What 355 appeal decisions reveal about the future of Green Belt development
79% of major residential grey belt appeals have been allowed
Grey belt has quickly become one of the most significant changes to the planning system. But almost two years on from its introduction, what can developers, landowners, investors, policy-makers and decision-makers learn from the increasing number of planning decisions?
Our latest grey belt research analyses the 355 appeal decisions from the first 20 months of policy implementation, providing valuable insight into how grey belt is being interpreted in practice, and what it could mean for future development opportunities.
Building on our landmark first report, this latest edition explores how grey belt policy has evolved, how the market is responding and what the latest planning decisions mean for landowners, developers and investors.
Why this report matters
With around 600 Green Belt applications currently awaiting determination, growing numbers of appeal decisions and further changes introduced through the NPPF 2026, the grey belt landscape is evolving rapidly and has established itself already a key policy route to achieve planning permission.
Understanding how these decisions are being made, how policy is being interpreted and the factors influencing outcomes can help developers, landowners and investors make more informed decisions about future opportunities in the Green Belt.
This report brings together the latest evidence, analysis and practical insight to help readers understand what is happening, what it means and what to watch next.
Who should read this report?
This report will be particularly valuable for:
- Housebuilders and developers
- Strategic land promoters
- Landowners with Green Belt holdings
- Investors and land funds
- Planning consultants and advisers
- Local authority planning teams
- Property and development professionals
- Policy-makers and decision-takers
What’s inside the report?
- Analysis of 355 grey belt appeal decisions
- The latest appeal trends and approval rates
- Lessons from successful and unsuccessful appeals
- How the revised NPPF 2026 could influence future development opportunities
- Key court decisions and what they mean in practice
- Practical guidance on grey belt assessments, sustainability and the Golden Rules
- Insight into the growing pipeline of grey belt applications and what could happen next
Industry-recognised insight
The first edition of our grey belt report was referenced by the UK Government in the 2025 Budget as evidence of the policy’s early impact.
This latest report builds on that work, incorporating a further 12 months of appeal decisions, policy developments and emerging case law to provide an up-to-date picture of how grey belt is shaping planning outcomes across England.
Download your free copy
Green Light for Grey Belt: Golden Opportunity, New Rules and Still a Game Changer
Discover what 20 months of grey belt decisions reveal about the opportunities, challenges and emerging trends shaping development in the Green Belt.
Complete the form below to access your free copy.
