← Back to search

23 Knocklyon Grove, Knocklyon, Dublin 16, D16 Y443

Valid

Planning application SD26B/0466W

Dublin - South Dublin County Council

Proposed Development

Single storey extension, a rear attic dormer extension, 3 no. roof windows to front elevation, alterations to existing roof height and all elevations.

View the full application file on the council's planning portal →

Application Timeline

  1. Application received

    14 Oct 2026

  2. Decision due (upcoming)

    8 Dec 2026

Application Details

Location
23 Knocklyon Grove, Knocklyon, Dublin 16, D16 Y443
Applicant
N/A
Application Type
Permission
Planning Authority
South Dublin County Council
Eircode
D16 Y443
Site Area
490 ha
Floor Area
102.94 sq m

Timeline

Registration Date
14 October 2026
Status
Valid
Decision
Pending
Decision Due
8 December 2026

Location

Loading map...

Planning Applications Nearby

What the council has granted and refused around this site is the best guide to how a similar application will fare.

46m
SD03B/0107Granted5 Mar 2003

Extension to front providing bay window to sitting room with pitched roof over and replacement flat roof over ex. porch, part garage etc., with pitched roof.

27, Knocklyon Close, Knocklyon, Dublin 16

50m
SD04B/0378Granted16 Jul 2004

The development will consist of an attic conversion and a 2-storey extension at rear including (1) extended kitchen and dining area with new utility room at ground floor (2) two bedrooms with ensuite bathroom and storage area at first floor.

4, Idrone Park, Knocklyon, Dublin 16

51m
SD07B/0354Grant Permission for Retention25 Apr 2007

Retention of single storey extension to kitchen to rear, first floor extension over garage to provide en-suite bedroom and study and pitched roof over existing porch.

25, Knocklyon Close, Knocklyon, Dublin 16

51m
S99B/0522Granted9 Aug 1999

Construct a 2 storey extension over garage to the side of existing 2 storey house with a single storey extension to the rear and new pitched roof over front porch and garage.

25 Knocklyon Close, Knocklyon Woods, Dublin 16.

61m
SD03B/0529Granted29 Oct 2003

First floor extension to side over garage to provide bedroom and bathroom and pitched roof to ex porch to front.

19, Knocklyon Close, Knocklyon, Dublin 16.

61m
SD03B/0427Invalid - Site Notice19 Aug 2003

First floor extension to side over garage to provide bedroom and bathroom and pitched roof to existing porch to front.

19, Knocklyon Close, Knocklyon, Dublin 16.

63m
SD21B/0330Granted3 Jun 2021

Additional attic space containing a bedroom; bathroom; home office; and recreation room by replacing the existing roof with a new dormer attic roof with two dormers to the rear; a triangular roof light to the front and 4 'Velux' rooflights to front and 3 to the rear of the existing house. In addition permission is sought to provide 2 bay windows plus a covered porch to the front.

4, Knocklyon Grove, Templeogue, Dublin 16

63m
SD21B/0254Invalid Application5 May 2021

Create additional attic space containing a bedroom, bathroom, home office and recreation room by replacing the existing roof with a new dormer attic roof complete with two dormers to the rear; a triangular roof light to the front and 4 'Velux' rooflights to the front and 3 to the rear of the existing house; 2 bay windows and a covered porch to the front.

4, Knocklyon Grove, Templeogue, Dublin 16

64m
SD15B/0110Granted8 Apr 2015

2 storey extension to side of existing house with partial conversion of garage to provide new kitchen and toilet at ground floor and 2 bedrooms and bathroom at first floor with pitched roof to match existing including new pitched roof to existing porch, with new door and brick panel to side passage and new door to garage and windows at both ground and first floor to side (east) elevation.

13, Knocklyon Close, Knocklyon, Dublin 16

67m
SD04A/0828Granted9 Nov 2004

Provision of a house to side of existing house.

4, Knocklyon Grove, Templeogue, Dublin 16

Affected by this application?

Open for submissions
21days left to make a submission

Observations close on Tuesday 17 November 2026, five weeks from the date the application was received. The fee is €20, and only planning grounds count.

Check if you have grounds — free

Two questions, no payment: we'll tell you whether what concerns you is something the council can actually take into account.

Planning a project of your own?

Find out in two minutes whether you need planning permission. It's free, and based on the exempted development regulations.

Do I Need Permission?