Development land in Ongar
411 sites in Ongar (Fingal) have a public reason they could sell. Zoned residential with no live permission: 276.2 ha.
- 1permissions running out or expired
- 2permitted, not started
- 1council selling land
- 4stalled builds
- 320on the RZLT map, no permission
Derelict and unbuilt land in Ongar
As of 25 Sep 2026, Ongar (Fingal) has 1,299 homes permitted but not started and 276 ha zoned for housing with no permission. 4 building sites started work and did not finish and the council has put 1 land disposal to councillors.
The sites
Permitted, not startedAll in Fingal →
Barberstown
Barnhill · Ongar · 29.59 ha · zoned R1
1,243 homes permitted, not started
Allendale House
Clonsilla · Ongar · 1.37 ha · zoned R2
56 homes permitted, not started
Permission expiredAll in Fingal →
Hansfield
Barnhill · Ongar · 5.82 ha · zoned R2
Permission for 106 homes expired unbuilt
Council selling landAll in Fingal →
Residential land at Clonsilla
Ongar · zoned R2
Council selling or leasing the land
Stalled buildAll in Fingal →
Residential land at Barberstown
Ongar · 6.70 ha · zoned R2
Stalled build
Hansfield Phase 3: 9 houses
Barberstown · Ongar · 6.70 ha · zoned R2
Stalled build
Barnwell Way & Barnwell Lane, Hansfield, Dublin 15
Barberstown · Ongar · 6.70 ha · zoned R2
Stalled build
Village Centre, Block C
Hansfield or Phibblestown · Ongar · 1.79 ha · zoned R1
Stalled build
On the RZLT map, no permissionAll in Fingal →
Residential land at Littlepace
Ongar · 8.40 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 5.03 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Barberstown
Ongar · 4.45 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Hansfield or Phibblestown
Ongar · 4.15 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 4.13 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Huntstown
Ongar · 4.06 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Hansfield or Phibblestown
Ongar · 3.74 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 3.66 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Castaheany
Ongar · 3.18 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Barnhill
Ongar · 3.15 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Blakestown
Ongar · 3.11 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land at Huntstown
Ongar · 2.99 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Publicly owned landAll in Fingal →
Public land at Castaheany
Ongar · 4.60 ha · zoned G4
Publicly owned land
Public land at Hartstown
Ongar · 3.29 ha · zoned S3
Publicly owned land
Public land at Clonsilla
Ongar · 3.10 ha · zoned G4
Publicly owned land
Public land at Castaheany
Ongar · 2.79 ha · zoned G4
Publicly owned land
Public land at Barnhill
Ongar · 2.66 ha · zoned S3
Publicly owned land
Public land at Barberstown
Ongar · 2.27 ha · zoned S3
Publicly owned land
Public land at Castaheany
Ongar · 2.17 ha · zoned G4
Publicly owned land
Public land at Castaheany
Ongar · 2.12 ha · zoned S3
Publicly owned land
Public land at Castaheany
Ongar · 1.87 ha · zoned S3
Publicly owned land
Public land at Barnhill
Ongar · 1.60 ha · zoned G4
Publicly owned land
Public land at Castaheany
Ongar · 1.58 ha · zoned G4
Publicly owned land
Public land at Hartstown
Ongar · 1.55 ha · zoned G4
Publicly owned land
On the RZLT map (3% land tax)All in Fingal →
Residential land at Barnhill
Ongar · 7.40 ha · zoned R1
On the RZLT map (3% land tax)
Residential land at Barberstown
Ongar · 7.32 ha · zoned R1
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 6.58 ha · zoned R2
On the RZLT map (3% land tax)
Residential land at Barberstown
Ongar · 2.71 ha · zoned R1
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 2.05 ha · zoned R1
On the RZLT map (3% land tax)
Residential land at Clonsilla
Ongar · 1.38 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land at Barberstown
Ongar · 1.33 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land at Barberstown
Ongar · 1.22 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land at Clonsilla
Ongar · 0.29 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Showing 41 of 411: the biggest of each kind. See every site on the map →
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.
Ongar in numbers
- 1,299Homes permitted, not started
- 322.1Hectares zoned residential
- 45Commencement notices, last 12 months
Planning applications in Ongar (every application and decision, on Planning Register)
Other areas in Fingal
Figures as of 24 Sept 2026.