15, Northumberland Avenue, Dun Laoghaire, Co. Dublin, A96EH42
Change of use from three apartments back to a single family home, including a new single-storey rear extension.
D25A/0943/WEB · Dun Laoghaire Rathdown County Council · Lodged 8 December 2025
- Reference
- D25A/0943/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- In progress
- Type
- Permission
- Received
- 8 December 2025
Summary
AI-generatedThe development proposes changing the use of a multi-occupancy building containing three apartments back into a single family home. Works include constructing a 23 sqm single-storey rear extension, removing an external steel stairs and walkway, and making internal layout alterations.
- Floor area
- 23 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 change of use from a multi-occupancy building containing three apartments back to a family home. The development will consist of the construction of a ground floor, single storey extension to rear with flat roof (proposed floor area approx. 23sqm), removal of steel external stairs and walkway to rear, installation of roof light in existing structure, alterations to internal layouts, replacing existing door with a window (side elevation) and all associated site wor...
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 | 7 m |
| 34 Northumberland Avenue, Dunlaoughaira, Co Dublin | Dec 2025 | €1,900,000 | 51 m |
| 30 Mulgrave St, Dun Laoghaire, Dublin | Nov 2025 | €1,800,000 | 81 m |
| 32 Mulgrave St, Dun Laoghaire, Dublin | Jul 2025 | €880,000 | 86 m |
| 8 Northumberland Ave, Dun Laoghaire, Dublin | Feb 2025 | €1,100,000 | 94 m |
| 21a Mulgrave St, Dun Laoghaire, Dublin | Feb 2026 | €840,000 | 103 m |
| The Coach House, Sydenham Mews, Corrig Avenue | Jan 2026 | €750,000 | 109 m |
| 2 Patrick Court, Patrick St, Dun Laoghaire | Apr 2026 | €572,000 | 122 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 received8 December 2025
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- GrantedAt this site
Permission is sought for alterations and additions to include (1) construction of a single storey extension…
15, Northumberland Avenue, Dun Laoghaire, Co. Dublin
D16A/0768Dún Laoghaire–RathdownLodged 4 Apr 2017Apartments
- GrantedAt this site
Planning permission is sought for replacement of upvc windows with painted hw sash windows to front…
Sonas, 16 Northumberland Avenue, Dun Laoghaire, Co Dublin, A96Y625
D22A/0706Dún Laoghaire–RathdownLodged 21 Sept 2022Extension
- RefusedAt this site
Permission for a new front garden design, car entrance and modifications of existing cast iron railings and…
16 Northumberland Avenue, Dún Laoghaire, Co Dublin
D16A/0448Dún Laoghaire–RathdownLodged 21 Jun 2016Alterations
- RefusedAt this site
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
- GrantedAt this site
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
- Granted40 m away
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
- Granted40 m away
The development will consist of: Alterations to the proposed development permitted under Register Reference…
18, Northumberland Avenue, Dun Laoghaire, Dublin, A96K793
D26A/0155/WEBDún Laoghaire–RathdownLodged 1 Mar 2026Extension
- Granted40 m away
Planning permission for — Demolition of existing flat roof extension to rear at Basement level
18, Northumberland Avenue, Dun Laoghaire, Dublin, A96K793
D24A/0551/WEBDún Laoghaire–RathdownLodged 24 Jul 2024Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- GrantedChange of use
A change of use from 3 apartments to a single dwelling, the removal of the existing rear extension, the…
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WEB2124/22Dublin CityLodged 14 Dec 2022
- InvalidChange of use
The development will consist of: a change of use from 3 apartments to a single dwelling, the removal of the…
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WEB2089/22Dublin CityLodged 5 Dec 2022
- GrantedChange of use
Permission for development at this site. The development will consist of the change of use from multiple flat…
8, Eden Park, Glasthule, Co Dublin, (A Protected Structure)
D21A/0369Dún Laoghaire–RathdownLodged 4 Aug 2021
- GrantedChange of use
Permission for — Change of Use from 6 no. apartments to single family occupancy dwelling
1 Haddington Terrace, Dún Laoghaire, Co Dublin A96 VF82 (A Protected Structure & in an Architectural Conservation Area)
D18A/1170Dún Laoghaire–RathdownLodged 13 Dec 2018
- Awaiting decisionApartments
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24190corkLodged 22 Apr 2024
- Awaiting decisionChange of use
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2560185WicklowLodged 18 Mar 2025
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