54, Cherrygarth, Mount Merrion, Blackrock, Dublin, A94R3H9
Alterations to an existing planning permission in Mount Merrion, including small extensions to the front and rear.
D23B/0325 · Dun Laoghaire Rathdown County Council · Lodged 6 July 2023
- Reference
- D23B/0325
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 6 July 2023
Summary
AI-generatedThis application proposes changes to a previously approved permission (D20B/0378). It includes a 9.5 sqm ground floor rear extension, a 3.5 sqm first-floor master bedroom extension, roof light modifications, and general changes to windows and doors.
- Floor area
- 13 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
Alterations to existing planning permission ref d20b/0378 to include (a) alterations to ground floor layout with increase in footprint to the rear (9.5sqm) (b) alterations at first floor master bed to rear with increase in floor area and pitched roof extended oner (3.5sqm) (c) removal of projecting canopy to rear and introduction of upstand parapet wall (d) alteration to flat roof light positions to rear (e) removal of velux type roof lights in pitched roof to front and sides (f) general alterations to fenestration to rear, side and front elevations, all with associated internal alterations, drainage and external 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 |
|---|---|---|---|
| 50 Cherry Garth, Mount Merrion, Blackrock | May 2025 | €1,275,000 | 48 m |
| 14 South Avenue, Mount Merrion, Co Dublin | Sept 2025 | €920,000 | 109 m |
| 11 Cherry Garth, Mount Merrion, Dublin | Jan 2025 | €1,051,000 | 132 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrionprice excludes VAT | Jan 2025 | €1,145,374 | 136 m |
| 15 Cherry Garth, Mount Merrion, Blackrock | Apr 2025 | €1,110,000 | 136 m |
| 49 Thornhill Oaks, Cherry Garth, Mount Merrion | Dec 2025 | €1,430,135 | 140 m |
| 50 Thornhill Oaks, Cherry Garth, Mount Merrion | Sept 2025 | €1,500,000 | 141 m |
| 17 Beaufield Manor, Woodlands Ave, Stillorgan | Mar 2026 | €605,000 | 166 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 July 2023
- Decision due30 August 2023
- Decision issued28 August 2023
- Permission expiry4 October 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 sought for alteration and extension to existing house to include (a) demolition of existing side…
54, Cherrygarth, Mount Merrion, Co Dublin, A94R3H9
D20B/0378Dún Laoghaire–RathdownLodged 23 Nov 2020Extension
- GrantedAt this site
Permission for: A. Demolition of the existing (redundant) boiler flu/chimney on the east side of house. B.…
55 Cherry Garth, Mount Merrion, Co Dublin
D17A/0142Dún Laoghaire–RathdownLodged 20 Feb 2017Extension
- Granted30 m away
Permission is sought for a new single storey extension to front, new first floor bedroom over former garage…
56, Cherrygarth, Mount Merrion, Co. Dublin.
D09A/0681Dún Laoghaire–RathdownLodged 6 Nov 2009Extension
- Granted40 m away
First floor extension to front and side, garage use to be reinstated and enlarged, part single storey, part…
7, South Avenue, Mount Merrion, Co. Dublin
D05A/0047Dún Laoghaire–RathdownLodged 21 Jan 2005Extension
- Granted50 m away
Planning permission is sought for a first floor extension to side and rear, a single storey extension to…
11, South Avenue, Stillorgan, Co. Dublin
D10A/0704Dún Laoghaire–RathdownLodged 10 Mar 2011Extension
- Granted50 m away
Alterations and extension to existing house to include (a) demolition of existing rear extension and rear…
50, Cherrygarth, Mount Merrion, Co. Dublin, A94H3A8
D25B/0332/WEBDún Laoghaire–RathdownLodged 11 Jun 2025Extension
- Granted50 m away
Demolition of existing single storey detached shed to accomodate the construction of a single storey…
50, Cherrygarth, Mount Merrion, Blackrock, Dublin, A94H3A8
D23A/0665Dún Laoghaire–RathdownLodged 20 Oct 2023Extension
- Refused50 m away
Permission for the demolition of existing single storey detached shed to accommodate the construction of a…
50, Cherrygarth, Mount Merrion, Blackrock, Co. Dublin, A94H3A8
D23A/0402Dún Laoghaire–RathdownLodged 23 Aug 2023Extension
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