Data centre · Kildare · 53.2202, -6.7062

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Herbata Naas

proposed Herbata Our classification · status

240 MW
Stated maximum demand
planning documents · a ceiling, not use
Grid connection. Autoproducer connection; KCC requires a formal EirGrid connection for the full load (all phases) before commencement, gas turbines limited to backup/emergency/export. "evidence of a formal grid connection from Eirgrid to cover the full electrical load of the development for all phases of the development" (Kildare CC 2460787: Planners Report - 20/08/2025, p.83)

Not available for this site: measured grid draw (no EPA annual report: only sites with ≥50 MWth of plant file one); mapped footprint; rates (no valuation-list entry matched).

Why we say it's proposed

  • Planning 2460787: appeal pending

Who runs it

  • planning applicant 'Herbata Limited' -> Herbata (developer/operator; high-confidence entity link from planning, press)
Leaflet © OpenStreetMap contributors

What the planning and licence documents say

Full 6-building campus as applied (KCC 24/60787) with FI changes (17 CCGTs, 50% CPPA); substation is a separate SID application.

SpecValueQuote and source
IT load180 MW (derived)"Each DCB will have the capacity to support 30MW of IT equipment." Kildare CC 2460787: Other Assessments - Planning Report, p.14
derived: 6 DCBs x 30MW IT; FI response reduced DC4 data hall size
Electrical demand240 MW (derived)"require on average 36MW1 base load demand across the 12month period up to a maximum of 40MW at any one time" Kildare CC 2460787: Other Assessments - Planning Report, p.58
derived: 6 DCBs x 40MW max per building (avg 36MW each = 216MW); BOS Energy appendix
Grid voltage110 kV"The proposed 8-bay EirGrid standard GIS substation and partial undergrounding of EirGrid’s 110kV overhead lines" Kildare CC 2460787: Other Assessments - Planning Report, p.22
Connection pointnew on-site 8-bay 110kV GIS substation (separate SID application to ABP, ref 315659-23 pre-app)"The proposed 8-bay EirGrid standard GIS substation and partial undergrounding of EirGrid’s 110kV overhead lines" Kildare CC 2460787: Other Assessments - Planning Report, p.22
Autoproducer connection for import and export
Connection termsautoproducer connection; KCC requires a formal EirGrid connection for the full load (all phases) before commencement, gas turbines limited to backup/emergency/export"evidence of a formal grid connection from Eirgrid to cover the full electrical load of the development for all phases of the development" Kildare CC 2460787: Planners Report - 20/08/2025, p.83
KCC planner's report (Aug 2025), recommended condition 4(a); p59 says the connection is intended to be an Autoproducer connection. Read from local OCR of a scanned PDF.
On-site generationcombined cycle gas turbines as primary on-site generation (up to 50% of energy), with gas engine top-up"Provision of 17 no. combined cycle gas turbines (including those proposed at Data Centre Building no. 4) to replace 26 no. open cycle gas turbines" Kildare CC 2460787: F.I. Received Doc. - Planning Report Addendum, p.12
FI response June 2025 switched OCGT to CCGT
Generating units17 units"Provision of 17 no. combined cycle gas turbines (including those proposed at Data Centre Building no. 4) to replace 26 no. open cycle gas turbines" Kildare CC 2460787: F.I. Received Doc. - Planning Report Addendum, p.12
CCGTs only; gas engines additional (count not stated)
Fuelnatural gas from GNI network (biomethane / hydrogen-capable)"Gas will be sourced from the Gas Networks Ireland (GNI) gas network." Kildare CC 2460787: Other Assessments - Planning Report, p.11
Running hoursno annual cap stated; turbines limited to grid-constraint backup at System Operator request, emergency use and export; expected annual hours to be submitted before construction"expected annual running hours of onsite gas turbines shall be submitted to the planning authority prior to the commencement of construction" Kildare CC 2460787: Planners Report - 20/08/2025, p.84
KCC planner's report (Aug 2025), recommended condition 4(a)-(b), pp83-84. Read from local OCR of a scanned PDF.
Coolingdirect air cooling with adiabatic trim"90% of the year. During the remaining period, water may be needed to trim the cooling temperatures within the data halls by use of adiabatic" Kildare CC 2460787: Other Assessments - Planning Report, p.17
direct air cooling used for over 90% of the year
Water112 m3/day (derived)"the current Pre-Connection Enquiry shall only validate a water usage for the proposed development of 1.3 litres per second" Kildare CC 2460787: Planners Report - 20/08/2025, p.102
derived: 1.3 l/s x 86,400 s = 112 m3/day; Uisce Éireann pre-connection ceiling in recommended condition 72(i), not a stated daily demand. Read from local OCR of a scanned PDF.
Floor area163,566 m2 (derived)"6 no. two-storey DCBs are proposed, each with a total cumulative floor area of 27,261m2" Kildare CC 2460787: Other Assessments - Planning Report, p.14
derived: 6 x 27,261m2 as applied; FI reduced DC4 data hall to 13,683m2
Data halls48 halls (derived)"admin block located at the front, 8 no. data halls in the middle" Kildare CC 2460787: Other Assessments - Planning Report, p.14
derived: 8 halls x 6 DCBs
Phasing3 phases: DCB1-2 (+substation), DCB3+5, DCB4+6"The construction works associated with the development will be undertaken in three phases" Kildare CC 2460787: Other Assessments - Planning Report, p.20
Dates10-year permission; construction 8-9 years"It is envisaged that construction will take 8 – 9 years" Kildare CC 2460787: Other Assessments - Planning Report, p.22
10-year permission sought (p22); KCC granted Aug 2025, appealed Sept 2025
Heat reusedistrict heating from waste-heat boilers on 2 gas turbines, up to 20MWth"available maximum heat output is assumed at 10MWth per turbine, with a total capacity of 20MWth possible when both turbines are available" Kildare CC 2460787: Other Assessments - Planning Report, p.12
RenewablesCPPAs for at least 50% of demand: 168MW wind + 336MW solar over 8 years; rooftop PV"contract 21MW of Wind and 42MW of Solar each year for 8 years. This totals only 168MW Wind and 336MW of Solar" Kildare CC 2460787: F.I. Received Doc. - Updated Energy Strategy Report, p.14
FI raised target from 30% to 50%

Every value is quoted from the document and page cited; the quote was checked against that page's text. "Derived" means the reader worked it out from stated figures (shown in the quote). Planning and licence figures are design or permitted values, not measured use; values derived from an EPA annual environmental report (AER), mostly water, are reported use for that year. The note under each quote gives the scope and whether a demand figure is a maximum or an average.

Planning history

ReceivedRefWhatDecisionBuilt?
2024-08-132460787
for a Data Centre and will comprise of: The demolition of 3 no. dwelling houses, associated garages and farm outbuildings / agricultural buildings (total floor area 1,591m2); The construction of 6 no. two storey data centre buildings, each with loading bays, external plant area including electrical and mechanical plant rooms, fuel compound, sprinkler tanks and associated ancillary development; Data centre building Nos. 1, 2, 3, 4 and 6 will consist of: a data hall (24,756m2, overall height 19m), an administration block (2,505m2 overall height 15m) and include an external screened plant area of
CONDITIONALappeal pending
2024-08-012460740
for a Data Centre and will comprise of: The demolition of 3 no. dwelling houses, associated garages and farm outbuildings / agricultural buildings (total floor area 1,591m2); The construction of 6 no. two storey data centre buildings, each with loading bays, external plant area including electrical and mechanical plant rooms, fuel compound, sprinkler tanks and associated ancillary development; Data centre building Nos. 1, 2, 3, 4 and 6 will consist of: a data hall (24,756m2, overall height 19m), an administration block (2,505m2 overall height 15m) and include an external screened plant area of
N/Awithdrawn/invalid/undecided
Appeal 323677 (2460787) · pending

Sources for this page

planning:KILDARE/2460740 · planning:KILDARE/2460787 · acp:323677

Joined from OpenStreetMap, the planning register, An Coimisiún Pleanála, EPA licences and annual reports, the Tailte Éireann valuation list and Building Control. Data built 2026-10-10.