Planning precedent report

Redesign of the permitted no. 40 Thornhill Oaks (D20A/0432, ABP308150-20) to provide a part single/part two storey at this location. No works are proposed to Thornhill House, a Protected Structure (RPS 936).

Permission is sought for the demolition of an existing chimney and reinstatement

A) removal of existing chimney to side and existing extensions to side and rear, and b) the construction of a new two-storey extension to side of dwelling, extending the existing ridge height and roof profile, with rooflights to front, c) new single-storey extension to rear, with rooflight, d) alterations to existing flat roof dormer to rear, with small roof terrace to side gable at attic level, e) alterations to fenestration and main entrance to front of dwelling, and all associated site works.

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.

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.

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.