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2 Mount Alton Court, Knocklyon, Dublin 16, D16 HW83

Grant Permission for Retention

Planning application SD26B/0225W

Dublin - South Dublin County Council

Proposed Development

The development consists of re-location and enlargement of ground floor window to eastern side elevation of dwelling-house.

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

Application Timeline

  1. Application received

    12 May 2026

  2. Decision: Grant Permission for Retention

    6 Jul 2026

  3. Decision due

    8 Jul 2026

  4. Grant issued

    20 Aug 2026

Application Details

Location
2 Mount Alton Court, Knocklyon, Dublin 16, D16 HW83
Applicant
N/A
Application Type
Retention
Planning Authority
South Dublin County Council
Eircode
D16 HW83
Site Area
490 ha

Timeline

Registration Date
12 May 2026
Status
Final Grant
Decision
Grant Permission for Retention
Decision Date
6 July 2026
Grant Date
20 August 2026
Permission Expires
19 August 2031

Location

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Planning Applications Nearby

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

17m
SD06A/0960Refused10 Nov 2006

Detached two storey house which will require the partial demolition of an existing garage with the remainder to be converted into a conservatory attached to the proposed house; driveway to be widened to facilitate a shared entrance.

3, Mount Alton Court, Knocklyon Road, Dublin 16.

34m
SD06B/0015Granted13 Jan 2006

Extension to the house by 5.9sq.m. to the side and front and 25.4sq.m. to the rear at ground floor and 28.8sq.m. to the side over existing garage and kitchen at first floor; the change of use from garage to a study together with modifications to internal arrangements and elevations; the provision of automatic gates to existing driveway and the increase in height of the front boundary walls to 1200mm high.

18, Mount Alton, Knocklyon, Dublin 16

45m
SD20B/0137Granted28 Apr 2020

Amendment of the position of the entrance door in front porch of existing house; internal changes to the existing layout at ground floor & to convert the existing attic space into new bathroom & studio/bedroom with dormer window to side; a circular window in gable to the front & 'Velux' rooflights in the roof.

10, Mount Alton, Dublin 16

83m
ED17/0007Declared Exempt23 Jan 2017

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.

26, Mount Alton, Knocklyon, Dublin 16

84m
SD20B/0303Granted24 Aug 2020

Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey extension with rooflight to rear; two storey extension to side of dwelling with garage doors, dormer window to front and rooflights; single storey extension to front of dwelling; alterations to existing fenestration and material finish to front and side of existing dwelling, including new roof finish; attic conversion with dormer windows and rooflights to front and rear; widening of existing vehicular entrance to 3.5m and all associated site works.

43, Mount Alton, Dublin 16

87m
SD02B/0491Granted30 Oct 2002

Domestic, two-storey extension to front/side and garage to side.

5, Knocklyon Grove, Knocklyon, Dublin 16

87m
SD02B/0439Invalid - Site Notice25 Sept 2002

Single storey extension to front/side and garage to the side.

5 Knocklyon Grove, Knocklyon, Dublin 16

95m
SD15B/0154Granted11 May 2015

New single storey extension to side of dwelling extending into side garden, new roof lights to north and south elevations & associated site works.

2 Mount Alton Knocklyon Road, Dublin 16

97m
SD04A/0541Grant Permission for Retention22 Jul 2004

Retain, alter and complete the front garden walls and entrance gates, affecting the setting of a protected structure.

Idrone House, Idrone Avenue, Knocklyon, Rathfarnham, Co. Dublin

97m
SD04A/0402Invalid - Site Notice31 May 2004

To retain, alter and complete the front garden walls and entrance gates (affecting the setting of a protected structure).

Idrone House, Idrone Avenue, Knocklyon, Rathfarnham, Co. Dublin

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