PlanningRegister.ie
South Dublin County Council · SD20A/0283/EP

Grange Castle Business Park, Nangor Road, Clondalkin, Dublin 22

Approved in Jul 2026.

  1. 27 May 2026Received
  2. 21 Jul 2026Approved
Status
Approved
Decision
Approved extension of duration of permission · 21 Jul 2026
Council
South Dublin County Council
Type
Extension Of Duration Of Permission
Site
16.08 ha

What’s proposed

In plain English

New administration building and two data centres at Grange Castle

The applicant wants to demolish an existing house and build a new administration building and two data centres. This project includes new parking, electrical infrastructure, and a new access road.

  • Demolishes an existing vacant house, garage, and outhouse
  • Includes 168 permanent car parking spaces and 40 cycle spaces
  • Adds a new western access road with a bridge over the Griffeen River
  • Includes a temporary construction car park with 802 spaces
Written by AI from the council’s description

An AI model rewrote the council’s description below in everyday words on 9 Oct 2026. It was told to use only that text, and every number it wrote was checked against it. It says nothing about whether the application will be approved. The council’s wording and planning file are the record.

The council’s description

Demolition of existing single storey vacant house, garage and outhouse (total gross floor area (GFA) c.291.2sq.m) and removal of existing temporary construction car park; Construction of a single 1-4 storey Central Administration Building and 2 2-storey (with mezzanine) data centres (DUB14 & DUB15) all to be located west of data centres DUB9, DUB10, DUB12 & DUB13 within the MS campus; The Central Administration Building (c.6.03m to c.19.85m high) will comprise central office administration, with staff cafeteria, staff gym and reception (GFA c.3,520sq.m), with provision of PV panels on the roof; each data centre (c.15.6m high to parapet height and c.18.65m to top of roof plant) will include data halls, admin blocks (comprising offices, canteen, loading dock, storage and ancillary areas) and a variety of mechanical and electrical plant areas/structures including Modular Electrical Rooms (MERs), battery rooms and transformer areas. GFA of DUB14 is c.28,072sq.m and GFA of DUB15 is c.28,173sq.m (c.56,246sq.m in total); DUB14 will also include 21 diesel generators and associated sub-stations (E-houses) and 11 mechanical flues (each c.30.75m high); Provision of a gas generator compound (to serve DUB15) containing 20 generators, 5 E-houses and 5 flues (c.25m max height); Provision of a Gas Networks Ireland gas skid including 3 kiosk buildings; Expansion of existing electrical sub-station compound (originally granted under SD07A/0632) to provide 3 additional transformer bays. 3 E-houses and 1 control room, 2 auxiliary transformers; 2 sprinkler tank and pump house areas, 1 additional rainwater harvesting plant; Provision of 168 permanent car parking spaces and 40 cycle parking spaces; Provision of additional western access to the MS campus (to serves the Central Administration Building) from the Business Park estate road (including bridge over the Griffeen River) with existing temporary access to be extinguished; Physical integration with the remainder of the existing MS campus (including internal access roads and landscaping) with associated modifications to the western boundary of the DUB09/DUB10/DUB12/DUB13 data centre development as permitted under SD16A/0088; Provision of a new temporary construction car park (with 802 car spaces, shuttle bus stop and shelter) on site north of the main entrance to the business park; Total gross floor area of the development will be c.59,766sq.m; All associated site development works, drainage and services provision, landscaping, boundary treatments (including security fencing) and associated works; An Environmental Impact Assessment Report (EIAR) has been submitted with this application; The application relates to a development which comprises an activity requiring an integrated pollution prevention and control (IE) licence

Planning details

Reference
SD20A/0283/EP
Local authority
South Dublin County Council
Status
Granted · register status “Decision”
Received
27 May 2026
Observations close
1 Jul 2026 (closed 128 days ago)
Decision due
21 Jul 2026 · decided 21 Jul 2026
Decision
Grant extension of duration of permission on 21 Jul 2026
Site area
16.08 ha from the mapped boundary, not the council's figure
Applicant
Microsoft Operations Ireland Limited council register

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Nearby 2 · 500 m · 12 months

Distance
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Homes nearby

Development land nearby

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Zoning

C2.1 — Economic development and employment

Zoned for employment uses. Housing is not the intended use here.

Protections nearby 250 m

Flood area nearby (OPW maps). floodinfo.ie ↗

  • EPA-licensed facility · 8
    Pfizer Ireland Pharmaceuticals; P0693
  • Natural Heritage Area (incl. proposed) · 1
    Grand Canal
  • Recorded monument · 2
    Concentric enclosure; R183273

Where this comes from

National planning feed (NPAD), fetched 11 Sept 2026, 18:51.

Source: National Planning Application Database · fetched 11 Sept 2026, 18:51
SourceLicenceFetchedLink
National Planning Application DatabaseCC BY 4.011 Sept 2026, 18:51open
Summary

SD20A/0283/EP is a planning application to South Dublin County Council for demolition of existing single storey vacant house, garage and outhouse (total gross, received on 27 May 2026; permission was granted on 21 Jul 2026.