A new National Planning Policy Framework (NPPF) was published on 17 August 2026. For developers and property professionals, the practical question is not simply what changed in planning policy, but what the new framework means for the environmental evidence needed to make a site suitable for development.
The direction is clear: the planning system continues to support the effective use of land, including suitable brownfield sites, while retaining explicit requirements around ground conditions, contamination, land instability, pollution and flood risk. Brownfield support does not remove the need to understand what is in, on or beneath a site before development proceeds.
When does the 2026 NPPF apply?
The decision-making policies in the 2026 Framework are material considerations from the day it was published. The implementation annex also sets out the arrangements for plan-making, including which plans should now be prepared in accordance with the new Framework and where earlier transitional arrangements continue to apply.
For a live planning application, this matters because a project team should be working from the current decision-making policies rather than assuming that wording carried over from the December 2024 framework remains the complete national policy position.
Brownfield development is encouraged, but site suitability still has to be demonstrated
The new NPPF continues the strong policy emphasis on making effective use of land. It expects mayors and local planning authorities to take a proactive role in identifying and helping to bring forward land that may be suitable for development, including sites on brownfield registers and land in public ownership.
That support for brownfield development is commercially important. Previously developed land can often offer strong planning and regeneration opportunities, but former industrial, commercial, transport, storage or extractive uses can also create environmental constraints that need to be understood before design, acquisition or construction decisions are fixed.
Ground conditions now sit in a clear national decision-making policy
Policy P2 of the 2026 NPPF deals specifically with ground conditions. Sites proposed for development should be suitable for their proposed use, taking account of risks from land instability or contamination, including risks associated with current and former activities such as mining or fuel storage.
The Framework also states that adequate site assessment information, prepared by a competent person, should be available to inform those considerations. Where contamination or land-stability issues affect a site, responsibility for securing a safe development rests with the developer and/or landowner.
This is where a proportionate Phase 1 Desktop Study is often useful. It can establish the site’s history, environmental setting, potential pollutant linkages and whether further investigation is justified. Where intrusive evidence is needed, the next step may be a Phase 2 Ground Investigation rather than simply adding more desk-based material.
Former mining areas still require site-specific consideration
The explicit reference to mining within Policy P2 is important for development in former coalfield and other mining areas. A planning strategy should distinguish between general mining legacy and a site-specific risk that could affect foundations, ground stability, mine entries or the proposed layout.
Where a site lies in an area affected by coal mining legacy, a Coal Mining Risk Assessment may be required to establish whether recorded or unrecorded workings, mine entries or other mining features could affect the development.
Pollution remains wider than contaminated soil
The NPPF’s pollution policy requires development proposals to be appropriate for their location and to consider likely effects on health, living conditions and the natural environment. In practice, the evidence required depends on the site and proposed use.
For one scheme, the critical issue may be contaminated land. For another it may be air quality, noise, lighting, hazardous-installation consultation zones or a combination of constraints. The correct approach is to identify the material planning risk first and commission the evidence that answers it.
Flood risk, drainage and ecology should still be considered early
The new Framework does not turn environmental reporting into a standard checklist that every development must complete. Flood risk, drainage, biodiversity and ecological requirements remain dependent on location, scale, receptors and the nature of the proposal.
However, early screening can prevent avoidable redesign. A layout that has already fixed access, levels, building footprints and drainage space can be expensive to change if later work identifies flood constraints, unsuitable infiltration conditions, protected habitat or another environmental limitation.
Where those issues are relevant, EnviroSolution can coordinate SuDS, drainage and flood work and ecology surveys alongside the ground-risk elements of the planning submission.
What should developers do differently?
The 2026 NPPF does not mean that every planning application suddenly needs more reports. It does reinforce the need for environmental evidence to be proportionate, current and tied to the actual site risk.
- Check the planning context early: understand the current NPPF, local plan and validation requirements before fixing the submission scope.
- Use site history intelligently: brownfield status alone does not prove contamination, but former uses can identify risks that deserve investigation.
- Separate desk study from intrusive evidence: use the conceptual site model to decide whether Phase 2 work is actually needed.
- Identify mining and stability risks: do not treat former mining as a generic search result where a site-specific assessment is required.
- Coordinate disciplines: flood, drainage, ecology, air quality, acoustics and ground risk can affect the same layout and programme.
If you are preparing a planning application or reviewing a brownfield site, EnviroSolution can help identify the environmental reports that are proportionate to the project. Use the structured enquiry builder to send the site location, plans and planning information for review.