Special Protection Areas (SPAs) and planning

 

A Special Protection Area (SPA) is a site protected for internationally important populations of wild birds. SPAs originated under the European Birds Directive, but following the UK’s departure from the European Union they continue to be protected in England through domestic legislation, principally the Conservation of Habitats and Species Regulations 2017, as amended.

SPAs and Special Areas of Conservation (SACs) together form the UK’s National Site Network. JNCC maintains the UK-wide site information and published its latest network update in April 2026.

For planning, the important point is that protection is not confined to development physically inside the SPA boundary. A proposal some distance away can require assessment if there is a realistic pathway by which it could affect the SPA’s qualifying bird species or conservation objectives.

 

What does an SPA protect?

 

SPAs are classified for bird species and populations of international importance, including rare and vulnerable species and regularly occurring migratory birds. The reasons for classification differ between sites, so the starting point for any planning assessment is the qualifying features and conservation objectives of the particular SPA.

A coastal SPA might be vulnerable to disturbance of feeding or roosting birds, while a heathland SPA may be sensitive to recreational pressure, fire risk, predation or loss of habitat used by breeding birds. A development several kilometres away can sometimes matter where birds rely on functionally linked land outside the designated boundary for feeding, roosting or other ecological needs.

JNCC’s SPA site information provides the UK list and Standard Data Forms. Natural England’s designated-sites database provides conservation objectives for English sites.

 

SPAs after Brexit: they have not lost their planning protection

 

Older documents often describe SPAs simply as part of the EU Natura 2000 network. That is historically correct but incomplete for current UK planning.

SPAs and SACs are now collectively maintained as the UK’s National Site Network. The 2017 Habitats Regulations, amended following EU exit, continue to provide the domestic assessment and protection regime. JNCC still uses the established Natura 2000 Standard Data Form format for site information, even though the UK no longer submits that data to the European Commission.

 

When does a planning proposal need Habitats Regulations Assessment?

 

The local planning authority is normally the competent authority for a planning application. Under the Habitats Regulations it must consider whether a plan or project which is not directly connected with or necessary to management of the SPA could have a likely significant effect on the site, either alone or in combination with other plans or projects.

This first stage is part of the Habitats Regulations Assessment (HRA) process and is generally called HRA screening. If likely significant effects cannot be excluded on objective information, the competent authority must proceed to an appropriate assessment.

At screening, mitigation measures introduced specifically to avoid or reduce harm to the SPA should not be relied upon to screen the project out. Those measures can be examined at the appropriate-assessment stage. This distinction follows the established People Over Wind principle and is reflected in current government HRA guidance.

The developer may provide ecological surveys, a shadow HRA or other technical material, but the statutory assessment and conclusion remain the responsibility of the competent authority.

 

What happens at appropriate assessment?

 

The appropriate assessment examines the implications of the proposal for the SPA in view of its conservation objectives. It should be sufficiently detailed to allow the authority to decide whether an adverse effect on the integrity of the site can be ruled out.

The competent authority must consult Natural England at this stage and take its advice into account. Mitigation can be considered, but the authority must be confident that it will be effective and capable of being secured and maintained for as long as necessary.

Permission can normally be given only where there is no reasonable scientific doubt that the proposal will not adversely affect the integrity of the SPA. If that conclusion cannot be reached, the proposal can proceed only through the much more demanding derogation route, including consideration of alternative solutions, imperative reasons of overriding public interest and compensatory measures.

 

There is no universal 400 metre or 5 kilometre SPA rule

 

This is an important correction to the former version of this page. There is no national rule that residential development is prohibited within 400 metres of every SPA, nor a general rule that everything within 5 kilometres must provide a SANG.

Those distances are well-known because the Thames Basin Heaths SPA has a strategic mitigation framework under which no net new residential development is normally permitted within 400 metres and relevant residential development in the wider zone contributes to or provides Suitable Alternative Natural Greenspace (SANG) and Strategic Access Management and Monitoring (SAMM).

Other SPAs have different zones of influence, catchments and impact pathways. Some issues are driven by recreation; others by air quality, hydrology, nutrient loading, disturbance, loss of functionally linked land or another site-specific effect. Always check the particular SPA’s conservation objectives and the local authority’s current habitats strategy.

 

Development outside the SPA can still affect it

 

Distance on its own is not the test. Current government HRA guidance expressly recognises effects from development some distance away, for example through air or water pollution, noise or the loss of feeding areas used by protected species.

For birds, functionally linked land can be especially important. Agricultural fields, estuaries, waterbodies or other land outside the SPA may support qualifying birds at particular times. Development of that land can therefore engage HRA even though the red line never crosses the SPA boundary.

Natural England’s SSSI Impact Risk Zones on MAGIC are a useful screening tool, but they do not replace site-specific ecological judgment.

 

What does the August 2026 NPPF say?

 

Policy N6 treats habitats sites as sites of international importance. Development affecting a habitats site should be refused unless an appropriate assessment has concluded that the proposal will not adversely affect site integrity, or the statutory derogation tests can be satisfied. The 2026 policy also recognises the new route where relevant impacts are being addressed through a made Environmental Delivery Plan and the developer has committed to paying the nature restoration levy.

N6 applies whether the development is inside or outside the designated site if it would affect the biodiversity value concerned.

 

Permitted development and SPAs

 

Do not assume that obtaining or relying upon a permitted development right disposes of the habitats issue. Government HRA guidance expressly recognises activities under permitted development rights as capable of being projects for Habitats Regulations purposes, and the Regulations contain provisions dealing with permissions granted by development orders.

The individual GPDO class must therefore be checked alongside the habitats legislation and any prior-approval process. The ecological consequences can be decisive even where the underlying form of development would otherwise benefit from permitted development.

 

Relevant legislation and guidance

 

• Conservation of Habitats and Species Regulations 2017, as amended
• Government guidance: Habitats regulations assessments
• JNCC: Special Protection Areas
• National Planning Policy Framework, August 2026, especially N6

 

Conservation, Heritage & Protected Sites

 

Special Protection Areas Page Updated: 20th August 2026