40, Thornhill Road, Mount Merrion, Blackrock, Dublin, A94K4X0
Demolition of a conservatory and garage to build two-storey side and single-storey rear extensions in Mount Merrion.
D23A/0302 · Dun Laoghaire Rathdown County Council · Lodged 8 May 2023
- Reference
- D23A/0302
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 8 May 2023
Summary
AI-generatedThe project involves demolishing an existing conservatory and side garage. A new two-storey side extension, single-storey rear extension, and a front protruding extension will be constructed, alongside external insulation and a widened driveway.
- 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
Demolition of the single storey conservatory extension to rear and the garage and store to side to allow for the subsequent construction of a two storey extension to side and single storey extension to rear with 1 no. Rooflight. New two storey protruding extension to front. 2 no. New bay windows to front at ground floor. 2no. New projecting windows to rear at first floor level. External insulation to all external walls, modifications to existing fenestration, increase in width of existing front vehicular entrance & all associated site works to an existing two storey semi-detached house.
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 9 September 2024.
Notified floor area: 130 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| 7 Clonmore Rd, Mount Merrion, Dublin | Sept 2025 | €1,400,000 | 115 m |
| 98 Lr Kilmacud Rd, Stillorgan, Dublin | Jul 2025 | €1,187,000 | 156 m |
| 33 Clonmore Rd, Mount Merrion, Dublin | Apr 2026 | €1,425,000 | 158 m |
| 17 Dale Close, Stillorgan | Nov 2025 | €920,000 | 207 m |
| 13 Redesdale Rd, Mount Merrion, Dublin | Sept 2025 | €850,000 | 216 m |
| 28 South Ave, Mount Merrion, Dublin | Sept 2025 | €1,400,000 | 224 m |
| 24 South Ave, Mount Merrion, Dublin | Dec 2025 | €1,580,000 | 224 m |
| 10 Redesdale Rd, Mount Merrion, Co Dublin | Jun 2026 | €1,220,000 | 226 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 May 2023
- Decision due30 June 2023
- Decision issued23 June 2023
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