Planning Atlas
ConstraintsLocal Nature Reserves
Planning AtlasConstraintsLocal Nature Reserves
Statutory · National Parks and Access to the Countryside Act 1949, s.21

Local Nature Reserves.

Sites declared by a local authority for their local wildlife or geological value, and for people to enjoy nature close to home. Protection is national-policy based rather than absolute.

Harm must be justified and outweighed; loss of the reserve itself is hard to defend.
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At a glance · this designation across the recordAll constraints →
161
In London
inside the GLA boundary
Moderate
Constraint weight
Physical pillar
What is and isn’t allowed
Generally workable
  • Development adjacent with a buffer
  • Access and interpretation improvements
  • Schemes delivering biodiversity net gain on site
Needs careful handling
  • Anything reducing the reserve’s area
  • Lighting spilling into the reserve
  • Increased public pressure without management
The statutory test

Declared by the authority in whose area they lie, usually on land it controls. National policy directs that development resulting in loss or deterioration of an irreplaceable habitat should be refused, and that harm to a site of local importance should be weighed against the benefits of the scheme.

Key facts
Declared underNPACA 1949, s.21
Declared byThe local authority
ProtectionPolicy-based, not absolute
The policies that bite
NPPF Chapter 15
Conserving and enhancing the natural environment
Environment Act 2021
Biodiversity net gain
Before you submit

The practical question is edge effects — lighting, drainage, overlooking and cat pressure from new housing do more damage than the footprint. Design the boundary treatment early; it is what the ecologist and the case officer will focus on.

What isn’t here yet

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 adjoins a reserve — the design issues are at the boundary, not the footprint.

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