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How many development sites are there in Castleknock?

Buildable tracks 562 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.

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

  • 371On the RZLT map (3% land tax)
  • 352On the RZLT map, no permission
  • 165Publicly owned land
  • 11Stalled build
  • 7Council selling land
  • 7Permitted, not started
  • 1Derelict site

Sites in Castleknock, the soonest to move first

  1. Land at Porterstown Road, Porterstown, Dublin 15

    Castleknock · Fingal · source

    Council selling land

    Notice dated 7 Jul 2025

  2. Land adjacent to Oatlands Gate Lodge, Porterstown Road, Dublin 15

    Castleknock · Fingal · source

    Council selling land

    Notice dated 7 Mar 2024

  3. Land adjacent to Oatlands Gate Lodge, Porterstown Road, Dublin 15

    Castleknock · Fingal · source

    Council selling land

    Notice dated 11 Mar 2024

  4. Land in Castleknock

    Castleknock · Fingal · source

    Council selling land

    Notice dated 8 Apr 2024

  5. Land in Castleknock

    Castleknock · Fingal · source

    Council selling land

    Notice dated 9 Feb 2026

  6. Land at Kellystown, Dublin 15

    Castleknock · Fingal · source

    Council selling land

    Notice dated 3 Sep 2026

  7. Land in Castleknock

    Castleknock · Fingal · source

    Council selling land

    Notice dated 13 Jan 2026

  8. Allendale House, Clonsilla Road, Dublin 15

    Castleknock · Fingal · source

    Derelict site

    Register ref DS 25.05, entered 23 Jun 2025, market value €150,000

  9. Diswellstown, Castleknock, Dublin 15

    Castleknock · Fingal · 9.5 ha · source

    Stalled build

    224 homes; commenced 12 Nov 2014, no completion certificate, planned end Jul 2015

  10. Diswellstown, Castleknock, Dublin 15

    Castleknock · Fingal · 9.5 ha · source

    Stalled build

    224 homes; commenced 01 Jun 2015, no completion certificate, planned end Feb 2016

  11. Clonsilla Link Road, Dublin, Dublin 15

    Castleknock · Fingal · 4.32 ha · source

    Stalled build

    62 homes; commenced 11 May 2018, no completion certificate, planned end Nov 2019

  12. Works at Oatlands House

    Castleknock · Fingal · 1.31 ha · source

    Stalled build

    12 homes; commenced 25 Sep 2017, no completion certificate, planned end Jul 2018

  13. Clonsilla Road, Clonsilla, Dublin 15

    Castleknock · Fingal · 1.04 ha · source

    Stalled build

    33 homes; commenced 23 Mar 2017, no completion certificate, planned end Jul 2017

  14. 1-88 Parkside, Block 1, Phoenix Park ave., Castleknock D15

    Castleknock · Fingal · 0.63 ha · source

    Stalled build

    88 homes; commenced 22 Oct 2021, no completion certificate, planned end Oct 2022

  15. 6 Homeleigh, Dublin

    Castleknock · Fingal · 0.41 ha · source

    Stalled build

    1 homes; commenced 27 Oct 2022, no completion certificate, planned end Mar 2023

  16. Grove Court Apartments External Works

    Castleknock · Fingal · 0.34 ha · source

    Stalled build

    97 homes; commenced 10 Apr 2018, no completion certificate, planned end Jun 2018

  17. 55 Luttrellstown Drive, castleknock, Dublin

    Castleknock · Fingal · source

    Stalled build

    1 homes; commenced 13 Aug 2018, no completion certificate, planned end Nov 2018

  18. Grove Road office re-organisation

    Castleknock · Fingal · source

    Stalled build

    commenced 11 Feb 2019, no completion certificate, planned end Apr 2019

  19. UNIT 401 RETAIL PARK 1 BLANCHARDSTOWN CENTRE, Dublin, Fingal

    Castleknock · Fingal · source

    Stalled build

    commenced 09 Jun 2022, no completion certificate, planned end Jul 2022

  20. Site A

    Castleknock · Fingal · 6.69 ha · source

    Permitted, not started

    971 homes granted 26 May 2023, expires 26 May 2028

  21. Porterstown

    Castleknock · Fingal · 4.39 ha · source

    Permitted, not started

    302 homes granted 24 Jun 2026, expires 24 Jun 2031

  22. Site B and Site C

    Castleknock · Fingal · 2.58 ha · source

    Permitted, not started

    352 homes granted 11 Jun 2024, expires 11 Jun 2029

  23. Weavers Row

    Castleknock · Fingal · 2.23 ha · source

    Permitted, not started

    72 homes granted 19 Dec 2023, expires 19 Dec 2028

  24. Clonsilla Inn

    Castleknock · Fingal · 2.08 ha · source

    Permitted, not started

    170 homes granted 21 Jan 2025, expires 21 Jan 2030

  25. Winterwood

    Castleknock · Fingal · 1.88 ha · source

    Permitted, not started

    175 homes granted 19 Sep 2025, expires 19 Sep 2030

Showing 25 of 562. See them all →

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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.
What are the largest development sites in Castleknock?
178 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.
How much zoned land in Castleknock has no planning permission?
434 ha in Castleknock is zoned for housing, on the RZLT map and has no live permission for 10 or more homes: 352 parcels, as of 25 Sep 2026. Land on the map is liable for the Residential Zoned Land Tax of 3% of market value a year.

Data as of 25 Sep 2026. Sources: Planning applications (Department of Housing national planning data); Council derelict sites registers (Derelict Sites Act 1990); Council meeting agendas (s.183 disposal notices); Council Residential Zoned Land Tax maps; Land Development Agency, Register of Relevant Lands.

Cite this: How many development sites are there in Castleknock? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/how-many-development-sites-castleknock

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