What are the largest development sites in Ongar?
108 development sites in Ongar are a hectare or larger, as of 25 Sep 2026. The largest is Barberstown, at 29.6 ha (permitted, not started).
From public registers, checked 25 Sep 2026. Updated nightly.
Sites of a hectare or more in Ongar, largest first
Barberstown
Ongar · Fingal · 29.59 ha · source
Permitted, not started
1243 homes granted 30 Mar 2023, expires 30 Mar 2033
Land in Ongar
Ongar · Fingal · 8.4 ha · source
On the RZLT map, no permission
8.4 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 7.4 ha · source
On the RZLT map (3% land tax)
7.4 ha, On the 2027 draft RZLT map
Land in Ongar
Ongar · Fingal · 7.32 ha · source
On the RZLT map (3% land tax)
7.3 ha, On the 2027 draft RZLT map
Land in Ongar
Ongar · Fingal · 6.7 ha · source
Stalled build
146 homes; commenced 16 Sep 2014, no completion certificate, planned end Mar 2015
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
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
Land in Ongar
Ongar · Fingal · 6.58 ha · source
On the RZLT map (3% land tax)
6.6 ha, On the 2027 draft RZLT map
Hansfield
Ongar · Fingal · 5.82 ha · source
Permission expired
106 homes, expired 12 Oct 2025
Land in Ongar
Ongar · Fingal · 5.03 ha · source
On the RZLT map, no permission
5.0 ha, RZLT-liable and no live permission for 10+ homes on it
Public land in Ongar
Ongar · Fingal · 4.6 ha · source
Publicly owned land
4.6 ha, Held by Fingal County Council
Land in Ongar
Ongar · Fingal · 4.45 ha · source
On the RZLT map, no permission
4.5 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 4.15 ha · source
On the RZLT map, no permission
4.2 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 4.13 ha · source
On the RZLT map, no permission
4.1 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 4.06 ha · source
On the RZLT map, no permission
4.1 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 3.74 ha · source
On the RZLT map, no permission
3.7 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 3.66 ha · source
On the RZLT map, no permission
3.7 ha, RZLT-liable and no live permission for 10+ homes on it
Public land in Ongar
Ongar · Fingal · 3.29 ha · source
Publicly owned land
3.3 ha, Held by The Minister for Education and Skills
Land in Ongar
Ongar · Fingal · 3.18 ha · source
On the RZLT map, no permission
3.2 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 3.15 ha · source
On the RZLT map, no permission
3.1 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 3.11 ha · source
On the RZLT map, no permission
3.1 ha, RZLT-liable and no live permission for 10+ homes on it
Public land in Ongar
Ongar · Fingal · 3.1 ha · source
Publicly owned land
3.1 ha, Held by Fingal County Council
Land in Ongar
Ongar · Fingal · 2.99 ha · source
On the RZLT map, no permission
3.0 ha, RZLT-liable and no live permission for 10+ homes on it
Land in Ongar
Ongar · Fingal · 2.8 ha · source
On the RZLT map, no permission
2.8 ha, RZLT-liable and no live permission for 10+ homes on it
Public land in Ongar
Ongar · Fingal · 2.79 ha · source
Publicly owned land
2.8 ha, Held by Fingal County Council
Showing 25 of 108. See them all →
Go further
New development sites in Fingal, every Monday
The week's new sites: permission running out, council selling land, derelict or stalled. Each with its source. Free while in beta.
More about Ongar
- Is there development land for sale in Ongar?
- Buildable found 6 sites in Ongar with a public sign they could come to market, as of 25 Sep 2026: 1 council site proposed for sale, 1 site with planning permission running out or recently expired and 4 stalled builds. These come from public registers, not agents' listings, so many are not advertised yet.
- How many development sites are there in Ongar?
- Buildable tracks 411 development sites in 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 2 permitted schemes not started, 1 council land sale and 4 stalled builds.
- How much land in Ongar is on the RZLT map?
- 306 ha of land in Ongar is on the Residential Zoned Land Tax map, across 329 parcels (2027 draft RZLT map), as of 25 Sep 2026. 276 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 Ongar has no planning permission?
- 276 ha in Ongar is zoned for housing, on the RZLT map and has no live permission for 10 or more homes: 320 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 Residential Zoned Land Tax maps; Land Development Agency, Register of Relevant Lands; Planning applications (Department of Housing national planning data).
Cite this: What are the largest development sites in Ongar? Buildable, data as of 25 Sep 2026. https://buildable.ie/q/largest-development-sites-ongar
Facts from public registers, not advice. Every question · How it works