26, Mount Alton, Knocklyon, Dublin 16
Energy refurbishment and a single-storey rear extension to a semi-detached house.
ED17/0007 · South Dublin County Council · Lodged 23 January 2017
- Reference
- ED17/0007
- Authority
- South Dublin County Council
- Register status
- Decided
- Type
- Declaration of Exemption Section 5
- Received
- 23 January 2017
Summary
AI-generatedThe proposal involves a whole-house energy refurbishment and a 32sqm single-storey rear extension to an existing 92sqm semi-detached house. Works include replacing the front porch door, installing solar panels on the rear roof, and adding rooflights.
- Storey
- 1
- Floor area
- 32 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
Proposed whole - house energy refurbishment, and modest single-storey extension (32sqm) to rear of existing 1970's single-storey two bed semi-detached house (92sqm), to form a high quality and thermally efficient three-bed family home. Works to include the replacement of existing sliding entrance porch door (2sqm) with new insulated front door and glazed screen with door to rear garden, all with high performance glazing and frames. New pitched roof extension to have white painted render external wall finish, 1no. Main + 3 no. Minor rooflights, and new rainwater goods generally. Concrete roof tiles are to match existing roof in height and material. Solar tubes/panels to rear south-facing roof. All colours to match existing where possible.
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 |
|---|---|---|---|
| 2 Mount Alton Court, Knocklyon, Dublin 16 | Jul 2025 | €1,225,000 | 89 m |
| 35 Mount Alton, Knocklyon, Dublin 16 | Feb 2025 | €595,000 | 94 m |
| 5 Idrone Park, Knocklyon Wood, Templeogue Dublin 16 | Jun 2025 | €680,000 | 157 m |
| 4 Knocklyon Avenue, Templeogue, Dublin 16 | May 2025 | €670,000 | 226 m |
| 6 Idrone Dr, Knocklyon, Templeogue Dublin 16 | Jul 2025 | €575,000 | 227 m |
| 2 Knocklyon Ave, Knocklyon Woods, Dublin 16 | Dec 2025 | €881,000 | 231 m |
| 51 Idrone Dr, Knocklyon, Dublin 16not full market price | Mar 2025 | €487,500 | 292 m |
| 60 Knocklyon Green, Templeogue, Dublin 16 | Apr 2026 | €650,000 | 300 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 received23 January 2017
- Decision due19 February 2017
- Decision issued15 February 2017
In the area
Applications near this site
Other planning applications within about 500 m — what else is being proposed or built nearby.
- Granted40 m away
Single storey extension to the side and rear including all associated site works. The extension will consist…
32, Mount Alton, Knocklyon, Dublin 16.
SD07B/0019South DublinLodged 23 Mar 2007Extension
- Granted40 m away
Single storey extension to the side and rear including all associated site works. The extension will consist…
32, Mount Alton, Knocklyon, Dublin 16.
SD07B/0019/EPSouth DublinLodged 27 Jan 2012Extension
- Refused50 m away
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear…
38, Mount Alton, Dublin 16
SD18B/0488South DublinLodged 21 Nov 2018Extension
- Part granted, part refused50 m away
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear…
38, Mount Alton, Knocklyon, Dublin 16, D16 K721
SD19B/0368South DublinLodged 18 Sept 2019Extension
- Granted50 m away
Extension to the house by 5.9sq.m. to the side and front and 25.4sq.m. to the rear at ground floor and…
18, Mount Alton, Knocklyon, Dublin 16
SD06B/0015South DublinLodged 13 Jan 2006Extension
- Granted70 m away
Extension to front providing bay window to sitting room with pitched roof over and replacement flat roof over…
27, Knocklyon Close, Knocklyon, Dublin 16
SD03B/0107South DublinLodged 5 Mar 2003Extension
- Granted80 m away
Conversion and extension of existing ground floor garage and the construction of new first floor extension…
20, Knocklyon Close, Dublin 16
SD12B/0060South DublinLodged 13 Mar 2012Extension
- Awaiting decision80 m away
Construct a first floor extension to side, conversion of existing garage to domestic use, ground floor…
20 Knocklyon Close, Templeogue, Dublin 16.
S01B/0647South DublinLodged 17 Dec 2001Extension
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