5a, Knocklyon Ave, Knocklyon, DUBLIN 16
Alterations to a previously approved house to add side and rear extensions in Knocklyon.
SD25B/0433W · South Dublin County Council · Lodged 7 July 2025
- Reference
- SD25B/0433W
- Authority
- South Dublin County Council
- Register status
- Decided
- Type
- Permission
- Received
- 7 July 2025
Summary
AI-generatedPlanning permission is sought for alterations to a previously approved application (Reg Ref No. SD24A/0034) for House B. The changes include a 6 sqm first-floor side extension and a 3 sqm single-storey rear extension.
- Floor area
- 9 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
Alterations to previously approved planning application reg ref no. Sd24a/0034. The proposed alterations affect house b (5a knocklyon ave) of the previous application to include a 1st floor extension to the side (circa 6 sq/m) & a single storey extension to the rear (circa 3 sq/m) & all associated works
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 |
|---|---|---|---|
| 4 Knocklyon Avenue, Templeogue, Dublin 16 | May 2025 | €670,000 | 39 m |
| 2 Knocklyon Ave, Knocklyon Woods, Dublin 16 | Dec 2025 | €881,000 | 42 m |
| 18 Delaford Dr, Knocklyon, Dublin 16 | Jul 2026 | €655,000 | 104 m |
| 19 Knocklyon Green, Templeogue, Dublin 16 | May 2025 | €830,000 | 127 m |
| 12 Delaford Park, Dublin 16, Dublin | Nov 2025 | €720,000 | 163 m |
| 60 Knocklyon Green, Templeogue, Dublin 16 | Apr 2026 | €650,000 | 182 m |
| 35 Mount Alton, Knocklyon, Dublin 16 | Feb 2025 | €595,000 | 212 m |
| 35 Knocklyon Park, Knocklyon Woods, Templeogue Dublin 16 | Jul 2025 | €687,000 | 233 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 received7 July 2025
- Decision due1 September 2025
- Decision issued1 September 2025
- Permission expiry13 October 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
Internal and external alterations and extension to the existing property comprising: (1) alterations to the…
5, Knocklyon Avenue, Knocklyon Wood, Dublin 16
SD17B/0239South DublinLodged 6 Jul 2017Extension
- GrantedAt this site
Retention permission for the sub-division of the existing dwelling into 2 separate dwellings & for permission…
5, Knocklyon Avenue, Knocklyon, Dublin 16
SD24A/0034South DublinLodged 30 Sept 2024Retention
- Part granted, part refusedAt this site
Retention for access gates to rear and side of house; rendered finish to single storey extension to front…
5, Knocklyon Avenue, Dublin 16
SD20B/0108South DublinLodged 25 Mar 2020Retention
- RefusedAt this site
Two storey, two bedroom dwelling to the rear with a vehicular entrance and footpath dishing; associated…
5, Knocklyon Avenue, Dublin 16
SD21A/0072South DublinLodged 26 Mar 2021New dwelling
- GrantedAt this site
Alterations to existing house to include a ground floor extension to rear & side; first floor extension to…
3, Knocklyon Avenue, Dublin 16
SD21B/0649South DublinLodged 10 Mar 2022Extension
- Granted30 m away
Pedestrian access gate to the north near the front entrance door
34, Delaford Drive, Knocklyon, Dublin 16
SD03B/0485South DublinLodged 9 Feb 2004Retention
- Granted40 m away
Detached two storey, three bedroom house with shared entrance to side
23, Delaford Lawn, Knocklyon, Dublin 16
SD19A/0325South DublinLodged 17 Oct 2019New dwelling
- Granted40 m away
To demolish part of the extension to side and for proposed two storey detached house to side with new…
23, Delaford Lawn, Knocklyon, Dublin 16
SD04A/0704South DublinLodged 28 Jun 2005New 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.
- GrantedAlterations
Alterations to previously approved extension granted under Planning Ref. No. 24/60468 from a two storey…
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2560127WicklowLodged 27 Feb 2025
- InvalidExtension
Modifications to previously approved application planning application Ref. No. SD05B/0226 to consist of an…
13, Templeville Drive, Templeogue, Dublin 6W.
SD05B/0661South DublinLodged 12 Oct 2005
- Awaiting decisionAlterations
For alterations to existing grant of planning permission by An Bord Pleanála Reference Number PL.09.232097…
Lands to North of Scoil Mhuire , Clane , Co. Kildare.
1938KildareLodged 21 Jan 2019
- GrantedExtension
Modifications to previously approved planning application Ref. No. SD05B/0226 to consist of an additional…
13, Templeville Drive, Templeogue, Dublin 6W.
SD05B/0749South DublinLodged 30 Nov 2005
- GrantedExtension
Construction of single storey extensions to side & rear of existing dwelling, demolish existing porch &…
Johnsbrook , Fordstown , Kells Co. Meath
2127MeathLodged 11 Jan 2021
- GrantedAlterations
Alterations to previously approved planning application No. S01B/0376 for a ground and first floor extension…
21, Wood Dale Drive, Ballycullen View, Dublin 24
SD03B/0215South DublinLodged 8 Sept 2003
Community
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