5 Chestnut Road, Mount Merrion, Blackrock, Co Dublin A94 X821
Removal of a detached garage to build a single-storey extension and an attic conversion with a new dormer window.
D18B/0054 · Dun Laoghaire Rathdown County Council · Lodged 5 February 2018
- Reference
- D18B/0054
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 5 February 2018
Summary
AI-generatedThe development involves removing an existing detached garage and outhouses. A new single-storey extension will be built to the north and east of the house, alongside an attic conversion featuring a new dormer window and roof lights.
- 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 for the removal of existing detached garage and outhouses and the construction of a single storey extension to north and east of existing dwelling with roof lights, attic conversion with new dormer window to north, new roof lights to north, east and south elevations 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.
Built — construction complete
A commencement notice records works starting on 17 May 2018.
Notified floor area: 98.11 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 45 Greenfield Rd, Mount Merrion, Dublin | Nov 2025 | €1,390,000 | 132 m |
| 49 The Rise, Mount Merrion, Blackrock | Sept 2025 | €1,305,000 | 164 m |
| 33 North Avenue, Mount Merrion, Blackrock | Sept 2025 | €2,365,000 | 188 m |
| 18 Greenfield Road, Mount Merrion, Blackrock | Oct 2025 | €1,350,000 | 201 m |
| 14 St Thomas Road, Mount Merrion, Blackrock | Jul 2025 | €1,750,000 | 217 m |
| 32 St Thomas Rd, Mount Merrion, Dublin | Mar 2025 | €1,900,000 | 223 m |
| Apartment No. 7, Greysgate Hall, Mount Merrion | Jan 2025 | €640,000 | 228 m |
| 57 Wilson Road, Mount Merrion, Blackrockprice excludes VAT | Nov 2025 | €1,563,880 | 238 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 February 2018
- Decision issued28 March 2018
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- InvalidAt this site
Demolition of the rear outbuilding and construction of a 2-storey extension to the side, 36sqm to the ground…
7, Chestnut Road, Mount Merrion, Dublin, A94V622
D23B/0553Dún Laoghaire–RathdownLodged 30 Nov 2023Extension
- GrantedAt this site
The demolition of the rear outbuilding and construction of a 2-storey extension to the side; 36sqm to the…
No 7 Chestnut Road, Mount Merrion, Co. Dublin
D24A/0080Dún Laoghaire–RathdownLodged 10 Apr 2024Extension
- GrantedAt this site
Planning application is sought. The development will consist of: (i) demolition of the existing shed; (ii)…
7 Chestnut Road, Mount Merrion, Blackrock, Co. Dublin, A94V622
D20A/0458Dún Laoghaire–RathdownLodged 22 Sept 2020Extension
- Exempt — no permission needed40 m away
Single story extension to rear of existing dwelling with 'PRE 63' garage conversion with a first floor…
2 The Close, Mount Merrion, Blackrock, Dublin, A94 NX27
REF15924Dún Laoghaire–RathdownLodged 22 Jan 2025Extension
- Granted40 m away
Demolition of existing single-storey extension to side, construction of 2-storey extension to side and rear,…
4 The Close, Mount Merrion, Co. Dublin
D07B/0771Dún Laoghaire–RathdownLodged 27 Aug 2007Extension
- Granted40 m away
A two storey extension to side of dwelling with alterations to existing dwelling and a single storey family…
39, The Rise, Mount Merrion, Co. Dublin
D08A/0638Dún Laoghaire–RathdownLodged 3 Jun 2008Extension
- Refused40 m away
Permission is sought for alteration to a previous grant of permission (Reg. Ref. D08A/0638) to include use of…
39 The Rise, Mount Merrion, Co Dublin
D09A/0326Dún Laoghaire–RathdownLodged 11 May 2009Change of use
- Granted50 m away
(a) the change of use of that part of the ground floor currently in use as domestic residence to retail use,…
31, The Rise, Mount Merrion, Co. Dublin
D05A/0456Dún Laoghaire–RathdownLodged 12 Apr 2005Change of use
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 for the demolition of the existing separate garage and the construction of a single storey…
26 Thornhill Road, Mount Merrion, Co Dublin
D15B/0087Dún Laoghaire–RathdownLodged 24 Mar 2015
- GrantedExtension
Permission for the demolition of the existing garage and the existing single storey rear extension, provision…
47 Woodlawn Park, Churchtown, Dublin 14
D19B/0145Dún Laoghaire–RathdownLodged 21 Mar 2019
- GrantedExtension
Permission for alterations and extension to existing house, including demolition of existing side garage and…
35 Woodlawn Park, Churchtown, Dublin D14 RF25
D18B/0485Dún Laoghaire–RathdownLodged 6 Nov 2018
- GrantedExtension
Permission for construction of a single storey garage extension to the side of the dwelling house, new front…
No. 11 Páirc Na gCrann, Rathgaggan, Glanworth, Co.Cork
225436corkLodged 20 Jun 2022
- GrantedExtension
Permission for the construction of extensions to sides and rear of an existing dwelling; alterations to…
Robin Hill , Woodhill Park , Tivoli
2039189Cork CityLodged 20 Mar 2020
- GrantedExtension
Permission for demolition of adjoined garage to side of dwelling, proposed new front living room extension to…
56, Westbrook Road, Dundrum, Dublin 14
D14B/0062Dún Laoghaire–RathdownLodged 3 Mar 2014
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