The Register of Planning Applications · Éire

Sunday 30 August 2026

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SD25A/0035W

Granted

Dublin - South Dublin County Council

Proposed Development

The development of a Regional Network Gateway (RNG) facility (supporting infrastructure for the MS data centres) comprising the following: • Construction of a single storey main building (RNG Building - c.1,124.3 sq.m) with air handling units (AHUs). • External plant/equipment yards including 3 no. diesel generators; sprinkler tank and pump house; electrical plant rooms, PV panels. • MV substation & Stormwater attenuation pond. • 12 no. car parking spaces (2 of which are EV parking spaces and with 1 accessible parking space). Bike parking shelter and bin store. • New road access provided from adjoining permitted estate road (granted under SDCC Ref. SD24A/0107W) and including bridge over existing watercourse. • Internal road and footpath layout, perimeter fencing, security gates and retaining wall. • Landscaped and planted areas including riparian corridor and swale. • Temporary Construction compound and parking area (including temporary bridging of existing watercourse/field drain). • All associated site development works, site lighting, boundary treatments, services/utilities provision (including underground works), and all other ancillary works. Total gross floor area of the development c.1,384.2 sq.m

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

Application Timeline

  1. Application received

    14 Feb 2025

  2. Decision due

    10 Apr 2025

  3. Decision: Grant Permission

    10 Apr 2025

  4. Grant issued

    20 May 2025

Application Details

Location
Lands at Castlebaggot, in the townland of Kilmactalway, Newcastle, Co. Dublin.
Applicant
N/A
Application Type
Permission
Planning Authority
South Dublin County Council
Site Area
33300 ha
Floor Area
1384.2 sq m

Timeline

Registration Date
14 February 2025
Status
Final Grant
Decision
Grant Permission
Decision Date
10 April 2025
Grant Date
20 May 2025
Permission Expires
19 May 2030

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.

38m
SD25A/0251WGranted14 Oct 2025

The proposed development seeks to provide a temporary construction access road including entrance from Baldonnel Road to provide for the construction of a Regional Network Gateway (RNG) facility permitted under South Dublin County Council Reg. Ref. SD25A/0035W. The works will also involve the temporary provision of a security hut, security gate, vehicle set down area, associated fencing, lighting, civils, drainage, and landscaping works. The temporary works will be removed and lands reinstated to their former use when the construction of the RNG facility is complete.

Lands located at Castlebaggot, in the townland of Kilmactalway, Newcastle, Co. Dublin

250m
SD19A/0136Invalid Application18 Apr 2019

Retention of single storey building 1 and building 2 being used as a creche to the side of the original Castle Bagot House building on site and all associated site installations.

Junior Genius Childcare Ltd, Castle Bagot House, Baldonnell, Dublin 22

250m
SD19A/0216Refuse Permission for Retention8 Jul 2019

Retention of existing single storey buildings being used as Creche to the side/rear of the original Castle Bagot House building (a Protected Structure) on site and all associated site installations.

Junior Genius Childcare, Castle Baggot House, CastleBagot, Baldonnell, Co. Dublin

283m
SD24A/0107WGranted17 Sept 2024

Development at this site on lands that include the Aylmer Road (L6003); Baldonnel Road (L2001); and lands that include a small section to the north, but are primarily to the south, of the Aylmer Road, including part of the Griffin allotments, within the townland of Kilmactawlay and Milltown, Newcastle, Co. Dublin consisting of the widening, to its south, of the existing Aylmer Road (L6003) from its junction with the Baldonnel Road (L2001) for a distance of c. 520m to the west. The widened road will tie in with the existing road to the west of a proposed new roundabout. The new roundabout will be created by utilising lands to the north and south of Aylmer Road to facilitate access to a new internal estate road (270m in length) to its south-east with a new roundabout at its end that will provide future access to the lands to its north and south. The widening of the Aylmer Road to a 7.5m wide carriageway will be almost entirely to its south and will include a proposed new shared cycle path and pedestrian footpath along its southern side, with the existing hedgerow to be retained for large lengths, and a new hedgerow to be planted where the existing one is to be removed. The proposed new shared cycle and footpath will tie in with a proposed new footpath and cycle path that will be located either side of the new internal estate road. These works will include the provision of 2 new dry attenuation basins on the south side of the widened road. The development will include all ancillary infrastructural works, street lighting, site development and ground works, including fencing, signage, and landscaping.

Within the townlands of Kilmactawlay and Milltown, Newcastle, Co. Dublin

288m
S02A/0075Refused8 Feb 2002

Retention of the change of use and the continuation of such uses of the former agricultural buildings to the following uses: Former agricultural structure subdivided into 4 units for the service of forklifts. Janitorial supplies, storage and mechanical vehicles repairs (2 units). Former agricultural structure used for the storing of cleaning equipment. Former agricultural shed used for the repair and storage of sewing machines. Former agricultural structure used for the storage of cars. Former agricultural structure used for steel fabrication, part of former agricultural building used for offices, builders store and steel fabrication. Planning permission is also sought for the retention and continuation of such uses of the following developments: Area for the storage of Civil Engineering. Plant and equipment. 40 foot steel container used for general storage. 3 mobile homes for use by staff. 20 foot steel container used for offices. 20 foot Portocabin used as staff canteen. 40 foot steel container used for the storage of architectural salvage. Hard standing for the parking of staff cars, open shed for the storage of timber fencing and panels, structure for the manufacture of timber fencing and concrete post and panels for fencing, 8 metre high cement Silo, 3 open bays for the storage of sand and gravel and aggregate, 20 foot steel containers for the storage of an electrical generator, original access road widenend and realigned with splayed entrance.

Castlebaggot, Newcastle, Co. Dublin.

347m
SD03A/0358Granted27 Aug 2003

Four bedroom dormer bungalow and double garage with wastewater treatment system and associated site works.

Ballybane, Baldonnell, Co. Dublin

368m
SD09A/0453Granted25 Nov 2009

Temporary change of use (for a period of 5 years) of an existing two storey dwelling house (c. 277 sq. m.) to use as an office. Planning Permission is also sought for an additional 3 car parking spaces and the relocation of the site's vehicular entrance from its existing position on the site's southern boundary to the site's western boundary. The planning application will also involve remedial landscaping works to remove the existing residential vehicular entrance and driveway and works involved with the provision of a new driveway linking the new site entrance with the existing property.

Castlebaggot, Milltown, Baldonnell, Co. Dublin.

368m
SD08A/0187Refused18 Mar 2008

Change of use of an existing two storey dwelling house of c.227sq.m. to use as an office.

Castlebaggot, Milltown, Baldonnell, Co. Dublin.

368m
SD09A/0124Refused27 Mar 2009

Change of use of an existing two storey dwelling house of c.227sq.m. to use as an office; planning permission is also sought for an additional 3 car parking spaces.

Castlebaggot, Milltown, Baldonnell, Co. Dublin.

395m
SD07A/0779Granted14 Dec 2007

Changes to previously granted permission (Reg. Ref. SD04A/0796): (a) revised bungalow type dwelling house; (b) relocation of proposed bungalow type dwelling house, detached garage, effluent treatment system, site boundary, entrance and all associated site works.

Aylmer Road, Castlebaggot, Baldonnel, Co. Dublin

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