Mature trees at Avery Hill, many dating back to the planting of Victorian magnate Colonel North, have given protected status.
The 19 trees have been added to the list of trees protected at Avery Hill after an application to the council from the Winter Garden campaign group.
They include pines, oak, beech and limes which help to give the area its unique character, having been built by Col North in the 1890s and converted for education in the early 20th century.
The Avery Hill campaign group is also seeking conservation status for the Mansion site and adjacent parkland in advance of consideration of plans to create a 1,100 student boys’ secondary school on the site. The government and Harris are expected to give more details of their plans later in the spring with a projected opening in September 2022.
Trees which are already subject to protection are six within the Winter Garden itself and 14 others across the site.
Although developers can remove trees given Tree Preservation Orders, they need specific permission and may be subjected to conditions.