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The Supreme Court has ruled in favour of a developer in a significant planning law case concerning the discharge of conditions attached to a grant of outline planning permission.
The ruling provides important clarification on how planning authorities and inspectors should interpret conditions under the Conservation of Habitats and Species Regulations 2017 and the National Planning Policy Framework (NPPF).
Background
The developer had received outline planning permission in 2015 for a mixed-use development comprising 650 homes and a primary school. The development site was located near a Ramsar site, an area designated for international environmental protection, though not formally protected under the Habitats Regulations.
At the time, Paragraph 181 of the NPPF stated that Ramsar sites should be afforded the same level of protection as European protected sites under the 2017 Regulations.
The Dispute
The council had granted reserved matters approval for phase three of the development in June 2020, subject to ten conditions.
In 2021, the developer applied to discharge six of those conditions, but the council refused, citing Paragraph 181 of the NPPF and claiming that an appropriate assessment under the Habitats Regulations was required before granting approval.
A government planning inspector later upheld the council’s decision. The developer challenged the ruling in the High Court, which rejected its appeal.
The Court of Appeal also dismissed the challenge, holding that:
- Regulation 63 of the 2017 Regulations applied to discharging conditions on reserved matters; and
- Paragraph 181 of the NPPF was relevant due to its environmental protection objectives.
Supreme Court Judgment
The developer appealed to the Supreme Court, which agreed in part with the Court of Appeal’s interpretation of Regulation 63, confirming that it applies to the discharge of planning conditions.
However, the Supreme Court found that the Court of Appeal had erred in law by giving Paragraph 181 of the NPPF the same legal status as Regulation 63.
The Court emphasised that policy cannot override or replace statutory provisions, and that the local planning authority’s discretion when approving reserved matters is limited to issues that were expressly reserved at the outline permission stage.
Crucially, the Supreme Court held that the council had unlawfully used Paragraph 181 and new scientific advice from Natural England to revisit matters already resolved in the outline planning permission, effectively reopening issues that were no longer within its jurisdiction.
The appeal was therefore allowed.
Key Legal Takeaways
- Local planning authorities cannot use planning policy to override established statutory permissions.
- Paragraph 181 of the NPPF (as it stood) did not have the same legal effect as Regulation 63 of the Conservation of Habitats and Species Regulations 2017.
- Once outline planning permission is granted, authorities cannot revisit points of principle unless expressly reserved.
- The case reinforces the importance of carefully drafting planning conditions and ensuring they are applied within the lawful scope of the permission granted.
Frequently Asked Questions
Q1: What is a Ramsar site?
A Ramsar site is a wetland of international importance, designated under the Ramsar Convention. While not protected by UK legislation, planning policy historically required that they receive equivalent consideration to European protected sites.
Q2: What does it mean to “discharge” planning conditions?
When planning permission is granted subject to conditions, developers must apply to the local authority to confirm that they have met those conditions before commencing certain parts of the development.
Q3: What is an “appropriate assessment” under the Habitats Regulations?
An appropriate assessment is a process required where a plan or project may affect a protected site, ensuring that it will not have a significant adverse effect on the site’s integrity.
Q4: Why was this case significant for developers?
The ruling confirms that planning authorities cannot impose additional environmental obligations or revisit earlier approvals by relying on policy guidance instead of statutory authority.
Q5: How does this affect future planning applications?
Developers and councils must carefully distinguish between binding legal requirements (such as the Habitats Regulations) and planning policy guidance (like the NPPF). The two should not be treated as having the same force.