At a site of c.1.39ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co. Dublin (Protected Structure Ref. No. 936)
Temporary removal and reinstatement of a stone boundary wall at Thornhill House.
D20A/0057 · Dun Laoghaire Rathdown County Council · Lodged 28 January 2020
- Reference
- D20A/0057
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 28 January 2020
Summary
AI-generatedThis application seeks permission for the temporary removal of the eastern stone wall boundary at Thornhill House, which is a protected structure. The wall will be reinstated following the completion of construction works on the wider site.
Generated from the description above by an AI model and may contain mistakes. The council’s description is the authoritative record.
Official record
Development description
Permission for development. The proposed development will consist of the temporary removal of the eastern stone wall boundary and its subsequent reinstatement upon the completion of construction works on the wider site.
Land-use zoning
What this land is zoned for
“A To provide residential development and improve residential amenity while protecting the existing residential amenities”
Objective set by the COUNTY DEVELOPMENT PLAN 2022-2028 (2022–2028). The planning authority decides each application on its own merits — this is the zoning context, not a compliance assessment.
Read the zoning objectives in the development planBuilt & sold
What happened next
Beyond the decision: whether this development was built, and what property here has sold for.
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 61 The Stables, Thornhill Oaks, Mount Merrionprice excludes VAT | Aug 2025 | €889,868 | 27 m |
| 50 Thornhill Oaks, Cherry Garth, Mount Merrion | Sept 2025 | €1,500,000 | 47 m |
| Thornhill, Cherry Garth, Mount Merrion | Aug 2025 | €1,750,000 | 49 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrion | Dec 2025 | €1,430,135 | 50 m |
| 63 Thornhill Oaks, Blackrock, Co. Dublin | May 2026 | €870,000 | 51 m |
| Apt.28 - Thornhill Oaks, Cherry Garth - Mount Merrion, Blackrock | Jul 2025 | €999,999 | 53 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrionprice excludes VAT | Jan 2025 | €1,145,374 | 58 m |
| 62 Thornhill Oaks, Blackrock, Co. Dublinprice excludes VAT | Mar 2026 | €859,031 | 62 m |
Nearby properties, not this site — a guide to local values.
Sources: Building Control Management System (commencement notices) and the Residential Property Price Register, licensed under CC BY 4.0. Records are matched to this application by location and may not be exhaustive; always confirm against the official source before relying on them.
Key dates
Timeline
- Application received28 January 2020
- Decision issued18 March 2020
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- InvalidAt this site
Permission for development. The proposed development will consist of the reconfiguration and redesign of the…
Site of c. 1.39 ha, Thornhill House, CherryGarth, Mount Merrion, Blackrock, Co. Dublin
D20A/0274Dún Laoghaire–RathdownLodged 30 Mar 2020Housing estate
- RefusedAt this site
Permission for development. The proposed development will consist of the reconfiguration and redesign of the…
Site of c. 1.39 ha, Thornhill House, CherryGarth, Mount Merrion, Blackrock, Co. Dublin
D20A/0432Dún Laoghaire–RathdownLodged 22 Jun 2020Housing estate
- RefusedAt this site
Permission for development. The proposed development will consist of: Conservation works to Thornhill House,…
Site of c. 1.39 ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co.Dublin A Protected Structure (RPS No. 936)
D21A/0161Dún Laoghaire–RathdownLodged 26 Feb 2021Housing estate
- GrantedAt this site
Oak View Property Developments Limited, intend to apply for Retention Permission for development within the…
Thornhill Oaks, Cherrygarth, Mount Merrion, Blackrock, Dublin, A94W7C5
D24B/0425/WEBDún Laoghaire–RathdownLodged 8 Oct 2024Retention
- GrantedAt this site
Apply for Retention Permission for development within the grounds of Thornhill Oaks, and Thornhill House, a…
Thornhill Oaks, Cherrygarth, Mount Merrion, Blackrock, Co. Dublin, and Thornhill House (a Protected Structure) A94W7C5
D25A/0862/WEBDún Laoghaire–RathdownLodged 12 Nov 2025Retention
- Compliance submissionAt this site
Compliance with Condition no. 19 of Reg Ref no. ABP-31028521 (D21A/0161)
Site of c. 1.39 ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co.Dublin A Protected Structure (RPS No. 936)
D21A/0161/C8Dún Laoghaire–RathdownLodged 23 Jun 2023Other
- Compliance submissionAt this site
Compliance with Condition no.5 of Reg Ref no. ABP-31028521 (D21A/0161)
Site of c. 1.39 ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co.Dublin A Protected Structure (RPS No. 936)
D21A/0161/C3Dún Laoghaire–RathdownLodged 4 Apr 2023Other
- Compliance submissionAt this site
Compliance with Condition no.12 of Reg Ref no. ABP-31028521 (D21A/0161) (N&N)
Site of c. 1.39 ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co.Dublin A Protected Structure (RPS No. 936)
D21A/0161/C4Dún Laoghaire–RathdownLodged 4 Apr 2023Other
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