Bricket Wood Common is a 70 hectare open space and biological Site of Special Scientific Interest in Bricket Wood in Hertfordshire.

[3] The common is a remnant of a lowland heath, with much it on the heavy soils of boulder clay with poor drainage and wet habitats.

The woodland canopy is mainly oak and silver birch with a shrub layer of hornbeam and hazel.

Lowland heath flora include sphagnum in the wetter areas and there are several small ponds.

[1] The common is divided by the Abbey Line railway.