Statutory timescales for non-NSIP projects: programming impacts for civils teams
Reviewed by Tom Sullivan

First reported on New Civil Engineer
30 Second Briefing
Government is being urged to legislate statutory decision timescales for non-NSIP infrastructure schemes, which currently lack the fixed timetables applied to Development Consent Orders under the Planning Act 2008. Planning specialists warn that major road, rail and flood defence upgrades falling below NSIP thresholds face unpredictable local planning authority programmes, adding cost and risk to contractors and clients. Introducing clear maximum determination periods is seen as critical to programming multi-million-pound civils works and aligning procurement, geotechnical investigations and utility diversions with realistic delivery windows.
Technical Brief
- Planning experts argue primary legislation is required; guidance alone cannot compel authorities to meet firm statutory deadlines.
Our Take
New Civil Engineer’s role in convening industry discussion through items like the British Construction & Infrastructure Awards 2026 suggests this call for statutory timescales is likely to feed into practitioner‑led lobbying rather than being a purely academic planning debate.
Because New Civil Engineer also partners on innovation challenges with operators such as Heathrow Airport, its push for clearer planning timetables will resonate most with complex but sub‑NSIP projects where uncertainty over programme is currently a bigger constraint than technical feasibility.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.


