Planning Register
Dún Laoghaire-Rathdown County Council · D26B/0064/WEB · Permission

40 South Avenue, Mount Merrion, Blackrock, Co. Dublin, A94X5N0

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

Council received 4 Feb 2026We first saw it 11 Sept 2026, 15:18 (220 days after receipt — sources refresh weekly)

D26B/0064/WEB is a planning application for permission at 40 South Avenue, Mount Merrion, Blackrock, Co. Dublin, A94X5N0, received by Dún Laoghaire-Rathdown County Council on 4 Feb 2026 and first seen by Planning Register on 11 Sept 2026. The application describes: Permission is sought for; a) A proposed first floor extension to front, above ex… The council issued a split decision on 26 Mar 2026 (GRANT PERMISSION & REFUSE PERMISSION). The five-week observation window closed on 11 Mar 2026. The site is zoned R2 — existing residential under the Dún Laoghaire-Rathdown County Council development plan. Within 500 m there are 146 other decided applications in the last five years and 20 appeals.

Appeal window closes 23 Apr 2026 closed 142 days ago
4 weeks from the council's decision (26 Mar 2026) · s.37 Planning and Development Act 2000 · €220 to An Coimisiún Pleanála (€110 observer)
Council registerSite report

Proposal

Permission is sought for; a) A proposed first floor extension to front, above ex

The description is truncated at source (80 characters in the national feed). The full text is on the council register.

Status
Final Grant
Decision
Grant permission & refuse permission on 26 Mar 2026
Final grant
29 Apr 2026
Site (from polygon)
550 m²
Location precision
site (coords_polygon)

Timeline

  • 4 Feb 2026
    New application
    Observation window closed 11 Mar 2026
  • 26 Mar 2026
    Decision
    Appeal window closed 23 Apr 2026

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Appeal

Not appealed.

Commencement

No commencement notice matched to this reference.

    Zoning at the site

    R2 — Existing residential

    Objective A: A To provide residential development and improve residential amenity while protecting the existing residential amenities

    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.

    R2.6 — Existing residential

    Objective A: A To provide residential development and improve residential amenity while protecting the existing residential amenities

    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
      About 1 in 10 homes in this area is likely to have high radon levels; About 1 in 20 homes in this area is likely to have high radon levels
    • Record of Protected Structures · 1
      Thornhill House

    Provenance

    Register row from the national planning applications feed (NPAD), fetched 11 Sept 2026, 15:18 (store id 21658). 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/dunlaoghaire/application-details/?ref=D26B/0064/WEB.

    Source: npad · fetched 11 Sept 2026, 15:18
    SourceLicenceFetchedLink
    npadCC-BY-4.011 Sept 2026, 15:18open