51, Sycamore Road, Mount Merrion, Blackrock, Dublin, A94K8X7
First-floor extensions to the side and rear, attic conversion, and modification of a ground floor extension.
D25A/0121/WEB · Dun Laoghaire Rathdown County Council · Lodged 18 February 2025
- Reference
- D25A/0121/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 18 February 2025
Summary
AI-generatedThe development includes modifying an existing ground floor rear extension, building first-floor extensions to the side and rear, converting the attic space with a rear dormer and seven Velux windows, and widening the vehicular entrance.
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 applicants intend to apply for permission for the development of an existing semi-detached dwelling at no. 51 sycamore road, mount merrion, blackrock, co. Dublin, a94 k8x7. The development will consist of the following principal elements
- Modification of the existing single-storey rear extension, including an additional area of 12.5 sq. M
- Construction of a first-floor bedroom extension with a pitched roof to the rear, over the single-storey rear extension
- Construction of a first-floor extension with a pitched roof to the side and rear, over the existing single-storey garage, including a dormer window to the front
- Conversion of the attic space, including the addition of dormer window to the rear and 7no. Of velux windows
- Alterations to the internal layout, main roof, and elevations, along with all associated landscaping and ancillary works
- Modifications and widening of the existing vehicular entrance off sycamore road to being 3.5m in width
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 |
|---|---|---|---|
| 29 Sycamore Road, Mount Merrion, Co Dublin | Sept 2025 | €1,785,000 | 135 m |
| 117 The Rise, Mount Merrion, Dublin | Mar 2025 | €1,701,001 | 152 m |
| 56 Trees Rd, Mount Merrion, Blackrock | Apr 2025 | €1,285,000 | 207 m |
| 31 Trees Rd, Mount Merrion, Blackrock | Nov 2025 | €1,740,000 | 216 m |
| 2 Cherrygarth, Mount Merrionprice excludes VAT | Oct 2025 | €881,057 | 241 m |
| 56 Thornhill Oaks, Mount Merrionprice excludes VAT | Mar 2025 | €775,330 | 250 m |
| 4 Cherry Garth, Mount Merrion, Blackrock | Aug 2025 | €1,650,000 | 259 m |
| 4 Dualla Court, Stillorgan Rd, Stillorgan | Jan 2025 | €485,000 | 288 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 received18 February 2025
- Decision due14 April 2025
- Decision issued10 April 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 for — Demolition of existing single storey extension to rear
53 Sycamore Road, Mount Merrion, Co Dublin
D17B/0504Dún Laoghaire–RathdownLodged 8 Nov 2017Extension
- Granted40 m away
Permission is sought for the demolition of an existing glazed conservatory and construction of a new garden…
45, Sycamore Road, Mount Merrion, Co. Dublin
D12B/0314Dún Laoghaire–RathdownLodged 3 Oct 2012Extension
- Granted50 m away
Permission is sought for demolition of existing single storey structure to rear and bay window to side; and…
50, Sycamore Road, Mount Merrion, Co. Dublin
D18B/0388Dún Laoghaire–RathdownLodged 30 Aug 2018Extension
- Granted50 m away
Permission to alter, extend and carry out ancillary contingent works, to include: A. Alterations and…
48 Sycamore Road, Mount Merrion, Co Dublin
D18A/0007Dún Laoghaire–RathdownLodged 5 Jan 2018Extension
- Granted50 m away
Single storey sun room extension to the rear, a utility, w.c. and play room to the side and the enclosure of…
19 Trees Road Lower, Mount Merrion, Co. Dublin.
D02B/0482Dún Laoghaire–RathdownLodged 21 Jun 2002Extension
- Granted60 m away
Permission for the demolition of existing single storey garage conversion, the construction of a single…
24 Trees Road Lower, Mount Merrion, Co Dublin
D16A/0092Dún Laoghaire–RathdownLodged 15 Feb 2016Extension
- Granted60 m away
Two storey extension to rear of existing dwelling and the conversion and extension of attic for use as…
11, Trees Road Lower, Mount Merrion, Co. Dublin
D04B/0225Dún Laoghaire–RathdownLodged 24 Mar 2004Extension
- Awaiting decision60 m away
The development will consist of the renovation and extension of existing 2-storey semi-detached house to…
42, Sycamore Road, Mount Merrion, Blackrock, Co. Dublin, A94Y1T0
D26B/0401/WEBDún Laoghaire–RathdownLodged 14 Jul 2026Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- InvalidAlterations
Alterations to previously granted planning (under Reg. Ref D24A/0817/WEB) for development at 8 Greenfield…
8, Greenfield Road, Mount Merrion, Blackrock, Co. Dublin, A94D2E9
D24A/1003/WEBDún Laoghaire–RathdownLodged 17 Dec 2024
- GrantedExtension
Renovations and extensions to the existing two-storey, detached house at 46 Wilson Road, Mount Merrion,…
46, Wilson Road, Mount Merrion, Blackrock, Dublin, A94E8F5
D25B/0120/WEBDún Laoghaire–RathdownLodged 6 Mar 2025
- InvalidExtension
Permission for development at 22 Woodlands Park, Mount Merrion Avenue, Blackrock, Co. Dublin, A94 PF22. The…
22, Woodlands Park, Mount Merrion Avenue, Blackrock, Co. Dublin, A94PF22
D24A/0763/WEBDún Laoghaire–RathdownLodged 24 Sept 2024
- InvalidExtension
The proposed development will consist of the demolition of the existing garage (19.6 sq.m) and external…
45, Merrion Road, Dublin 4
WEB1825/20Dublin CityLodged 17 Nov 2020
- GrantedExtension
The proposed development will consist of: Replacement of the flat roof to the existing two storey side / part…
132, Melmore, Mount Merrion Avenue, Blackrock, Dublin, A94X9X4
D23A/0784/WEBDún Laoghaire–RathdownLodged 12 Dec 2023
- GrantedExtension
Permission sought for the following works at 40 Mather Road North, Mount Merrion, Co. Dublin, A94 PR60, an…
40, Mather Road North, Mount Merrion, Blackrock, Dublin, A94PR60
D24A/0432Dún Laoghaire–RathdownLodged 14 Jun 2024
Community
Discussion
What local people think about this application.
Community sentiment
No votes yetNobody has voted on this application yet.
Community sentiment — a straw poll of people who visited this page, not a statutory submission. To make a valid observation you must submit it to the planning authority.
Sign in to have your say on this application.
No comments yet. Be the first to say what you think about this application.
Sign in to join the discussion on this application.
Comments are moderated and are the opinions of the people who wrote them. They form no part of the statutory planning process — to make a valid observation you must submit it to the planning authority.