27/10/2015 Last Modified: 08/11/2018
If the building work proposed requires planning consent, all trees which could potentially be affected by the development (including those off-site) should be assessed by an arboricultural consultant in accordance with British Standard BS5837 Trees in Relation to Construction – Recommendations, and details of this submitted to the Local Planning Authority with the planning application.
This assessment will consider tree condition, dimensions, likely retention span (years), and future growth potential, and will inform design in relation to how close you can build to trees. If the tree is to be retained, constraints to be considered are those below ground and above ground.
The below-ground constraints are dictated by the root protection area (RPA) the calculation of which is based on the stem diameter; the above ground constraints are dictated by the height and spread of the tree, future growth potential, shading potential and what you are proposing to construct.