13 sites, 35.5 ha

  8. The Office of Public Works

    Publicly owned land

    3 sites, 33.0 ha

  9. Institute of Technology Blanchardstown

    Publicly owned land

    4 sites, 23.1 ha

  10. Bord Gáis

    Publicly owned land

    5 sites, 7.2 ha

  11. Córas Iompair Éireann

    Publicly owned land

    5 sites, 2.0 ha

  12. Meath County Council

    Publicly owned land

    4 sites, 1.4 ha

  13. Dublin and Dun Laoghaire Education and Training Board

    Publicly owned land

    2 sites, 1.3 ha

  14. An Post

    Publicly owned land

    2 sites, 0.4 ha

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New development sites in Fingal, every Monday

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More about Blanchardstown, Castleknock and Ongar

Is there development land for sale in Blanchardstown, Castleknock and Ongar?
Buildable found 62 sites in Blanchardstown, Castleknock and Ongar with a public sign they could come to market, as of 26 Sep 2026: 26 council sites proposed for sale, 2 sites with planning permission running out or recently expired, 2 derelict sites on the register and 41 stalled builds. These come from public registers, not agents' listings, so many are not advertised yet.
How many development sites are there in Blanchardstown, Castleknock and Ongar?
Buildable tracks 1,663 development sites in Blanchardstown, Castleknock and Ongar, as of 26 Sep 2026: every site with a public reason it could be built on or sold, from the councils' and national registers. They include 9 permitted schemes not started, 13 derelict sites, 32 council land sales and 41 stalled builds.
What are the largest development sites in Blanchardstown, Castleknock and Ongar?
484 development sites in Blanchardstown, Castleknock and Ongar are a hectare or larger, as of 26 Sep 2026. The largest is public land in Blanchardstown-Mulhuddart, at 38.9 ha (publicly owned land).
How much land in Blanchardstown, Castleknock and Ongar is on the RZLT map?
1,104 ha of land in Blanchardstown, Castleknock and Ongar is on the Residential Zoned Land Tax map, across 1,093 parcels (2027 draft RZLT map), as of 26 Sep 2026. 991 ha of it has no live permission for 10 or more homes. The tax is 3% of market value a year, collected by Revenue on maps the councils make.

Data as of 26 Sep 2026. Sources: Land Development Agency, Register of Relevant Lands.

Cite this: Which public bodies own land in Blanchardstown, Castleknock and Ongar? Buildable, data as of 26 Sep 2026. https://buildable.ie/q/who-owns-public-land-dublin-15

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