16, Castlefield Green, Knocklyon, Dublin 16, D16C9N1
Data updated 12 Sept 2026 · register lag up to 7 days · sources & freshness
SD25B/0122W is a planning application for permission at 16, Castlefield Green, Knocklyon, Dublin 16, D16C9N1, received by South Dublin County Council on 10 Mar 2025 and first seen by Planning Register on 11 Sept 2026. The application describes: For the construction of double storey side extension to existing semi-detached house, extension of existing single storey rear extension, conversion of existing attic to 2 No. Bedrooms with individual dormer windows and all associated works. Works on ground floor of double storey side extension consist of new utility area, and roller shutter door to house a vehicle securely in ground floor space and first floor consists of 2 new bedrooms with landing area. Demolition works include existing front side boundary wall and existing rear extension wall. The council granted permission on 29 Apr 2025. The five-week observation window closed on 14 Apr 2025. A commencement notice (CN0132908SD) was lodged on 5 Sept 2025, so works have started on site. The site is zoned G1 — open space with recreation under the South Dublin County Council development plan. Within 500 m there are 39 other decided applications in the last five years.
Proposal
For the construction of double storey side extension to existing semi-detached house, extension of existing single storey rear extension, conversion of existing attic to 2 No. Bedrooms with individual dormer windows and all associated works. Works on ground floor of double storey side extension consist of new utility area, and roller shutter door to house a vehicle securely in ground floor space and first floor consists of 2 new bedrooms with landing area. Demolition works include existing front side boundary wall and existing rear extension wall.
- Status
- Final Grant
- Decision
- Grant permission on 29 Apr 2025
- Final grant
- 10 Jun 2025
- Permission expires
- 9 Jun 2030
- Floor area
- 154 m²
- Site (from polygon)
- 300 m²
- Location precision
- site (coords_polygon)
Timeline
- 10 Mar 2025New applicationObservation window closed 14 Apr 2025
- 29 Apr 2025DecisionAppeal window closed 27 May 2025
Full planning report for 53.27897, -6.32540
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1 Where this is — preview
1 Deadlines still open
Appeal
Not appealed.
Commencement
- Opt out commencement notice CN0132908SD
Zoning at the site
OS: To preserve and provide for open space and recreational amenities
Open space with active recreational amenities — pitches, courts, play areas.
RES: To protect and/or improve residential amenity
An established residential area. The objective is to protect existing residential amenity as well as to provide housing — which is the objective a neighbour's objection to an overbearing extension is usually argued under.
Designations within 250 m
No OPW flood extent nearby.
- Radon risk area · 1
- Recorded monument · 4
Provenance
Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 18:51 (store id 106477). Deadlines were computed by the store from the received / decided dates under the Planning and Development Act 2000 and are recorded as events, not recomputed here. Council register: https://planning.agileapplications.ie/southdublin/application-details/67852.
Source: npad · fetched 11 Sept 2026, 18:51
| Source | Licence | Fetched | Link |
|---|---|---|---|
| npad | CC-BY-4.0 | 11 Sept 2026, 18:51 | open |