14, Saint Thomas Road, Mount Merrion, Blackrock, Co. Dublin, A94 AE89
Demolition of a side and rear extension to build a new ground and first floor extension to a semi-detached house.
D25B/0626/WEB · Dun Laoghaire Rathdown County Council · Lodged 6 November 2025
- Reference
- D25B/0626/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 6 November 2025
Summary
AI-generatedThe project involves the demolition of an existing single-storey side and rear extension and outbuildings. It will be replaced with a larger ground floor extension and a new first floor extension to create a four-bedroom home.
- 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
Redevelopment of existing 2 storey 3 bedroom semi-detached house. Works to include the demolition of existing single storey extension to the side and rear (33.0 sq. M) and demolition of outbuildings. The ground floor area will be extended (58.0 sq. M) to include new kitchen / living / dining room, utility and study as well as internal revisions to the layout; the first floor area will be extended (41.6 sq. M) to create a fourth bedroom, en-suite and bathroom as well as internal revisions to the layout, including alterations to the front, side and rear elevations and all associated site works.
Built & 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 |
|---|---|---|---|
| 14 St Thomas Road, Mount Merrion, Blackrock | Jul 2025 | €1,750,000 | 9 m |
| 32 St Thomas Rd, Mount Merrion, Dublin | Mar 2025 | €1,900,000 | 139 m |
| Apartments 1-11, Fitzwilliam Court, The Rise Mount Merrion | Dec 2025 | €4,400,000 | 188 m |
| 12 Foster Ave, Mt Merrion, Dublin | Oct 2025 | €1,410,000 | 213 m |
| Apartment 4 Greygates, Roebuck Ave, Mount Merrionprice excludes VAT | Jan 2026 | €190,000 | 222 m |
| 5 Greygates, Stillorgan Road, Mount Merrion | Jun 2025 | €1,690,000 | 223 m |
| 33 North Avenue, Mount Merrion, Blackrock | Sept 2025 | €2,365,000 | 260 m |
| Apartment No. 7, Greysgate Hall, Mount Merrion | Jan 2025 | €640,000 | 293 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 received6 November 2025
- Decision due9 January 2026
- Decision issued23 December 2025
- Appeal submitted13 January 2026
- Appeal decided14 July 2026
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