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.
From public registers, checked 25 Sep 2026. Updated nightly.
- 26Council selling land
- 2Permission running out or expired
- 2Derelict site
- 41Stalled build
Sites that could sell in Blanchardstown, Castleknock and Ongar
Land in Blanchardstown-Mulhuddart
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 8 Sep 2025
Land at Cappogue Industrial Estate, Ballycoolin Road, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 9 Oct 2023
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 3 Oct 2024
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 5 Oct 2023
Land in Castleknock
Castleknock · Fingal · source
Council selling land
Notice dated 13 Jan 2026
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 13 Nov 2023
Land in Castleknock
Castleknock · Fingal · source
Council selling land
Notice dated 9 Feb 2026
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 14 Oct 2024
Land at Porterstown Road, Porterstown, Dublin 15
Castleknock · Fingal · source
Council selling land
Notice dated 7 Jul 2025
Land adjacent to Oatlands Gate Lodge, Porterstown Road, Dublin 15
Castleknock · Fingal · source
Council selling land
Notice dated 11 Mar 2024
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 14 Oct 2024
Land at Powerstown, Tyrellstown, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 10 Mar 2025
Land at North Road, Coldwinters, Dublin 11
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 5 Dec 2024
Land adjacent to Oatlands Gate Lodge, Porterstown Road, Dublin 15
Castleknock · Fingal · source
Council selling land
Notice dated 7 Mar 2024
Land in Blanchardstown-Mulhuddart
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 4 Sep 2025
Land in Ongar
Ongar · Fingal · source
Council selling land
Notice dated 13 Nov 2023
Land at Tyrrelstown
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 9 Feb 2026
Land in Ongar
Ongar · Dublin City · source
Council selling land
Notice dated 6 Jul 2026
Land in Blanchardstown-Mulhuddart
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 7 Nov 2024
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 3 Oct 2024
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 2 Nov 2023
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 2 Nov 2023
Site 1A, The Nurseries, Mulhuddart, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 13 Nov 2023
Land at Powerstown, Tyrellstown, Dublin 15
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 6 Mar 2025
Land at North Road, Coldwinters, Dublin 11
Blanchardstown-Mulhuddart · Fingal · source
Council selling land
Notice dated 9 Dec 2024
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More about Blanchardstown, Castleknock and Ongar
- How many development sites are there in Blanchardstown, Castleknock and Ongar?
- Buildable tracks 1,665 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?
- 485 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.
- How much zoned land in Blanchardstown, Castleknock and Ongar has no planning permission?
- 991 ha in Blanchardstown, Castleknock and Ongar is zoned for housing, on the RZLT map and has no live permission for 10 or more homes: 1,038 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: Council meeting agendas (s.183 disposal notices); Planning applications (Department of Housing national planning data); Council derelict sites registers (Derelict Sites Act 1990); Commencement and completion notices (National Building Control Office).
Cite this: Is there development land for sale in Blanchardstown, Castleknock and Ongar? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/development-land-for-sale-dublin-15
Facts from public registers, not advice. Every question · How it works