40 South Avenue, Mount Merrion, Blackrock, Co. Dublin, A94X5N0
First-floor front extension, attic conversion, and roof alterations in Mount Merrion.
D26B/0064/WEB · Dun Laoghaire Rathdown County Council · Lodged 3 February 2026
- Reference
- D26B/0064/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 3 February 2026
Summary
AI-generatedThe development consists of a first-floor extension to the front above the existing garage conversion, a new hipped roof, and an attic conversion with a front dormer to accommodate stairs.
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 is sought for; a) a proposed first floor extension to front, above existing garage conversion; b) a new hipped roof to new and existing first floor extensions, maintaining existing ridge height; c) attic conversion with dormer to front to facilitate access stairs; d) rooflights to side and rear, and; e) 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 |
|---|---|---|---|
| 32 South Ave, Mount Merrion, Dublin | Jan 2026 | €1,725,000 | 48 m |
| 28 South Ave, Mount Merrion, Dublin | Sept 2025 | €1,400,000 | 74 m |
| 33 Clonmore Rd, Mount Merrion, Dublin | Apr 2026 | €1,425,000 | 80 m |
| 62 Thornhill Oaks, Blackrock, Co. Dublinprice excludes VAT | Mar 2026 | €859,031 | 94 m |
| 24 South Ave, Mount Merrion, Dublin | Dec 2025 | €1,580,000 | 94 m |
| Thornhill, Cherry Garth, Mount Merrion | Aug 2025 | €1,750,000 | 99 m |
| 63 Thornhill Oaks, Blackrock, Co. Dublin | May 2026 | €870,000 | 107 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrionprice excludes VAT | Jan 2025 | €1,145,374 | 141 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 received3 February 2026
- Decision due31 March 2026
- Decision issued26 March 2026
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