48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7
First floor extension, attic conversion, and roof modifications to a house in Mount Merrion.
D26B/0323/WEB · Dun Laoghaire Rathdown County Council · Lodged 31 May 2026
- Reference
- D26B/0323/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- In progress
- Type
- Permission
- Received
- 31 May 2026
Summary
AI-generatedThe application proposes a 31.3 sq.m first-floor extension to the front, side, and rear of the dwelling. It also includes a 30 sq.m attic conversion, replacing the hipped roof with a gable end roof, adding a rear dormer, and installing a bike shed in the front garden.
- Floor area
- 61 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
A first floor extension to front, side & rear of dwelling (floor area 31.30m. Sq. ), conversion of attic space and replacement of the existing ‘hipped roof’ structure with a ‘gable end’ roof structure incorporating the raising of the first floor side wall of the dwelling, together with a dormer & windows on the rear elevation and associated internal modifications (floor area 30.0m. Sq. ), bike shed (3.0m. Sq. ) to be located in front garden and 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 |
|---|---|---|---|
| 44 Deerpark Rd, Mount Merrion, Dublin | Dec 2025 | €1,250,000 | 26 m |
| 47 Deerpark Rd, Mount Merrion, Blackrock | Mar 2025 | €800,000 | 58 m |
| 19 Wilson Rd, Mount Merrion, Dublin | Mar 2026 | €1,116,111 | 93 m |
| 24 Deerpark Road, Mount Merrion, Co Dublin | Jun 2025 | €1,270,000 | 131 m |
| 4 Wilson Crescent, Mount Merrion, Dublin | Nov 2025 | €1,210,000 | 154 m |
| 6 Wilson Crescent, Mount Merrion, Dublin | Jul 2025 | €980,000 | 159 m |
| 55 Wilson Road, Mount Merrion, Blackrockprice excludes VAT | Nov 2025 | €1,585,903 | 168 m |
| 56 Wilson Road, Mount Merrion, Blackrockprice excludes VAT | Apr 2026 | €1,475,771 | 174 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 received31 May 2026
- Decision due27 July 2026
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
The development will consist of a first floor extension to front, side & rear of dwelling (floor area…
48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7
D26B/0316/WEBDún Laoghaire–RathdownLodged 21 Apr 2026Extension
- GrantedAt this site
Retention permission for garage conversion and extra height roof on side extension. Retention for the…
50, Deerpark Road, Mount Merrion, Blackrock, Dublin, A94T9F7
D23A/0135Dún Laoghaire–RathdownLodged 28 Feb 2023Retention
- InvalidAt this site
The development will consist of: front single storey extension with 2 roof windows, Garage conversion for…
50 Deerpark Road, Mount Merrion, Blackrock, Co Dublin, A94T9F7
D22A/0851Dún Laoghaire–RathdownLodged 7 Nov 2022Extension
- Granted40 m away
Permission is sought for amendments to previously approved planning permission with ref. no. D09A/0444 for…
40 Deerpark Road, Mount Merrion, Co. Dublin
D11B/0026Dún Laoghaire–RathdownLodged 31 Jan 2011Alterations
- Granted40 m away
Pitched roofed two storey and single storey over basement residential extension with associated siteworks and…
40, Deerpark Road, Mount Merrion, Co. Dublin.
D09A/0444Dún Laoghaire–RathdownLodged 30 Sept 2009Extension
- Granted40 m away
For development consisting of rear extension (12.2 sq.m.) with replacement side garage of 16.5 sq.m.…
31, Wilson Road, Mount Merrion, Co. Dublin
D06A/0726Dún Laoghaire–RathdownLodged 4 May 2006Extension
- Granted40 m away
Planning permission and retention. Permission is sought for 3 no. new rooflights on the side pitched roofs of…
29 Wilson Road, Mount Merrion, Blackrock, Co Dublin A94 K8H2
D22A/0609Dún Laoghaire–RathdownLodged 20 Oct 2022Extension
- Granted40 m away
Planning permission is sought for a new dormer window in the roof on the front of the house. Retention…
29, Wilson Road, Mount Merrion, Dublin, A94K8H2
D25A/0790/WEBDún Laoghaire–RathdownLodged 18 Oct 2025Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- InvalidExtension
The development will consist of a first floor extension to front, side & rear of dwelling (floor area…
48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7
D26B/0316/WEBDún Laoghaire–RathdownLodged 21 Apr 2026
- GrantedExtension
Construction of a first floor extension to the side; a single storey extension to the rear; conversion of the…
12, Ballyroan Road, Rathfarnham, Dublin 16.
SD14B/0262South DublinLodged 28 Oct 2014
- GrantedExtension
Removal of existing sheds to rear of dwelling and construction of a new single single storey 38sq.m. rear…
16 Wainsfort Road, Terenure, Dublin 6W.
SD13B/0082South DublinLodged 3 Apr 2013
- GrantedExtension
Construction of an extension (30sq.m.) at first floor level to the side and rear of existing dwelling to…
73, Marian Road, Dublin 14
SD14B/0220South DublinLodged 21 Aug 2014
- GrantedExtension
Permission is being sought to construct a new single storey extension to the front of existing dwelling along…
7, Pinewood Avenue, Dublin 11
WEB1588/24Dublin CityLodged 14 May 2024
- GrantedExtension
The development consists of a single storey extension to the front of the existing house with provision of…
148, The Stiles Road, Clontarf, Dublin 3 D03 V2Y4
WEB1264/23Dublin CityLodged 29 Mar 2023
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