86, Mount Merrion Avenue, Blackrock, Co. Dublin, A94C4H0
Single-storey rear extension to a house in Blackrock.
D26B/0194/WEB · Dun Laoghaire Rathdown County Council · Lodged 2 April 2026
- Reference
- D26B/0194/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 2 April 2026
Summary
AI-generatedPlanning permission is sought for the construction of a single-storey extension to the rear of the existing house at 86 Mount Merrion Avenue.
- Storey
- 1
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
Planning permission for single storey extension to rear.
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 |
|---|---|---|---|
| 14 The Elms, Mount Merrion Ave, Blackrock | Apr 2025 | €470,000 | 83 m |
| 15 The Elms, Mount Merrion Ave, Blackrock | Mar 2026 | €490,000 | 83 m |
| 17 Hyde Park Avenue, Blackrock, Co Dublin | Dec 2025 | €1,600,000 | 107 m |
| 17 Southwood Park, Mount Merrion, Blackrock | Mar 2025 | €1,580,000 | 110 m |
| 4 The Elms, Mount Merrion Ave, Blackrock | Sept 2025 | €500,000 | 111 m |
| 21 The Elms, Mount Merrion Ave, Blackrock | Dec 2025 | €660,000 | 156 m |
| 1 Glenart, Clonfadda Wood, Mount Merrion Ave | Nov 2025 | €685,000 | 199 m |
| 5 Glenart, Clonfadda Wood, Mount Merrion Ave | Nov 2025 | €491,000 | 199 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 received2 April 2026
- Decision due27 May 2026
- Decision issued25 May 2026
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- GrantedAt this site
Planning permission for dormer to rear roof and hipped dormer to side roof to accommodate attic stairs to…
86 Mount Merrion Avenue, Blackrock, Co Dublin, A94 C4H0
D22B/0350Dún Laoghaire–RathdownLodged 27 Jul 2022Extension
- GrantedAt this site
Permission is sought for alterations and additions to single storey extension to rear (south elevation)…
84, Mount Merrion Avenue, Blackrock, Co. Dublin
D07B/0490Dún Laoghaire–RathdownLodged 30 May 2007Extension
- GrantedAt this site
Attic conversion to store room with gable end dormer and roof lights to rear. [LOCATION] 84 Mount Merrion…
84 Mount Merrion Avenue, Blackrock, Co. Dublin.
D02B/0063Dún Laoghaire–RathdownLodged 11 Feb 2002Extension
- GrantedAt this site
Demolition of existing single storey extensions to rear inside and construction of a single and two storey…
82, Mount Merrion Avenue, Blackrock, Co. Dublin
D04A/0400Dún Laoghaire–RathdownLodged 8 Apr 2004Extension
- Part granted, part refusedAt this site
Retention of alterations to attic room dormer window to rear, ground floor bay windows to side and rear and…
82, Mount Merrion Avenue, Blackrock, Co. Dublin
D06A/0525Dún Laoghaire–RathdownLodged 13 Apr 2006Retention
- GrantedAt this site
Railings to front garden to be contained within the existing curtilage and located on the inside of the…
82, Mount Merrion Avenue, Blackrock, Co. Dublin
D06A/0173Dún Laoghaire–RathdownLodged 9 Feb 2006Alterations
- Refused40 m away
Permission for the demolition of the existing shed abutting the eastern side boundary, and the construction…
The Gate Lodge, The Elms, Mount Merrion Avenue, Blackrock, Co. Dublin
D16B/0384Dún Laoghaire–RathdownLodged 13 Sept 2016Extension
- Invalid40 m away
Permission for the demolition of the existing shed abutting the eastern side boundary and the construction of…
The Gate Lodge, The Elms, Mount Merrion Avenue, Blackrock, Co Dublin
D16B/0288Dún Laoghaire–RathdownLodged 1 Jul 2016Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- GrantedExtension
Permission for single storey extension to rear
31 Treesdale, Stillorgan, Co Dublin
D14B/0302Dún Laoghaire–RathdownLodged 25 Aug 2014
- GrantedExtension
Planning permission for a single storey rear extension
64, Woodlawn Park, Churchtown, Dublin 14
D09B/0318Dún Laoghaire–RathdownLodged 21 Jul 2009
- GrantedExtension
Permission for single storey extension to the rear
22 Alma Road, Monkstown, Co Dublin
D17B/0338Dún Laoghaire–RathdownLodged 18 Jul 2017
- InvalidExtension
Permission for single storey extension at rear
1 Glencairn Heath, Leopardstown, Dublin 18
D18B/0536Dún Laoghaire–RathdownLodged 12 Dec 2018
- GrantedExtension
Permission for a single storey extension to the rear
16 Knocknashee, Dublin D14 Y729
D16B/0241Dún Laoghaire–RathdownLodged 8 Jun 2016
- GrantedExtension
Permission for a single storey extension to rear
31 Bellgree Rise, Blanchardstown, Dublin 15
FW14B/0077FingalLodged 4 Dec 2014
Community
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