57 Trees Road Upper, Mount Merrion, Blackrock, County Dublin (A94 F8K7)
Widening of a vehicular entrance and construction of a small rear extension and garage conversion in Mount Merrion.
D21A/1152 · Dun Laoghaire Rathdown County Council · Lodged 23 December 2021
- Reference
- D21A/1152
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 23 December 2021
Summary
AI-generatedThe proposed development consists of widening the existing vehicular entrance to 3.5 metres. It also includes building a 5 sqm ground floor rear extension behind the garage and converting a 2 sqm portion of the garage into a bathroom.
- Floor area
- 5 m²
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 the following: a) widening of the existing vehicular entrance to 3.5m. B) the construction of a ground floor rear extension (5sq. M. ) behind the garage. C) conversion of portion 2(sqm) of the rear of the garage to a bathroom. D) all associated site and internal 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 |
|---|---|---|---|
| 35 Cedarmount Rd, Mount Merrion, Blackrock | Mar 2026 | €880,000 | 70 m |
| 71 Trees Road, Mount Merrion, Co Dublin | Aug 2025 | €1,480,000 | 74 m |
| 49 Cedarmount Rd, Mount Merrion, Blackrock | Aug 2025 | €830,000 | 101 m |
| 64 South Ave, Mount Merrion, Dublin | Mar 2026 | €1,390,000 | 111 m |
| 66 South Ave, Mount Merrion, Dublin | Feb 2025 | €1,255,000 | 122 m |
| 21 Cedarmount Rd, Mount Merrion, Dublin | Nov 2025 | €910,000 | 123 m |
| 52 Cedarmount Road, Mount Merrion, Co Dublin | Nov 2025 | €1,000,000 | 136 m |
| 43 Trees Road, Mount Merrion, Co Dublin | Nov 2025 | €1,300,000 | 151 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 received23 December 2021
- Decision issued22 February 2022
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- InvalidAt this site
Permission is being sought for alterations and additions including a two-storey pitched roofed domestic…
59, Trees Road, Mount Merrion, Co. Dublin
D09B/0140Dún Laoghaire–RathdownLodged 6 Apr 2009Extension
- GrantedAt this site
Alterations and additions to include a two storey, pitched roofed domestic extension to the rear
59 Trees Road, Mount Merrion, Co. Dublin.
D09B/0213Dún Laoghaire–RathdownLodged 20 May 2009Extension
- GrantedAt this site
The erection of a single storey extension at the rear, and an extension of the first floor bedroom over the…
55, Upper Trees Road, Mount Merrion, Co. Dublin
D08B/0572Dún Laoghaire–RathdownLodged 30 Jul 2008Extension
- Granted30 m away
Planning permission is sought for the partial demolition of the existing single storey rear extension, the…
61, Trees Road Upper, Mount Merrion, Co. Dublin
D09B/0260Dún Laoghaire–RathdownLodged 17 Sept 2009Extension
- Refused30 m away
Demolition of the existing single storey extension to the rear of the existing house and provision of a part…
61, Trees Road Upper, Mount Merrion, Co. Dublin
D07A/1478Dún Laoghaire–RathdownLodged 23 Oct 2007Extension
- Granted30 m away
Permission sought for the demolishing of the screen wall and shed to the side of the dwelling and replace it…
53, Trees Road Upper, Blackrock, Dublin
D08A/0752Dún Laoghaire–RathdownLodged 27 Jun 2008Extension
- Invalid30 m away
The development will consist of — To demolish the screen wall and shed to the side of dwelling and replace it…
53, Trees Road Upper, Mount Merrion Co. Dublin
D08A/0466Dún Laoghaire–RathdownLodged 24 Apr 2008Extension
- Granted30 m away
Demolition of an existing side flat roof extension, front porch and rear flat roof extensions and the…
50, South Avenue, Mount Merrion, Co. Dublin
D08A/1380Dún Laoghaire–RathdownLodged 18 Dec 2008Extension
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
Permission for building works as follows (a) construct single storey extension to front and rear (b)…
3, Willowfield Park, Clonskeagh, Dublin 14
D10A/0185Dún Laoghaire–RathdownLodged 8 Apr 2010
- GrantedExtension
Permission for the following (I) To construct a single-storey rear extension to dwelling, (II) To convert the…
No. 8 Coolgarten Park , Magazine Road , Cork
2443217Cork CityLodged 30 Aug 2024
- RefusedExtension
Permission for the conversion of existing garage to form part of dwelling, new first floor extension to the…
16 Seafield Crescent, Blackrock, Co Dublin
D15A/0339/E2Dún Laoghaire–RathdownLodged 20 Jun 2025
- GrantedExtension
Permission for the following: a) A single-storey, rear, ground floor extension (38sq.m). b) Conversion of the…
9 Abbey Park, Monkstown, County Dublin (A94 HR68)
D20B/0349Dún Laoghaire–RathdownLodged 2 Nov 2020
- GrantedExtension
Permission is sought for a) ground floor extension of 35 sq.m to rear, b) first floor extension of 17 sq.m to…
20, Weston Park, Churchtown, Dublin 14
D09B/0266Dún Laoghaire–RathdownLodged 23 Jun 2009
- GrantedExtension
Permission for — Conversion of existing garage into habitable rooms comprising 16 sqm
5 Whitebeam Avenue, Clonskeagh, Dublin 14
D17A/1100Dún Laoghaire–RathdownLodged 14 Dec 2017
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