16, Castlefield Green, Knocklyon, Dublin 16, D16C9N1
Double storey side extension, rear extension, and attic conversion to two bedrooms with dormers.
SD25B/0122W · South Dublin County Council · Lodged 10 March 2025
- Reference
- SD25B/0122W
- Authority
- South Dublin County Council
- Register status
- Decided
- Type
- Permission
- Received
- 10 March 2025
Summary
AI-generatedConstruction of a double-storey side extension, extending the existing single-storey rear extension, and converting the attic into two bedrooms with individual dormer windows. Demolition works include the existing front side boundary wall and rear extension wall.
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
For the construction of double storey side extension to existing semi-detached house, extension of existing single storey rear extension, conversion of existing attic to 2 no. Bedrooms with individual dormer windows and all associated works. Works on ground floor of double storey side extension consist of new utility area, and roller shutter door to house a vehicle securely in ground floor space and first floor consists of 2 new bedrooms with landing area. Demolition works include existing front side boundary wall and existing rear extension wall.
Land-use zoning
What this land is zoned for
“To protect and/or improve residential amenity”
National zoning type: Existing residential
Objective set by the South Dublin 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 |
|---|---|---|---|
| 3 Castlefield Grove, Knocklyon, Dublin 16 | May 2025 | €625,000 | 119 m |
| 9 Castlefield Grove, Castlefield Manor, Templeogue Dublin 16 | May 2026 | €600,000 | 133 m |
| 12 Beverly Crescent, Knocklyon, Dublin 16 | Jan 2025 | €712,500 | 216 m |
| 202 Glenvara Park, Knocklyon, Templeogue | Mar 2026 | €360,000 | 230 m |
| 24 Beverly Crescent, Knocklyon, Dublin 16 | Sept 2025 | €565,000 | 250 m |
| 23 Beverly Crescent, Templeogue, Dublin 16 | Aug 2025 | €582,500 | 259 m |
| 10 Glenlyon Crescent, Knocklyoh, Dublin 16 | Apr 2025 | €636,000 | 300 m |
| 22 Woodstown Parade, Dublin 16 | Mar 2026 | €850,000 | 302 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 received10 March 2025
- Decision due5 May 2025
- Decision issued29 April 2025
- Permission expiry9 June 2030
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
Construct a single storey extension to the side and rear of the existing dwelling, associated site works,…
16 Castlefield Green, Castlefield Manor, Knocklyon, Dublin 16.
S99B/0710South DublinLodged 6 Jun 2000Extension
- GrantedAt this site
Conversion of existing attic space comprising of modification of existing roof structure, raising of existing…
15, Castlefield Green, Dublin 16
SD23B/0336South DublinLodged 3 Aug 2023Extension
- Exempt — no permission needed30 m away
Plastering (dry dashing) of part of front elevation, side and rear elevation of dwelling
27, Castlefield Drive, Dublin 16
ED12/0030South DublinLodged 7 Aug 2012Alterations
- Granted90 m away
Conversion of attic space to non-habitable space; dormer to rear; Velux to front and all associated site…
3, Castlefield Green, Dublin 16
SD22B/0113South DublinLodged 15 Mar 2022Extension
- Granted100 m away
Conversion of attic to non-habitable storage space to include rooflights at the rear and change of existing…
12, Castlefield Way, Knocklyon, Dublin 16
SD07B/0408South DublinLodged 9 May 2007Extension
- Granted100 m away
Bathroom extension at first floor level
11 Castlefield Way, Knocklyon, Dublin 16.
S99B/0418South DublinLodged 29 Jun 1999Extension
- Granted100 m away
Conversion of attic to non-habitable storage space to include rooflights at rear and change of existing hip…
13, Castlefield Way, Knocklyon, Dublin 16
SD07B/0399South DublinLodged 8 May 2007Extension
- Granted100 m away
Partial ground floor rear extension with pitched roof over & 1 no. Velux roof light over; (2) ground floor…
9, Castlefield Way, Castlefield Manor, Knocklyon, Dublin 16
SD07B/0449South DublinLodged 24 Jul 2007Extension
Related developments
Similar applications
Ranked by what these developments actually propose, not by matching words — so you can see how comparable applications were decided.
- RefusedExtension
Construction of an extension to the side and rear, extension of the roof and conversion of the attic, to…
31, Leopardstown Drive, Blackrock, Co. Dublin
D06B/0728Dún Laoghaire–RathdownLodged 9 Aug 2006
- GrantedExtension
Construction of an extension to the side, rear and front of the property, the extension of the roof and…
31, Leopardstown Drive, Blackrock, Co Dublin
D08B/0814Dún Laoghaire–RathdownLodged 10 Dec 2008
- GrantedExtension
Two storey side extension and single storey rear extension to the semi-detached, two storey house, to include…
2, Woodside Grove, Rathfarnham, Dublin 14, D14DH76
D24A/0168Dún Laoghaire–RathdownLodged 15 Mar 2024
- GrantedExtension
Construction of a single storey extension with 2 roof lights to rear; conversion of existing garage; two…
8, St. Brigid's Drive, Clondalkin, Dublin 22
SD21B/0017South DublinLodged 14 Jan 2021
- GrantedExtension
Partial demolition of an existing single storey extension to the rear, construction of a single and two…
52, Claremont Road, Sandymount, Dublin 4
3315/18Dublin CityLodged 20 Jun 2018
- InvalidExtension
The conversion of side garage to accommodate WC, storage and utility area, the construction of a single…
14, Belgrove Park, Chapelizod, Dublin 20
WEB5123/21Dublin CityLodged 19 Nov 2021
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