Data centre extension at Union Park Up4 North Hyde Gardens, Hayes

Summary of planning committee decision

Decided by Hillingdon Planning Committee on 4 Sept 2025.

75111/APP/2025/739Approved

What was proposed

The application proposed extending the existing data centre campus with a data centre, energy infrastructure, access, security and landscaping.

“Proposal: Redevelopment of site to deliver extension to existing Union Park data centre campus consisting of (a) free standing data centre building; (b) energy, power, and water infrastructure; (c) site access and internal roads; (d) site security arrangements; (e) hard and soft, green landscaping; and (f) other ancillary and auxiliary forms of development.”

Officer report

Earlier permissions

Earlier permissions approved the wider data centre campus, energy centres and demolition of the former garage building.

“The current application would sit on top of the original permission consented on the Union Park data centre campus. More specifically, it would supersede the element on the western-most section of the site, relating to data hall UP3. In effect, the development would extend the data centre building west and would facilitate an additional data hall called Union Park 4 (or UP4).”

Officer report

What officers recommended

Officers recommended approval because the scheme supported industrial intensification and economic growth and was acceptable subject to conditions and obligations.

“The proposed data centre development is an appropriate use within the Hayes Strategic Industrial Location. The significant uplift in floorspace will ensure the intensification of industrial capacity, which is supported by strategic policies. The proposed office floorspace will be ancillary to the primary data centre use and is therefore considered acceptable in principle.”

“The economic benefit of information and communications technology infrastructure is acknowledged and supported by national, regional and local planning policies. As noted under Paragraph 85 of the National Planning Policy Framework (2024), significant weight should be placed on the need to support economic growth and productivity.”

Officer report

Residents’ objections

Three neighbouring residents objected that the proposal was overdevelopment and could worsen infrastructure, health, air quality, traffic, safety and green space.

“Planning Officer Response A total of three letters of objection were received from neighbouring residents. The area is already full of industrial projects, and the proposal is overdevelopment.”

Officer report

What members discussed

Members discussed fire safety, building height, lighting, employment, public disruption and restrictions on generator testing.

“Members raised concerns about fire safety due to past incidents in the area and sought confirmation that the fire statement had been independently reviewed. The applicant had submitted a fire statement by a qualified third-party assessor. The London Fire Brigade had not commented on the application. Officers confirmed the fire strategy would be further scrutinised via condition.”

“Members asked for confirmation of the building height, which was confirmed as 32.8 metres. Members also queried the lighting, which was confirmed as a 24/7 soft glow designed to be neighbour- and ecology-friendly.”

Minutes

The vote and decision

Members unanimously agreed the officers’ recommendation and approved the application.

“Officers’ recommendations were moved, seconded and when put to a vote, unanimously agreed.”

“RESOLVED: That the application be approved…”

Minutes

Sources

  • Hillingdon Planning Committee minutes, 4 September 2025
  • Agenda and papers (council website)

Source: Plota analysis of Hillingdon's committee minutes and officer report. Quotations are the council's own words; headings and summaries are Plota's.

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At the meeting

Council
Hillingdon
Date
Thursday 4 September 2025
Recommendation
Officers recommended approval
Committee decided
Approved
Vote
Unanimous
Minutes
The council's minutes
Meeting
Agenda and papers (council website)
Application
The application (council website)

This committee's year

18 decisions in the 12 months to this meeting.

Source: Plota analysis of the committee's minutes.

Every decision by this council's committees →