12 Mount Merrion Avenue, Blackrock, Co. Dublin
Extensions, a basement store, and front step reconstruction at a protected structure.
D09A/0403 · Dun Laoghaire Rathdown County Council · Lodged 5 June 2009
- Reference
- D09A/0403
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 5 June 2009
Summary
AI-generatedPlanning permission is sought for alterations to a protected structure, including a new single and two-storey rear extension with a balcony and a basement store. It also includes reconstructing the front concrete steps in cut stone and extending the front basement patio.
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 sought for alterations to rear to include construction of new single storey and two storey extension with small balcony, provision of basement store under rear car port. Cut stone reconstruction of the existing concrete steps to front with storage under, extension of open area at basement front with new cut stone steps from front garden to basement patio and associated site works at dwelling house. A protected structure.
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 |
|---|---|---|---|
| Apt 29 Lisalea, Frascati Park, Blackrock | Aug 2025 | €515,000 | 69 m |
| 20 Lisalea, Frascati Park, Blackrock | Jul 2026 | €502,290 | 69 m |
| 2 Sydney Mews, Sydney Avenue, Blackrock | Jun 2025 | €1,300,000 | 120 m |
| Apt 17 Westfield, Sion Hill, Blackrock Dublin | Jul 2025 | €476,000 | 154 m |
| 11 Westfield, Sion Hill, Blackrocknot full market price | Jun 2026 | €211,218 | 164 m |
| 2 Rock Road Place, Blackrockprice excludes VAT | Oct 2025 | €1,387,665 | 187 m |
| 31 Castledawson, Sion Hill Rock Road, Blackrock | May 2026 | €620,000 | 194 m |
| 25 Castledawson, Sion Hill, Blackrock | Sept 2025 | €549,000 | 197 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 received5 June 2009
- Decision issued30 July 2009
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- WithdrawnAt this site
Change of use to the protected structure from a single residential unit to offices on the ground and first…
10, Mount Merrion Avenue, Blackrock, Co. Dublin
D07A/1608Dún Laoghaire–RathdownLodged 16 Nov 2007Change of use
- GrantedAt this site
Permission is sought for the retention for the change of use from a single residential unit to offices to the…
10, Mount Merrion Avenue, Blackrock, Co. Dublin
D08A/0172Dún Laoghaire–RathdownLodged 13 Feb 2008Retention
- GrantedAt this site
(Protected Structure) Permission is sought for the development all at the rear of existing end-of-terrace…
Corner site of, Mount Merrion Avenue & Frascati Park, Blackrock, Co. Dublin
D07A/0991Dún Laoghaire–RathdownLodged 17 Jul 2007Alterations
- Granted50 m away
Retention Permission for a tiled roof and part flat roof enclosure of the existing garden room in place of…
Stella Maris, Frascati Park, Blackrock, Co. Dublin
D13B/0272Dún Laoghaire–RathdownLodged 2 Aug 2013Retention
- Granted50 m away
Construction of a new disabled accessible toilet at basement level to the rear of existing school buildings.…
Benicasa Special School, 1, Mount Merrion Avenue, Blackrock, Co. Dublin.
D05A/0572Dún Laoghaire–RathdownLodged 9 May 2005Alterations
- Granted50 m away
New prefabricated Speech and Language Therapy Room in the grounds. Benicasa House is a Protected Structure
Benincasa Special School, 1 Mount Merrion Avenue, Blackrock, Co Dublin
D03A/0177Dún Laoghaire–RathdownLodged 24 Feb 2003Alterations
- Granted50 m away
Widening of existing entrance and gates. Benincasa House is a Protected Structure
Benincasa Special School, 1 Mount Merrion Avenue, Blackrock, Co Dublin
D03A/0176Dún Laoghaire–RathdownLodged 24 Feb 2003Alterations
- Granted50 m away
Permission is sought for the replacement of the existing single glazed up and down sliding window sashes with…
Benincasa Special School, 1, Mount Merrion Avenue, Blackrock, Co. Dublin
D12A/0277Dún Laoghaire–RathdownLodged 27 Nov 2012Alterations
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- RefusedAlterations
Permission sought for internal alterations; new bathroom extension at top floor level at rear, new external…
30, Corrig Avenue (A Protected Stucture), Dun Laoghaire, Co Dublin
D07A/1023Dún Laoghaire–RathdownLodged 19 Jul 2007
- GrantedExtension
PROTECTED STRUCTURE: Permission is sought for: A. Two storey extension (at first and second floor level)…
39 Wellington Road, Dublin 4
3943/21Dublin CityLodged 26 Nov 2021
- GrantedAlterations
Permission for the internal refurbishment of the lower ground floor including the provision of a new external…
No. 7 Montpelier Terrace , Sea Road , Galway
17276Galway CityLodged 28 Sept 2017
- GrantedAlterations
Permission for the demolition of an existing single storey extension, wc structure and garage to the rear…
5, Tivoli Terrace North, Dun Laoghaire, Co. Dublin
D14A/0085Dún Laoghaire–RathdownLodged 23 May 2014
- GrantedExtension
Permission for works to a two storey detached dwelling with attic conversion, to include the demolition of…
The Grange, Brighton Road, Foxrock, Dublin 18 (A Protected Structure)
D16A/0441Dún Laoghaire–RathdownLodged 20 Jun 2016
- GrantedExtension
Permission is sought for a two storey extension to rear of existing dwelling, including a screened external…
2, Seafort Parade, Blackrock, Co. Dublin
D11B/0339Dún Laoghaire–RathdownLodged 12 Mar 2012
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