5A, Sefton, Rochestown Avenue, Dun Laoghaire, Dublin, A96VK3T
Addition of a second floor to an existing two-storey house.
D25B/0411/WEB · Dun Laoghaire Rathdown County Council · Lodged 21 July 2025
- Reference
- D25B/0411/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 21 July 2025
Summary
AI-generatedPlanning permission is sought to construct a new second floor on top of an existing two-storey detached house.
- Storeys
- 3
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 is sought for the addition of a second floor to an existing two storey house.
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 |
|---|---|---|---|
| 5a Sefton, Rochestown Ave, Dun Laoghaire | Jul 2026 | €860,000 | 3 m |
| 7 Sefton, Rochestown Ave, Dun Laoghaire | Oct 2025 | €1,008,000 | 43 m |
| 17 Sefton, Rochestown Ave, Dun Laoghaire | Oct 2025 | €805,000 | 120 m |
| 18 Sefton, Rochestown Ave, Dun Laoghaire | Jul 2025 | €850,000 | 123 m |
| 54 Sefton, Rochestown Ave, Dun Laoghaire | May 2026 | €980,000 | 152 m |
| 46 Sefton, Rochestown Ave, Dun Laoghaire | Feb 2026 | €790,000 | 182 m |
| 64 Sallynoggin Park, Sallynoggin, Dublin | Dec 2025 | €465,000 | 247 m |
| 69 Rochestown Ave, Dun Laoghaire, Dublin | Jun 2025 | €850,000 | 256 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 received21 July 2025
- Decision due12 September 2025
- Decision issued11 September 2025
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 for construction of a new two storey three bedroom detached house with new vehicular entrance,…
Side of 5 Sefton, Rochestown Avenue, Dún Laoghaire, Co Dublin
D17A/0680Dún Laoghaire–RathdownLodged 28 Jul 2017New dwelling
- Granted40 m away
Permission for the demolition of a single storey garage, the construction of a two storey, three bedroom,…
6, Sefton, Rochestown Avenue, Dun Laoghaire, Co. Dublin, A96 T6T0
D20A/0157Dún Laoghaire–RathdownLodged 28 Feb 2020New dwelling
- Refused80 m away
New two storey house to the side garden and widening of existing entrance gate
13, Sefton, Rochestown Avenue, Dun Laoghaire, Co. Dublin
D04A/1563Dún Laoghaire–RathdownLodged 23 Dec 2004New dwelling
- Granted80 m away
Permission is sought for a two storey three bedroom detached house to the side of No. 13 Sefton, a new…
13, Sefton, Rochestown Avenue, Dun Laoghaire, Co. Dublin.
D08A/1311Dún Laoghaire–RathdownLodged 2 Dec 2008New dwelling
- Granted80 m away
Two storey three bedroom house to the side of No. 13 Sefton, a new vehicular and pedestrian entrance off the…
13, Sefton, Dun Laoghaire, Rochestown Avenue, Dun Laoghaire, Co. Dublin
D06A/0618Dún Laoghaire–RathdownLodged 3 Aug 2006New dwelling
- Granted80 m away
The development will consist of the provision of one no. two-storey four bedroom house adjacent and to the…
13, Sefton, Rochestown Avenue, Dun Laoghaire, Co. Dublin
D05A/0496Dún Laoghaire–RathdownLodged 5 Jul 2005New dwelling
- Granted80 m away
Retention of existing garden wall to the rear
13, Sefton, Rochestown Avenue, Dun Laoghaire, Co. Dublin.
D05B/0502Dún Laoghaire–RathdownLodged 1 Jul 2005Retention
- Granted80 m away
Permission sought for the relocation and widening of the existing front entrance access
13, Sefton, Rochestown Avenue, Dun Laoghaire, Co Dublin
D07A/0332Dún Laoghaire–RathdownLodged 12 Mar 2007Alterations
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
Planning Permission is sought for a two storey extension
23 Laraghcon, Lucan, Co Dublin
FW12A/0145FingalLodged 24 Dec 2012
- GrantedExtension
Planning permission is sought to construct a two storey extension to the rear of the existing house
17, Gledswood Avenue, Clonskeagh, Dublin 14
D10B/0148Dún Laoghaire–RathdownLodged 1 Apr 2010
- GrantedExtension
Permission is sought for a two storey (basement & ground floor) extension to side of existing house
Shelsbury, 64, Ulverton Road, Dalkey, Glenageary, Dublin
D07B/0257Dún Laoghaire–RathdownLodged 23 Mar 2007
- Awaiting decisionExtension
Planning Permission for two storey extension to dwellinghouse
No 27 Reenmeen Woods, Reenmeen East, Glengarriff, Co Cork
14391corkLodged 27 Jun 2014
- GrantedExtension
Permission for a two storey extension to an existing dwelling
Townley Hall Road , Tullyallen , Co. Louth
18268LouthLodged 11 Apr 2018
- GrantedExtension
Planning permission for a two storey extension to the side of existing dwelling
217, Roebuck Castle, Clonskeagh, Dublin 14
D10B/0084Dún Laoghaire–RathdownLodged 24 Feb 2010
Community
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