Coulsdon Common has a varied mix of habitats for you to discover. These include ancient woodland, enhanced in spring with the colour of bluebells. In summer the chalk grassland flourishes with many flowers which provide a food source for butterflies and other insects. Glades on the acidic soil support remnants of heathland where heather and gorse survive from days gone by. Take a walk through the woodland and you will find a pond where dragonflies shimmer in summer sunshine.
The Windmill enclosure marks the spot where a postmill stood and operated from 1777. In 1898 the postmill stopped working and it was demolished in 1924. The old postmill provides a clue that the wooded area was once open grassland and heathland because it would be inefficient to site a windmill in the middle of a wood. A smaller postmill stood for a similar time nearby, on the site of Windmill House. As part of the management of the grassland, cattle and sheep graze the common. In spring, look out for new born lambs in the paddocks near the Estate Office. Throughout the year there are guided walks of the area.