UK to streamline planning rules to unlock grid infrastructure

Proposed changes to planning rules for grid equipment

The Department for Energy Security and Net Zero is consulting on changes to permitted development rights for electricity network infrastructure. The proposals would raise the size threshold for substations that can be installed without a full planning application. Currently set at 29 cubic metres, the limit would increase to 45 cubic metres under the new rules.

This change affects electricity network operators holding licences under the Electricity Act 1989. These companies already benefit from permitted development rights under the Town and Country Planning (General Permitted Development) (England) Order 2015. Specifically, Schedule 2, Part 15, Class B allows certain developments to proceed without planning permission. However, substations larger than 29 cubic metres require applications to local planning authorities.

The Independent Networks Association has reported that 76% of substations needed for electric vehicle charging infrastructure exceed the current threshold. Planning permissions for these projects typically take five months and cost at least £20,000 per application. Consequently, the proposed changes could reduce both timescales and costs for network operators installing equipment to support renewable energy connections and EV charging points.

How the consultation proposes to change existing rules

The consultation document sets out several specific proposals. Proposal 7 forms the centrepiece, raising the substation chamber size limit to 45 cubic metres through permitted development rights. This would remove the requirement for smaller substations to go through full planning processes. As a result, local authorities would face reduced administrative burdens while network reinforcement projects could proceed more quickly.

The proposals also extend permitted development rights to sensitive locations. National Parks, National Landscapes, and Heritage Coasts would be included in the new framework. However, substations between 30 and 45 cubic metres in these areas would require prior approval for siting and appearance. This creates a balance between faster deployment and local oversight in protected areas.

Beyond substations, the consultation addresses broader consenting processes for network assets. Overhead lines currently require consent under Section 37 of the Electricity Act 1989. Meanwhile, high-voltage lines of 132kV or above running for more than 2km fall under the Nationally Significant Infrastructure Projects regime through the Planning Act 2008. The reforms aim to reduce delays for routine distribution upgrades that fall outside these categories.

Underground cables and certain access rights also feature in the proposed changes. Some of these assets already qualify as permitted development. Nevertheless, the consultation seeks to clarify and extend these provisions to cover a wider range of routine grid works. This would reduce bureaucratic obstacles for network operators carrying out essential maintenance and capacity upgrades.

Why network capacity has become urgent for net zero targets

The UK’s Clean Power 2030 target requires substantial expansion of renewable generation capacity. Wind and solar projects need connection to the distribution network before they can supply electricity to homes and businesses. Similarly, the rollout of electric vehicle charging infrastructure depends on local network capacity to handle increased electricity demand. Without faster grid reinforcement, both renewable energy projects and EV charging installations face delays.

Current planning processes create significant bottlenecks for this expansion. A five-month planning timeline for a single substation can delay entire renewable energy projects or EV charging networks. For network operators installing multiple substations across a region, these delays compound quickly. The £20,000 minimum cost per planning application also adds up when operators need dozens of substations to serve new developments or renewable installations.

Distribution network operators report that planning delays affect project viability in several ways. First, prolonged timescales increase financing costs as projects remain in development longer. Second, uncertainty about planning outcomes makes it harder to commit resources to network upgrades. Third, developers of renewable projects or EV charging networks face their own delays while waiting for grid connections. These combined factors slow the pace of decarbonisation across multiple sectors.

The government’s National Infrastructure Strategy has identified planning reform as essential for delivering net zero commitments. Energy network infrastructure sits alongside transport, water, and digital networks as critical enablers of economic growth and environmental targets. However, electricity networks face particular pressure because they must accommodate both new renewable generation and rising demand from transport and heating electrification. Therefore, reforms to permitted development rights aim to remove obstacles that hinder necessary infrastructure deployment.

Planning thresholds and approval requirements in detail

Under existing rules, network operators can install substations up to 29 cubic metres without planning permission. This size typically accommodates smaller local distribution substations serving residential areas or small commercial sites. Larger substations serving industrial facilities, EV charging hubs, or multiple renewable energy connections exceed this threshold. Consequently, they require full planning applications to local authorities.

The proposed 45 cubic metre threshold would cover a significantly larger proportion of network infrastructure projects. For example, substations serving rapid EV charging stations along motorways typically need greater capacity than the current limit allows. Similarly, substations connecting medium-scale solar farms or small wind projects often fall into the 30-45 cubic metre range. By raising the threshold, the reforms would enable these projects to proceed without lengthy planning processes.

Nevertheless, the consultation recognises that larger substations have greater potential for visual and environmental impacts. This explains why the proposals include prior approval requirements for sensitive areas. Substations between 30 and 45 cubic metres in National Parks, National Landscapes, and Heritage Coasts would need approval for their siting and appearance. This allows local planning authorities to ensure new infrastructure fits appropriately within protected landscapes.

The prior approval process differs from full planning permission in important ways. It focuses specifically on location and design rather than the principle of development. This narrows the scope of assessment and typically shortens timescales compared to full applications. Moreover, it provides local authorities with meaningful oversight while avoiding the comprehensive assessments required for full planning permission. As a result, the proposals attempt to balance speed of deployment with environmental protection.

Critical details about the proposed reforms

• The size threshold for substations qualifying as permitted development would increase from 29 to 45 cubic metres, removing planning permission requirements for a larger range of network infrastructure.
• Substations between 30 and 45 cubic metres in National Parks, National Landscapes, and Heritage Coasts would require prior approval for siting and appearance only, not full planning permission.
• Current evidence shows that 76% of substations needed for electric vehicle charging infrastructure exceed the existing 29 cubic metre threshold, creating widespread planning delays.
• Planning applications for substations currently take an average of five months and cost at least £20,000 per project, adding significant expense and delay to network reinforcement.
• The reforms build on existing permitted development rights under Schedule 2, Part 15, Class B of the Town and Country Planning (General Permitted Development) (England) Order 2015.
• High-voltage infrastructure above 132kV running for more than 2km already falls under the Nationally Significant Infrastructure Projects regime, which uses Development Consent Orders rather than standard planning permission.
• The consultation also addresses consenting processes for overhead lines, underground cables, and land access rights beyond substation thresholds alone.

Commercial implications for different business sectors

Renewable energy developers stand to benefit directly from faster grid connection timescales. Solar and wind projects cannot generate revenue until connected to the distribution network. Planning delays for necessary substations therefore postpone income streams and increase financing costs. Furthermore, developers often face contractual penalties if projects miss connection dates agreed with network operators. By reducing substation planning timescales, the reforms could improve project economics for renewable installations across size ranges.

Electric vehicle charging networks similarly depend on timely grid reinforcement. Charging hub operators typically need substations installed before they can commission charging equipment. A five-month planning delay for a substation pushes back the entire project timeline. Additionally, property owners considering EV charging installations for staff or customers face uncertainty about grid capacity. Faster network upgrades would make it easier for businesses to plan charging infrastructure investments with confidence about delivery timescales.

Manufacturing facilities and industrial sites requiring additional electricity capacity would also see shorter timescales for network connections. Businesses expanding operations or installing new equipment often need substation upgrades to handle increased loads. Under current rules, planning delays can hold up wider investment projects. For instance, a manufacturing expansion might need to wait six months while a substation planning application progresses. The proposed changes would reduce this constraint on business growth and capital investment.

Property developers building new residential or commercial sites already factor in network connection timescales. However, planning delays for substations add uncertainty to project programmes. Developers cannot always predict how long planning applications will take or whether local authorities will approve proposals. This uncertainty affects land acquisition decisions and financing arrangements. Therefore, clearer and faster routes for substation approval would improve project predictability for the development sector.

Public sector organisations procuring sustainable energy solutions would benefit from reduced project delivery times. Schools, hospitals, and local authority buildings increasingly seek on-site renewable generation or EV charging facilities. These installations often require network reinforcement through new or upgraded substations. Shorter planning timescales would allow public bodies to deliver environmental commitments more quickly. Moreover, reduced planning costs could free up budget for additional sustainability measures rather than administrative processes.

Network operators and permitted development rights

Electricity network operators hold licences under the Electricity Act 1989 and operate as regulated monopolies within defined geographic areas. These companies must invest in network capacity to meet demand growth and connect new generation. However, they face regulatory price controls that limit the costs they can recover from customers. Consequently, reducing planning expenses and timescales improves their ability to deliver infrastructure within regulatory budgets.

Distribution network operators currently use permitted development rights where possible to avoid planning costs. The Town and Country Planning (General Permitted Development) (England) Order 2015 provides the legal framework for these rights. Nevertheless, the 29 cubic metre threshold forces many projects through full planning processes. Network operators report that administrative costs and management time associated with planning applications divert resources from infrastructure delivery. Therefore, raising the threshold would allow these companies to focus capital and expertise on engineering work rather than planning procedures.

National Grid and regional distribution network operators have called for planning reform as part of broader efforts to accelerate grid reinforcement. The Planning Inspectorate examines Nationally Significant Infrastructure Projects under Development Consent Order processes for major transmission infrastructure. However, routine distribution upgrades fall outside this regime and instead go through local planning systems. This creates inconsistency in how different scales of infrastructure are approved, with smaller but equally essential projects facing disproportionate delays.

The proposals align with National Policy Statement EN-5, which prioritises electricity network infrastructure for the low-carbon transition. This policy framework recognises that grid capacity is fundamental to achieving net zero targets. By streamlining consenting for distribution network upgrades, the reforms support policy objectives already established for transmission infrastructure. Nevertheless, implementation will depend on consultation feedback and how the government balances competing concerns about visual impact, environmental protection, and infrastructure delivery.

Implementation considerations and next steps

The Department for Energy Security and Net Zero is running a formal consultation on these proposals. Stakeholders including network operators, renewable energy developers, local authorities, and environmental groups are providing feedback. This consultation process will shape the final regulations and determine whether additional safeguards or modifications are necessary. Therefore, businesses affected by these changes should monitor consultation outcomes and any subsequent policy announcements.

Once finalised, the new permitted development rights would require amendments to existing regulations. The Town and Country Planning (General Permitted Development) (England) Order 2015 would need updating to reflect the higher size thresholds and extended geographic scope. Parliamentary procedures for such changes typically involve consultation analysis, drafting of statutory instruments, and laying before Parliament. This process normally takes several months after consultation closes.

Local planning authorities will need guidance on implementing the new rules once they take effect. Planning officers must understand which developments qualify as permitted development and which require prior approval in sensitive areas. The government typically issues planning practice guidance alongside regulatory changes to ensure consistent interpretation. Network operators will also need clear guidance on documentation and notification requirements even when full planning permission is not needed.

Businesses planning infrastructure projects should consider how these reforms might affect their timelines. Projects currently in planning could potentially benefit from faster processes if reforms take effect during their development phase. However, firms should not delay necessary planning applications while waiting for regulatory changes. Instead, engaging with compliance support for environmental and planning requirements can help navigate current rules while preparing for potential changes ahead.

The reforms form part of wider government efforts to accelerate infrastructure delivery for net zero targets. Related initiatives include reforms to the Nationally Significant Infrastructure Projects regime and updates to National Policy Statements for energy infrastructure. Together, these measures aim to remove planning barriers that slow essential investment in low-carbon technologies and supporting infrastructure. Consequently, businesses involved in renewable energy, EV charging, or energy-intensive operations should track multiple policy workstreams affecting their sectors.

Where to find authoritative information and guidance

The Department for Energy Security and Net Zero has published the full consultation document on proposed changes to permitted development rights. This document provides detailed technical specifications and policy rationale. Businesses can access the consultation and submit responses through the official government consultation portal at the department’s gov.uk pages.

The Town and Country Planning (General Permitted Development) (England) Order 2015 sets out current permitted development rights for electricity infrastructure. The full text is available through legislation.gov.uk, including Schedule 2, Part 15, Class B covering electricity network developments. This source provides the legal baseline against which proposed changes would operate.

For guidance on planning processes and requirements, local planning authorities maintain planning portals with information about application procedures and timescales. The Planning Portal at planningportal.co.uk offers resources for understanding different types of planning permission and when they apply. Additionally, the Royal Town Planning Institute provides professional guidance on infrastructure planning matters.

Businesses seeking support with net zero compliance and carbon reporting should consider how infrastructure planning reforms connect to broader environmental requirements. Network capacity affects the feasibility of on-site renewable generation, which increasingly features in corporate sustainability strategies and supply chain requirements. Understanding these connections helps businesses make informed decisions about energy infrastructure investments.

The Planning Inspectorate examines applications for Nationally Significant Infrastructure Projects and publishes guidance on Development Consent Orders. While most distribution network upgrades fall outside this regime, the Planning Inspectorate website provides useful context about how major energy infrastructure projects are assessed. This helps businesses understand the regulatory landscape for different scales of network development.