How big should a hedgehog hole in a fence be?
13cm by 13cm. Hedgehog Street says a square that size “is sufficient for any hedgehog to pass through”, and that it will be too small for nearly all pets. A gap like this between gardens is what is meant by a hedgehog highway.
Why it matters
Hedgehog Street says hedgehogs travel around one mile every night through parks and gardens looking for food and a mate, and that walled and fenced gardens block those routes. It also says a hedgehog will not use your hedgehog house, however good it is, unless it can get into the garden.
How to make one
Hedgehog Street lists three ways:
- Remove a brick from the bottom of a wall.
- Cut a small hole in your fence if there are no gaps.
- Dig a channel under your wall, fence or gate.
It reminds you to use tools carefully. A fence or wall you share is also your neighbour’s, so talk to them first.
After you have made it
- Hedgehog Street sells labels that can be pinned above the hole so nobody blocks it by accident.
- It asks you to add the hole to the BIG Hedgehog Map.
Sources
- Hedgehog Street: Link your garden, opened 14 November 2026.
- Hedgehog Street: Hedgehog homes, opened 14 November 2026.