6, St. Joseph's Cottages, Blackhorse Avenue, Castleknock, Dublin 7
Construction of a first-floor rear extension to a cottage in Castleknock.
WEB1066/25 · Dublin City Council · Lodged 15 January 2025
- Reference
- WEB1066/25
- Authority
- Dublin City Council
- Register status
- Decided
- Type
- Permission
- Received
- 15 January 2025
Summary
AI-generatedPlanning permission is sought for a first-floor extension of approximately 36.1 square meters. The new structure will be built over an existing single-storey rear extension to provide a new bedroom and bathroom.
- Storeys
- 2
- Floor area
- 36 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
The construction of a first floor extension (c. 36.1m. Sq. ) over existing single storey extension to the rear of the main dwelling comprising new bedroom and bathroom along with all other ancillary site works.
Land-use zoning
What this land is zoned for
“To protect, provide and improve residential amenities.”
National zoning type: Existing residential
Objective set by the 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 |
|---|---|---|---|
| 2 St Josephs Cottages, Blackhorse Ave, Dublin 7 | Oct 2025 | €360,000 | 45 m |
| 1 woodlands cotage, Blackhorse Avenueprice excludes VAT | May 2026 | €654,185 | 74 m |
| 18 Darling Est, Navan Rd, Dublin 7 | May 2025 | €560,000 | 128 m |
| 13a Darling Estate, Navan Road, Dublin | Jul 2025 | €763,000 | 169 m |
| 14 The Paddock, Blackhorse Ave, Dublin 7 | Jan 2026 | €640,000 | 183 m |
| 4 Ormond Terrace, Blackhorse Ave, Dublin 7 | Nov 2025 | €757,500 | 198 m |
| 2 Darling Est, Navan Rd, Dublin 7not full market price | May 2026 | €50,000 | 222 m |
| 371 Navan Rd, Dublin 7, Dublin | Apr 2025 | €620,000 | 223 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 received15 January 2025
- Decision due11 March 2025
- Decision issued7 March 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
The erection of a first floor extension (gross internal area 40sqm approximately) over existing single storey…
6 St. Joseph's Cottages, Blackhorse Avenue, Castleknock, Dublin 7
WEB2905/25Dublin CityLodged 18 Aug 2025Extension
- GrantedAt this site
To open the front boundary wall to create a new vehicular entrance providing off street parking and…
13 Martin Grove, Blackhorse Avenue, Dublin 7, D07 V6H7
WEB2636/25Dublin CityLodged 9 Jul 2025Alterations
- InvalidAt this site
Permission for roof windows to front roof with ancillary works
10 St. Vincent's Cottages, Blackhorse Avenue, Dublin 7
3109/24Dublin CityLodged 29 Jan 2024Alterations
- GrantedAt this site
The erection of a first floor extension (gross internal area 40sqm approximately) over existing single storey…
6 St. Joseph's Cottages, Blackhorse Avenue, Castleknock, Dublin 7
WEB2938/25Dublin CityLodged 22 Aug 2025Extension
- Granted30 m away
PROTECTED STRUCTURE: Permission to carry out works to a Protected Structure (RPS No. 6750). The development…
Teacher's Residence, Phoenix Park School, North Road, Phoenix Park, Dublin 8, D08 E7E5
2592/21Dublin CityLodged 15 Apr 2021Alterations
- Invalid50 m away
For the construction of a two storey extension (c.74.2m.sq.) to the rear of the existing single storey…
2 St. Joseph's Cottages, Blackhorse Avenue, Dublin 7
WEB5833/25Dublin CityLodged 1 Dec 2025Extension
- Withdrawn50 m away
For the construction of a two storey extension (c.74.2m.sq.) to the rear of the existing single storey…
2 Saint Joseph's Cottages, Blackhorse Avenue, Dublin 7
WEB5827/25Dublin CityLodged 29 Nov 2025Extension
- Granted50 m away
For the construction of a two storey extension (c.74.2m.sq.) to the rear of the existing single storey…
2 Saint Joseph's Cottages, Blackhorse Avenue, Dublin 7
WEB5851/25Dublin CityLodged 2 Dec 2025Extension
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 construction of a new first floor extension to the side and rear of the property (circa 29.5 sq.m) to…
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SD25B/0490South DublinLodged 13 Aug 2025
- RefusedExtension
The construction of a first floor rear extension on top of the existing ground floor extension, internal…
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D25B/0650Dún Laoghaire–RathdownLodged 18 Nov 2025
- GrantedExtension
The construction of a first floor extension to the rear and side of existing dwellinghouse, alterations to…
No. 16 Amberley Lawn, Grange, Douglas, Co. Cork
174673corkLodged 22 Mar 2017
- GrantedExtension
Construction of a single storey extension to front and rear of dwelling and first floor extension over…
45, Tymon Crescent, Old Bawn, Dublin 24
SD19B/0321South DublinLodged 13 Aug 2019
- GrantedExtension
The construction of an extension to the side & rear of existing house at first floor level, internal…
14 Bellewood , Ballyneety , Co. Limerick
22442LimerickLodged 20 Apr 2022
- GrantedExtension
Construction of a first floor extension to the side of existing dwelling to provide additional bedroom, a…
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