81, South Avenue, Mount Merrion, Blackrock, Co. Dublin, A94H1K0
First-floor side extension and attic conversion with a rear dormer window in Mount Merrion.
D26B/0242/WEB · Dun Laoghaire Rathdown County Council · Lodged 16 March 2026
- Reference
- D26B/0242/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 16 March 2026
Summary
AI-generatedThe development consists of a first-floor side extension built over an existing ground-floor playroom and utility room. It also includes converting the attic storage space to habitable space, adding a new rear dormer window, and installing new rooflights.
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 development will consist of (a) first floor side extension over existing ground floor playroom/utility, (b) conversion of attic storage space to habitable space, (c) new dormer window to rear of existing/extended roof, (d) new rooflights to front and side of existing/extended roof, (e) all associated internal works, drainage, and site service works.
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 |
|---|---|---|---|
| 66 South Ave, Mount Merrion, Dublin | Feb 2025 | €1,255,000 | 57 m |
| 64 South Ave, Mount Merrion, Dublin | Mar 2026 | €1,390,000 | 63 m |
| 43 Trees Road, Mount Merrion, Co Dublin | Nov 2025 | €1,300,000 | 106 m |
| 49 Cedarmount Rd, Mount Merrion, Blackrock | Aug 2025 | €830,000 | 136 m |
| 56 Glenabbey Rd, Mount Merrion, Dublin | Jan 2025 | €1,315,000 | 137 m |
| 31 Trees Rd, Mount Merrion, Blackrock | Nov 2025 | €1,740,000 | 152 m |
| 35 Cedarmount Rd, Mount Merrion, Blackrock | Mar 2026 | €880,000 | 180 m |
| 117 The Rise, Mount Merrion, Dublin | Mar 2025 | €1,701,001 | 187 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 received16 March 2026
- Decision due16 June 2026
- Decision issued12 June 2026
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 is sought for the conversion of the existing side garage to habitable use with the addition of a…
81, South Avenue, Mount Merrion, Blackrock, Co Dublin
D21A/0541Dún Laoghaire–RathdownLodged 11 Jun 2021Extension
- GrantedAt this site
Permission for development. Development will consist of the construction of a new dormer window to the rear…
83, South Avenue, Mount Merrion, Co. Dublin
D18B/0206Dún Laoghaire–RathdownLodged 4 May 2018Extension
- GrantedAt this site
For proposed demolition of existing garage and construction of two storey extension to side single storey at…
83, South Avenue, Mount Merrion, Co. Dublin
D05B/0076Dún Laoghaire–RathdownLodged 10 Feb 2005Extension
- GrantedAt this site
Permission sought for replacement of existing front door entrance portico with a tiled pitched roof canopy…
77, South Avenue, Mount Merrion, Co Dublin
D07B/0166Dún Laoghaire–RathdownLodged 27 Feb 2007Alterations
- GrantedAt this site
Permission is sought for development consisting of partial demolition of rear single storey external…
77 South Avenue, Mount Merrion, Blackrock, County Dublin
D20A/0812Dún Laoghaire–RathdownLodged 5 Nov 2020Extension
- GrantedAt this site
Retention permission is sought for development consisting of the demolition of existing entrance canopy and…
77 South Avenue, Mount Merrion, Blackrock, County Dublin
D22B/0156Dún Laoghaire–RathdownLodged 28 Mar 2022Retention
- GrantedAt this site
Permission is sought for development consisting of first floor extension and associated alterations to…
77 South Avenue, Mount Merrion, Blackrock, County Dublin
D20A/0453Dún Laoghaire–RathdownLodged 4 Sept 2020Extension
- Granted40 m away
Demolition of existing two storey dwelling and construction of detached three storey split level 4 bedroom…
87, South Avenue, Mount Merrion, Co. Dublin
D08A/1137Dún Laoghaire–RathdownLodged 10 Oct 2008New dwelling
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
The development will consist of the construction of an extension to the side at first floor and an extension…
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The development will consist of — the construction of a new first-floor side extension over the existing…
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