Question 1

How many development sites are there in Blanchardstown, Castleknock and Ongar?

Accepted Answer

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.

Question 2

Is there development land for sale in Blanchardstown, Castleknock and Ongar?

Accepted Answer

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.

Question 3

What are the largest development sites in Blanchardstown, Castleknock and Ongar?

Accepted Answer

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).

Question 4

How much land in Blanchardstown, Castleknock and Ongar is on the RZLT map?

Accepted Answer

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.

Question 5

How much zoned land in Blanchardstown, Castleknock and Ongar has no planning permission?

Accepted Answer

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.

How many development sites are there in Blanchardstown, Castleknock and Ongar?

Sites in Blanchardstown, Castleknock and Ongar, the soonest to move first

Land in Ongar

Land at Porterstown Road, Porterstown, Dublin 15

Land at Tyrrelstown

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Land in Blanchardstown-Mulhuddart

Land in Blanchardstown-Mulhuddart

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

Land in Blanchardstown-Mulhuddart

Land at Cappogue Industrial Estate, Ballycoolin Road, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Land at North Road, Coldwinters, Dublin 11

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

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

Land at North Road, Coldwinters, Dublin 11

Land in Castleknock

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

Land at Powerstown, Tyrellstown, Dublin 15

Land in Castleknock

Land in Blanchardstown-Mulhuddart

Land at Kellystown, Dublin 15

Site 1A, The Nurseries, Mulhuddart, Dublin 15

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