PlanningRegister.ie
Dún Laoghaire-Rathdown County Council · D20B/0050

18, Thornhill Road, Mount Merrion, Co. Dublin, A94 YX22

Approved in 2020. Building started in 2021.

  1. 27 Feb 2020Received
  2. 19 Aug 2020Approved
  3. 24 Sept 2020Final approval
  4. 26 May 2021Building started
Status
Building startedi
Decision
Approved · 19 Aug 2020
Council
Dún Laoghaire-Rathdown County Council
Type
Permission
Site
531 m²

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What’s proposed

Permission sought for (a) Removal of existing storey rear extension (b)

Planning details

Reference
D20B/0050
Local authority
Dún Laoghaire-Rathdown County Council
Status
Commenced · register status “Decision made”
Received
27 Feb 2020
Observations close
2 Apr 2020 (closed 2377 days ago)
Decision due
20 Aug 2020 · decided 19 Aug 2020
Decision
Grant permission on 19 Aug 2020
Proposed development
Permission sought for (a) Removal of existing storey rear extension (b)
As published by the register.
Site area
531 m² from the mapped boundary, not the council's figure
Applicant
Not published — the national feed carries no applicant name council register

What could you build here?

Nearby 169 · 500 m · 5 years

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Homes nearby

Development land nearby

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Building started

  • 26 May 2021 · Builder told the council work was starting (opted out of the finish sign-off) CN0076384DR

Zoning

R2 — Existing residential

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

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.

Protections nearby 250 m

No mapped flood area nearby.

  • Radon risk area · 4
    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

Where this comes from

National planning feed (NPAD), fetched 11 Sept 2026, 15:18.

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

D20B/0050 is a planning application to Dún Laoghaire-Rathdown County Council for permission sought for (a) Removal of existing storey rear extension (b), received on 27 Feb 2020; permission was granted on 19 Aug 2020.