9 Mount Merrion Avenue, Blackrock, County Dublin, A94 R7D6 a protected structure
A small bay window extension to a protected structure.
D21A/1153 · Dun Laoghaire Rathdown County Council · Lodged 22 December 2021
- Reference
- D21A/1153
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 22 December 2021
Summary
AI-generatedPermission is sought for a 6 square metre metal-roofed bay window extension to a protected structure. The extension will replace an existing non-original terrace, with obscured glazing on side-facing windows to prevent overlooking.
- Floor area
- 6 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 works, consisting of a 6m2 metal-roofed bay window extension in the location of an existing (non-original) terrace. Door and windows facing the boundaries to nos 7 and 11 mount merrion avenue will be obscured to prevent overlooking.
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 3 March 2023.
Notified floor area: 6 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| Apt 17 Westfield, Sion Hill, Blackrock Dublin | Jul 2025 | €476,000 | 71 m |
| 11 Westfield, Sion Hill, Blackrocknot full market price | Jun 2026 | €211,218 | 81 m |
| 2 Sydney Mews, Sydney Avenue, Blackrock | Jun 2025 | €1,300,000 | 107 m |
| 2 Rock Road Place, Blackrockprice excludes VAT | Oct 2025 | €1,387,665 | 108 m |
| 31 Castledawson, Sion Hill Rock Road, Blackrock | May 2026 | €620,000 | 124 m |
| 25 Castledawson, Sion Hill, Blackrock | Sept 2025 | €549,000 | 134 m |
| Apt 29 Lisalea, Frascati Park, Blackrock | Aug 2025 | €515,000 | 150 m |
| 20 Lisalea, Frascati Park, Blackrock | Jul 2026 | €502,290 | 150 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 received22 December 2021
- Decision issued23 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
For single storey and part two storey addition to rear and alterations (A Protected Structure)
11, Mount Merrion Avenue, Blackrock, Co. Dublin
D05A/1073Dún Laoghaire–RathdownLodged 17 Aug 2005Extension
- RefusedAt this site
Single storey and part part two storey addition to rear and alterations. A Protected Structure
11, Mount Merrion Avenue, Blackrock, Co. Dublin.
D04A/1542Dún Laoghaire–RathdownLodged 22 Dec 2004Extension
- GrantedAt this site
Revert existing bathroom on first floor back to a bedroom and form new bathroom and en-suite in large bedroom…
11 Mount Merrion Avenue, Blackrock, Co. Dublin.
D02B/0118Dún Laoghaire–RathdownLodged 8 Mar 2002Alterations
- GrantedAt this site
The development will consist of — Formation of a car port to the end of the rear garden including PV panels…
5, Mount Merrion Avenue, Blackrock, Dublin, A94W9P2 (Protected Structure)
D26A/0302/WEBDún Laoghaire–RathdownLodged 26 Mar 2026Alterations
- GrantedAt this site
Single storey pavilion of approximately 20sq.m to rear garden. (Protected Structure)
5, Mount Merrion Avenue, Blackrock, Co. Dublin
D08A/1247Dún Laoghaire–RathdownLodged 14 Nov 2008Extension
- Granted30 m away
Retention of a single storey 29.7 sq. meter bedroom and conservatory extension to the rear. (A Protected…
15, Mount Merrion Avenue, Blackrock, Co. Dublin.
D04A/0449Dún Laoghaire–RathdownLodged 26 Apr 2004Retention
- Granted40 m away
Demolition and replacement of existing external stairs, and deck to the rear of the property, (a protected…
17, MOUNT MERRION AVENUE, BLACKROCK, CO. DUBLIN
D04A/1185Dún Laoghaire–RathdownLodged 11 Oct 2004Alterations
- Granted40 m away
Incorporating existing garage and loft to provide study on the ground floor with bedroom and shower over…
The Mews, 3A Mount Merrion Avenue, Blackrock, Co. Dublin
D14B/0282Dún Laoghaire–RathdownLodged 5 Aug 2014Extension
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
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D13B/0213Dún Laoghaire–RathdownLodged 18 Jun 2013
- GrantedExtension
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Permission is sought for development. The development consists of: (i) removal of non-original existing…
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D21A/0593Dún Laoghaire–RathdownLodged 28 Jun 2021
- GrantedExtension
Permission for one-storey projecting bay window combined with porch/canopy and renovation of existing dormer…
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D19B/0003/E1Dún Laoghaire–RathdownLodged 27 Feb 2026
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