The new NPPF 2026

On 17 August 2026, the Government published a substantially revised National Planning Policy Framework (NPPF), following a consultation that commenced in December 2025. The reforms came into force immediately and represent the most significant restructuring of national planning policy since the NPPF was first introduced.

Much of the media attention has focused on the Government’s headline proposal to promote development around railway stations. However, the changes go significantly further. The revised NPPF introduces a new rules-based structure, strengthens support for housing delivery and economic growth, reforms Green Belt policy, promotes infrastructure and clean energy projects, and seeks to reduce inconsistencies between local planning authorities.

A Fundamental Reorganisation of National Planning Policy

The most important change may not be any individual policy but the way the NPPF itself has been rewritten.

Previous versions of the NPPF were organised around broad policy objectives and principles. The August 2026 version separates policies into two distinct categories:

• policies relating to plan-making; and
• policies governing planning decisions.

Policies are now coded and drafted in a more prescriptive and systematic way, with the Government aiming to create a clearer and more predictable planning system. Development plan policies that are materially inconsistent with the new national decision-making policies may carry much more limited weight in future, particularly where those policies have not been updated to reflect the revised framework.

In practical terms, this may reduce the ability of individual authorities in some circumstances to apply locally distinctive approaches in decision making where those approaches conflict with national policy. For applicants, this should increase certainty and improve consistency across different planning authority areas.

The Emergence of a Stronger Presumption in Favour of Development

A recurring theme throughout the revised NPPF is the Government’s desire to accelerate development and increase housing delivery.

The revised framework adopts a stronger and more clearly articulated presumption in favour of sustainable development and seeks to establish clearer national parameters for decision-making. The Government’s stated objective is to create a planning system that is more supportive of growth and less susceptible to delay and uncertainty.

Whilst planning applications will continue to be determined in accordance with the development plan unless material considerations indicate otherwise, national planning policies are now intended to play a more prominent role in decision-making, although planning applications continue to be determined within the statutory plan-led system.

For applicants, this is likely to create additional opportunities to challenge restrictive local policies where they are inconsistent with the revised national framework.

Station-Led Development: Potentially a Game Changer

The most widely discussed reform is the introduction of a new station-led development policy.

Policy L3 establishes a policy presumption in favour of residential and mixed-use development within reasonable walking distance of well-connected train, tram, underground and light rail stations. The policy is accompanied by minimum density expectations of 35 or 45 dwellings per hectare depending on the level of transport connectivity.

Land previously regarded as marginal from a planning perspective may now warrant fresh appraisal where it lies within walking distance of a qualifying transport hub.

Continuing Green Belt Reform

The August 2026 reforms build on the Green Belt changes already introduced in late 2024.

The revised framework strengthens support for compliant Green Belt development through Policy GB8, under which compliance with the Green Belt “Golden Rules” attracts substantial weight in the decision-making process. In addition, Annex E introduces a formal Green Belt assessment framework.

Importantly, the new station-led development policies can apply in certain Green Belt locations. This reflects an increasingly nuanced approach to Green Belt policy, moving away from blanket assumptions against development and towards a more targeted assessment of sustainable and well-connected sites.

For landowners holding Green Belt land around railway stations and established settlements, the revised framework may create opportunities that would have appeared unrealistic only a few years ago.

A Greater Focus on Density and Urban Intensification

Alongside support for station-led growth, the Government is placing much greater emphasis on making efficient use of land.

The revised framework encourages higher density development in sustainable locations and seeks to facilitate intensification within existing settlements.  Applicants proposing lower density schemes may increasingly face scrutiny as to whether land is being used efficiently.

For developers, the commercial implications are obvious. Sites that were previously considered fully optimised may need to be reassessed against the new policy environment. Equally, planning authorities may feel under increasing pressure to support more intensive forms of development in appropriate locations.

Significant Changes to Housing Policy

The revised NPPF also introduces several targeted housing reforms.

The definition of affordable housing has been expanded to include “Military Affordable Housing”, and a new Policy HO8 has been introduced.  In addition, Policy L2 establishes national controls relating to development within residential curtilages.

Although these changes may appear technical, they form part of a wider effort to create a more standardised national approach and reduce policy divergence between local authorities.

Infrastructure, Energy and Economic Growth Move to Centre Stage

Perhaps the most striking feature of the new NPPF is its broader economic focus.

The revised framework places significantly greater emphasis on strategic infrastructure, energy projects, digital infrastructure, data centres and wider economic growth. The Government has made clear that planning policy should actively facilitate projects that support national productivity and competitiveness.  This provides a strong indication of the Government’s priorities over the coming decade.

New Policies on Clean Energy and Utilities Infrastructure

The August 2026 revision introduces an entirely new standalone chapter dedicated to clean energy and water infrastructure.

Chapter 10 addresses:

• electricity network infrastructure;
• heat networks;
• water supply;
• drainage;
• wastewater infrastructure; and
• associated utility networks.

This reflects growing recognition that housing and economic growth cannot be delivered without corresponding investment in infrastructure.

Biodiversity Net Gain and Environmental Reform

Environmental policy has also been refined.  Policy N1 seeks to limit the circumstances in which local planning authorities can require biodiversity net gain levels above the statutory baseline, generally expecting any higher requirements to be justified through the plan-making process.

This is likely to be welcomed by many developers who have expressed concern about the growth of locally imposed biodiversity requirements that exceed national standards.

At the same time, environmental protections have been strengthened in other areas. Policy N4 enhances protection for designated landscapes and places greater emphasis on Local Nature Recovery Strategies, green infrastructure standards and sensitive water environments, including chalk streams.

Retrofit and Building Performance Gain Additional Support

One particularly welcome change for owners and investors with existing property portfolios is the increased support for energy efficiency improvements.

Under Policy CC2, substantial weight should be given to proposals that improve the energy efficiency of existing buildings or utilise district heat networks, renewable energy or low-carbon energy sources.

As occupier demand and regulatory requirements continue to evolve, this policy is likely to support refurbishment-led development strategies and investment in existing commercial building stock.

Stronger Protection for Community Assets

The revised NPPF also updates policies relating to community facilities.

Under Policy HC6, proposals involving the loss of facilities such as public houses and local shops will generally be expected to demonstrate genuine non-viability through evidence including at least 12 months of active marketing.

For landowners considering redevelopment opportunities involving community assets, these requirements are likely to increase evidential burdens and should be addressed at an early stage.

What Does This Mean for the Thames Valley?

Taken as a whole, the August 2026 NPPF represents a decisive shift towards a more development-focused planning system.

For the Thames Valley market, several themes stand out:

• enhanced opportunities for land near railway stations and major transport hubs;
• greater support for higher-density urban development;
• a more permissive approach to certain forms of Green Belt development;
• stronger policy support for infrastructure, technology and economic growth projects;
• increased encouragement of retrofit and energy-efficiency improvements; and
• greater national consistency in planning decision-making.

While local plans will continue to play an important role, the direction of travel is unmistakable. The revised NPPF is designed to accelerate development, reduce uncertainty and align the planning system more closely with national housing, infrastructure and growth objectives.

For landowners, developers and investors across the Thames Valley, now is an opportune time to revisit strategic land holdings, review development assumptions and assess whether sites that have previously been considered challenging may benefit from the new policy landscape.

Please note: This article provides a general overview of the August 2026 National Planning Policy Framework reforms and is not legal advice. The planning implications of the revised NPPF will depend on the relevant development plan, applicable planning policies, site-specific circumstances and other material considerations.

For further information, please contact Richard Higgs or Vicky McDonald in our Real Estate Team.