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Planning records

Showing 201-250 of 35,919 public records
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D22B/0323

Planning permission is sought for the proposed build up of existing gable wall to meet newly extended roof ridge line and conversion of attic space with new dormer window & rooflights to rear, new single storey extension to rear, new lean-to roof over ground floor porch and living room and all associated site works

11 Mather Road North, Mount, Merrion, Co. Dublin.Dun Laoghaire Rathdown County CouncilPermission2 reasons0 conditions0.6 km away
Residential AmenityVisual Amenity
Granted01 September 2022
D23A/0478

The demolition of the Telephone Exchange (514 sq m) and the construction of a part 3 - part 4 No. storey Residential Development (1,576 sq m) comprising 15 no. apartments ( 6 no. 1 bed units, 8 no. 2 bed units and 1 no. 3 bed unit) with associated balconies, terraces and winter gardens predominantly facing north, south and east. The development will also include: the upgrade of the existing vehicular entrance to the site from Priory Drive, the provision of a seperate pedestrian entrance to the site from Priory Drive. 14 no. car parking spaces (including 1 no. disabled parking space). 1 no. motorcycle parking space, bicycle parking, bin store, hard and soft landscaping, boundary treatments, lighting; plant, green roof; and all other site and development works above and below ground.

6, Priory Drive, Stillorgan, Dublin, A94X205Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted06 February 2024
D26A/0035/WEB

The proposed development shall consist of: 1) Alterations to existing vehicular entrance to increase in width to 3.5M. 2)Demolition of the existing garage and single storey garden structure to rear. 3) Alterations to the existing roof structure to increase ridge height and allow for construction of a first floor structure. 4)Single storey extension to the rear and side including for new garage and plant room. 5) All associated alterations and demolitions, site, drainage, landscaping and ancillary works.

3, The Foster's, Mount Merrion, Dublin, A94TK64Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted13 March 2026
D16A/0465/E

Permission for the demolition of the former Oatlands Monastery building (c.1,682 sqm) and other derelict buildings on the site (c.101 sqm), the demolition of the existing single storey dwelling at No. 2 Cherrygarth (c.157 sqm) and the construction of 63 residential units. The development will be accessed through a new entrance at No. 2 Cherrygarth. Residential development will comprise 9 houses, 24 duplexes and 30 apartments. These are broken down as follows: One 3-bed detached two-storey dwelling (c.8.3m in height) to replace the demolished dwelling at No. 2 Cherrygarth, 8 no. 2.5 storey 4/5 bed detached units (between c.9.9 - 10.13 metres in height), 12 no. 3-bed duplex units of 3 storeys (c.12.8 - 15.8 metres in height) with terraces and balconies on the north and south elevations, two apartment blocks of 4 storeys (c.13.5 metres in height) with 4 no. 1-bed units, 20 no. 2-bed units and 6 no. 3-bed units with balconies on the north, east and south elevations. The development will also include 18 on-curtilage car parking spaces associated with the detached dwelling units, 43 at-grade car parking spaces associated with the duplex units, 47 car parking spaces at basement level of the apartment block (c.1,808 sqm), 2,929 sqm of open space, including a children's play area and all associated site development works above and below ground, including site services.

Site of c.1.12ha at Oatlands Monastery, to the rear of Oatlands College, Mount Merrion, Blackrock, Co Dublin and at No. 2 Cherrygarth, Mount Merrion, Blackrock, Co DublinDun Laoghaire Rathdown County CouncilExtension Of Duration Of Permission0 reasons0 conditions0.6 km away
Granted17 June 2022
D24A/0417

Subdivision of 110 and 110A to create two residential dwellings, on No 110A the demolition of single storey structure to rear, construction of a single storey rear extension with internal alterations, conversion of existing and new attic space to two number habitable rooms, raising of roof ridge line, 2 new roof lights to front elevation, new front entrance porch, new gated vehicle & pedestrian access to front boundary and associated site works.

110 & 110A, Booterstown Avenue, Booterstown, Blackrock, Dublin, A94W6Y3Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted01 August 2024
D23B/0016

Retention planning permission for a single storey garage conversion as an additional bedroom to side of existing house with associated ancillary works.

10, Priory Drive, Stillorgan, Dublin, A94DW02Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.6 km away
Granted07 March 2023
D24A/0993/WEB

The development will consist of: a) Demolition of existing c.178sqm two-storey (plus non-habitable attic space), 4 bedrooms dwelling; b) Construction of a c.369 sq.m three-storey, 6 bedrooms dwelling; c) Modification to the existing vehicular entrance, including the provision of dedicated pedestrian access; and, d) All associated site development and drainage works to facilitate the development.

32, Deerpark Road, Mount Merrion, Stillorgan, Co. Dublin, A94X7K4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused12 June 2025
D23A/0539

(A) Demolition of existing 178sqm two storey (plus non habitable attic space), 4 bedrooms dwelling (B) Construction of 1no. 385sqm three storey 6 bedrooms dwelling. (C) Modifications to existing vehicular entrance. (D) All associated site development and drainage works to facilitate the development.

32, Deerpark Road, Mount Merrion, Blackrock, Dublin, A94X7K4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused11 April 2024
D21A/0738

Permission is sought for development at this site, consisting of 1) New single storey flat roofed extension with 2 No. rooflights to rear of the two storey mews pitched roofed dwelling. 2) Relocation of the mews main entrance door to rear laneway, with 1 No. new window ope, new replacement windows and dormer, along with internal alterations to the mews. 3) New pedestrian doorway to rear garden from side laneway, with new side laneway wall portion, along with all associated civil, landscaping and drainage works.

Existing mews dwelling and garden to rear of No 119, Mount Merrion Avenue, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted08 October 2021
D21A/0753

Permission for development. The development will consist of alterations to the permitted residential development under Reg. Ref. D16A/0465; ABP Ref. PL 06D.247267 comprising revisions to the wastewater and surface water drainage proposals. The revised drainage route is to the south of the site with the wastewater proposed to discharge to the existing system in Woodlands Avenue with the surface water to discharge to the existing system in the old Dublin Road. The development will include all associated site development works to facilitate the proposed development.

C.1.2087 ha. site located at the Former Oatlands Monastery (A94 W7W7), to the rear of Oatlands College, Mount Merrion Co. Dublin and 2 Cherrygarth (A94 D5K3), Mount Merrion, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused18 October 2021
D24A/0131

A) Demolition of the existing rear extension and side garage. B) The construction of a 108sqm part two-storey, part single-storey extension to front, side and rear. C) Internal alterations, elevational modifications including roof mounted solar panels and general refurbishment. D) Widening of vehicular entrance to 3.6m. E) New patio to rear and associated site works & landscaping.

76, Trees Road Lower, Mount Merrion, Blackrock, Dublin, A94Y7A4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted29 April 2024
D26A/0093/WEB

The demolition of detached garage and small single storey kitchenette to rear, opening up part of side wall of house to side passage and construction of new single storey flat roofed extension with rooflight to rear ( west ) and side (South) to incorporate larger kitchen and garden room. New part single and part 2 storey flat roof extension to laneway to incorporate enclosed storage and extended utility/home office & WC at ground floor and extended en suite and main bathroom at First floor (South). Relocation of main entrance to incorporate protected porch & modifications to existing external insulation with selected brick slips all to Front ( East ). Some modifications to fenestration, some minor internal modifications. New dormer to 2nd floor bedroom to rear/West. Widening and redesign of existing vehicular gateposts. New detached single storey home office to rear ( 29.3 Sq m), all associated demolitions, drainage and site works.

17, Priory Avenue, Stillorgan, Dublin, A94E206Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted08 April 2026
D20A/0974

Permission for an extension and

60, Cedarmount Road, Mount Merrion, Co DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted22 February 2021
D24B/0514/WEB

The development will consist of the provision of new pitched, part mansard type roof with new front dormer to replace existing roof with existing side dormer, the removal of existing front chimney, the provision of four new side rooflights and one new rear rooflight, and the provision of new side porch, all to existing single storey bungalow dwelling, with sundry associated works.

15, Wilson Road, Mount Merrion, Blackrock, Co. Dublin, A94A6P8Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted27 January 2025
D19A/0940

Retention Permission is sought for retention of alterations and additional alterations to previously granted planning permission, Dun Laoghaire County Council Reference D15A/0657, which granted permission for; Construction of a new single storey extension to the side, a new single storey extension to side and rear, and a new single storey extension to rear of the existing two storey detached house; to externally insulate and re-render the existing house; to re-roof and alter the existing windows and doors and to demolish the existing garage and construct a new garage to be part single storey, and part two storey to the rear and include a home office with associated site works which include widening the vehicular entrance gates, and providing a new pedestrian gate. The proposed alterations to this permission are: A. Reduction of 17.7 sq.m in the overall area of the proposed single storey extension to the rear, adjusted floor level, and altered fenestration to this extension; B. Reduction of 23.2 sq.m. of the area of the proposed garage. The garage is now proposed as single storey, including omission of the proposed home office, and omission of the boiler room. It is also proposed to reduce the overall height of the garage, and to use a concrete roof tile to match the existing house roof, rather than the slate roof previously proposed; C. Omission of the proposed single storey extension to the side and rear, a reduction in proposed area of 2.4 sq.m.; D. Increased footprint of the single storey side extension by 2.3 sq.m., to allow for construction build ups; E. It is now proposed to repair the existing flat roof to the rear return, rather than replacing it with a new pitched roof. This reduces the overall height of the rear return; F. It is proposed to omit the replacement render to the original existing house; G. It is proposed to relocate the outdoor terrace area at the rear of the house to the west of the site; H. Minor internal alterations to the internal layout of the house and minor alterations to windows to rear elevation; J. Alteration of surface water drainage to proposed new soakaway in rear yard.

Karinya, North Avenue, Mount Merrion, Co DublinDun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.6 km away
Granted06 February 2020
D23A/0529

Permission is sought. The development will consist of: Minor alterations to previously approved development under Reg. Ref. D18A/0799 and ABP Ref. ABP-302926-18, which provided for the demolition of the existing two-storey dwelling (350sq.m) and ancillary garage (28sq.m) and the construction of a part-three to part-five storey apartment development, comprising 26 no. residential units (8 no. 1-bedroom units and 18 no. 2-bedroom units), together with all ancillary works including the provision of car parking, bicycle parking and an amended entrance arrangement. The minor alterations proposed consist of the following: (i) an increase in the floor of a 2-bedroom apartment (Apartment No. 04-03) at 4th floor level (located on the south-western portion of the 4th floor level) by 11sq.m resulting in a 2-bedroom apartment of 109sq.m, a reduction in the size of external terrace area serving this unit from 53sq.m to 41sq.m and the addition of a privacy screen to the southern extent of this external terrace; and (ii) all associated works necessary to facilitate the development. This application comprises a revised application site area of 0.28hectares (reduced from 0.29hectares under Reg. Ref. D18A/0799 and ABP Ref. ABP-302926-18. There are no amendments proposed to the unit numbers, unit mix or overall building height as part of this application.

No. 45 Woodlands Park, Blackrock, Co. Dublin, A94 F248Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted29 September 2023
D24A/0041/WEB

Alterations to previously approved development under Reg. Ref. D18A/0799 and ABP Ref. ABP-302926-18, and Reg. Ref. D23A/0529, which provided for the demolition of the existing two-storey dwelling (350sq.m) and ancillary garage (28sq.m) and the construction of a part-three to part-five storey apartment development, comprising 26 no. residential units (8 no. 1-bedroom units and 18 no. 2-bedroom units), together with all ancillary works including the provision of car parking, bicycle parking and an amended entrance arrangement. The alterations proposed consist of the following: (i) the amalgamation of 1 no. one-bedroom and 1 no. two-bedroom apartment at third floor level (Unit Nos. 3.05 & 3.04) to provide for 1 no. three bed apartment at third floor level, and the connection of the two balconies to provide 1 no. balcony to serve the amalgamated apartment (41 sq.m.). This will result in a reduction in apartment numbers from 26 no. units to 25 no. units; (ii) relocation of bin store to southern boundary; (iii) change of external material to front façade of apartment building; (iv) construction of two storey mews dwelling in the north-western section of the site, comprising 4 no. bedrooms, living/ kitchen/ dining area, bathroom and utility room. An external terrace will be provided at first floor level; (v) addition of 2 no. car parking spaces to serve dwelling, resulting in a total provision of 28 no. car-parking spaces including 1 no. accessible parking space; (vi) provision of substation; and (vii) all associated site works necessary to facilitate the development.

45, Grove Lodge, Woodlands Park, Stillorgan, Dublin, A94F248Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted17 July 2024
D22A/0202

Permission is sought for development comprising:

45 Woodlands Park, Blackrock, Co. Dublin (A94 F248)Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted25 October 2022
D21B/0323

Permission sought for single and

115, Mount Merrion Avenue, Blackrock, Co Dublin, A94R250Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted18 August 2021
D20A/0406

Permission. The proposed development relates to the

Site at No's, 24, 26 and 28, Foster's Avenue, Mount Merrion, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted04 November 2020
D21B/0374

Permission is sought for the construction

131, Booterstown Avenue, Booterstown, Co DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted10 September 2021
D25A/0010/WEB

We, Naas Road Property Development Company Limited, intend to apply for planning permission for amendments to the development permitted under Reg. Ref.: D20A/0670 / ABP Ref.: 309931-21 at 24-28 Foster’s Avenue, Mount Merrion, Blackrock, Co. Dublin. The proposed amendments consists of the change of use of the permitted single storey resident’s communal amenity space (99 sq.m) to 1 no. 3 bed apartment. The proposal includes associated alterations to the elevations and the provision of private amenity space for the proposed apartment, and all associated development. The permitted development (under Reg. Ref.: D20A/0670 / ABP Ref.: 309931-21) is for 68 no. apartments, and the proposed amendments would result in an overall increase to 69 no. apartments.

24-28, Fosters Avenue, Mount Merrion, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted25 April 2025
D24A/0783/WEB

We, Naas Road Property Development Company Limited, intend to apply for planning permission for amendments to the development permitted under Reg. Ref.: D20A/0670 / ABP Ref.: 309931-21 at 24-28 Foster’s Avenue, Mount Merrion, Blackrock, Co. Dublin. The proposed amendments to the permitted development consists of the replacement of 3 no. 2 bed apartments at the third floor level of Block C with 2 no. 3 bed apartments. This results in a decrease in apartments in Block C from 27 no. to 26 no. apartments. The proposal includes associated alterations to the elevations and the provision of private amenity space for the proposed apartments, and all associated development. The permitted development (under Reg. Ref.: D20A/0670 / ABP Ref.: 309931-21) is for 68 no. apartments, and the proposed amendments would result in the overall decrease to 67 no. apartments.

24-28, Fosters Avenue, Mount Merrion, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted20 November 2024
D20A/0670

Permission for development. The proposed

24,26 28, Fosters Avenue, Mount Merrion, Blackrock, Co DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted18 March 2021
D26B/0231/WEB

The development consists of an amendment and modification of the permission as granted under Planning Ref. D23B/0234 that has resulted in only the partial conversion of the former garage. The permitted side extension and modified conversion of the garage now extend to 12.92sqm.

8, Saint Thomas Mead, Mount Merrion, Dublin, A94N902Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted09 June 2026
D23B/0081

Retention permission for raised stepped roof. On single storey side extension.

11, Wilson Road, Mount Merrion, Blackrock, Dublin, A94X7Y7Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.6 km away
Granted18 April 2023
D22A/0375

Permission for development. The development will consist of: A single story extension to the side and front. raising the roof of existing garage Infill of the existing porch to extend front bedroom, front single story extension. Velux window to the front roof area. Widening of front vehicular access. External insulation full house. removal of chimney.

11 Wilson Rd, Mount Merrion, Blackrock, Co. Dublin, A94X7Y7Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted22 July 2022
D25B/0077

Retention planning permission sought for a single storey extension (32.5sqm) to the rear of her property, including associated site works, landscaping and two new windows on the east elevation.

8, Saint Thomas Mead, Mount Merrion, Blackrock, Dublin, A94N902Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.6 km away
Refused07 April 2025
D23B/0234

Conversion and extension of a single storey flat roof side garage and construction of a single storey 'link' between the existing garage and the dormer house. The converted part of the garage will be 1050mm above the existing parapet height of the garage. The works will comprise garage conversion, WC, utility, hallway 'link' and associated site works and landscaping.

8, Saint Thomas Mead, Mount Merrion, Blackrock, Dublin, A94N902Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted11 July 2023
D24A/0234

Two storey with attic dormer, 4 bedroom detached dwelling incorporating alteration to existing driveway entrance to widen and provide seperate entrances to existing and proposed dwelling. The works include exempted development of part demolition of existing single storey extension to side of existing and minor alterations to the existing and all associated works.

86, Trees Road Lower, Mount Merrion, Blackrock, Dublin, A94V2A0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted31 May 2024
D24B/0345/WEB

Permission is sought for The conversion of existing attic space to new bedroom and ensuite with dormer window and roof light to rear and 2 No. Roof lights to front Elevation and all associated site works

48, Thornhill Oaks, Mount Merrion, Co. Dublin, A94 K0E7Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted19 September 2024
D24A/0814/WEB

Permission for: 1) Attic conversion for storage with dormer window to the rear. 2) First floor extension with gable to the side front. 3) Three Velux windows to the front roof area. 4) Raised roof on single-storey extension to the rear. 5) Widening of front vehicular access. 6) Change in roof profile.

30, Priory Drive, Stillorgan, Dublin, A94 CA32Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted27 November 2024
D25A/0978

1) Demolition of outbuildings to rear. 2) Removal of Porch to front to incorporate new front entrance door. 3) New single & two-storey extension to rear and side with new window to 1st floor front elevation. 4) 2No. Roofiights to side & INo. Rooflight to rear. 5) Removal of existing 1st floor window to gable. 6) Widening of existing driveway with new entrance gate. 7) All associated drainage and site works.

52, Cedarmount Road, Mount Merrion, Co. Dublin, A94Y8W6Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted17 February 2026
D22A/0643

Permission for development. The development will consist of: Demolition of the existing garage to the rear. Construction of a new part single storey and part two storey extension to the side and rear of the existing dwelling including rooflights. Installation of 17.5sqm of solar PV panels on South-East facing front roof. Insulation of flat roof/canopy to front. All associated demolitions, alterations, internal layout changes, drainage and ancillary works.

18 Mather Road North, Mount Merrion, Co. Dublin., A94DK23Dun Laoghaire Rathdown County CouncilPermission0 reasons9 conditions0.6 km away
Granted19 October 2022
D22A/0136

Permission and Retention. The Development will consist

18 Mather Road North, Mount Merrion, Co. Dublin.Dun Laoghaire Rathdown County CouncilPermission0 reasons6 conditions0.6 km away
Granted13 April 2022
D25A/0737/WEB

New 2 storey extension to side, single storey extension to rear, conversion of attic area, with dormer window to front, re-location of vehicular access (south-east on North Avenue) internal modifications and associated site works.

Kildara, 44A Foster's Avenue, Mount Merrion, Dublin, A94W963Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted17 November 2025
D25A/0463/WEB

New 2 storey extension to side, single storey extension to rear, conversion of attic area, with dormer window to front, re-location of vehicular access (south-east on North Avenue) internal modifications and associated site works.

Kildara, 44A Foster's Avenue, Mount Merrion, Blackrock, Dublin, A94W963Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused01 August 2025
D22A/0192

Full permission for development.

5, Cherbury Gardens, Booterstown, Blackrock, Co Dublin, A94 F6N7Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted03 May 2022
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 conditions0.6 km away
Granted17 October 2025
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 conditions0.6 km away
Granted22 February 2022
D24A/0410/WEB

The development for permission will consist of:• Construction of new dormer to rear of the main house roof to facilitate a habitable attic conversion with a bedroom and a shower room;• Change of roof from hipped to gabled with extended gable wall and rooflight to rear slope;• Alteration / enlargement of existing landing window on side gable wall;• All associated demolitions / alterations, internal layout changes, drainage and ancillary works.The development for retention permission consists of:• Retention of existing widened vehicular entrance / piers to front;

22, Mather Road North, Mount Merrion, Blackrock, Co.Dublin, A94Y528Dun Laoghaire Rathdown County CouncilPermission for Retention0 reasons0 conditions0.6 km away
Granted31 July 2024
D21A/0161

Permission for development. The proposed development will consist of: Conservation works to Thornhill House, to upgrade the house as a single family residence 494 sqm; the provision of 5No. own door two storey 2 bed dwellings to the rear of Thornhill House through the renovation, conversion and extension of an existing return and outbuildings located around an existing rear stable yard; and the provision of a terrace of 5 No. one-and-a-half storey mews dwellings located to the south of Thornhill House. The proposed conservation works and interventions to the house are to include - (i) Formation of new ope in partition to proposed kitchen in basement, (ii) Removal of door and alteration to window to rear hall at ground floor level; (iii) Modifications to WC and bathroom t landing level; (iv) Modifications to master ensuite at first floor level' (v) Removal of inappropriate internal doors to basement; and external architectural interventions / enhancements to include - (i) Removal of existing perspex screens to front portico, (ii) Removal of security grilles to windows and the rationalisation of soil pipes to the elevations (iii) Provision of new painted hardwood doors replacing inappropriate modern joinery elements to basement (iv) Improvements to external areas on eastern and western sides at basement level, (v) Removal of fixed maintenance ladders and gates to rear courtyard wall and provision of a private garden with associated railings, gates, soft and hard landscaping to the south and west of Thornhill House. Works to return and outbuildings to include creation of new opes, removal of sections of external wall and interior partitions, roofs to be removed and existing slates to be reused in new extension, removal of external courtyard wall and removal of corrugated roof over covered external space, wrought iron trusses and column supports, provision of new sash windows, refurbishment of existing original sash windows, replacement of non-original windows / doors, demolition of existing boiler room and WC to south-east of external courtyard. the proposed development will consist of the reconfiguration of the permitted ( Dun Laoghaire Rathdown County Council Reg. Ref. D17A/0240; An Bord Pleanála Ref. PL06D.300244) internal road layout, amendments to hard and soft landscaping, boundary treatment works including the provision of opes in the existing eastern stone wall and replacement of low wall and railings and all associated works above and below ground.

Site of c. 1.39 ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co.Dublin A Protected Structure (RPS No. 936)Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused22 April 2021
D20A/0432

Permission for development. The proposed development will consist of the reconfiguration and redesign of the permitted housing units (Dun Laoghaire Rathdown County Council Reg. Ref. D17A/0240; An Bord Pleanála Ref. PL06D.300244) to provide an increase from 9 No. houses (comprising 4no. four bed and 5no. five bed units) to 15 No. houses (comprising 3no. three bed and 12no. four bed units). Additional works include reconfiguration of the internal road layout, relocation of ESB substation, amendments to hard and soft landscaping, boundary treatment works and all associated works above and below ground. No works are proposed to Thornhill House (RPS No. 936), under this planning application.

Site of c. 1.39 ha, Thornhill House, CherryGarth, Mount Merrion, Blackrock, Co. DublinDun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused14 August 2020
D20A/0057

Permission for development. The proposed development will consist of the temporary removal of the eastern stone wall boundary and its subsequent reinstatement upon the completion of construction works on the wider site.

At a site of c.1.39ha, Thornhill House, Cherry Garth, Mount Merrion, Blackrock, Co. Dublin (Protected Structure Ref. No. 936)Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused18 March 2020
D26A/0228/WEB

Alterations and extensions to the existing single storey, three bedroom detached dwelling that will include: Demolition of the two garden sheds and other structures to the rear; Alterations and extensions to the existing single storey, three bedroom detached dwelling to create an extended six bedroom detached dwelling, that presents as being two storey to the front, and three storey to the rear that will be facilitated by the following works: internal alterations to the existing house; removal of the roof; and elevational changes to the front, side and rear of the existing house; an additional storey plus new pitched roof with hipped roof elements, above the existing house; a new two storey, and part three storey rear extension (at lower ground, ground and 1st floor level). The ground floor extension will connect to a terrace that will sit over the lower ground floor extension and will connect via external stairs to the rear garden; Alterations to the front boundary wall that will create a new pedestrian entrance gate and widened vehicular entrance with sliding gate off Deer Park Road with an amended driveway; and All landscaping, boundary treatments, drainage, SuDS and all ancillary works required to facilitate the development.

Rossbeg, 24 Deerpark Road, Mount Merrion, Co Dublin, A94E0P4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted19 May 2026
D25A/0754/WEB

Alterations and extensions to the existing house to include alterations to the front elevation, alterations to the eastern side of the house to provide a wider pedestrian side access, a first floor extension, a three storied extension to the rear of the existing house, alterations to the existing hard standing, alterations to the existing vehicular entrance, the formation of a separate pedestrian entrance in the front boundary wall and the demolition of two existing sheds, 24.6 sq.m.m.s, all works to include all associated site works.

24 Deerpark Road, Mount Merrion, Co. Dublin, A94E0P4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused25 November 2025
D25A/0600/WEB

The demolition of the existing house, 131.4 sq.m.s, and two existing sheds, 24.6 sq.m.s, the construction of a new house, 372 sq.m.s, two storied to the front and three storied to the rear, alterations to the existing hardstanding, alterations to the existing vehicular entrance and the formation of a separate pedestrian entrance in the front boundary wall, all works to include all associated site works.

Rossbeg, 24 Deerpark Road, Mount Merrion, Blackrock, Dublin, A94E0P4Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused19 September 2025
D23B/0118

Modifications to existing to existing elevation including replacement of windows to existing openings, replacement of glass roof with flat roof, removal of 3 x french doors and installation of sliding door to enlarged opening with all associated site works.

43C, Woodlands Park, Stillorgan, Dublin, A94CD82Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted16 May 2023
D25A/0674/WEB

To remove existing shed, relocate vehicular entrance, having a width of 3.5 metres, erect a new timber fence along front and side site boundary walls to a maximum height of 2 metres. Erect a new front side and rear extension with bay window to front, new front extension and internal refurbishment on ground floor to comprise of a sitting room, family / kitchen room, 1 bedroom & en-suite, new first floor extension with dormer and apex roofs comprising of 3 bedrooms. New roof windows to rear of existing roof, new doors and windows to side elevations and all associated site works.

6, Wilson Crescent, Mount Merrion, Blackrock, Dublin, A94E4X0Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Refused23 October 2025
D25A/0862/WEB

Apply for Retention Permission for development within the grounds of Thornhill Oaks, and Thornhill House, a Protected Structure (RPS. 936). The development consists of the retention of an following: (i) Omission of railings to perimeter of central green; (ii) Omission of 4no. x pedestrian gates to the central green; (iii) Omission of hedge to perimeter of the central green; (iv) Omission of pedestrian crossing to the road on the southern side of the central green; (v) Addition of a low metal fence to centre/side of new hedge boundaries to rear gardens of Thornhill House & Houses 60 - 64 (inclusive); (vi) Provision of a pedestrian gate to the rendered blockwork wall to the southern boundary of the rear garden of House 64; (vii) Relocation of water feature from side boundary wall of House No. 64 to inner face of wall to communal courtyard serving Houses 60 to 64.

Thornhill Oaks, Cherrygarth, Mount Merrion, Blackrock, Co. Dublin, and Thornhill House (a Protected Structure) A94W7C5Dun Laoghaire Rathdown County CouncilPermission0 reasons0 conditions0.6 km away
Granted14 January 2026
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