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Planning near you · Mayo · Ref 2460708

The construction of a single data centre building located to the north of the site,…

Mullafarry and Tawnaghmore Upper , Killala , Co. Mayo

Appeal decision: REFUSED (2026-09-15)

Applicant
Not supplied in our sources
Proposed use
See council description

The story so far

Application timeline

Recorded milestones for this application. A permission is not evidence that building work has started.

  1. Application received
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: ReceivedDate

  2. Further information requested
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: FIRequestDate

  3. Further information received
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: FIRecDate

  4. Council decisionGranted with conditions
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: DecisionDate

  5. Appeal submitted
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: AppealSubmittedDate

  6. Appeal decisionRefused
    Source: NPAD

    NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e · field: AppealDecisionDate

What changed

First retained observation; this does not establish that the application is new.

Observed: 23 September 2026. This describes our archive, not an application event date.

Why it matters locally

The proposal concerns Mullafarry and Tawnaghmore Upper , Killala , Co. Mayo. Proposal excerpt: “The construction of a single data centre building located to the north of the site, with an overall gross floor area of c. 29,076 sq.m across two levels and an overall maximum height of c. 22.764m at parapet level. The d…” The appeal outcome is recorded separately from the council decision; the council decision alone gives an incomplete history.

The source records zero homes despite housing wording. Do not use this as a verified housing total.

Location & nearby applications

Mullafarry and Tawnaghmore Upper , Killala , Co. Mayo

The marker is the source location, not the site boundary. Open larger map · Map © OpenStreetMap contributors.

Nearby applications

Closest retained records in this county within 5 km, measured between map points. Proximity does not establish a shared site.

Documents & sources

Mayo County Council · Reference 2460708

View council file →
Source records and verification details

Change record: NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e

Proposal: NPAD · source SHA-256: e42eabc448c7adf5aff20f14e9dbfd997421382a12dc8cb315a1f7dd5314670e

Latest source observation retained: 2026-09-23T08:13:31.905088+00:00. Source dataset date: 2026-09-22.

Full description from the council file
The construction of a single data centre building located to the north of the site, with an overall gross floor area of c. 29,076 sq.m across two levels and an overall maximum height of c. 22.764m at parapet level. The data centre building includes data halls and associated electrical and mechanical plant rooms (c. 23,908 sq.m), an administrative and staff services block (c. 5,052 sq.m) and circulation and stairs (c. 116 sq.m). 2 no. external terraces are proposed to the east of the building (c. 309 sq.m) and an external generator yard to the south of the building (c. 5,205 sq.m) accommodating 25. no. backup / dispatchable generators and associated flues (to a height of c. 21.164m) within an enclosed compound. The construction of a sprinkler tank and pump house to the northeast of the site, the sprinkler tank is an overall height of c. 7.2 m and the pump house is a single storey building with an overall height of c. 4.15m and area GFA of c. 40.23 sq.m. The construction of an entrance hut at the main access to the south of the site, the hut is an overall height of c. 3.225m and area GFA of c. 11.6 sq.m. Construction of 2 no. site access points from the south and internal road network and circulation areas, footpaths, cyclist infrastructure, the provision of 56 no. car parking spaces (including 12 EV charging spaces and 7 disabled spaces, 3 of them EV), 20 no. cycle parking spaces, hard and soft landscaping and planting, site lighting, PV panels and plant at roof level, foul water connection connecting to existing WWTP in Killala Business Park, boundary treatments, green walls and all associated and ancillary works including underground foul and storm water drainage network and utility cables and all ancillary works and services. An EPA-Industrial Emissions Directive (IE) licence will be applied for to facilitate the operation of the proposed development. An Environmental Impact Assessment Report (EIAR) and a Natura Impact Statement (NIS) will be submitted to the Planning Authority with the planning application and the EIAR and NIS will be available for inspection or purchase at a fee not exceeding the reasonable cost of making a copy at the offices of the Planning Authority.
Application details
Reference
2460708
Site address
Mullafarry and Tawnaghmore Upper , Killala , Co. Mayo
Homes in source field
0 (proposal, not completions)
Reported floor area (m²)
0
Application type
PERMISSION
Latest reported outcome
Appeal decision: REFUSED (2026-09-15)
Date received
November 21, 2024
Decision due
April 28, 2025
Council decision date
April 25, 2025
Authority
Mayo County Council

Source: local authorities / National Planning Applications. Contains Irish Public Sector Data licensed under CC BY 4.0 where supplied by NPAD. Linked documents may have separate reuse terms.

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