UK Planning Appeals Update 2026: What the New Procedural Guide Means for Developers and LPAs

The 2026 Planning Appeals Procedural Guide (published 12 February 2026) introduces important changes to how planning appeals in England will be determined by the Planning Inspectorate.

So what’s changed, and what impact will it have?

Part 1 is now the default route for most planning appeals.

Under the previous 2015 guidance, written representations, hearings and inquiries were used with greater discretion. Statements of case were common and inspectors had more procedural flexibility.

Under the new 2026 rules:

• Most appeals will proceed under Part 1 (Written Representations)
• Expedited timetable (often 8–12 weeks)
• No statements of case
• Strict submission deadlines
• Limited ability to introduce new evidence
• Third parties cannot submit new comments at appeal stage

Part 2 appeals remain for complex or contentious cases and may involve hearings or inquiries, but procedural control is tighter than before.

What does this mean for planning strategy?

For developers, land promoters and local planning authorities, the implications are significant:

• Appeals will move faster
• A streamlined, digital-first process will reduce administrative burden
• Clearer rules on deadlines and compliance
• Missed deadlines may result in evidence being excluded
• Far less opportunity to “repair” a weak application at appeal stage
• Consultation responses at application stage carry even greater weight
• Escalation to Part 2 required for genuinely complex cases

In practical terms:

The strength of your planning application will now largely determine the strength of your appeal.

If you are promoting residential, employment or mixed-use schemes in 2026, appeal risk needs to be considered at the point of submission, not after refusal.

If you’re submitting applications this year and want to stress-test appeal risk under the new rules, please get in touch with the Eden team.