Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Environmental impact assessment definition

What does Environmental impact assessment mean? An environmental impact assessment (EIA) is the statutory process used in planning and other consenting regimes to identify, evaluate and mitigate the likely significant effects of a proposed project on the environment before planning permission or other development consent is granted. It is defined in legislation: in England and Wales by the Town and Country Planning (Environmental Impact Assessment) Regulations 2017 (with sectoral EIA regimes, including for nationally significant infrastructure and marine works); in Scotland by the Town and Country Planning (Environmental Impact Assessment) (Scotland) Regulations 2017; in Northern Ireland by the Planning (Environmental Impact Assessment) Regulations (Northern Ireland)...

EIA for nationally significant infrastructure projects: screening, scoping, environmental statements and consultation in the DCO regime, with cumulative/transboundary effects and forthcoming Environmental Outcomes Reports under the Planning Act 2008

Published by a LexisNexis Planning expert

Practice notes

Context

The Planning Act 2008 (PA 2008) establishes a consent framework for nationally significant infrastructure projects (NSIPs) spanning energy, transport, water, waste water, and waste. Development consent order (DCO) applications are determined by reference to National Policy Statements (NPSs), which express national policy for NSIPs. See Practice Notes: Permission for nationally significant infrastructure projects and National Policy Statements. environmental impact assessment (EIA) is the process for examining a project’s likely significant environmental effects and factoring them into the decision on whether consent should be issued. It ensures environmental considerations receive appropriate weight alongside economic and social matters, and it facilitates public participation in environmental decision-making. In the DCO context, EIA is required in defined situations under the Infrastructure Planning (Environmental Impact Assessment) Regulations 2017, SI 2017/572 (the EIA Regulations).

Legislation and guidance

The EIA Regulations set out how to determine whether an EIA is necessary for a proposed development, and the procedure to follow where it is. Originating in EU law, the EIA Regulations were made under the European Communities Act 1972 (ECA 1972)...

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Web page updated on 27/05/2026

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