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D23A/0061

Retention & Planning permission. i) Retention to retain a shed comprising an entertainment room/gym/playroom and storeroom, and gazebo at the rear of the dwelling. ii) Planning permission for demolition of the existing garage and shed, construction of a single storey extension to the side for granny flat and home office/guest room and widening of the existing vehicular access onto Clonmore Road.

20, Clonmore Road, Mount Merrion, Blackrock, Dublin, A94W1X0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.0 km away
Granted28 March 2023
D22A/0712

The development will consist of the demolition of the existing garage and shed, construction of a single storey extension to the side for granny flat and home office/guest room. Widening of the existing vehicular access onto Clonmore Road.

20 Clonmore Road, Mount Merrion, Blackrock, A94 W1X0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.0 km away
Refused22 December 2022
D19A/0883

Permission for development. The development will consist of

5 Clonmore Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted15 January 2020
D21A/0410

Permission for development at this site

5, Clonmore Road, Mount Merrion, Dublin, A94W5C1Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Refused29 June 2021
D24B/0152

Permission for: 1) Conversion of existing hip roof to gable roof. 2) Proposed frosted window to new gable. 3) Proposed 2no. Velux windows and metal clad dormer all to front roof. 4) Widening of existing metal clad dormer to rear roof and widening of existing window to front elevation. 5) New habitable room for home office to new attic space. 6) Proposed single storey extensions to front elevation to include bay windows and external porch, with removal of exisiting window. 7) Replacement of existing pebbledash render with new smooth white render finish and all associated site works.

42, Clonmore Road, Mount Merrion, Blackrock, Dublin, A94V2P0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted31 May 2024
D23A/0524

Permission for the following: a) demolition of the existing garage/single-storey extension to the rear & side of the existing dwelling; b) construction of a part single & two-storey extension to the front, rear & side of the existing dwelling; c) 2no. bay window and porch extension to the front of existing house; d) 3no. rooflights to new flat roofs to rear & 1no. rooflight to side of new extended main roof; e) minor alterations to existing elevations including provision of enlarged window to front and reduced window to rear, both at first floor, all to existing house, f) all associated site works & landscaping works including widening of existing vehicular entrance to driveway.

118 Tree's Road Upper, Mount Merrion, Co. Dublin, A94 PR80Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted29 September 2023
D24A/0413

Permission for alterations and additions to an existing 2-storey semi-detached dwelling comprising of the demolition of an existing single-storey extension to the gable-end and to the rear, together with the demolition of an existing second floor/attic level dormer extension to the rear. The proposed new works will comprise the construction of a new 2-storey/part-single storey extension to the rear, and a new 2-storey/part single storey extension to the gable-end, together with a new dormer extension to the rear to replace the existing dormer extension at second floor/attic level, including new velux rooflights to the front and rear. The proposed works will also comprise a new entrance porch and alterations to the existing window openings to the front elevation, together with the widening of the existing vehicular entrance to the front boundary of the property, and the provision of a new bike /storage shed to the side garden, and all associated ancillary site works including connections to existing services.

96, Trees Road Upper, Mount Merrion, Blackrock, Dublin, A94X7H9Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted01 August 2024
D22A/0975

Retention Permission. The development will consist of an increase to the existing driveway entrance by 0.5 metres with new pier to match existing.

39 Thornhill Road, Mount Merrion, Blackrock, Co Dublin, A94Y7V7Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.1 km away
Granted03 February 2023
D23B/0601

Permission for construction of a dormer window in the main roof to the rear of the house as well as the construction of a dormer window in the main roof to the front of the house.

23, Clonmore Road, Mount Merrion, Blackrock, Dublin, A94A0V5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted22 February 2024
D20A/0658

Permission for alterations and additions to existing

No.33 Thornhill Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted11 November 2020
D20A/0077

Permission fro development. The development will consist of

12 Clonmore Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted25 March 2020
D20A/0381

Permission for development. The development will consist of

12 Clonmore Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted23 July 2020
D26B/0021/WEB

The development will consist of removal of existing porch door and relocation of existing front door and incorporating the existing porch into the floor area of the dwelling (floor area 1.72m.sq.), construction of a single storey extension to front, side and rear of the dwelling consisting of the conversion of the garage, extension to front of garage and extension to rear of the dwelling (total floor area 58.28m.sq.) and associated site works.

Greenways, 128 Trees Road Upper, Mount Merrion, Co. Dublin, A94W8W8Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted09 March 2026
D20B/0125

The development will consist of the construction of

27 Thornhill Road, Mount Merrion, Blackrock, Co. Dublin A94 N8C5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted10 July 2020
D21A/0233

Permission for the following, including all associated site-works: a) Internal alterations at ground floor level including front and side facing flush roof-lights and demolition of front chimney. b) A single-storey, rear ground floor, flat roofed extension (55sq.m.) and patio. c) Conversion of the side garage (18sq.m.) including the relocation of the main entrance from the eastern side to the converted western side and the extension of the original roof over same with a pergola in front. d) Conversion of the attic to non-habitable storage area and bathroom and the replacement and enlargement of the existing sub-standard rear facing dormer window, also the provision of flush roof-lights and alterations to the west facing hip, e) Widening of the existing front vehicular entrance from 2.4m to 3.5m. f) A detached single-storey, flat roofed games room and home office (45sq.m.) at the southern end of the rear garden.

27 Clonmore Road, Mount Merrion, Blackrock, County Dublin (A94 C1P3)Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted28 July 2021
D20B/0221

Permission sought for proposed front single storey

69 Trees Road Upper, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted01 April 2021
D23A/0449

Erect a single storey extension to the rear including minor internal alterations, associated site works and retention of wider vehicular access.

19 Redesdale Road, Mount Merrion, Blackrock, Dublin, A94C7W3Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.1 km away
Granted24 August 2023
D22A/0151

Permission for development. The development will consist of

21 Redesdale Road, Mount Merrion, Blackrock, Co. Dublin, A94W0Y1Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted27 April 2022
D21A/0291

Permission for development. The development

21, Redesdale Road, Mount Merrion, Blackrock, Co Dublin, A94W0Y1Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted02 June 2021
D20A/0431

Permission is sought for the construction of a forward-facing single-storey flat roof extension to side passage (south), and all associated site works.

15 Redesdale Road, Mount Merrion, Blackrock, Co. Dublin A94 D3K7Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted24 September 2020
D20A/0434

Permission is sought for the extension. The proposed development will include the extension of the existing pitched roof over the existing first floor extension, the Widening of the existing vehicular entrance and an additional single storey extension to the rear of the site.

67 Trees Rd Upper, Mount Merrion, Blackrock, Co. Dublin A94 E9WDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted20 October 2020
D26A/0154/WEB

Permission and retention permission for 01) Bay window extension with a pitched roof to the front of the house and relocation of the front door to the front wall of the house 02), Construction of single storey extension to the rear of the house, increasing the size of existing extension and replacing the existing pitched roof with a new flat roof over the total single storey extension area to the rear, 03) Retention of 13m2 which forms part of the existing single storey to the rear 04) Proposed alteration to fenestration 05) Construction a dormer roof extension to the rear of the house to replace the existing dormer and retention of the converted attic area (19.9m2), 06) A roof light to the front roof pitch of the house and a roof light to the side roof pitch of the house 07) Widening of the existing front vehicular access gates and 08) All associated site works to facilitate the development

92, Trees Road Upper, Mount Merrion, Dublin, A94V2D5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.1 km away
Granted16 April 2026
D20B/0358

Permission for development at this site

17, Thornhill Road, Mount Merrion, Dublin, A94EOW6Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted22 March 2021
D24A/0369

Change of use of existing dwelling to use as a dental surgery with associated internal alterations with a total floor area of 180sqm. 1 additional car parking space and cycle bike storage to rear of property. New 2.8m x 0.6m signage above front entrance and associated site works.

103, Trees Road Upper, Mount Merrion, Blackrock, Dublin, A94WD36Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Refused23 July 2024
D21A/0538

Permission for development. The development will consist of

39 Clonmore Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted17 December 2021
D20A/0623

Permission for development

90, Trees Road Upper, Mount Merrion, Blackrock, Co Dublin, A94P9X0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted29 October 2020
D25A/0626/WEB

The development will consist of the proposal to remove condition No.7 of granted permission D16A/0206 to omit the requirement of "the physiotherapy practice be operated only by a physiotherapist in residence in the dwelling of which it forms part and that it not be separated from the existing dwelling either by way of sale or letting or otherwise." No changes are proposed internally or externally to the building or curtilage.

105, Trees Road Upper, Mount Merrion, Blackrock, Dublin, A94RX70Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted01 October 2025
D25A/0089/WEB

Retention Permission is sought for demolition of the existing dwelling and garage in its entirety, Permission is sought for the construction of a new two storey house and single storey extension to rear (with 1 no rooflight); increase in width of existing front vehicular entrance & all associated site works to a demolished two storey semi-detached house at 40 Thornhill Road, Mount Merrion, Blackrock, Co. Dublin, A94 K4X0.

40, Thornhill Road, Mount Merrion, Blackrock, Dublin, A94K4X0Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.2 km away
Granted02 April 2025
D23A/0302

Demolition of the single storey conservatory extension to rear and the garage and store to side to allow for the subsequent construction of a two storey extension to side and single storey extension to rear with 1 no. rooflight. New two storey protruding extension to front. 2 no. new bay windows to front at ground floor. 2no. new projecting windows to rear at first floor level. External insulation to all external walls, modifications to existing fenestration, increase in width of existing front vehicular entrance & all associated site works to an existing two storey semi-detached house.

40, Thornhill Road, Mount Merrion, Blackrock, Dublin, A94K4X0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted23 June 2023
D22B/0189

Permission for an extension and refurbishment

23, Cedarmount Road, Mount Merrion, County Dublin, A94P9K7Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted30 June 2022
D25A/0617

Planning permission is sought for development comprising (i) demolition of the existing bungalow dwelling and associated outbuildings on site; (ii) the construction of 4 no. two-storey with attic semi-detached, three bedroom dwellings (iii) modifications to existing vehicular entrance along Trees Road Upper to provide three new vehicular entrances and the addition of a new vehicular entrance along Redesdale Road (iv) provided with 4 no. on curtilage car parking spaces (1 no. space per dwelling) and private amenity space; (v) repair and part replacement of existing damaged boundary wall and new timber fence over portion; and, (vi) inclusive of all associated works, landscaping planting and boundary treatments, infrastructure, lighting, foul/surface drainage, site works, necessary to facilitate the development.

27 Redesdale Road, Mount Merrion, Blackrock, Co. Dublin, A94T9W6Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted17 November 2025
V/060/25

4 dwellings

27, Redesdale Road, Mount Merrion, Blackrock, Co. Dublin, A94T9W6Dun Laoghaire Rathdown County CouncilCertificate of Exemption - Part V0 reasons0 conditions0.2 km away
Granted29 August 2025
D22B/0072

Retention permission. The area to be retained consists of

36 Thornhill Road, Mount Merrion, Co. Dublin, A94A6K2Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.2 km away
Granted11 April 2022
D20A/0738

Retention is sought for widened

36, Thornhill Road, Mount Merrion, Co DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted01 December 2020
D21A/1106

Permission for development which will consist of;

107 Trees Road Upper, Mount Merrion, Blackrock, Co. Dublin A94 D8W5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Refused15 February 2022
D25A/0143

Which will consist of change of use of existing 125sq metre vacant commercial premises to a Veterinary Clinic. The proposed works include internal alterations, soundproofing the kennel area signage, and ancillary works.

107, Trees Road Upper, Mount Merrion, Blackrock, Dublin, A94D8W5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted16 April 2025
D26A/0295

For the demolition of 2 no. garages (one each at Nos. 33 and 35 Clonmore Road), and a glass house and polytunnel both at No. 33, and the construction of 8 no. semi-detached part dormer part two storey three bedroom dwellings (5 no. 130 sq.m, each; 2 no. 140 sq.m, each and 1 no. 158 sq.m.) with a shared surface road way to the side of No. 33, and all ancillary site development works (including drainage, landscaping, new boundary walls to Nos. 33 & 35) at a 0.198 ha. site formed by part of Nos. 33 and 35 Clonmore Road, Mount Merrion, Co. Dublin.

Rear lands No. 33 & No. 35 Clonmore Road, Mount Merrion, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Refused10 June 2026
D25B/0485/WEB

Front porch extension with new side-facing window, a single-storey flat roof rear extension, and the demolition of the existing ground floor rear extension.

35, Cedarmount Road, Stillorgan, Blackrock, Dublin, A94T8X2Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted17 October 2025
D26A/0159/WEB

Full planning permission for the demolition of the existing single-story side garage & removal of chimney to the main roof, Construction of a Two-story Side Extension, Single-story Rear Extension & Attic Conversion with windows to the Existing Dwelling & widening of the existing vehicular entrance, all ancillary Site works necessary.

46, South Avenue, Mount Merrion, Co. Dublin, A94W9D8Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted23 April 2026
D21A/1152

Permission for the following: a) Widening of the existing vehicular entrance to 3.5m. b) The construction of a ground floor rear extension (5sq.m.) behind the garage. c) Conversion of portion 2(sqm) of the rear of the garage to a bathroom. d) All associated site and internal works.

57 Trees Road Upper, Mount Merrion, Blackrock, County Dublin (A94 F8K7)Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted22 February 2022
D24B/0265

Permission for Amendments to previously granted permission register Reference D23B/0062 for development. The development will consist of: Demolition of existing single storey extension to side and chimney. The construction of a new single storey extension to side and smaller single storey extension to rear for proposed study, new layout for kitchen/ living and utility area and new long window to existing front elevation.

64, Thornhill Road, Mount Merrion, Blackrock, Dublin, A94T6T0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted29 July 2024
D23B/0062

Demolition of existing single storey extension to side, utility room to rear and chimney. The construction of a new single storey extension to side and rear for proposed study, new layout for kitchen/living and utility area and new long window to existing front elevation. Construction of first floor extension to the side for a new family bathroom.

64, Thornhill Road, Mount Merrion, Dublin, A94T6T0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted11 April 2023
D22A/0613

Permission for development. The development will consist of the removal of the existing fascia and rooflights to the single storey extension to the side of the house and porch overhang to the front. The removal of the chimney stack to the rear. The construction of a first floor extension on the same footprint as the ground floor with flat roof and parapet detail to accommodate a master bedroom en suite, utility room, study and small balcony over porch to front with access from study.

26, Thornhill Road, Mount Merrion, Dublin, A94N4V8Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted10 October 2022
D21B/0691

Permission is being sought for alterations

44, South Avenue, Mount Merrion, Dublin,Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted18 February 2022
D21A/0635

The development will consist of

7, Thornhill Road, Mount Merrion, Blackrock, County Dublin, A94D1WSDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted27 August 2021
D25A/0466/WEB

Alterations to previously granted planning application reg/ref: D24A/0932/WEB to include attic dormer with window to the rear and associated works.

68, Thornhill Road, Mount Merrion, Lower Kilmacud Road, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Refused01 August 2025
D25A/0183/WEB

Alterations to previously granted planning application reg/ref: D24A/0932/WEB to include: increased separation of first floor west gable wall from boundary line, reduction in size of ground floor rear extension, modifications to configuration of first floor rear extension, inclusion of two modest east facing first floor windows, roof light to the front and associated works.

68, Thornhill Road, Mount Merrion, Blackrock, Dublin, A94E2R9Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted01 May 2025
D24A/0932/WEB

Demolition of the existing single storey garage / extension to the side and rear and existing chimney to the rear. Construction of new two storey pitched roof extension to the side and rear with bay projection to the front, part two storey / part single storey flat roof extension to the rear, internal alterations including attic conversion and roof lights to the side and rear. Works will also consist of widening of existing vehicular entrance, site drainage, landscaping and associated works.

68, Thornhill Road, Mount Merrion, Blackrock, Co. Dublin, A94E2R9Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted23 January 2025
D25B/0680/WEB

Permission sought to: 1) Demolish existing single storey conservatory to north side (behind existing garage); 2) Construct two storey brick clad extension to north side (behind existing garage) including upper floor extension to side of existing house; 3) Dormer window with zinc cladding to south side roof; 4) Associated alterations to first floor rear window and new brick cladding to rear; 5) Associated internal alterations.

32 Redesdale Road, Mount Merrion, Co. Dublin, A94R2R8Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.2 km away
Granted05 February 2026
D22A/0005

Retention Permission sought for (a) garage conversion to side and rear with increased height of roof and flat roof light (b) alterations to window openings to rear (c) addition of velux windows to side and rear hip (d) projecting canopy to front and rear (e) Widening of drive way entrance on to Lower Kilmuir Road, internal alterations, drainage and external works.

Medways, 137 Lower Kilmacud Road, Stillorgan, Co. Dublin, A94KP04Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.2 km away
Granted23 February 2022
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