What the Document Does
On July 3, 2026, the housing and communities ministry, MHCLG, put out its refreshed National Infrastructure Planning Guidance, the introductory rulebook for how England’s biggest building projects win approval. The guidance, which also reaches Wales and Scotland in limited circumstances, explains the regime created by the Planning Act 2008 for Nationally Significant Infrastructure Projects, or NSIPs: large-scale schemes across energy, transport, water, wastewater and waste.
The category is broad. The document lists wind farms, power stations, railways and major roads, airports, water reservoirs and treatment plants for water or waste. Because such projects are, in its words, “decided at the national level rather than locally”, the decision leaves the town hall and lands with a cabinet minister.
The Mechanics Here
The instrument is the Development Consent Order, which replaces ordinary planning permission for an NSIP. The relevant Secretary of State, a senior minister heading a government department, grants consent; a wind farm, for instance, falls to the Secretary of State whose brief is Energy Security and Net Zero. On closer reading, the guidance insists the call rests on planning merits within the legal and policy framework, not on political considerations. A DCO bundles other consents and licences, spells out requirements akin to planning conditions, and can, where conditions are met, authorise compulsory acquisition of land or rights over it.
Applicants vary by sector: energy cases usually come from private developers, transport cases often from public bodies such as National Highways. All file with the Planning Inspectorate, an executive agency sponsored by the same ministry, which acts for the Secretary of State at key stages and appoints the Examining Authority of one to five inspectors.
The Clock, Stage by Stage
The timetable is the story. Pre-application has no statutory deadline. Acceptance is judged against a 28-day statutory clock. Pre-examination, where local authorities, statutory bodies, communities and individuals register as interested parties and the principal issues are identified, carries no hard deadline but is expected to wrap within 4 months. Examination is mostly written, with questions, hearings where needed and site visits, and runs to six months by statute. The Examining Authority then has three months to report and recommend, and the minister three months to decide. A DCO can also carry works classed as “associated development” to support construction or operation, and, in certain circumstances, related housing. Requirements must be “discharged” before work starts on many elements, and Schedule 6 of the Planning Act allows later corrections or material and non-material changes.
The Catch Is the Detail
Two levers sit quietly in the text. Section 35 lets the Secretary of State push projects into the NSIP regime even below the thresholds in Part 3 of the Act; section 35B lets the same minister pull qualifying projects out into an alternative regime. A refused or granted decision faces Judicial Review in the High Court, with claims barred after 6 weeks. The regime has run since 2010; this 2026 edition folds in the Planning and Infrastructure Act 2025 and the responses to the Autumn 2025 consultation on streamlining, which drew input from government, industry, councils and statutory bodies.
