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Which public bodies own land in Castleknock?

9 public bodies hold land in Castleknock on the Land Development Agency's register, as of 25 Sep 2026. The largest holdings: Fingal County Council (94.1 ha), Dublin City Council (34.3 ha) and The Office of Public Works (32.4 ha).

From public registers, checked 25 Sep 2026. Updated nightly.

Public landowners in Castleknock

  1. Fingal County Council

    Publicly owned land

    97 sites, 94.1 ha

  2. Dublin City Council

    Publicly owned land

    48 sites, 34.3 ha

  3. The Office of Public Works

    Publicly owned land

    1 site, 32.4 ha

  4. The Minister for Education and Skills

    Publicly owned land

    10 sites, 18.4 ha

  5. Health Service Executive

    Publicly owned land

    3 sites, 1.3 ha

  6. Electricity Supply Board

    Publicly owned land

    3 sites, 0.8 ha

  7. An Post

    Publicly owned land

    2 sites, 0.4 ha

  8. Dublin and Dun Laoghaire Education and Training Board

    Publicly owned land

    1 site, 0.3 ha

  9. Bord Gáis

    Publicly owned land

    1 site, 0.1 ha

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New development sites in Fingal, every Monday

The week's new sites: permission running out, council selling land, derelict or stalled. Each with its source. Free while in beta.

More about Castleknock

Is there development land for sale in Castleknock?
Buildable found 17 sites in Castleknock with a public sign they could come to market, as of 25 Sep 2026: 5 council sites proposed for sale, 1 derelict site on the register and 11 stalled builds. These come from public registers, not agents' listings, so many are not advertised yet.
How many development sites are there in Castleknock?
Buildable tracks 563 development sites in Castleknock, as of 25 Sep 2026: every site with a public reason it could be built on or sold, from the councils' and national registers. They include 7 permitted schemes not started, 1 derelict site, 7 council land sales and 11 stalled builds.
What are the largest development sites in Castleknock?
179 development sites in Castleknock are a hectare or larger, as of 25 Sep 2026. The largest is public land in Castleknock, at 32.4 ha (publicly owned land).
How much land in Castleknock is on the RZLT map?
499 ha of land in Castleknock is on the Residential Zoned Land Tax map, across 371 parcels (2027 draft RZLT map), as of 25 Sep 2026. 434 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 25 Sep 2026. Sources: Land Development Agency, Register of Relevant Lands.

Cite this: Which public bodies own land in Castleknock? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/who-owns-public-land-castleknock

Facts from public registers, not advice. Every question · How it works