How many homes have planning permission but haven't started in Castleknock?
2,064 homes in Castleknock have planning permission but no start recorded, across 7 permissions, as of 25 Sep 2026.
From public registers, checked 25 Sep 2026. Updated nightly.
- 2,064Homes not started
- 7Permissions
- 0Expiring within a year
The largest permitted schemes not started in Castleknock
Site A
Castleknock · Fingal · 6.69 ha · source
Permitted, not started
971 homes granted 26 May 2023, expires 26 May 2028
Site B and Site C
Castleknock · Fingal · 2.58 ha · source
Permitted, not started
352 homes granted 11 Jun 2024, expires 11 Jun 2029
Porterstown
Castleknock · Fingal · 4.39 ha · source
Permitted, not started
302 homes granted 24 Jun 2026, expires 24 Jun 2031
Winterwood
Castleknock · Fingal · 1.88 ha · source
Permitted, not started
175 homes granted 19 Sep 2025, expires 19 Sep 2030
Clonsilla Inn
Castleknock · Fingal · 2.08 ha · source
Permitted, not started
170 homes granted 21 Jan 2025, expires 21 Jan 2030
Weavers Row
Castleknock · Fingal · 2.23 ha · source
Permitted, not started
72 homes granted 19 Dec 2023, expires 19 Dec 2028
Parkside Block 3
Castleknock · Fingal · 0.66 ha · source
Permitted, not started
22 homes granted 17 Oct 2023, expires 17 Oct 2028
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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.
- 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.
- 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.
Data as of 25 Sep 2026. Sources: Planning applications (Department of Housing national planning data).
Cite this: How many homes have planning permission but haven't started in Castleknock? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/homes-permitted-not-built-castleknock
Facts from public registers, not advice. Every question · How it works