6 St. Joseph's Cottages, Blackhorse Avenue, Castleknock, Dublin 7
Erection of a first-floor rear extension over an existing ground-floor extension in Castleknock.
WEB2938/25 · Dublin City Council · Lodged 22 August 2025
- Reference
- WEB2938/25
- Authority
- Dublin City Council
- Register status
- Decided
- Type
- Permission
- Received
- 22 August 2025
Summary
AI-generatedThe development consists of a first-floor extension of approximately 40sqm over an existing single-storey rear extension. It will feature front and rear dormers to accommodate a new bedroom, bathroom, stair, landing, and storage.
- Storeys
- 2
- Floor area
- 40 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 erection of a first floor extension (gross internal area 40sqm approximately) over existing single storey ground floor extension to rear of existing dwelling with front & rear dormers, to comprise new bedroom, bathroom, stair, landing & storage and 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 received22 August 2025
- Decision due16 October 2025
- Decision issued15 October 2025
- Permission expiry4 January 2031
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
- RefusedAt this site
The construction of a first floor extension (c.36.1m.Sq.) over existing single storey extension to the rear…
6, St. Joseph's Cottages, Blackhorse Avenue, Castleknock, Dublin 7
WEB1066/25Dublin CityLodged 15 Jan 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.
- InvalidExtension
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 2025
- GrantedExtension
Extension and alterations to dwelling house by the construction of a first floor over the existing ground…
Courtview, Cecilstown, Mallow, Co.Cork
144431corkLodged 4 Mar 2014
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Construction of a first floor extension to the side of existing dwelling to provide additional bedroom, a…
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156711corkLodged 1 Dec 2015
- GrantedExtension
Construction of ground floor extension to rear and side elevations, construction of two dormers in place of…
No 7 Old Gardens, Shanagarry North, Midleton, Co Cork
186845corkLodged 26 Oct 2018
- Part granted, part refusedExtension
Construction of a 1st floor extension over existing ground floor extension to rear of existing dwelling,…
54, Crumlin Road, Crumlin, Dublin 12
WEB1822/20Dublin CityLodged 17 Nov 2020
- GrantedExtension
The erection of a first floor extension over existing single storey element to front/side of existing two…
1 Oldtown Crescent , Naas , Co. Kildare.
16628KildareLodged 16 Jun 2016
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