The Department of Public Expenditure, Infrastructure, Public Service Reform and Digitalisation has issued Circular 18/2026, setting out new principles for better regulation of critical infrastructure projects in Ireland.
The circular, published on 26 March 2026, applies to Government Departments and public bodies with responsibilities that are related to critical infrastructure in the energy, transport, water and, where applicable, housing sectors. Its stated purpose is to support faster delivery of infrastructure that enables housing and wider national development, while maintaining necessary regulatory safeguards.
The circular gives effect to Action 11.1 of the Government’s Accelerating Infrastructure Report and Action Plan, published in December 2025. That action committed the Government to issuing a circular setting out regulatory process reforms for public sector bodies involved in critical national infrastructure.
At its core, the circular is about how public bodies design, apply and review regulation. It argues that Ireland needs a regulatory regime that is “leaner, more responsive and more coherent” if critical infrastructure is to be delivered more quickly. The document states that public bodies need to address both the “stock” of existing regulation and the “flow” of new regulation. In practical terms, this means reviewing rules already in place while also testing whether new rules are needed before they are introduced.
The circular does not remove regulatory requirements, nor does it create a new planning route by itself. Instead, it sets out principles that public sector bodies must follow when simplifying and streamlining regulation for infrastructure. These principles are: necessity, effectiveness, proportionality, coherence, efficiency, timebound decision-making, transparency and accountability.
The document defines regulation broadly. It includes primary and secondary legislation, public bodies responsible for overseeing infrastructure sectors, and the licensing, permitting and consenting processes that those bodies administer. This wide definition is important because infrastructure delays can arise not only from legislation itself, but also from how approvals, licences and consents are sequenced and managed.
The circular applies to all public sector bodies with statutory, regulatory, operational or delivery responsibilities for critical infrastructure. It specifically refers to the energy, water and transport sectors, with housing included where applicable. Departments are required to bring the circular to the attention of relevant bodies under their aegis.
One of the most important features of the circular is its emphasis on evidence-based review. Public bodies are required to complete assessments of the proportionality of regulatory and consenting processes, identify reforms, and implement measures to simplify regulatory processes and approvals applied to critical infrastructure. The circular links these obligations to specific actions in the Accelerating Infrastructure Action Plan, several of which fall due in 2026.
The first principle; necessity, requires public bodies to ask whether a regulation is genuinely needed to address a clearly defined problem, risk or gap. The circular says bodies should consider whether non-regulatory measures, such as updated guidance, better coordination, stronger enforcement of existing rules, or targeted information campaigns, could achieve the same objective with fewer burdens. It also says new national measures arising from EU legislation should align closely with the underlying EU provisions and avoid unnecessary additions or unduly low thresholds.
The second principle; effectiveness, focuses on whether a regulation actually achieves its intended outcome. The circular says regulatory requirements should be evidence-based, targeted, enforceable and clearly understood by applicants, stakeholders and decision-makers. It warns that unclear rules can increase uncertainty, raise administrative burden and heighten the risk of legal challenge or overly cautious interpretation.
The third principle; proportionality, asks whether the scale and burden of a requirement match the risk being managed. The circular gives examples of disproportionate regulation, including unnecessarily detailed studies, unduly low thresholds, duplicative approvals and excessive documentation that adds time and cost without improving outcomes. It also states that requirements for extensions or amendments to existing infrastructure should be simpler than those for new developments, where the nature and scale of the change justify a lighter process.
The fourth principle; coherence, addresses the problem of overlapping or conflicting regulatory requirements. Major infrastructure projects often involve multiple public bodies and several approval regimes. The circular says public sector bodies have a duty to cooperate, share information, apply cross-sectoral best practice, align priorities and coordinate parallel processes where appropriate. It argues that a coherent regulatory landscape can reduce transaction costs and support more joined-up decision-making.
The fifth principle, efficiency, is closely linked to project timelines. The circular states that regulatory processes should achieve their intended outcomes while minimising avoidable administrative, financial and operational burdens. It says public bodies should consider combining or sequencing steps more effectively, including running consenting, licensing and permitting processes in parallel with planning where feasible. The circular also points to shared data platforms, automated workflows and integrated digital applications as possible tools for streamlining infrastructure approvals.
The sixth principle is that regulatory processes should be timebound. The circular says fixed timelines for licensing, permitting and consenting should be clearly stated in legislation or guidance. It also says public bodies should track and measure process timelines using appropriate key performance indicators. This is intended to provide greater visibility and accountability for applicants, regulators and Government.
The seventh principle, transparency, requires public bodies to make requirements, decision-making processes and timelines clear and accessible. The circular says bodies should publish guidance on processes, documentation requirements, assessment criteria and expected timelines. It also says public bodies should actively engage with applicants to provide timely advice or clarification, with the aim of improving application quality and reducing delays caused by repeated requests for further information.
The final principle, accountability, requires clear responsibility for decisions, oversight and issue resolution. The circular says public bodies should ensure that roles, reporting lines and decision criteria are clearly defined. It also says escalation, appeal and review pathways should be clear. Compliance with the circular rests with the Accounting Officer or Head of Body, and implementation will be reviewed periodically through the Senior Officials Group on Infrastructure.
The circular also requires key agencies to provide quarterly updates to Government on regulatory simplification, with a full report included in every annual report. This reporting requirement is intended to make reform a continuing obligation rather than a one-off administrative exercise.
The wider policy context is the Government’s attempt to move from high levels of infrastructure funding to faster delivery. The updated National Development Plan, published in July 2025, provides for total public investment of €275.4 billion. The Government said the plan is intended to support housing delivery, water and energy infrastructure, roads, public transport, healthcare, childcare and other public services.
The creation of the Department’s Infrastructure Division is also part of this shift. According to the Department, the division was formed in April 2025 in line with Programme for Government commitments, with the goal of accelerating delivery of critical infrastructure in Ireland.
Circular 18/2026 should therefore be read as part of a broader infrastructure reform package rather than as a standalone administrative note. The Accelerating Infrastructure Report and Action Plan identified regulatory burden, slow processes, duplication, risk aversion and inconsistent decision-making as barriers to project delivery. The new circular seeks to address those barriers by requiring public bodies to test whether regulatory steps are necessary, proportionate, coherent, efficient and accountable.
The circular is likely to be relevant for bodies involved in electricity grid development, water and wastewater infrastructure, major transport schemes and housing-enabling infrastructure. It may also affect how Departments approach the transposition of EU legislation where new rules could influence infrastructure delivery. The circular specifically instructs Departments to identify forthcoming EU legislative changes that may affect infrastructure delivery and to notify the Department of Foreign Affairs where relevant.
For project promoters, the most practical implications may be clearer guidance, more predictable timelines, better coordination between bodies and fewer duplicative processes where reforms are implemented effectively. For public bodies, the circular creates a stronger expectation that regulatory processes will be measured, justified and periodically reviewed. For the public, the central policy question will be whether faster delivery can be achieved while preserving environmental protection, public participation, legal certainty and value for money.
The circular does not claim that regulation is the only cause of infrastructure delay. Nor does it suggest that regulation should be removed where it protects the public interest. Its stated position is more limited: regulation should be necessary, proportionate and clear and approvals for critical infrastructure should be managed in a way that avoids avoidable delay.
The effectiveness of Circular 18/2026 will depend on implementation across Departments, agencies and regulators of various sectors. The document creates a common framework and a reporting requirement, but the practical test will be whether individual bodies change how they design, sequence and administer licensing, permitting and consenting processes. If those changes happen, the circular could become an important part of Ireland’s effort to accelerate housing-enabling infrastructure. If implementation is uneven, it may remain another statement of intent in a system already marked by complex procedures and long delivery timelines.
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