Special Protection Areas.
Sites classified for rare and migratory birds, protected on the same footing as Special Areas of Conservation. The test is the same: no adverse effect on integrity, assessed before permission.
- Development outside the catchment
- Schemes paying into a strategic mitigation fund
- Proposals providing alternative natural greenspace
- Net new dwellings within the catchment
- Schemes near estuary or coastal margins
- Anything increasing public access to the site
Classified under the Habitats Regulations for the birds they support, SPAs attract the same protection as SACs: an appropriate assessment where a likely significant effect cannot be ruled out, and refusal unless integrity is safeguarded.
For housing, the dominant issue is recreational disturbance — more homes within a catchment means more visits, more dogs, more pressure on nesting and overwintering birds. Many authorities in affected catchments require a per-dwelling contribution to mitigation.
Where a mitigation tariff exists, treat it as a fixed cost per dwelling at appraisal — it is rarely negotiable and it is the route to a grant rather than an argument.
How schemes actually fare inside this designation — approval rates, appeal survival, which authorities apply it hardest — needs the designation joined to the decision record. That join isn’t built, so those figures aren’t published here. We won’t estimate them.
Check whether a site sits in a mitigation catchment — the contribution is a per-dwelling cost, not a design question.