5a, Knocklyon Ave, Knocklyon, DUBLIN 16
Data updated 12 Sept 2026 · register lag up to 7 days · sources & freshness
SD25B/0433W is a planning application for permission at 5a, Knocklyon Ave, Knocklyon, DUBLIN 16, received by South Dublin County Council on 7 Jul 2025 and first seen by Planning Register on 11 Sept 2026. The application describes: alterations to previously approved planning application Reg Ref No. SD24A/0034. The proposed alterations affect House B (5A Knocklyon Ave) of the previous application to include a 1st floor extension to the side (circa 6 Sq/M) & a single storey extension to the rear (circa 3 Sq/M) & all associated works. The council granted permission on 1 Sept 2025. The five-week observation window closed on 11 Aug 2025. A commencement notice (CN0140085SD) was lodged on 27 Mar 2026, so works have started on site. The site is zoned R2 — existing residential under the South Dublin County Council development plan. Within 500 m there are 57 other decided applications in the last five years and 3 appeals.
Proposal
alterations to previously approved planning application Reg Ref No. SD24A/0034. The proposed alterations affect House B (5A Knocklyon Ave) of the previous application to include a 1st floor extension to the side (circa 6 Sq/M) & a single storey extension to the rear (circa 3 Sq/M) & all associated works
- Status
- Final Grant
- Decision
- Grant permission on 1 Sept 2025
- Final grant
- 14 Oct 2025
- Permission expires
- 13 Oct 2030
- Floor area
- 35 m²
- Site (from polygon)
- 224 m²
- Location precision
- site (coords_polygon)
Timeline
- 7 Jul 2025New applicationObservation window closed 11 Aug 2025
- 1 Sept 2025DecisionAppeal window closed 29 Sept 2025
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1 Where this is — preview
1 Deadlines still open
Appeal
Not appealed.
Commencement
- Short commencement notice CN0140085SD
Zoning at the site
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
Provenance
Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 18:51 (store id 94487). 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/68554.
Source: npad · fetched 11 Sept 2026, 18:51
| Source | Licence | Fetched | Link |
|---|---|---|---|
| npad | CC-BY-4.0 | 11 Sept 2026, 18:51 | open |