8 Greygates, Mount Merrion, Blackrock, Co. Dublin
Retention of a single-storey rear extension to an existing house.
D19B/0339 · Dun Laoghaire Rathdown County Council · Lodged 19 July 2019
- Reference
- D19B/0339
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission for Retention
- Received
- 19 July 2019
Summary
AI-generatedThe applicant is seeking permission to retain a single-storey extension built at the rear of the existing dwelling. The extension measures 46 square metres and includes associated site works.
- Storey
- 1
- Floor area
- 46 m²
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 retention of development. The development consists of a single storey extension to the rear of the existing dwelling amounting to 46 square meters and associated site works.
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 |
|---|---|---|---|
| 5 Greygates, Stillorgan Road, Mount Merrion | Jun 2025 | €1,690,000 | 43 m |
| Apartment 9 Greygates, Roebuck Ave, Mount Merrionprice excludes VAT | Jan 2026 | €190,000 | 83 m |
| Apartment No. 7, Greysgate Hall, Mount Merrion | Jan 2025 | €640,000 | 83 m |
| Apt 29 Sanderling, Thornwood, Booterstown Avenue | Jan 2026 | €592,000 | 113 m |
| 27 The Sanderling, Thorn Wood, Booterstown Ave | Dec 2025 | €590,000 | 113 m |
| 36 Turnstone, Thorn Wood, Booterstown Ave | Apr 2025 | €650,000 | 122 m |
| Apt 26 The Heron Building, Thornwood, Booterstown Ave | May 2026 | €460,250 | 133 m |
| Apt 7, The Lapwing Building, Booterstown Ave | Apr 2026 | €425,000 | 148 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 received19 July 2019
- Decision issued9 September 2019
- Appeal submitted3 October 2019
- Appeal decided26 February 2020
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
Permission. The development consists of a single storey extension to the rear (south-west) of the existing…
8 Greygates, Mount Merrion, Blaockrock, Co. Dublin
D21B/0272Dún Laoghaire–RathdownLodged 2 Jun 2021Extension
- GrantedAt this site
Alterations and additions to an existing 2-storey detached dwelling at No.9 Greygates, Mount Merrion, Co.…
9, Greygates, Mount Merrion, Co. Dublin, A94N9D5
D23A/0620Dún Laoghaire–RathdownLodged 31 Jan 2024Extension
- Granted30 m away
Permission for alterations and additions to an existing 2 storey detached dwelling. The development will…
6, Greygates, Stillorgan Road, Blackrock, Dublin, A94H2D5
D24B/0142Dún Laoghaire–RathdownLodged 28 Jun 2024Extension
- Granted70 m away
Demolition of flat roofed extension and garage and construction of single storey (incorporating mezzanine…
3, Roebuck Avenue, Mount Merrion, Co. Dublin
D06B/0455Dún Laoghaire–RathdownLodged 22 May 2006Extension
- Granted70 m away
Alterations to existing entrance canopy roof to form new front porch extension; removal of chimney to north…
3, Greygates, Stillorgan Road, Blackrock, Dublin, A94T9K0
D26B/0083/WEBDún Laoghaire–RathdownLodged 12 Feb 2026Extension
- Granted70 m away
Permission to extend and alter their home. The proposal seeks to adapt the existing roof by extending over…
5 Roebuck Avenue, Mt. Merrion, Blackrock, Co. Dublin, A94 TA40
D21A/0843Dún Laoghaire–RathdownLodged 29 Nov 2021Extension
- Granted70 m away
Planning permission for the demolition of existing garage and rear extension and the construction of new…
18, The Rise, Mount Merrion, Co. Dublin
D10A/0357Dún Laoghaire–RathdownLodged 28 Sept 2010Extension
- Granted70 m away
Planning permission for the retention of modifications to garden chalet
18, The Rise, Mount Merrion, Co. Dublin
D11B/0311Dún Laoghaire–RathdownLodged 22 Sept 2011Retention
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
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- GrantedRetention
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26/0062corkLodged 15 Jan 2026
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Permission for retention for a single storey extension to rear of existing dwelling and all associated site…
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