43, Mount Alton, Dublin 16
Data updated 12 Sept 2026 · register lag up to 7 days · sources & freshness
SD20B/0303 is a planning application for permission at 43, Mount Alton, Dublin 16, received by South Dublin County Council on 24 Aug 2020 and first seen by Planning Register on 11 Sept 2026. The application describes: Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey extension with rooflight to rear; two storey extension to side of dwelling with garage doors, dormer window to front and rooflights; single storey extension to front of dwelling; alterations to existing fenestration and material finish to front and side of existing dwelling, including new roof finish; attic conversion with dormer windows and rooflights to front and rear; widening of existing vehicular entrance to 3.5m and all associated site works. The council granted permission on 16 Oct 2020. The five-week observation window closed on 28 Sept 2020. A commencement notice (CN0116229SD) was lodged on 17 Jun 2024, 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 58 other decided applications in the last five years and 5 appeals.
Proposal
Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey extension with rooflight to rear; two storey extension to side of dwelling with garage doors, dormer window to front and rooflights; single storey extension to front of dwelling; alterations to existing fenestration and material finish to front and side of existing dwelling, including new roof finish; attic conversion with dormer windows and rooflights to front and rear; widening of existing vehicular entrance to 3.5m and all associated site works.
- Status
- Decision
- Decision
- Grant permission on 16 Oct 2020
- Final grant
- 23 Nov 2020
- Floor area
- 132 m²
- Site (from polygon)
- 825 m²
- Location precision
- site (coords_polygon)
Timeline
- 24 Aug 2020New applicationObservation window closed 28 Sept 2020
- 16 Oct 2020DecisionAppeal window closed 13 Nov 2020

Full planning report for 53.28387, -6.32210
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1 Where this is — preview
1 Deadlines still open
Appeal
Not appealed.
Commencement
- Opt out commencement notice CN0116229SD
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.
- NIAH-recorded building · 2
- Radon risk area · 2
Provenance
Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 18:51 (store id 111185). 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/59279.
Source: npad · fetched 11 Sept 2026, 18:51
| Source | Licence | Fetched | Link |
|---|---|---|---|
| npad | CC-BY-4.0 | 11 Sept 2026, 18:51 | open |