12A, Northumberland Avenue, Dun Laoghaire, Dublin, A96HY76
Extension and conversion of a one-bedroom house into a two-bedroom house.
D23B/0296 · Dun Laoghaire Rathdown County Council · Lodged 20 June 2023
- Reference
- D23B/0296
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 20 June 2023
Summary
AI-generatedThe development involves demolishing the rear of the existing 63 sqm house and coal sheds to build a two-storey rear extension. It also includes a front dormer attic conversion to create a 100 sqm two-bedroom home.
- Residential unit
- 1
- Storeys
- 2
- Floor area
- 100 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 the conversion of the existing 63 sqm 1-bedroom house into a 100 sqm 2-bedroom house via the demolition of the rear of the existing house, construction of a 2- storey rear extension, and dormer attic conversion to the front, along with associated site works - including the demolition of existing coal sheds
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 |
|---|---|---|---|
| 15 Northumberland Ave, Dun Laoghaire, Dublin | May 2025 | €1,250,000 | 46 m |
| 21a Mulgrave St, Dun Laoghaire, Dublin | Feb 2026 | €840,000 | 64 m |
| 8 Northumberland Ave, Dun Laoghaire, Dublin | Feb 2025 | €1,100,000 | 64 m |
| 30 Mulgrave St, Dun Laoghaire, Dublin | Nov 2025 | €1,800,000 | 81 m |
| 34 Northumberland Avenue, Dunlaoughaira, Co Dublin | Dec 2025 | €1,900,000 | 92 m |
| 63 Mulgrave Street, Dun Laoghaire, Co. Dublin | Oct 2025 | €765,000 | 94 m |
| 32 Mulgrave St, Dun Laoghaire, Dublin | Jul 2025 | €880,000 | 96 m |
| 85/86 Patrick Street, Dun Laoghaire, Co. Dublin | Mar 2025 | €417,500 | 107 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 received20 June 2023
- Decision due14 August 2023
- Decision issued11 August 2023
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- RefusedAt this site
Permission is sought for the conversion of the existing 63 sqm 1 bedroom house into a 119 sqm 3-bedroom house…
12A, Northumberland Avenue, Dun Laoghaire, Co Dublin
D21B/0252Dún Laoghaire–RathdownLodged 21 May 2021Extension
- InvalidAt this site
Conversion of the existing 63sqm 1-bedroom house into a 100sqm 2-bedroom house via the construction of a…
12A, Northumberland Avenue, Dun Laoghaire, Dublin, A96HY76
D23B/0164Dún Laoghaire–RathdownLodged 11 Apr 2023Extension
- GrantedAt this site
Permission for demolition of no 12B Northumberland Avenue, together with demolition and rebuilding in new…
12B Northumberland Avenue & Northumberland Hall, Northumberland Avenue, Dun Laoghaire, Co Dublin
D13A/0072Dún Laoghaire–RathdownLodged 15 Feb 2013Demolition
- GrantedAt this site
Retention of development to include — steel structures, balustrades and cladding to rear balcony
12 Northumberland Avenue, Dun Laoghaire, Dublin,
D23A/0347Dún Laoghaire–RathdownLodged 24 May 2023Retention
- GrantedAt this site
Permission for the Change of Use, refurbishment and extensions to the existing building to accommodate a…
12 Northumberland Avenue, Dún Laoghaire, Co Dublin
D19A/0152Dún Laoghaire–RathdownLodged 1 Mar 2019Apartments
- Granted30 m away
For the demolition of the existing kitchen and utility room and the construction of a new two storey…
14, Northumberland Avenue, Dun Laoghaire, Co. Dublin
D05B/0880Dún Laoghaire–RathdownLodged 6 Dec 2005Extension
- Refused30 m away
New two storey four bedroom mews house with garage using existing vehicular access to the rear. The floor…
14, Northumberland Avenue, Dun Laoghaire, Co. Dublin
D05A/0652Dún Laoghaire–RathdownLodged 25 May 2005New dwelling
- Granted30 m away
Permission for Change of Use from office use to a single residential dwelling
11 Northumberland Avenue, Dún Laoghaire, Co Dublin
D15A/0650Dún Laoghaire–RathdownLodged 12 Oct 2015Change 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 partial demolition of a garage and demolition of a coal shed and the construction of a…
6 Glenart Avenue, Blackrock, Co. Dublin A94 A3H3
D20B/0007Dún Laoghaire–RathdownLodged 20 Jan 2020
- GrantedExtension
Permission to — Construct a single storey extension to the side and rear of existing dwelling house,…
65 Tyrconnell Park, Inchicore, Dublin 8, D08 TDC9
WEB2730/24Dublin CityLodged 16 Dec 2024
- GrantedExtension
Planning permission is sought for demolition of existing single storey rear return, coal shed and side…
1, Adelaide Villas, Adelaide Road, Glenageary, Co. Dublin
D10B/0312Dún Laoghaire–RathdownLodged 13 Jul 2010
- InvalidExtension
Permission for alterations and extensions to include the construction of a single-storey extension to the…
11, Rory O'Connor Park, Dun Laoghaire, Dublin, A96PT67
D24A/0414Dún Laoghaire–RathdownLodged 10 Jun 2024
- GrantedExtension
Permission for the demolition of existing single storey lean-to extension and coal shed to rear and chimney…
27 Boyle O'Reilly Terrace , Drogheda , Co Louth
211484LouthLodged 15 Dec 2021
- GrantedExtension
Permission sought for demolition of existing single-storey shed at side of existing house and construction of…
82, Loreto Avenue,Rathfarnham, Dublin 14
D10B/0105Dún Laoghaire–RathdownLodged 10 Mar 2010
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