30A, Mountbrook, Stillorgan Road, Blackrock, Co Dublin, A94TH90
Installation of new dormer windows to an existing penthouse apartment in Blackrock.
D21B/0347 · Dun Laoghaire Rathdown County Council · Lodged 6 July 2021
- Reference
- D21B/0347
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 6 July 2021
Summary
AI-generatedThe development works at the second-floor penthouse apartment consist of adding one new dormer window to the west elevation, replacing three existing rooflights with two new dormer windows on the north elevation, and replacing one rooflight with a dormer window on the east elevation.
- Storey
- 1
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 development works
- 1no new dormer window to west elevation
- 2no new dormer windows to replace 3 no existing rooflights to north elevation
- 1no new dormer window to replace existing rooflight to east elevation to existing penthouse apartment (second floor)
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 |
|---|---|---|---|
| 24 Mountbrook, Stillorgan Rd, Dublin | Jun 2026 | €375,000 | 2 m |
| 26 Mountbrook, Stillorgan Rd, Blackrock | Apr 2025 | €531,000 | 2 m |
| 4 Mountbrook, Stillorgan Rd, Blackrock | Feb 2026 | €397,000 | 63 m |
| 5 Seafield Rd, Blackrock, Dublin | Sept 2025 | €1,100,000 | 153 m |
| Newtown, Rathbride, Kildare | Dec 2025 | €360,000 | 156 m |
| 2 Carraig Mor, Seafield Road, Blackrockprice excludes VAT | Mar 2025 | €643,171 | 203 m |
| 3 Carraig Mor, Seafield Road, Blackrockprice excludes VAT | May 2026 | €722,467 | 203 m |
| 25 Fosterbrook, Booterstown, Blackrock | Jan 2025 | €940,000 | 215 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 received6 July 2021
- Decision issued26 August 2021
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
(1) 1 no. new dormer window to west elevation, (2) 2 no. new dormer windows to replace 2 no. existing…
Penthouse apartment, Block 3, Mountbrook, Stillorgan Road, Stillorgan, Co. Dublin.
D04A/0929Dún Laoghaire–RathdownLodged 17 Aug 2004Alterations
- Compliance submission60 m away
Compliance with Condition No.2 of Reg Ref No. D23B/0558
9, Seafield Crescent, Booterstown, Blackrock, Dublin, A94R762
D23B/0558/C1Dún Laoghaire–RathdownLodged 13 May 2026Other
- Granted60 m away
Permission is sought for a single storey extension to the rear kitchen annex, new dormer window to rear of…
9, Seafield Crescent, Booterstown, Co. Dublin
D21A/0271Dún Laoghaire–RathdownLodged 1 Apr 2021Extension
- Granted60 m away
Alterations and additions to D21A/0271 to include a gabled end to the main roof with an additional dormer…
9, Seafield Crescent, Booterstown, Blackrock, Dublin, A94R762
D23B/0558Dún Laoghaire–RathdownLodged 1 Dec 2023Alterations
- Refused60 m away
Extension to the rear of the existing dwelling house consisting of a games room at ground level and a sitting…
9 Seafield Crescent, Booterstown, Co Dublin
D02B/0897Dún Laoghaire–RathdownLodged 4 Dec 2002Extension
- Granted60 m away
The development will consist of Alterations and additions to previously granted permission Reg Ref: D23B/0558…
9, Seafield Crescent, Booterstown, Co. Dublin
D25B/0325/WEBDún Laoghaire–RathdownLodged 9 Jun 2025Alterations
- Granted60 m away
Permission sought for the construction of a first floor extension to the rear comprising a bedroom, bathroom…
Alma, Stillorgan Road, Blackrock, Co Dublin
D06B/1103Dún Laoghaire–RathdownLodged 21 Dec 2006Extension
- Granted70 m away
New two storey extension to the rear comprising extended living / dining area at ground floor, new bedroom,…
7, Seafield Crescent, Blackrock, Co. Dublin.
D04B/0869Dún Laoghaire–RathdownLodged 9 Dec 2004Extension
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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