D25A/0862/WEB: Apply for Retention Permission for development within the grounds of Thornhill Oaks, and Thornhill House, a Protected Structure (RPS. 936). The development consists of the retention of an following: (i) Omission of railings to perimeter of central green; (ii) Omission of 4no. x pedestrian gates to the central green; (iii) Omission of hedge to perimeter of the central green; (iv) Omission of pedestrian crossing to the road on the southern side of the central green; (v) Addition of a low metal fence to centre/side of new hedge boundaries to rear gardens of Thornhill House & Houses 60 - 64 (inclusive); (vi) Provision of a pedestrian gate to the rendered blockwork wall to the southern boundary of the rear garden of House 64; (vii) Relocation of water feature from side boundary wall of House No. 64 to inner face of wall to communal courtyard serving Houses 60 to 64.
Thornhill Oaks, Cherrygarth, Mount Merrion, Blackrock, Co. Dublin, and Thornhill House (a Protected Structure) A94W7C5
DecisionGrant permission
Decided14 January 2026
Application typePermission
Source documents6
Site
What is on file
0refusal reasons0conditions8nearby records
Decision details
Core application dates and identifiers from the public planning record.Planning analysis
Refusal reasons and planning conditions extracted from the public decision file.Refusal reasons
No refusal reason on record
Documents are indexed. Reason extraction for Dún Laoghaire–Rathdown has not started yet.
Conditions
No conditions
No conditions are on record for this application yet.
Source documents
Original council portal records and source PDFs where available.- Planners ReportSource: planningapi.agileapplications.ie / Planners Report D25A 0862 WEB.pdf / Document 5531692Source PDF
- ReportsSource: planningapi.agileapplications.ie / 1908_thornhill_house_architectural_heritage_impact_asse.pdf / Document 5522651Source PDF
- ReportsSource: planningapi.agileapplications.ie / D25A_0862_WEB_Env_Enf.docx / Document 5523230Source PDF
- ReportsSource: planningapi.agileapplications.ie / D25A 0862 WEB Thornhill Oaks Blackrock CM 20251212 NO.docx / Document 5527769Source PDF
- ReportsSource: planningapi.agileapplications.ie / D25A0862_-_Cherrygarth_Mount_Merrion(1).msg / Document 5530873Source PDF
- ReportsSource: planningapi.agileapplications.ie / D25A0862 Thornhill Oaks Cherrygarth Mount Merrion Blackrock.doc / Document 5531512Source PDF
Nearby precedent
Similar nearby applications linked to this planning decision.- D24B/0425/WEBOak View Property Developments Limited, intend to apply for Retention Permission for development within the grounds of Thornhill Oaks, Cherrygarth, Mount Merrion, Blackrock, Co. Dublin. The development consists of the Retention of an external flight, (2.2 metres wide), of stone steps, (consisting of 10 no. x ambulant steps), providing pedestrian access, located at the southern gable of the existing Apartment block. Retention is also sought of a second flight (1.8 metres wide) of external stone steps, which also provides pedestrian access to Thornhill Oaks. This flight (consisting of a total of 6 no. x ambulant steps) is located west of the existing car ramp entrance to the Apartment block. / 0.0 km away / 02 December 2024Granted
- D19A/0748Permission for development on a site of c. 1.39 ha. / 0.0 km away / 02 December 2019Granted
- D24B/0345/WEBPermission is sought for The conversion of existing attic space to new bedroom and ensuite with dormer window and roof light to rear and 2 No. Roof lights to front Elevation and all associated site works / 0.0 km away / 19 September 2024Granted
- D26B/0071/WEBThe development consists of the following: Conversion of existing attic space to new bedroom and en-suite with dormer window and roof light to the rear of the property and 1no. rooflight to the front elevation, and all associated site works necessary to facilitate the development. / 0.0 km away / 31 March 2026Granted
- D24A/0131A) Demolition of the existing rear extension and side garage. B) The construction of a 108sqm part two-storey, part single-storey extension to front, side and rear. C) Internal alterations, elevational modifications including roof mounted solar panels and general refurbishment. D) Widening of vehicular entrance to 3.6m. E) New patio to rear and associated site works & landscaping. / 0.1 km away / 29 April 2024Granted
- D19B/0472Permission for conversion of garage to breakfast room / 0.1 km away / 15 January 2020Granted
- D16A/0888Permission for Retention for partial demolition of an existing / 0.1 km away / 01 February 2017Granted
- D16A/0194Permission is sought for the demolition of an existing flat roof structure to th / 0.1 km away / 13 May 2016Granted