134 Mount Merrion Avenue, Blackrock, Co. Dublin, A94F2Y6
Demolition of a greenhouse and construction of a single-storey rear extension to accommodate a family member flat.
D25B/0576/WEB · Dun Laoghaire Rathdown County Council · Lodged 11 October 2025
- Reference
- D25B/0576/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 11 October 2025
Summary
AI-generatedThe project involves the demolition of an existing greenhouse at the rear of the property. A new single-storey, pitched-roof extension will be built to serve as a family member flat. The works will also include internal and elevational alterations to the rear of the existing dwelling.
- 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
- Demolition of the existing greenhouse
- Construction of a single-storey, pitched-roof extension to the rear of the existing dwelling to accommodate a family member flat
- Internal and elevational alterations to the rear of the existing dwelling
- Landscaping, drainage, and all associated site 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 |
|---|---|---|---|
| 26 Ashurst, Mount Merrion Ave, Blackrock | Aug 2025 | €510,500 | 119 m |
| Apt 6, Fortwilliam, Mount Merrion Ave | Jun 2025 | €460,000 | 120 m |
| 95 Merrion Park, Blackrock, Co. Dublin | Sept 2025 | €1,120,000 | 134 m |
| 16a Woodlands Park, Blackrock, Dublin | Nov 2025 | €1,250,000 | 139 m |
| 4 Dualla Court, Stillorgan Rd, Stillorgan | Jan 2025 | €485,000 | 143 m |
| 87 Merrion Park, Hill Ave South, Blackrock | Dec 2025 | €840,000 | 150 m |
| 39 Woodlands Park, Blackrock, Co Dublin | Aug 2025 | €2,200,000 | 152 m |
| 79 Merrion Park, Blackrock, Co Dublin | Nov 2025 | €1,330,000 | 166 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 received11 October 2025
- Decision due4 December 2025
- Decision issued2 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
The proposed development will consist of: Replacement of the flat roof to the existing two storey side / part…
132, Melmore, Mount Merrion Avenue, Blackrock, Dublin, A94X9X4
D23A/0784/WEBDún Laoghaire–RathdownLodged 12 Dec 2023Extension
- Granted60 m away
Demolition of side chimney and existing side extension to ground and first floor. Provision of new ground…
5, Woodlands Park, Blackrock, Co. Dublin
D09A/0058Dún Laoghaire–RathdownLodged 7 Apr 2009Extension
- Granted60 m away
Permission for — Retention for an existing utility extension to the side of the existing dwelling
6 Woodlands Park, Mount Merrion Road, Blackrock, Co Dublin
D16A/0475Dún Laoghaire–RathdownLodged 30 Jun 2016Extension
- Granted60 m away
Permission is sought to — Demolish parapet walls above existing roof level and demolish existing concealed…
7, Woodlands Park, Blackrock, Co. Dublin, A94V447
D26B/0158/WEBDún Laoghaire–RathdownLodged 20 Mar 2026Alterations
- Granted70 m away
Permission for demolition of single storey garage to side and utility to rear and erection of a single storey…
4, Woodlands Park, Blackrock, Co. Dublin
D18A/0556Dún Laoghaire–RathdownLodged 11 Jun 2018Extension
- Granted70 m away
Alterations to D22B/0512 to include extension of the approved porch structure to front to accomodate…
8, Woodlands Park, Blackrock, Dublin, A94Y426
D23B/0556Dún Laoghaire–RathdownLodged 1 Dec 2023Alterations
- Granted70 m away
Permission for provision of a new porch structure to front with relocation of the existing front door,…
8 Woodlands Park, Blackrock, Co. Dublin.
D22B/0512Dún Laoghaire–RathdownLodged 14 Dec 2022Extension
- Granted70 m away
Permission sought to retain single storey extension to rear to provide kitchen and conservatory, new rear…
7, Woodlands Park, Mount Merrion Avenue, Dun Laoghaire, Co Dublin
D07B/0167Dún Laoghaire–RathdownLodged 27 Feb 2007Retention
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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The development will consist of the demolition of the existing greenhouse, alterations to the existing garage…
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27, Lisle Road, Crumlin, Dublin 12, D12 Y2R8
WEB1583/20Dublin CityLodged 24 Aug 2020
- GrantedExtension
Permission for alterations and extensions to an existing dwellinghouse, to consist of (a) demolition of an…
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- GrantedRetention
Permission for retention of; i) erection of greenhouse; ii) removal of hedge and provision of a temporary…
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225638corkLodged 13 Jul 2022
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