What nutrient neutrality is
Some protected wetland and river habitats suffer from excess nitrogen and phosphorus, which cause algal blooms and harm wildlife. Under the Habitats Regulations, a council cannot approve development that would make that worse unless it can be shown there will be no adverse effect.
Natural England advises that in affected catchments, new homes and other overnight accommodation must be nutrient neutral. The extra nutrients from wastewater, and from changes in land use, must be offset.
The impact
When the advice was extended in March 2022, many applications stalled while councils and developers worked out how to calculate and mitigate nutrient loads. Thousands of homes were delayed.
Mitigation options
- Buying nutrient credits from council, Natural England or private schemes.
- Creating wetlands or taking agricultural land out of intensive use.
- On-site measures such as package treatment plants, where appropriate.
The way forward
The Planning and Infrastructure Act 2025 introduced Environmental Delivery Plans. Under them, developers pay a levy and Natural England delivers mitigation at catchment scale. The first EDPs focus on nutrient pollution, starting with a draft plan for Norfolk in 2026. If your site is in an affected catchment, factor nutrient mitigation into the land price and programme.
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Sources
- Defra: Laying the groundwork for the Nature Restoration Fund
- GOV.UK: Draft Norfolk Environmental Delivery Plan consultation (nutrient pollution)
This article is general information about planning in England at the date shown. It is not advice on any particular site, and the law and policy may have changed since. Please speak to us before relying on it.