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 12 Oct 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
Lands South of 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 →
169a Clonsilla Road, Clonsilla, Dublin 15
Ongar · zoned R2
Council selling or leasing the land
Stalled buildAll in Fingal →
Hansfield, Dublin 15: Phase 1
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 off Hazelbury Park, Clonee, Dublin 15
Littlepace · Ongar · 8.40 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Mount Symon Dale, Clonsilla, Dublin 15
Ongar · 5.03 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Within the Townlands of Barberstown, Barnhill and Passifyoucan
Ongar · 4.45 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Barnwell Woods, Hansfield, Dublin 15
Hansfield or Phibblestown · Ongar · 4.15 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Stonebridge Avenue, Clonsilla, Dublin 15
Ongar · 4.13 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Ashfield Gr, Mulhuddart, Dublin 15
Huntstown · Ongar · 4.06 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Blackwood Mews, Ongar Chase, Dublin 15
Hansfield or Phibblestown · Ongar · 3.74 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Willow Wood Grove, Clonsilla, Dublin 15
Ongar · 3.66 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Castlegrange Drive, Castaheany, Dublin 15
Ongar · 3.18 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Beechwood Heath, Hansfield
Barnhill · Ongar · 3.15 ha · zoned R1
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Woodvale Avenue, Clonsilla, Dublin 15
Blakestown · Ongar · 3.11 ha · zoned R2
On the RZLT map, no permission
On the RZLT map (3% land tax)
Residential land off Deerhaven Avenue, Clonee, Dublin 15
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 off Castaheany, Navan Road
Ongar · 4.60 ha · zoned G4
Publicly owned land
Public land off Beechwood Downs, Hartstown, Dublin 15
Ongar · 3.29 ha · zoned S3
Publicly owned land
Public land off Portersgate Crescent, Clonsilla, Dublin 15
Ongar · 3.10 ha · zoned G4
Publicly owned land
Public land off Latchford Close, Castaheany, Dublin 15
Ongar · 2.79 ha · zoned G4
Publicly owned land
Public land off Barnwell Grove, Barnwell
Barnhill · Ongar · 2.66 ha · zoned S3
Publicly owned land
Public land off Barnwell Terrace, Hansfield, Dublin 15
Barberstown · Ongar · 2.27 ha · zoned S3
Publicly owned land
Public land off Latchford Park, Clonee, Dublin 15
Castaheany · Ongar · 2.17 ha · zoned G4
Publicly owned land
Public land off Pinebrook View, Huntstown, Dublin 15
Castaheany · Ongar · 2.12 ha · zoned S3
Publicly owned land
Public land off Latchford Close, Clonee, Dublin 15
Castaheany · Ongar · 1.87 ha · zoned S3
Publicly owned land
Public land off Within the Townlands of Barberstown, Barnhill and Passifyoucan
Ongar · 1.60 ha · zoned G4
Publicly owned land
Public land off Castlegrange Lawn, Castlegrange
Castaheany · Ongar · 1.58 ha · zoned G4
Publicly owned land
Public land off Hazelwood Avenue, Huntstown, Dublin 15
Hartstown · Ongar · 1.55 ha · zoned G4
Publicly owned land
On the RZLT map (3% land tax)All in Fingal →
Residential land off Within the Townlands of Barberstown, Barnhill and Passifyoucan
Ongar · 7.40 ha · zoned R1
On the RZLT map (3% land tax)
Residential land off Zone 6 'canal ' and Zone 7 Railway, Hansfield Sdz, Dublin 1
Barberstown · Ongar · 7.32 ha · zoned R1
On the RZLT map (3% land tax)
Residential land off Churchgate, Clonsilla
Ongar · 6.58 ha · zoned R2
On the RZLT map (3% land tax)
Residential land off Station Street, Barnwell Park
Barberstown · Ongar · 2.71 ha · zoned R1
On the RZLT map (3% land tax)
Residential land off Park Crescent, Hansfield Wood
Clonsilla · Ongar · 2.05 ha · zoned R1
On the RZLT map (3% land tax)
Residential land off Allendale Square, Clonsilla, Dublin 15
Ongar · 1.38 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land off Park View, Hansfield Wood
Barberstown · Ongar · 1.33 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land off Zone 2 "ongar Road East", * Zone 6 "canal" of the
Barberstown · Ongar · 1.22 ha · zoned R2
On the RZLT map (3% land tax)
Underused site
Residential land off Allendale Court, Clonsilla, Dublin 15
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
- 44Commencement notices, last 12 months
Planning applications in Ongar (every application and decision, on Planning Register)
Other areas in Fingal
Figures as of 10 Oct 2026.