2 Highthorn Park, Mounttown, Glenageary, Co Dublin
A double-height side extension and a new front window.
D21B/0692 · Dun Laoghaire Rathdown County Council · Lodged 17 December 2021
- Reference
- D21B/0692
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 17 December 2021
Summary
AI-generatedThe development consists of a double-height side extension providing 11.6 sqm of ground-floor living space and an 11.6 sqm first-floor bedroom. A new first-floor window will also be added to the front of the house.
- Storeys
- 2
- Floor area
- 23 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 is sought for a double height side extension comprising 11.6sqm living space on the ground floor and 11.6sqm bedroom space on the first floor. Also, a new first floor window to the front of the existing 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.
Built — construction complete
A commencement notice records works starting on 10 January 2023.
Notified floor area: 23.2 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 18 Highthorn Park, Dun Laoghaire, Dublin | May 2025 | €810,000 | 55 m |
| 44 Highthorn Park, Dun Laoghaire, Co Dublin | Jun 2026 | €578,000 | 108 m |
| 1 Kill Avenue, Dun Laoghaire, Dublin | Mar 2026 | €832,000 | 109 m |
| 44mounttown Road, Monkstown, Dublin | Dec 2025 | €985,000 | 113 m |
| 15 Rochdale, Honey Park, Kill Avenue Dun Laoghaire | May 2026 | €426,000 | 140 m |
| 58 Hightorn Park, Mounttown, Dun Laoghaire | May 2025 | €710,000 | 141 m |
| 150 Oliver Plunkett Rd, Monkstown Farm, Dun Laoghaire | May 2025 | €552,500 | 141 m |
| 25 Fitzgerald Park Mounttown, Dun Laoghaire, Dublin | Nov 2025 | €510,000 | 144 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 received17 December 2021
- Decision issued16 February 2022
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 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
- GrantedAt this site
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
- GrantedAt this site
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
- 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
- Granted50 m away
Permission for the Retention of the widened front entrance gateway and planning permission is also sought for…
3 Highthorn Park, Glenageary, Co Dublin A96 F5Y0
D18A/1153Dún Laoghaire–RathdownLodged 7 Dec 2018Retention
- Withdrawn50 m away
Permission for the installation of one District Regulation Installation (DRI) consisting of a vent stack to…
At the entrance of Highthorn Park, Monkstown, Dublin
D20A/0417Dún Laoghaire–RathdownLodged 17 Jun 2020Infrastructure
- Granted60 m away
Planning permission for dormer window to the rear and 1 Velux window to front of existing roof and associated…
9, Highthorn Park, Dun Laoghaire, Dublin, A96W9V4
D23B/0040Dún Laoghaire–RathdownLodged 7 Feb 2023Extension
- Granted60 m away
A double height side extension comprising 20sqm living space on the ground floor and 20sqm bedroom and…
18, Highthorn Park, Mounttown, Glenageary, Co. Dublin, A96Y6V9
D25A/0778/WEBDún Laoghaire–RathdownLodged 14 Oct 2025Extension
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 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 2021
- GrantedExtension
Permission for a new two-storey side extension with 1 no. bedroom, new gable-end wall with pitched roof and 3…
48 Dargle Valley, Rathfarnham, Dublin 16, D16 WC65
D22B/0276Dún Laoghaire–RathdownLodged 2 Jun 2022
- GrantedExtension
Planning permission is sought for the construction of a two storey side extension consisting of an additional…
Stonelodge, Garville Drive, Dublin 6
3854/19Dublin CityLodged 26 Aug 2019
- WithdrawnExtension
Permission is sought for the construction of a part two storey side extension, a single storey porch to the…
27, Auburn Drive, Killiney, Co. Dublin
D10B/0237Dún Laoghaire–RathdownLodged 24 May 2010
- InvalidExtension
Permission is sought for new two storey extension to the front and side of house replacing existing single -…
17, Mc Cabes Villas, Booterstown, Co. Dublin.
D08B/0328Dún Laoghaire–RathdownLodged 1 May 2008
- GrantedExtension
Permission is sought for two storey extension to side of existing house with new first floor bathroom window…
1 Glencairn Dale, The Gallops, Dublin 18
D22B/0434Dún Laoghaire–RathdownLodged 23 May 2023
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