Nationally significant infrastructure projects: advice on good design

Publication Year

2026

Document Status

Current

Abstract

Comprises advice on achieving good design in Nationally Significant Infrastructure Project (NSIP) applications. Covers: requirement for good design; definitions of good design; achieving good design; the National Infrastructure Strategy; design principles, parameters and codes; good design process; good design outcomes; Environmental Impact Assessment (EIA) and good design; establishing good design and main factors for applicants.

Document History

Last updated: 18 August 2026 - Updated on an initial basis to reflect some of the key changes to the Planning Act 2008 process introduced by the Planning and Infrastructure Act 2025. A further detailed review of the Planning Inspectorate’s advice page collection will commence from summer 2026. This review will inform future updates to the advice page collection to fully align content with the amended legal framework. Sourced from: https://www.gov.uk/guidance/nationally-significant-infrastructure-projects-advice-on-good-design and converted to pdf. Whilst we endeavour to capture all updates it is subject to receiving alerts from the publisher and there may be formatting or punctuation changes applied to the html version that do not affect the text. Document type: guidance. First published: 23 October 2024.

Publisher Information