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Development land in Castleknock

554 sites in Castleknock (Fingal) have a public reason they could sell. Zoned residential with no live permission: 434.1 ha.

Derelict and unbuilt land in Castleknock

As of 12 Oct 2026, Castleknock (Fingal) has 1 derelict site, 1,889 homes permitted but not started and 434 ha zoned for housing with no permission. 4 building sites started work and did not finish and the council has put 7 land disposals to councillors.

The local land report: print it or share it →

The sites

Permitted, not startedAll in Fingal →

  1. Site A, Blanchardstown Town Centre, Coolmine

    Castleknock · 6.69 ha

    971 homes permitted, not started

  2. Blanchardstown Town Centre Sites B and C

    Coolmine · Castleknock · 2.58 ha · zoned M4

    352 homes permitted, not started

  3. Porterstown

    Castleknock · 4.39 ha · zoned R1

    302 homes permitted, not started

  4. Clonsilla Inn

    Porterstown · Castleknock · 2.08 ha · zoned M2

    170 homes permitted, not started

  5. Weavers Row Commercial Block

    Kellystown · Castleknock · 2.23 ha · zoned M2

    72 homes permitted, not started

  6. Parkside Block 3

    Ashtown · Castleknock · 0.66 ha · zoned R1

    22 homes permitted, not started

Council selling landAll in Fingal →

  1. Porterstown Road, Porterstown, Dublin 15

    Castleknock · zoned G4

    Council selling or leasing the land

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

    Castleknock

    Council selling or leasing the land

  3. Blanchardstown Road North, Blanchardstown, Dublin 15

    Castleknock · zoned R2

    Council selling or leasing the land

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

    Castleknock

    Council selling or leasing the land

  5. Georgian Village, Castleknock, Dublin 15

    Castleknock · zoned R2

    Council selling or leasing the land

  6. Kellystown, Dublin 15

    Porterstown · Castleknock

    Council selling or leasing the land

  7. Georgian Village, Castleknock, Dublin 15

    Castleknock · zoned R2

    Council selling or leasing the land

Derelict siteAll in Fingal →

  1. Allendale House, Clonsilla Road, Dublin 15

    Kellystown · Castleknock

    On the derelict sites register

Stalled buildAll in Fingal →

  1. Diswellstown, Castleknock, Dublin 15

    Castleknock · 9.50 ha · zoned R2

    Stalled build

  2. Diswellstown, Castleknock, Dublin 15

    Castleknock · 9.50 ha · zoned R2

    Stalled build

  3. 1-88 Parkside, Block 1, Phoenix Park ave., Castleknock D15

    Ashtown · Castleknock · 0.63 ha · zoned R1

    Stalled build

  4. Clonsilla Link Road, Dublin 15

    Castleknock · 4.32 ha · zoned R2

    Stalled build

On the RZLT map, no permissionAll in Fingal →

  1. Residential land off Georgian Village, Castleknock, Dublin 15

    Castleknock · 10.13 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  2. Residential land off Luttrell Park Drive, Carpenterstown Road, Dublin 15

    Diswellstown · Castleknock · 8.58 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  3. Residential land off Park View, Castleknock, Dublin 15

    Castleknock · 8.06 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  4. Residential land off The Hawthorns, Castleknock, Dublin 15

    Castleknock · 7.27 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  5. Residential land off Park Court, Pecks Lane, Dublin 15

    Castleknock · Castleknock · 7.22 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  6. Residential land off Rokeby Park, Lucan

    Laraghcon · Castleknock · 6.71 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  7. Residential land off Clonsilla Park, Blanchardstown, Dublin 15

    Castleknock · 6.44 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  8. Residential land off Springlawn Road, Blanchardstown, Dublin 15

    Castleknock · 6.10 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  9. Residential land off Georgian Village, Castleknock, Dublin 15

    Castleknock · 5.72 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  10. Residential land off Castleknock Green, Castleknock, Dublin 15

    Castleknock · 5.52 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  11. Residential land off The Pines, Castleknock, Dublin 15

    Castleknock · 5.35 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

  12. Residential land off Homeleigh, Porterstown, Dublin 15

    Astagob · Castleknock · 5.30 ha · zoned R2

    On the RZLT map, no permission

    On the RZLT map (3% land tax)

Publicly owned landAll in Fingal →

  1. Public land off Mount Sackville Convent, Knockmaroon Hill, Dublin 20

    Castleknock · Castleknock · 32.41 ha · zoned G3

    Publicly owned land

  2. Public land at Laraghcon

    Castleknock · 9.15 ha · zoned G4

    Publicly owned land

  3. Public land off Scoil Oilibheir, Snugborough Road Extension

    Coolmine · Castleknock · 8.36 ha · zoned S3

    Publicly owned land

  4. Public land off Astagob, Porterstown Road, Dublin 15

    Castleknock · 7.96 ha · zoned G4

    Publicly owned land

  5. Public land off The Strawberry Hall Beer Garden, Lower Road

    Diswellstown · Castleknock · 6.17 ha · zoned G3

    Publicly owned land

  6. Public land off Astagob, Porterstown Road, Dublin 15

    Castleknock · 5.95 ha · zoned G4

    Publicly owned land

  7. Public land off Diswellstown, Castleknock, Dublin 15

    Castleknock · 4.88 ha · zoned G3

    Publicly owned land

  8. Public land off Luttrellstown Road, Diswellstown, Dublin 15

    Castleknock · 4.21 ha

    Publicly owned land

  9. Public land off Travelodge (phoenix Park) Hotel, Navan Road, Dublin 15

    Castleknock · Castleknock · 4.11 ha

    Publicly owned land

  10. Public land off River Road, Castleknock, Dublin 15

    Castleknock · 3.23 ha · zoned G3

    Publicly owned land

  11. Public land off Grove Court, Grove Road

    Coolmine · Castleknock · 2.98 ha · zoned S3

    Publicly owned land

  12. Public land off Westend Village, Snugborough Road, Dublin 15

    Coolmine · Castleknock · 2.85 ha · zoned M4

    Publicly owned land

On the RZLT map (3% land tax)All in Fingal →

  1. Residential land off Laverna Way, Castleknock, Dublin 15

    Carpenterstown · Castleknock · 14.21 ha · zoned R2

    On the RZLT map (3% land tax)

  2. Residential land off Former Phoenix Park Racecourse, Ashtown, Dublin 15

    Castleknock · 12.79 ha · zoned R1

    On the RZLT map (3% land tax)

  3. Residential land off Kennan Drive, Luttrellstown Gate

    Porterstown · Castleknock · 8.55 ha · zoned R1

    On the RZLT map (3% land tax)

  4. Residential land off Diswellstown Way, Castleknock, Dublin 15

    Castleknock · 8.52 ha · zoned R2

    On the RZLT map (3% land tax)

  5. Residential land off Bramley Crescent, Carpenterstown, Dublin 15

    Castleknock · 4.05 ha · zoned R2

    On the RZLT map (3% land tax)

  6. Residential land off The Village, Porterstown, Dublin 15

    Kellystown · Castleknock · 3.17 ha · zoned R1

    On the RZLT map (3% land tax)

  7. Residential land off Woodbrook Crescent, Riverwood Road, Dublin 15

    Porterstown · Castleknock · 2.31 ha · zoned R1

    On the RZLT map (3% land tax)

  8. Residential land off The Village, Porterstown, Dublin 15

    Kellystown · Castleknock · 1.94 ha · zoned R2

    On the RZLT map (3% land tax)

    Underused site

  9. Residential land off Burnell Park Avenue, Castleknock, Dublin 15

    Diswellstown · Castleknock · 1.59 ha · zoned R2

    On the RZLT map (3% land tax)

  10. Residential land off The Courtyard, Clonsilla Road, Dublin 15

    Porterstown · Castleknock · 1.49 ha · zoned R2

    On the RZLT map (3% land tax)

    Underused site

  11. Mixed-use land off The Village, Porterstown, Dublin 15

    Kellystown · Castleknock · 1.36 ha · zoned M2

    On the RZLT map (3% land tax)

    Underused site

  12. Residential land off The Courtyard, Clonsilla Road, Dublin 15

    Porterstown · Castleknock · 1.26 ha · zoned R2

    On the RZLT map (3% land tax)

    Underused site

Showing 54 of 554: the biggest of each kind. See every site on the map →

All 554 sites in Castleknock →

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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.

Castleknock in numbers

  • 1,889Homes permitted, not started
  • 522.6Hectares zoned residential
  • 109Commencement notices, last 12 months

Planning applications in Castleknock (every application and decision, on Planning Register)

Other areas in Fingal

Figures as of 10 Oct 2026.

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