8 & 8a, Seafield Avenue, Blackrock, Monkstown, Co Dublin, (Protected Structure), a three-storey semi-detached house, and adjacent part single, part two storey mews cottage
Demolition of extensions and construction of a new two-storey extension at a protected structure in Blackrock.
D21A/0085 · Dun Laoghaire Rathdown County Council · Lodged 4 February 2021
- Reference
- D21A/0085
- Authority
- Dun Laoghaire Rathdown County Council
- Register status
- Decided
- Type
- Permission
- Received
- 4 February 2021
Summary
AI-generatedThe development at this three-storey semi-detached protected structure involves demolishing a non-original two-storey return and a front extension. A new two-storey pitched-roof extension will be constructed, alongside internal modifications, a new garden wall, and replacing a rear window with French doors.
- 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
Permission is sought for demolition of existing non-original two storey return , construction of a new two-storey extension with pitched roof, demolition of existing garden wall to side of main house, construction of new garden wall with gate opening to side of main house, demolition of non-original two-storey extension to front, ground floor modifications to include new concrete floor slab and associated works, replace existing arched window to rear with new timber french doors, reinstatemen...
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 31 July 2023.
Notified floor area: 32 m²
Recent sales nearby
within 500 m| Address | Date | Price | Distance |
|---|---|---|---|
| Victoria Lodge, 9 Seafield Ave, Monkstown | Jan 2025 | €2,420,000 | 14 m |
| Basement Apt, 19 Belgrave Square, Monkstown | Jan 2025 | €1,121,544 | 47 m |
| 18 Belgrave Sq North, Monkstown, Dublin | Sept 2025 | €2,120,000 | 55 m |
| 27 Belgrave Sq East, Monkstown, Dublin | Mar 2025 | €2,460,000 | 139 m |
| 13 Trafalgar Terrace, Monkstown, Dublin | Sept 2025 | €3,370,000 | 178 m |
| Ambar Lodge, Albany Avenue, Monkstown | Jun 2026 | €3,500,000 | 209 m |
| 46 Belgrave Sq West, Monkstown, Dublin | Feb 2025 | €2,620,000 | 212 m |
| 44 Belgrave Square West, Monkstown, Co Dublin | Sept 2025 | €3,400,000 | 215 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 received4 February 2021
- Decision issued26 March 2021
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 alterations to existing vehicular entrance gates including widening the existing…
8 & 8A, Seafield Avenue, Monkstown, Co Dublin, (A Protected Structure)
D21A/1117Dún Laoghaire–RathdownLodged 16 Dec 2021Alterations
- Compliance submissionAt this site
Compliance with Condition No. 2 of Reg. Ref. D21A/0085
8 & 8a, Seafield Avenue, Blackrock, Monkstown, Co Dublin, (Protected Structure), a three-storey semi-detached house, and adjacent part single, part two storey mews cottage
D21A/0085/C1Dún Laoghaire–RathdownLodged 28 Jul 2023Other
- RefusedAt this site
Retention of replacement balcony and exit stairs at rear of building on 1st floor level. This is a protected…
Victoria Lodge, 9 Seafield Avenue, Monkstown, Co. Dublin.
D02B/0537Dún Laoghaire–RathdownLodged 10 Jul 2002Retention
- GrantedAt this site
The refurbishment of a three storey semi-detached house (Protected Structure RPS 485) including the following…
9, Victoria Lodge, Seafield Avenue, Monkstown, Blackrock, Dublin, A94CX78
D25A/0446/WEBDún Laoghaire–RathdownLodged 5 Jun 2025Alterations
- InvalidAt this site
The refurbishment of a three storey semi-detached house (Protected Structure RPS 485) including the following…
Victoria Lodge, 9 Seafield Avenue, Monkstown, Blackrock, Dublin, A94CX78 (A Protected Structure)
D25A/0433/WEBDún Laoghaire–RathdownLodged 3 Jun 2025Alterations
- Refused30 m away
Outline Permission for the demolition of existing dwelling and the construction of 2 new dwellings
Erris, Belgrave Square East, Monkstown, Co Dublin
D17A/0092Dún Laoghaire–RathdownLodged 27 Apr 2017New dwelling
- Granted40 m away
Planning permission is sought for (a) demolition of existing ground floor dining room extension to rear,…
Eglinton Lodge, 6, Seafield Avenue, Monkstown, Co. Dublin
D11A/0082Dún Laoghaire–RathdownLodged 22 Feb 2011Extension
- Granted40 m away
Single storey extension to side with new pitched roof and roof glazing to existing single storey building to…
6A Seafield Mews, Seafield Avenue, Monkstown, Co. Dublin.
D03A/1131Dún Laoghaire–RathdownLodged 27 Nov 2003Extension
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 is sought for the demolition of an existing return structure and construction of new two storey…
Rockbrook House, Ballyedmonduff Road, Stepaside, Co. Dublin
D07B/0495Dún Laoghaire–RathdownLodged 31 May 2007
- GrantedExtension
Permission is sought for the demolition of the single storey rear and side extensions, the chimneys and part…
7, Woodlawn Park, Churchtown, Dublin 14
D12A/0125Dún Laoghaire–RathdownLodged 10 Apr 2012
- GrantedExtension
Permission is sought for the following: (1) Demolition of non-original single storey extension to rear, (2)…
78 Temple Road, Blackrock, Co. Dublin
D22A/0211Dún Laoghaire–RathdownLodged 28 Mar 2022
- GrantedExtension
Permission for partial demolition of front garden wall, new driveway at front of house and associated…
18 Oliver Plunkett Avenue, Dún Laoghaire, Co Dublin A96 PC04
D17A/0332Dún Laoghaire–RathdownLodged 11 Apr 2017
- RefusedExtension
Permission for the demolition of an existing single storey extension to rear of existing house and…
Adavoyle, Sandyford Road, Dundrum, Dublin 16
D14A/0484Dún Laoghaire–RathdownLodged 29 Jul 2014
- GrantedExtension
Permission for the demolition of an existing singe storey extension to rear of existing house and…
Adavoyle, Sandyford Road, Dundrum, Dublin 16
D14A/0787Dún Laoghaire–RathdownLodged 17 Feb 2015
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