In conservation areas, notice is required for works to trees that have a trunk diameter of more than 75mm when measured at 1.5m from ground level (or more than 100mm if reducing the number of trees to benefit the growth of other trees).

You have to give your local planning authority six weeks’ notice before carrying out work on trees which are located in a conservation area but are not yet the subject of a tree preservation order. This gives the authority an opportunity to consider whether an order should be made to protect the trees.

Find out more about the Notification of proposed works to trees in conservation areas¹ [PDF]

View Government guidance on Tree Preservation Orders and trees in conservation areas².

1. https://ecab.planningportal.co.uk/uploads/1app/guidance/guidance_note-works_to_trees.pdf
2. https://www.gov.uk/guidance/tree-preservation-orders-and-trees-in-conservation-areas