4, Knocklyon Heights, Knocklyon, Dublin 16
Data updated 12 Sept 2026 · register lag up to 7 days · sources & freshness
SD21B/0079 is a planning application for permission at 4, Knocklyon Heights, Knocklyon, Dublin 16, received by South Dublin County Council on 10 Jun 2021 and first seen by Planning Register on 11 Sept 2026. The application describes: A storey and a half extension to the side comprising of a sitting room at ground level and home office at mezzanine level including internal modification works. The council granted permission on 7 Jul 2021. The five-week observation window closed on 15 Jul 2021. An Coimisiún Pleanála decided appeal 310999 on 17 Jan 2022 (grant conditions). The site is zoned R2 — existing residential under the South Dublin County Council development plan. Within 500 m there are 61 other decided applications in the last five years and 6 appeals.
Proposal
A storey and a half extension to the side comprising of a sitting room at ground level and home office at mezzanine level including internal modification works.
- Status
- Appeal decided
- Decision
- Grant permission on 7 Jul 2021
- Permission expires
- 3 Feb 2022
- Floor area
- 69 m²
- Site (from polygon)
- 780 m²
- Location precision
- site (coords_polygon)
Timeline
- 13 Apr 2021Further information requested
- 10 Jun 2021Further information received
- 10 Jun 2021New applicationObservation window closed 15 Jul 2021
- 7 Jul 2021DecisionAppeal window closed 4 Aug 2021
- 3 Aug 2021Appeal lodged
Full planning report for 53.28456, -6.32489
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1 Where this is — preview
1 Deadlines still open
Appeal
Commencement
No commencement notice matched to this reference.
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 · 2
- Recorded monument · 1
Provenance
Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 18:51 (store id 107968). 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/60266.
Source: npad · fetched 11 Sept 2026, 18:51
| Source | Licence | Fetched | Link |
|---|---|---|---|
| npad | CC-BY-4.0 | 11 Sept 2026, 18:51 | open |