Summary

• National Grid Electricity Transmission has agreed to buy approximately 29.5 hectares at Dorman Point for the proposed Tees Dock substation.
• The project has more than 1GW of contracted import and export capacity, separate from a wider 3.2GW ambition for the site.
• Outline planning permission remains outstanding, with consultation closing on 11 November and detailed design work planned for 2027.

National Grid Electricity Transmission has agreed to acquire land at Teesworks for a major electricity substation serving a planned data centre campus, advancing the infrastructure needed to support large computing installations on Teesside.

The agreement covers approximately 29.5 hectares at Dorman Point, near Redcar, where National Grid proposes to construct a 400kV substation known as Tees Dock. The project would connect the national transmission system with a private electricity network serving the wider industrial estate.

National Grid describes the project as contracted to provide more than 1GW of import and export capacity, supporting a proposed data centre development and a battery energy storage project. Tees Valley mayor Ben Houchen has separately referred to potential capacity of up to 3.2GW across the site, a broader ambition rather than the currently contracted capacity of the substation.

The land agreement was reported on 1 November following negotiations during the preceding week. A purchase price has not been disclosed, and the agreement does not establish that the proposed substation has received planning permission or that construction is under way.

A substantial connection to the national grid

Large data centres depend on electricity to operate computing equipment, communications systems, and cooling infrastructure. Installations designed for AI workloads may require particularly substantial connections, with clusters of specialised processors capable of concentrating electrical demand within relatively small physical areas.

Securing the required power can become one of the earliest commercial constraints on a project. A developer may have access to land and capital but still be unable to proceed until the transmission network can accommodate its expected demand.

National Grid’s Tees Dock proposal would provide a new high-voltage connection to the Teesworks estate, where Steel River Power operates the private electricity network. That arrangement would allow major customers on the site to receive electricity through infrastructure linked to the national transmission system.

The substation is proposed at 400kV, a figure describing its operating voltage rather than the quantity of power it can supply. Its contracted capacity is expressed separately in gigawatts, and actual electricity consumption will depend on the equipment ultimately installed and the way the connected developments operate.

A battery storage project is also associated with the proposed connection. Storage could provide flexibility in how electricity is absorbed or released, although its contribution would depend on the eventual installation, commercial arrangements, and operating requirements.

The combined infrastructure would support a site already identified for significant industrial redevelopment. However, a contracted grid connection does not establish that the proposed computing facilities have secured tenants or completed their financing.

Planning records show progress and outstanding approvals

National Grid submitted an outline planning application for the substation to Redcar and Cleveland Borough Council on 24 September. The application covers a 400kV transmission substation, temporary connection arrangements, enabling works, access, drainage, landscaping, and associated development.

The council’s public planning register continues to identify the application as valid but undecided. Consultation opened on 1 October and is scheduled to close on 11 November, while the current administrative target for a decision is 24 December 2026.

A separate screening decision in September concluded that the project did not require a full environmental impact assessment under the applicable planning regulations. That decision does not replace the requirement to secure planning permission for the proposed development.

National Grid expects to consult on detailed designs during spring 2027. Subject to the necessary approvals, the company has outlined land remediation and construction activity beginning from autumn or winter 2027.

The neighbouring data centre development is further advanced in the planning process. Redcar and Cleveland approved reserved matters for a campus at Teesworks in August 2025, following an earlier outline permission.

Those approvals concern the computing campus rather than the new National Grid substation. The two schemes depend on different development and investment decisions, even though the proposed transmission infrastructure is intended to help supply the neighbouring project.

A former steelworks becomes digital infrastructure

Teesworks occupies extensive former industrial land associated with steelmaking and related activities. Its redevelopment involves preparing sites for new industrial and infrastructure uses, including the remediation required before construction on parts of the estate.

The data centre campus has been described as a development approaching half a million square metres, with substantial space for computing facilities and associated buildings. The scale is based on approved plans rather than equipment that has already been installed.

Developers have been discussing the site with prospective computing occupiers, and reporting indicates interest from major international technology companies. No confirmed operator or completed investment agreement has been publicly established through the latest land transaction.

Large computing projects can generate substantial construction expenditure, alongside demand for electrical engineering, specialist cooling systems, communications equipment, and maintenance services. Permanent operating employment depends on the eventual design and level of automation, which can differ considerably from the workforce required during construction.

Teesworks already has industrial infrastructure and land suitable for large developments, although brownfield redevelopment can involve preparation costs and coordination between landowners, utilities, regulators, and contractors.

The new substation would form part of that supporting infrastructure rather than constitute the complete data centre project. Its delivery must be coordinated with the electricity network and the commercial timetable of future customers.

Power availability influences investment decisions

Electricity supply is increasingly important to decisions about where AI infrastructure is developed. Operators must consider connection capacity, expected delivery dates, energy costs, and the reliability of the supporting network alongside land, telecommunications, and cooling.

Substantial computing facilities can also create challenges for surrounding infrastructure because demand may grow more quickly than transmission equipment can be expanded. A proposed installation therefore needs a credible connection timetable before customers can make firm operational commitments.

Teesside’s potential 3.2GW capacity has been promoted as an opportunity to attract international investment, but it is not equivalent to the current contract for more than 1GW of import and export capability at Tees Dock.

The distinction affects how the development should be evaluated. Prospective investors can consider the scale of the longer-term ambition while assessing the infrastructure actually contracted and the planning steps still required.

The project’s location in Britain may also be attractive to customers with particular data-handling or operational requirements. Nevertheless, physical location is only one aspect of sovereignty, since control over software, data access, ownership, and service availability depends on the eventual commercial and technical arrangements.

Land agreement advances an unfinished project

National Grid’s agreement to acquire the Dorman Point land gives the proposed substation a clearer route towards development, avoiding the need to identify another site for the large connection.

Its next milestones involve the planning decision, detailed consultation, land preparation, and the contracting required for construction and operation. A builder has been linked to the project in reporting, but a final construction appointment has not been established publicly.

For the neighbouring data centre campus, substantial computing investment and the identity of an eventual operator remain separate commercial questions. The land deal advances the electricity infrastructure on which the development could depend, while the timetable for operational computing capacity remains conditional on both projects progressing.