3, Thornhill Road, Mount Merrion, Co. Dublin
Demolition of a garage for new single and two-storey extensions in Mount Merrion.
D18B/0168 · Dun Laoghaire Rathdown County Council · Lodged 11 April 2018
- Reference
- D18B/0168
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 11 April 2018
Summary
AI-generatedThe application consists of removing an existing garage and outhouses to the side of a semi-detached dwelling. This will make way for a new single-storey extension to the rear and side, and a two-storey extension to the front and side.
- Storeys
- 2
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 for a domestic extension and alterations to existing semi-detached dwelling. The extension and alterations are comprised of: the removal of existing garage and outhouses to side; single storey extension to rear and side; two-storey extension to front and side; elevational changes; modifications to existing house; and all ancillary works.
Built & sold
What happened next
Beyond the decision: whether this development was built, and what property here has sold for.
Built — construction complete
A commencement notice records works starting on 27 August 2018.
Notified floor area: 189 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 24 South Ave, Mount Merrion, Dublin | Dec 2025 | €1,580,000 | 52 m |
| 28 South Ave, Mount Merrion, Dublin | Sept 2025 | €1,400,000 | 54 m |
| 32 South Ave, Mount Merrion, Dublin | Jan 2026 | €1,725,000 | 67 m |
| 33 Clonmore Rd, Mount Merrion, Dublin | Apr 2026 | €1,425,000 | 72 m |
| 14 South Avenue, Mount Merrion, Co Dublin | Sept 2025 | €920,000 | 109 m |
| Thornhill, Cherry Garth, Mount Merrion | Aug 2025 | €1,750,000 | 154 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrionprice excludes VAT | Jan 2025 | €1,145,374 | 155 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrion | Dec 2025 | €1,430,135 | 163 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 received11 April 2018
- Decision issued1 June 2018
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
Planning permission for a domestic extension and alterations to existing semi-detached dwelling. The…
77, Parkmore Drive, Terenure, Dublin 6W
3497/18Dublin CityLodged 13 Jul 2018
- GrantedExtension
Permission for a domestic extension and alterations to existing semi-detached dwelling. The extension and…
15, Glenabbey Road, Mount Merrion, Co. Dublin
D17A/0694Dún Laoghaire–RathdownLodged 2 Aug 2017
- GrantedExtension
Permission for alterations and extension to two storey semi-detached dwelling consisting of demolition of…
10 Ardmahon Estate , Well Road , Cork
2543693Cork CityLodged 4 Mar 2025
- GrantedExtension
Planning permission for domestic extension and alterations to existing semi-detached dwelling. The extension…
23, Landscape Avenue, Churchtown, Dublin 14
D17A/1039Dún Laoghaire–RathdownLodged 29 Nov 2017
- GrantedExtension
Permission for modification of a semi-detached dwelling by constructing a partly two storey and partly single…
25 Henley Park, Churchtown, Dublin 14
D16A/0613Dún Laoghaire–RathdownLodged 2 Nov 2016
- GrantedExtension
Permission for the renovation and extension of the existing 2-storey, semi-detached dwelling, to include the…
16 Braemor Park, Churchtown, Dublin 14
D18A/0061Dún Laoghaire–RathdownLodged 22 Jan 2018
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.