Trees often play an important role in planning applications across London. When development work is proposed near existing trees, local authorities usually require a professional assessment before planning permission is granted.
This assessment is known as a BS5837 tree survey. The survey follows the British Standard BS5837: Trees in Relation to Design, Demolition and Construction.
The purpose of the survey is to identify existing trees on or near a development site and determine how they may be affected by construction work. The findings help ensure that important trees are protected while allowing development projects to proceed responsibly.
What Is a BS5837 Tree Survey?
A BS5837 tree survey is a detailed inspection carried out by a qualified arboricultural consultant before development or construction work begins.
The survey records information about trees located within or near a proposed development site.
This normally includes:
- Tree species
- Height and canopy spread
- Stem diameter
- Age classification
- Health and structural condition
Each tree is also assessed to determine its value and whether it should be retained or removed as part of the development process.
The information collected during the survey forms the basis of a professional arboricultural report submitted with a planning application.
Why Local Authorities Require BS5837 Surveys
Local planning authorities require BS5837 surveys to protect trees during construction and ensure that development work is carried out responsibly.
Trees provide environmental, visual and ecological benefits, especially in urban areas like London.
Planning authorities use tree surveys to evaluate how a development may affect existing trees and what protection measures may be required.
Planning Applications
Many planning applications require a tree survey if trees are located within or close to the development site.
The survey helps planning officers understand the condition and importance of the trees.
It also helps them determine whether trees should be retained and protected during construction.
Construction Projects
Construction work can easily damage tree roots, trunks or canopies if protective measures are not in place.
Heavy machinery, excavation and changes to ground levels may all affect tree stability and health.
A BS5837 survey helps ensure that construction plans consider the presence of trees before work begins.
Protecting Existing Trees During Development
Trees that are considered valuable may be protected during the construction process.
The survey helps identify which trees should be retained and how they should be protected.
Protection measures may include barriers, restricted work zones or adjustments to construction layouts.
What a BS5837 Tree Survey Includes
A BS5837 survey in London provides detailed information about each tree and its relationship to the proposed development.
The survey findings are normally presented in a written report along with supporting plans and drawings.
Tree Categorisation and Condition
Trees are categorised based on their quality and potential lifespan.
This helps determine whether a tree should be retained as part of the development or whether removal may be appropriate.
High quality trees may be prioritised for protection during construction.
Root Protection Areas
One of the most important elements of a BS5837 survey is the identification of Root Protection Areas (RPAs).
The RPA represents the minimum area around a tree that should remain undisturbed to protect the root system.
Construction work within this area can damage roots and affect the long term health of the tree.
Tree Constraints Plans
The results of the survey are often presented on a tree constraints plan.
This plan shows the location of trees and their root protection areas in relation to the proposed development.
Architects and planners use this information to design buildings and infrastructure that minimise impact on important trees.
How BS5837 Reports Help Developers and Architects
BS5837 reports provide valuable guidance during the design and planning stages of a project.
Developers and architects use these reports to understand the limitations that trees may place on a site.
This allows construction plans to be adjusted early in the design process, which can help avoid delays or planning issues later.
A well prepared tree survey can make the planning process smoother by providing clear arboricultural information to the local authority.
Working with a Professional Arboricultural Consultant
BS5837 surveys should always be carried out by qualified arboricultural consultants who understand planning regulations and tree management.
Professional arborists have the experience and technical knowledge needed to assess trees accurately and prepare reports that meet planning authority requirements.
Working with an experienced consultant helps ensure that tree surveys are carried out correctly and that development projects proceed in compliance with current standards.