Area guide
Castleknock, Dublin 15
Castleknock is home to 27,322 people (Census 2022) across 9.43 km², covered here by 2 Electoral Divisions in Fingal County Council. In the last 12 months the area recorded 84 planning applications and 285 property sales, with a typical price of €567,500.
Figures compiled 10 Nov 2026. Every number on this page comes from a named public dataset, listed at the end.
- Typical price
- €567,500median, last 12 months
- Property sales
- 285last 12 months
- Planning applications
- 84last 12 months
- Approval rate
- 89%decided, last 7 years
- Population
- 27,322Census 2022
- Gigabit broadband
- 96%premises passed, Q2 2026
Planning and development
Castleknock received 122 planning applications in 2025, up from 110 in 2024. Over the last seven years 721 applications were received within the Castleknock boundary, 612 approved and 77 refused, with 0 residential units applied for.
| Year | Received | Approved | Refused | Residential units |
|---|---|---|---|---|
| 2019 from Nov | 16 | 13 | 2 | 0 |
| 2020 | 84 | 65 | 18 | 0 |
| 2021 | 106 | 96 | 7 | 0 |
| 2022 | 99 | 88 | 5 | 0 |
| 2023 | 112 | 97 | 13 | 0 |
| 2024 | 110 | 99 | 9 | 0 |
| 2025 | 122 | 105 | 16 | 0 |
| 2026 to date | 72 | 49 | 7 | 0 |
- Approved612
- Refused77
- Under review14
- Withdrawn18
Planning applications: National Planning Application Database (NPAD), Department of Housing, Local Government and Heritage. Seven-year window from 10 Nov 2019, invalid applications excluded.
Property prices
Typical price in Castleknock rose from €475,500 in 2020 to €554,000 in 2026, up 17%.
How prices are measured on this page
Typical price is the median: half the sales were above it and half below. Average price is the mean, which a few very high or very low sales can pull up or down. They are two measures of the same sales, so they are expected to differ.
| Year | Sales | Typical price (median) | Average price (mean) |
|---|---|---|---|
| 2020 from Jun | 172 | €475,500 | €554,572 |
| 2021 | 369 | €456,000 | €506,928 |
| 2022 | 316 | €510,000 | €635,243 |
| 2023 | 303 | €513,000 | €604,712 |
| 2024 | 304 | €468,954 | €597,118 |
| 2025 | 319 | €554,000 | €655,233 |
| 2026 to date | 234 | €554,000 | €655,383 |
Property prices: Residential Property Price Register, Property Services Regulatory Authority (PSRA), sales from 4 Jun 2020 to 29 Oct 2026.
Transport, broadband and zoning
Public transport stops inside the Castleknock boundary, ComReg's fixed broadband coverage for its Small Areas, and how the current development plan zones the land.
- Rail and DART
- Coolmine, Navan Road Parkway
- Stop density
- 56 stops across 9.43 km², about 6 per km². Bus stops are counted per pole, so a road served in both directions counts twice.
Broadband figures are ComReg's averages across the 90 Small Areas that make up Castleknock: 96% of premises passed by a gigabit network and 78% connected. They describe the area, never one address.
Land use. 38% of the zoned land is residential under the current development plan, 2023 to 2029, 801 hectares in all.
| Zone | Description | Hectares | Share |
|---|---|---|---|
| G3 | Conservation, amenity or buffer space, corridor/belt, landscape | 327.5 | 41% |
| R2 | Existing residential | 285.7 | 36% |
| G4 | Active open space | 132.4 | 17% |
| C3 | Office, business/technology park and related | 18.8 | 2% |
| R1 | New/proposed residential | 16.9 | 2% |
| S3 | Community facilities | 15.4 | 2% |
| M2 | City/Town/village Centre, central area | 2.6 | 0% |
| M3 | District, neighbourhood centre | 1.4 | 0% |
| Other | Smaller zones | 0.2 | 0% |
Transport: GTFS, National Transport Authority. Broadband: ComReg Ireland Gigabit Statistics, Small Areas, CC BY 4.0; Small Area boundaries CSO, Q2 2026. Zoning: General Zoning Types (GZT), Irish local authorities via the Department of Housing.
Environment
Radon and green space for Castleknock, from the EPA radon map and the zoning record.
EPA reading for the highest grid square touching the area: Between five and ten per cent of the homes in this 10km grid square are estimated to be above the Reference Level.
Radon: EPA Radon Map, CC BY 4.0. EPA figures are for 10 km grid squares, so they describe the wider district, not one home.
Who lives here
27,322 people were counted in Castleknock in Census 2022, 21% of them children under 15 and 13% aged 65 or over. 71% of dwellings are owner occupied, and the area is home to about 2,897 people per km².
Neighbourhood profile. On the Pobal HP Index, a measure of an area's census makeup where 0 is the national average, Castleknock's Electoral Divisions score +10.9 on average, which is well above the national average.
| Age | People | Share |
|---|---|---|
| 0 to 14 | 5,846 | 21% |
| 15 to 24 | 3,011 | 11% |
| 25 to 44 | 8,396 | 31% |
| 45 to 64 | 6,607 | 24% |
| 65 and over | 3,462 | 13% |
| Tenure | Dwellings | Share |
|---|---|---|
| Owner occupied | 6,552 | 71% |
| Rented | 2,257 | 25% |
| Vacant | 385 | 4% |
Population, age and tenure: CSO Census 2022 Small Area Population Statistics; Small Area and Electoral Division boundaries, CSO and Tailte Éireann. Neighbourhood profile: Pobal HP Deprivation Index, most recent census.
How this area is defined
Castleknock on this page is the Central Statistics Office Electoral Divisions listed below: 90 Small Areas, 9.43 km². Planning, transport, broadband, radon, zoning and census figures are counted inside that boundary. Prices are matched by address, as explained above.
- Castleknock-Knockmaroon
- Castleknock-Park
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View a sample reportData sources
- Planning applications: National Planning Application Database (NPAD), Department of Housing, Local Government and Heritage
- Property prices: Residential Property Price Register, Property Services Regulatory Authority (PSRA)
- Population, age and tenure: CSO Census 2022 Small Area Population Statistics; Small Area and Electoral Division boundaries, CSO and Tailte Éireann
- Neighbourhood profile: Pobal HP Deprivation Index, most recent census
- Transport stops: GTFS, National Transport Authority
- Broadband: ComReg Ireland Gigabit Statistics, Small Areas, CC BY 4.0; Small Area boundaries CSO
- Radon: EPA Radon Map, CC BY 4.0
- Zoning: General Zoning Types (GZT), Irish local authorities via the Department of Housing