18, Trafalgar Lane, Blackrock, Co. Dublin, A94X299
Demolition of a rear extension and construction of a new two-storey rear extension in an Architectural Conservation Area.
D24A/0846/WEB · Dun Laoghaire Rathdown County Council · Lodged 21 October 2024
- Reference
- D24A/0846/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 21 October 2024
Summary
AI-generatedThe development consists of the demolition of an existing 11.8 sq.m. rear extension and the construction of a new 52.4 sq.m. two-storey rear extension. Works also include lowering the ground floor level, installing four rooflights, and restoring the original front stone facade.
- Floor area
- 52 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
The development will consist of: (a) the demolition of: (i) 11.8 sqm single-storey rear extension and sun room. (ii) internal partition walls to the ground floor and stairs to accommodate proposed works. (b) the construction of a 52.4 sq. M two-storey rear extension to include a kitchen-dining room and office in the ground floor and walk-in wardrobe, ensuite, master bedroom and balcony in the first floor. (c) install of nr. 4 rooflights to retained part of the pitched roof. (d) lowering of gf level by 180mm to allow levelled access. (e) front façade works including: (i) removal of non original sand and cement render and restoration of original stonework, (ii) relocation of front door to match original, (iii) replacement of windows and front door. (f) associated minor alterations and ancillary site work. The property is in an architectural conservation area.
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 |
|---|---|---|---|
| 13 Trafalgar Terrace, Monkstown, Dublin | Sept 2025 | €3,370,000 | 60 m |
| 46 Belgrave Sq West, Monkstown, Dublin | Feb 2025 | €2,620,000 | 99 m |
| 44 Belgrave Square West, Monkstown, Co Dublin | Sept 2025 | €3,400,000 | 117 m |
| 18 Belgrave Sq North, Monkstown, Dublin | Sept 2025 | €2,120,000 | 137 m |
| Basement Apt, 19 Belgrave Square, Monkstown | Jan 2025 | €1,121,544 | 144 m |
| 15 Eaton Sq, Monkstown, Dublin | Feb 2026 | €2,600,000 | 167 m |
| 13 Eaton Sq, Monkstown, Dublin | Nov 2025 | €2,000,000 | 181 m |
| Victoria Lodge, 9 Seafield Ave, Monkstown | Jan 2025 | €2,420,000 | 193 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 received21 October 2024
- Decision due13 December 2024
- Decision issued10 December 2024
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
Construction of a two storey extension to the rear of the existing dwelling consisting of 10.5 sq.metres at…
19, Trafalgar Lane, Monkstown, Co. Dublin
D06B/0100Dún Laoghaire–RathdownLodged 10 Feb 2006Extension
- GrantedAt this site
Permission consisting of widening the front door, a single storey extension to the rear, extending the…
19 Trafalgar Lane, Monkstown, Co Dublin
D15A/0197Dún Laoghaire–RathdownLodged 24 Mar 2015Extension
- GrantedAt this site
Construction of an atrium skylight to the rear of No. 16 Trafalgar Lane, Monkstown and alterations to the…
No. 16 Trafalgar Lane, Monkstown, Co. Dublin
D10A/0620Dún Laoghaire–RathdownLodged 11 Nov 2010Alterations
- RefusedAt this site
Permission for a two storey extension to rear of The Mews, 20 Trafalgar Lane, Monkstown (a protected…
20, Trafalgar Lane, Monkstown, Co Dublin
D06A/1731Dún Laoghaire–RathdownLodged 28 Nov 2006Extension
- GrantedAt this site
Refurbishment of the existing two-storey, terraced mews coach house. New two-storey extension to the rear…
16, Trafalgar Lane, Monkstown, Co. Dublin.
D04B/0868Dún Laoghaire–RathdownLodged 8 Dec 2004Extension
- GrantedAt this site
Demolition of a boundary granite wall between No. 16 Trafalgar Lane and the protected structure no. 16…
16, Trafalgar Lane, Monkstown, Co. Dublin
D03A/0046Dún Laoghaire–RathdownLodged 21 Jan 2003Alterations
- GrantedAt this site
Permission sought for a 2 storey extension to the rear of the mews (A Protected Structure), internal…
20, Trafalgar Lane, Monkstown, Co Dublin
D08A/0131Dún Laoghaire–RathdownLodged 30 Jun 2008Extension
- GrantedAt this site
For alterations and additions to existing mews dwelling including two storey extension to rear with…
15, Trafalgar Lane, Monkstown, Co. Dublin
D06B/0866Dún Laoghaire–RathdownLodged 22 Sept 2006Extension
Related developments
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Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
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