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Where are the stalled building sites in Blanchardstown, Castleknock and Ongar?

41 building sites in Blanchardstown, Castleknock and Ongar started work but have no completion certificate, 1,707 homes in all, as of 25 Sep 2026. Each has a commencement notice with the National Building Control Office and is past its planned finish date.

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

Stalled builds in Blanchardstown, Castleknock and Ongar, largest first

  1. Hollywoodrath, Hollystown, Dublin 15

    Blanchardstown-Mulhuddart · Fingal · 28.54 ha · source

    Stalled build

    455 homes; commenced 24 Jul 2015, no completion certificate, planned end Jul 2016

  2. 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

  3. 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

  4. Barnwell Way & Barnwell Lane, Hansfield, Dublin 15

    Ongar · Fingal · 6.7 ha · source

    Stalled build

    146 homes; commenced 17 Apr 2015, no completion certificate, planned end Apr 2016

  5. Land in Ongar

    Ongar · Fingal · 6.7 ha · source

    Stalled build

    146 homes; commenced 16 Sep 2014, no completion certificate, planned end Mar 2015

  6. Hansfield Phase 3: 9 houses

    Ongar · Fingal · 6.7 ha · source

    Stalled build

    146 homes; commenced 19 Jun 2015, no completion certificate, planned end Mar 2016

  7. 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

  8. 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

  9. 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

  10. Village Centre, Block C

    Ongar · Fingal · 1.79 ha · source

    Stalled build

    59 homes; commenced 14 Apr 2021, no completion certificate, planned end Apr 2022

  11. 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

  12. Northwood Additional Floors

    Blanchardstown-Mulhuddart · Fingal · 0.39 ha · source

    Stalled build

    12 homes; commenced 12 Mar 2020, no completion certificate, planned end Jun 2021

  13. 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

  14. Mosque, Warrenstown House, Dublin 15

    Blanchardstown-Mulhuddart · Fingal · 0.78 ha · source

    Stalled build

    1 homes; commenced 28 Jan 2022, no completion certificate, planned end Jan 2023

  15. 55 Luttrellstown Drive, castleknock, Dublin

    Castleknock · Fingal · source

    Stalled build

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

  16. 6 Homeleigh, Dublin

    Castleknock · Fingal · 0.41 ha · source

    Stalled build

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

  17. Grove Road office re-organisation

    Castleknock · Fingal · source

    Stalled build

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

  18. ESBN Depot Finglas HVAC replacement

    Blanchardstown-Mulhuddart · Fingal · source

    Stalled build

    commenced 09 Oct 2020, no completion certificate, planned end Nov 2021

  19. IBM Building 5 minor internal layout modifications

    Blanchardstown-Mulhuddart · Fingal · source

    Stalled build

    commenced 11 Jun 2021, no completion certificate, planned end Aug 2021

  20. DUB110 Restructure Project

    Blanchardstown-Mulhuddart · Fingal · 0.91 ha · source

    Stalled build

    commenced 16 Jun 2022, no completion certificate, planned end Oct 2022

  21. Saint Margaret's Road, Dublin 11, Fingal

    Blanchardstown-Mulhuddart · Fingal · 4.88 ha · source

    Stalled build

    commenced 01 Feb 2021, no completion certificate, planned end Jun 2022

  22. 44008 - HSE - National Ambulance Service Facility, North Park, Finglas

    Blanchardstown-Mulhuddart · Fingal · source

    Stalled build

    commenced 15 Feb 2021, no completion certificate, planned end Mar 2021

  23. Unit 35 Rosemount Business Park, Ballycoolin.

    Blanchardstown-Mulhuddart · Fingal · source

    Stalled build

    commenced 02 Jun 2021, no completion certificate, planned end Aug 2021

  24. Saint Margaret's Park, Dublin 11, Fingal

    Blanchardstown-Mulhuddart · Fingal · 4.88 ha · source

    Stalled build

    commenced 08 Mar 2021, no completion certificate, planned end Jul 2022

  25. Bluesteel Kilshane Cross

    Blanchardstown-Mulhuddart · Fingal · 0.49 ha · source

    Stalled build

    commenced 28 Feb 2020, no completion certificate, planned end May 2020

Showing 25 of 41. See them all →

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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 25 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 25 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 25 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 25 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 25 Sep 2026. Sources: Commencement and completion notices (National Building Control Office).

Cite this: Where are the stalled building sites in Blanchardstown, Castleknock and Ongar? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/stalled-building-sites-dublin-15

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