18, Highthorn Park, Mounttown, Glenageary, Co. Dublin, A96Y6V9
A double-height side extension, external wall insulation, and widened entrance.
D25A/0778/WEB · Dun Laoghaire Rathdown County Council · Lodged 14 October 2025
- Reference
- D25A/0778/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 14 October 2025
Summary
AI-generatedThe development comprises a 40 sqm double-height side extension providing living space on the ground floor and a bedroom with ensuite on the first floor. It also includes external wall insulation for the entire house and a widened vehicular entrance.
- Storeys
- 2
- Floor area
- 40 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
A double height side extension comprising 20sqm living space on the ground floor and 20sqm bedroom and ensuite space on the first floor. A new first floor window to the front of the existing house. External wall insulation to the whole house. Widening of the vehicular entrance and a new pedestrian entrance in the front curtilage and all associated 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 |
|---|---|---|---|
| 18 Highthorn Park, Dun Laoghaire, Dublin | May 2025 | €810,000 | 4 m |
| 44 Highthorn Park, Dun Laoghaire, Co Dublin | Jun 2026 | €578,000 | 78 m |
| 58 Hightorn Park, Mounttown, Dun Laoghaire | May 2025 | €710,000 | 127 m |
| 1 Kill Avenue, Dun Laoghaire, Dublin | Mar 2026 | €832,000 | 159 m |
| 44mounttown Road, Monkstown, Dublin | Dec 2025 | €985,000 | 167 m |
| 15 Rochdale, Honey Park, Kill Avenue Dun Laoghaire | May 2026 | €426,000 | 171 m |
| 150 Oliver Plunkett Rd, Monkstown Farm, Dun Laoghaire | May 2025 | €552,500 | 198 m |
| 25 Fitzgerald Park Mounttown, Dun Laoghaire, Dublin | Nov 2025 | €510,000 | 202 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 received14 October 2025
- Decision due8 December 2025
- Decision issued3 December 2025
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- Granted30 m away
Permission is sought for a single storey extension and alterations to the side of an existing dwelling house,…
26, Highthorn Park, Dun Laoghaire, Co. Dublin
D12B/0277Dún Laoghaire–RathdownLodged 28 Aug 2012Extension
- Granted30 m away
Planning permission for attic conversion with dormer to rear roof to accommodate stairs to allow access to…
8 Highthorn Park, Mounttown, Glenageary, Dublin, A96R9D9
D25B/0287/WEBDún Laoghaire–RathdownLodged 22 May 2025Extension
- Granted40 m away
Permission sought for the construction of a dormer window to the rear and the installation of two velux roof…
6, Highthorn Park, Dun Laoghaire
D18B/0389Dún Laoghaire–RathdownLodged 31 Aug 2018Extension
- Granted50 m away
Permission for alterations to the attic to include 2 no. skylights to the front and 1 no. to the rear of the…
19, Glenageary Road Upper, Glenageary, Co. Dublin
D14B/0076Dún Laoghaire–RathdownLodged 6 Mar 2014Alterations
- Granted50 m away
Permission is sought for conversion of the existing attic space to a study area and storage space with dormer…
4, Highthorn Park, Dun Laoghaire, Co. Dublin
D12B/0231Dún Laoghaire–RathdownLodged 11 Jul 2012Extension
- Granted50 m away
Permission sought for alterations to the attic to include — skylights to the front and back of the house
23, Glenageary Road Upper, Glenageary, Co Dublin
D07B/0220Dún Laoghaire–RathdownLodged 5 Jul 2007Alterations
- Granted60 m away
Permission is sought for a double height side extension comprising 11.6sqm living space on the ground floor…
2 Highthorn Park, Mounttown, Glenageary, Co Dublin
D21B/0692Dún Laoghaire–RathdownLodged 17 Dec 2021Extension
- Granted60 m away
Permission is sought for a double height side extension to dwelling comprising 11.6sqm living space on the…
2, Highthorn Park, Mounttown, Glenageary, Co Dublin
D21B/0343Dún Laoghaire–RathdownLodged 8 Jul 2021Extension
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
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- GrantedExtension
Construction of a part single storey, part two storey extension to the side and rear of existing dwelling;…
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