20, Knocklyon Heights, Dublin 16
Extensions and alterations to an existing house, including a new second storey with roof terraces.
SD06B/0409 · South Dublin County Council · Lodged 27 October 2006
- Reference
- SD06B/0409
- Authority
- South Dublin County Council
- Register status
- Decided
- Type
- Permission
- Received
- 27 October 2006
- Floor area
- 521.6 m²
Summary
AI-generatedThe project involves constructing a front porch, a single-storey side and rear extension, and adding a second storey with flat-roof terraces to the front and rear. It also includes internal alterations, chimney modifications, and access via Mount Alton.
- Storeys
- 2
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
Porch to front, single storey extension to side and rear; addition of a second storey with roof terraces to front and rear with new flat roof & internal alterations; addition of a new chimney and the extension of the existing chimney: accessed through mount alton.
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 |
|---|---|---|---|
| 38 Knockfield Manor, Knocklyon, Dublin 16 | Oct 2025 | €975,000 | 107 m |
| Apt 5 Prospect Lodge, Knocklyn Road, Dublin 16 | Jun 2025 | €330,000 | 148 m |
| 35 Mount Alton, Knocklyon, Dublin 16 | Feb 2025 | €595,000 | 169 m |
| 2 Mount Alton Court, Knocklyon, Dublin 16 | Jul 2025 | €1,225,000 | 173 m |
| 7 Beverley Park, Knocklyon, Dublin 16 | Sept 2025 | €280,000 | 181 m |
| 22 Beverly Downs, Knocklyon, Dublin 16not full market price | Sept 2025 | €260,000 | 246 m |
| 28 Beverly Ave, Beverly Court, Knocklyon | Feb 2025 | €475,000 | 260 m |
| 1 Beverly Downs, Beverly Court, Knocklyon Dublin 16 | Sept 2025 | €765,000 | 266 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 received27 October 2006
- Further information requested25 July 2006
- Further information received27 October 2006
- Decision due23 November 2006
- Decision issued21 November 2006
- Grant issued3 January 2007
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
Alterations to the approved plans Reg. Ref. SD06B/0409 to include internal alterations/sub-division to the…
20, Knocklyon Heights, Dublin 16
SD08A/0227South DublinLodged 7 Apr 2008Apartments
- Granted60 m away
Single storey extensions to front and rear
11, Mount Alton, Dublin 16
SD08B/0565South DublinLodged 1 Aug 2008Extension
- Granted60 m away
New porch to side of existing house, retention of utility to side and conservatory to rear
22 Beverly Park, Knocklyon, Dublin 16.
S00B/0142South DublinLodged 7 Mar 2000Retention
- Granted70 m away
Widening of existing driveway entrance & resurfacing of driveway and all associated site works, to…
3, Knockfield Manor, Knocklyon, Dublin 16.
SD06B/0183South DublinLodged 23 Mar 2006Alterations
- Invalid70 m away
Widening of existing driveway entrance & re-surfacing of driveway and all associated site works, to…
3, Knockfield Manor, Knocklyon, Dublin 16
SD05B/0382South DublinLodged 8 Jun 2005Alterations
- Granted100 m away
Conversion of garage at side of house to t.v. room with pitched roof over
19 Mount Alton, Knocklyon, Dublin 16.
S00B/0093South DublinLodged 19 Apr 2000Extension
- Granted100 m away
Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey…
43, Mount Alton, Dublin 16
SD20B/0303South DublinLodged 24 Aug 2020Extension
- Granted110 m away
Single storey extension to rear, conversion of garage, two storey extension to side, dry dash finish to…
38 Knockfield Manor, Knocklyon, Dublin 16.
S99B/0704South DublinLodged 20 Jan 2000Extension
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
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D04B/0876Dún Laoghaire–RathdownLodged 13 Dec 2004
- GrantedExtension
Alterations to existing house including an extension to the southwest corner of the house; addition of a new…
Four Seasons, Woodtown Way, Rathfarnham, Dublin 16, D16 NH67
SD19B/0404South DublinLodged 14 Oct 2019
- Part granted, part refusedExtension
Construction of a new porch, bay window and pitched roof to the front of the ground floor; a first floor…
83, Butterfield Avenue, Rathfarnham, Dublin 14
SD03B/0046South DublinLodged 4 Feb 2003
- GrantedExtension
Alterations to existing entrance canopy roof to form new front porch extension; removal of chimney to north…
3, Greygates, Stillorgan Road, Blackrock, Dublin, A94T9K0
D26B/0083/WEBDún Laoghaire–RathdownLodged 12 Feb 2026
- GrantedExtension
Single storey porch extension to front, and two storey kitchen, utility room and bedroom extension to rear of…
26, Ballyowen Crescent, Lucan, Co. Dublin.
SD06B/0153South DublinLodged 15 Mar 2006
- GrantedExtension
New front porch, bedroom extension to front and side of existing house, two storey extension to rear…
116, Longwood Park, Grange Road, Rathfarnham, Dublin 14.
SD05B/0183South DublinLodged 18 Mar 2005
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