12, Saint Thomas Mead, Mount Merrion, Blackrock, Co.Dublin
Modifications and extensions to an existing house in Mount Merrion, including raising the roof and converting the garage.
D24A/0971/WEB · Dun Laoghaire Rathdown County Council · Lodged 6 December 2024
- Reference
- D24A/0971/WEB
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 6 December 2024
Summary
AI-generatedThe project involves raising the ridge level by 1.1 metres and raising the wall plate level to allow full ceiling height in the bedrooms. It also includes single-storey extensions to the front, side, and rear, and converting the existing garage into office space.
- 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
Planning permission is sought for modifications to existing house, raising ridge level by 1.1m in height and raising wall plate level to allow bedrooms have full ceiling height, this changing existing roof profile, first floor alterations increasing bedroom sizes and creating a 3rd bedroom on first floor, ground floor with complete modifications with new single storey extensions to front, side and rear of existing house, this allowing spacious rooms and down stairs bedroom. Existing garage facility to be converted into office space with new security gates at point of entry and all associated site 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.
Built — construction complete
A commencement notice records works starting on 28 May 2025.
Notified floor area: 274 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| Apartments 1-11, Fitzwilliam Court, The Rise Mount Merrion | Dec 2025 | €4,400,000 | 57 m |
| Apartment 4 Greygates, Roebuck Ave, Mount Merrionprice excludes VAT | Jan 2026 | €190,000 | 103 m |
| 12 Foster Ave, Mt Merrion, Dublin | Oct 2025 | €1,410,000 | 140 m |
| 14 St Thomas Road, Mount Merrion, Blackrock | Jul 2025 | €1,750,000 | 153 m |
| 5 Greygates, Stillorgan Road, Mount Merrion | Jun 2025 | €1,690,000 | 177 m |
| Apt 100, Belfield Park, Stillorgan Road | Jan 2026 | €465,000 | 200 m |
| 47 Belfield Park, Stillorgan Rd, Dublin | Dec 2025 | €380,000 | 239 m |
| 36 Turnstone, Thorn Wood, Booterstown Ave | Apr 2025 | €650,000 | 263 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 December 2024
- Decision due7 February 2025
- Decision issued5 February 2025
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
Planning permission is sought for modifications to existing house, raising ridge level by 1.1m in height and…
12, Saint Thomas Mead, Mount Merrion, Blackrock, Dublin, A94DX38
D24B/0423/WEBDún Laoghaire–RathdownLodged 5 Oct 2024Alterations
- Compliance submissionAt this site
Compliance with Condition No.2 of Reg Ref No.D24A/0972/WEB
12, Saint Thomas Mead, Mount Merrion, Blackrock, Co.Dublin
D24A/0971/WEB/C1Dún Laoghaire–RathdownLodged 1 Jul 2025Other
- Compliance submissionAt this site
Compliance with Condition No.2 of Reg Ref No.D24A/0971/WEB
12, Saint Thomas Mead, Mount Merrion, Blackrock, Co.Dublin
D24A/0971/WEB/C2Dún Laoghaire–RathdownLodged 14 Oct 2025Other
- GrantedAt this site
Demolition of an existing free-standing single-storey car garage and a single storey 'lean-to' at the rear of…
The Beeches, Saint Thomas' Road, Mount Merrion, Co. Dublin.
D05B/0712Dún Laoghaire–RathdownLodged 30 Sept 2005Extension
- Refused40 m away
Permission sought for a 2.0m high pedestrian gate at site boundary to The Rise with an uncovered entry lobby…
1, The Rise, Mount Merrion, Co Dublin
D08A/0125Dún Laoghaire–RathdownLodged 7 Feb 2008Alterations
- Refused40 m away
Detached dormer bungalow and driveway at the side
1 St Thomas Mead, Mount Merrion, Co Dublin.
D03A/1120Dún Laoghaire–RathdownLodged 19 Nov 2003New dwelling
- Granted40 m away
Permission for (1) The removal of the existing 16 sq. m single-storey living room extension at rear, (2)…
1, The Rise, Mount Merrion, Co. Dublin
D05B/0600Dún Laoghaire–RathdownLodged 5 Aug 2005Extension
- Granted40 m away
Permission is sought for the construction of a 2 storey house with attic accomodation and associated…
1, The Rise, Mount Merrion, Co. Dublin
D06A/1841Dún Laoghaire–RathdownLodged 12 Dec 2006New 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.
- InvalidAlterations
Planning permission is sought for modifications to existing house, raising ridge level by 1.1m in height and…
12, Saint Thomas Mead, Mount Merrion, Blackrock, Dublin, A94DX38
D24B/0423/WEBDún Laoghaire–RathdownLodged 5 Oct 2024
- GrantedExtension
Planning permission is sought for first floor extension over existing garage for bedroom use, garage…
20 Greentrees Drive, Perrystown, Dublin 12
SD25B/0280WSouth DublinLodged 18 May 2025
- Awaiting decisionExtension
Permission is sought for the construction of a new porch at the front of the existing dwelling, two one…
18 Elm Lawn , Muskerry Estate , Ballincollig
2544196Cork CityLodged 25 Sept 2025
- GrantedAlterations
Permission sought for alterations and additions to existing house to include new vehicular entrance to front…
42, Glasanaon Road, Finglas East, Dublin 11
2866/21Dublin CityLodged 1 Jun 2021
- GrantedExtension
Permission for retention of existing garage, study, utility and toilet facilities single-storey building…
Lissadell , 8 Sli Gartan , Iona Park
2342054Cork CityLodged 2 Jun 2023
- GrantedExtension
Permission is sought the construction of single storey extensions to sides of existing dwelling consisting of…
Woodfield, Westminister Road, Dublin 18.
D10B/0335Dún Laoghaire–RathdownLodged 26 Jul 2010
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