Planning Register
South Dublin County Council · SD24B/0483W · Permission

18, Glenlyon Crescent, Knocklyon, Dublin 16, D16 T2N4

Data updated 12 Sept 2026 · register lag up to 7 days · sources & freshness

Council received 30 Oct 2024We first saw it 11 Sept 2026, 18:51 (682 days after receipt — sources refresh weekly)
Applications only for this county. Appeals, zoning, RZLT and consultations: Dún Laoghaire-Rathdown and Fingal only for now.

SD24B/0483W is a planning application for permission at 18, Glenlyon Crescent, Knocklyon, Dublin 16, D16 T2N4, received by South Dublin County Council on 30 Oct 2024 and first seen by Planning Register on 11 Sept 2026. The application describes: Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w window, new access stairs and flat roof dormer to the rear. The council granted permission on 9 Dec 2024. The five-week observation window closed on 4 Dec 2024. A commencement notice (CN0126087SD) was lodged on 10 Mar 2025, 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 67 other decided applications in the last five years and 2 appeals.

Appeal window closes 15 Jan 2025 closed 606 days ago
4 weeks from the council's decision (9 Dec 2024) · s.37 Planning and Development Act 2000 · €220 to An Coimisiún Pleanála (€110 observer)
Council registerSite report

Proposal

Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w window, new access stairs and flat roof dormer to the rear.

Status
Final Grant
Decision
Grant permission on 9 Dec 2024
Final grant
28 Jan 2025
Permission expires
27 Jan 2030
Floor area
28 m²
Site (from polygon)
217 m²
Location precision
site (coords_polygon)

Timeline

  • 30 Oct 2024
    New application
    Observation window closed 4 Dec 2024
  • 9 Dec 2024
    Decision
    Appeal window closed 15 Jan 2025

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Appeal

Not appealed.

Commencement

  • Short commencement notice CN0126087SD
    10 Mar 202518 Glenlyon Crescent, Knocklyon, South Dublin, D16 T2N4matched by ref_exact

Zoning at the site

R2 — Existing residential

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
    About 1 in 20 homes in this area is likely to have high radon levels
  • Recorded monument · 3
    Fulacht fia; R149387; R149388

Provenance

Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 18:51 (store id 99087). 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/67160.

Source: npad · fetched 11 Sept 2026, 18:51
SourceLicenceFetchedLink
npadCC-BY-4.011 Sept 2026, 18:51open