20, Springhill Park, Blackrock, Dublin, A94H671
Retention of a garage conversion into a granny flat, and permission for a new rear extension and attic conversion.
D26A/0167/WEB · Dun Laoghaire Rathdown County Council · Lodged 4 March 2026
- Reference
- D26A/0167/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 4 March 2026
Summary
AI-generatedThe applicant is seeking retention permission for an existing garage conversion used as a granny flat and a widened driveway gate. They are also seeking permission for a new single-storey rear kitchen extension and an attic conversion with a rear dormer window.
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
The development will consist of retention of the extension and conversion of an existing garage for use as a granny flat, and widening of the existing vehicular gate. Permission is also sought for a single storey rear kitchen extension, conversion of the existing attic as non habitable space with dormer window to rear and 2 no. Velux to front.
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 |
|---|---|---|---|
| 32 Springhill Park, Blackrock, Dublinnot full market price | Dec 2025 | €533,333 | 69 m |
| 17 Deansgrange Road, Blackrock, Co Dublin | Aug 2025 | €1,020,000 | 94 m |
| Rock View, Deans Grange Rd, Blackrock | Jun 2026 | €1,142,500 | 103 m |
| 18 Springhill Ave, Blackrock, Dublin | Sept 2025 | €770,000 | 168 m |
| 29a Brookville Park, Blackrock, Co Dublinnot full market price | Jan 2025 | €392,000 | 185 m |
| 70 Mount Albany, Blackrock, Dublin | Dec 2025 | €800,000 | 186 m |
| 12 Grange Grove, Stradbrook, Blackrock | Feb 2026 | €580,000 | 194 m |
| 3 St Fintans Villas, Deans Grange, Dublin | Mar 2026 | €525,000 | 213 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 received4 March 2026
- Decision due28 April 2026
- Decision issued9 March 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
The development will consist of Retention of the extension and conversion of an existing garage for use as a…
20, Springhill Park,Blackrock, Dublin, A94H671
D26A/0191/WEBDún Laoghaire–RathdownLodged 11 Mar 2026Retention
- InvalidAt this site
The development will consist of a single storey rear kitchen extension, conversion and extension of existing…
20, Springhill Park, Blackrck, Co. Dublin, A94H671
D26A/0005/WEBDún Laoghaire–RathdownLodged 8 Jan 2026Extension
- Granted40 m away
Attic conversion for storage use, including a rear dormer, two rooflights to the front roof slope, and a…
28, Springhill Park, Blackrock, Dublin, A94H027
D25B/0307/WEBDún Laoghaire–RathdownLodged 31 May 2025Extension
- Granted40 m away
For single storey porch/bathroom extension to front
9 Deansgrange Road, Blackrock, Dublin 18
D06B/0210Dún Laoghaire–RathdownLodged 14 Mar 2006Extension
- Granted50 m away
Single storey extension to the front of the existing house, internal alterations and associated external works
10, Deansgrange Road, Deansgrange, Dublin, A94T9C5
D26B/0104/WEBDún Laoghaire–RathdownLodged 18 Feb 2026Extension
- Granted50 m away
Permission for a single storey development consisting of the conversion and extension of an attached garage…
21 Springhill Park, Deansgrange, Blackrock, Co Dublin A94 KX82
D18A/0517Dún Laoghaire–RathdownLodged 31 May 2018Extension
- Granted50 m away
Attic conversion with dormer to rear roof to accomodate stairs to allow conversion of attic into non…
7, Deansgrange Road, Blackrock, Dublin, A94T9V2
D23B/0499Dún Laoghaire–RathdownLodged 31 Oct 2023Extension
- Granted60 m away
Planning permission for the addition of an obscure glass attic gable window to existing house
19, Springhill Park, Deansgrange, Blackrock, Co. Dublin, A94EP94
D22B/0307Dún Laoghaire–RathdownLodged 24 Jun 2022Alterations
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- GrantedRetention
The development will consist of Retention of the extension and conversion of an existing garage for use as a…
20, Springhill Park,Blackrock, Dublin, A94H671
D26A/0191/WEBDún Laoghaire–RathdownLodged 11 Mar 2026
- InvalidExtension
The development will consist of a single storey rear kitchen extension, conversion and extension of existing…
20, Springhill Park, Blackrck, Co. Dublin, A94H671
D26A/0005/WEBDún Laoghaire–RathdownLodged 8 Jan 2026
- GrantedExtension
This is an application for retention permission and completion of works. The development will consist of:…
23, Meadow Grove, Churchtown, Dublin 16
D07A/1110Dún Laoghaire–RathdownLodged 11 Oct 2007
- GrantedExtension
Retention of existing single storey extension to rear and garage to side, permission for proposed single…
7, Woodfarm Drive, Palmerstown, Dublin 20
SD22B/0030South DublinLodged 17 May 2022
- GrantedExtension
Planning permission for the construction of — a single storey extension to the front of the existing garage…
10, Beechpark Avenue, Dublin 5
5436/22Dublin CityLodged 14 Dec 2022
- GrantedExtension
Permission for (1) The conversion of an existing detached garage to habitable accommodation including…
1 College View , Old Youghal Road , Mayfield
2240942Cork CityLodged 16 Mar 2022
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