Site planning risk brief

RETENTION: Retention of modifications, as constructed, to the rear (southeast) elevated single and 2-storey extensions (at 3rd & 4th floor levels) which were granted permission under application 2757/17. The modifications to the permitted development comprise; • Construction of extensions at 1st & 2nd floor levels under the permitted structure • Construction of enclosed plantrooms at 4th floor (roof) level • Omission of permitted lift shaft from 1st floor to 3rd floor • Other minor modifications to permitted fenestration

The development will consist of the construction of a 5-storey patient bed lift extension on Holles Street to serve the ground, first, second, third and fourth floors of the hospital. Associated works include: internal alterations to create lift landings at each level within an existing stairwell; alterations to window openings to Holles Street to facilitate access to the bed lift at each level; provision of new access corridor across existing roof at fourth floor level and all ancillary and related works.

PROTECTED STRUCTURE RETENTION PERMISSION Further to previously granted permission (application No.3622/14, application No:6031/06, and application No. 5091/07) at 58 - 61 (inclusive), Lower Mount Street, Dublin 2. (4 No. protected structures), full planning permission is now being sought by the National Maternity Hospital for "Retention Permission" to retain the modular laboratory extension to the rear of the existing properties which was previously granted temporary planning permission under planning reference 3622/14. The retention permission extends to the one storey modular building at basement level which connects back to property No. 60, providing access to the basement level of the existing properties. Air handling plant associated with this temporary building is located on the roof of this building, and is screened from view. An external stair provides maintenance only access to the roof of the temporary building. All elements form part of this retention permission. The building use is clinical laboratory facilities.

PERMISSION & RETENTION: PROTECTED STRUCTURE: 1. Retention permission for Change of Use (residential use-single dwelling)(formerly Office). 2. Retention Permission for alterations carried out to include: removal of modern internal partition walls and modern doors, removal of redundant modern services, and removal of modern office fit-out. 3. Planning Permission for proposed works to include: (A) the removal of existing single storey 4.8 sqm. structure to rear of building, removal of later interventions and removal of redundant services. (B) Construction of a two storey over basement extension 29.4 sq. metres to the rear with external terrace at second floor 16sq. metres, with enabling alterations to rear facade, new extension 9.2 sq. metres at third floor, to existing stair return providing new internal stair connection between second and third floor with enabling alterations to rear facade and roof. (C) Works to the existing building to include: conservation and refurbishment of the building fabric, including alterations to plan-form, forming and altering door openings, upgrading of services throughout including new sanitary provisions, provision of new external glazed door and sidelights to front facade at basement level, upgrading of building fabric to provide fire resisting construction to provide protected escape route from upper floors to street, and provision of domestic scale Fire suppression system. (D) Works to external facade consisting of: Cleaning masonry, removal of overpainting to masonry elements, pointing renewal and masonry repair to front facade, Cleaning and refurbishment of railings, plinth, and paving, Replacement of modern windows to front facade with timber double glazed sliding sash windows, Replacement of existing door case with new timber door case, sidelights and elliptical overlight, Repair works to gable wall, rear facade and rear return, replacing existing concrete window sills with granite sills, replacement of uPVC windows and timber double glazed sash windows, Replacement of uPVC rainwater goods with cast iron rainwater goods. Renewal of slate roof, renewal of existing gutters. Repairs to parapet walls and chimney stacks including provisions of new chimney pots.

PROTECTED STRUCTURE: the development will consist of works to a protected structure, comprising structural and fire safety upgrade works to floors, removal of non-original partitions, and the addition of a lobby at basement level for increased fire safety.

PROTECTED STRUCTURE: the development will consist of refurbishment and material change of use of existing basement from offices to residential use as a single dwelling residence. To facilitate the proposed change of use the dwelling will provide 3 bedrooms, 3 walk-in wardrobes, 1 bathroom, 1 shower room, 3 WCs, 1 kitchen/dining room, 1 service kitchen, 1 living room, 1 front porch and associated works.