What every developer needs to know before breaking ground

For many developers, trees are often viewed as another planning constraint to be managed alongside highways, drainage, ecology and utilities. In reality, they are something much more significant. Trees occupy a unique position within the planning system because they are increasingly seen as environmental assets, legal considerations and critical pieces of infrastructure that can influence whether a development secures planning permission, how it is designed and ultimately whether construction proceeds without delay, writes Pete Thomas at Ruskins, the tree and soil specialists.

 

Too often, trees only receive serious attention once planning has begun or, worse still, when machinery arrives on site. By that stage, decisions have already been made, layouts are fixed and costly compromises become unavoidable. The most successful developments are those where trees are understood from the outset, allowing designers to work with the landscape rather than against it.

As the Government continues to emphasise environmental quality within the planning system, understanding tree legislation has become an essential part of risk management for every developer.

One of the first questions developers should ask when assessing a site is whether any trees are protected by a Tree Preservation Order (TPO). A TPO is a legal order made by a local planning authority to protect trees that provide significant public amenity. Once a tree is protected, it becomes a criminal offence to cut down, uproot, top, lop or wilfully damage or destroy it without the appropriate consent, unless a specific exemption applies. 

Importantly, protection extends far beyond simply felling a tree. Construction activities that damage roots, compact soil, alter ground levels or sever underground root systems can all have serious consequences if they lead to the decline or death of a protected tree.

In spite of this, developers sometimes assume that obtaining planning permission automatically removes the need to consider protected trees. While certain works may become exempt where they are necessary to implement a detailed planning permission, this is not automatic and depends on the specific permission and approved drawings. Tree protection should therefore be considered throughout the planning process rather than viewed as an obstacle to overcome once permission has been granted. 

Why BS5837 Surveys Are So Important

Perhaps the most influential document affecting trees on development sites is BS5837:2012 – Trees in Relation to Design, Demolition and Construction. Although not legislation itself, BS5837 has become the recognised British Standard used by planning authorities across the UK when assessing development proposals involving existing trees.

Where development has the potential to affect trees, local planning authorities will frequently require a BS5837 tree survey as part of a planning application. The survey identifies every significant tree on or adjacent to the site, assesses its condition, expected lifespan and quality, and calculates Root Protection Areas (RPAs) that should normally remain undisturbed throughout construction.

More importantly, the survey helps shape the development itself. Rather than simply recording trees, it informs decisions about building locations, access roads, service routes, drainage, retaining structures and site compounds before designs become fixed.

When undertaken early, a BS5837 survey allows developers to optimise layouts while retaining valuable trees. When commissioned late, it often results in redesign costs, planning delays or the loss of development value.

Tree protection is also embedded within the National Planning Policy Framework (NPPF), which requires planning decisions to contribute to and enhance the natural environment.

The Framework encourages planning authorities to recognise the multiple benefits that trees deliver, including biodiversity, climate resilience, carbon storage, flood mitigation, air quality improvement, urban cooling and wider public wellbeing. Rather than treating trees as isolated landscape features, the NPPF increasingly views them as critical green infrastructure that contributes to sustainable development. 

This means developers are expected to demonstrate not only how existing trees have been protected, but increasingly how developments can enhance overall tree cover through high-quality landscape design and long-term management.

The result is a gradual move away from viewing tree retention as a planning constraint and towards recognising trees as an asset capable of increasing the quality, attractiveness and value of completed developments.

The Consequences of Damaging Protected Trees
One of the greatest misconceptions within construction is that tree damage only occurs when a tree is cut down. In reality, many of the most serious problems arise underground.
Heavy plant operating within root protection areas can compact soil, reducing oxygen and water availability to roots. Excavations for foundations or services may sever structural roots that are essential to the tree's long-term stability. Changes in ground level or drainage patterns can also place large trees under significant physiological stress. The effects may not become visible for several years, by which time construction has been completed and responsibility can become considerably more complicated.
Where protected trees are damaged unlawfully, local planning authorities have significant enforcement powers. Deliberately destroying or carrying out unauthorised work to protected trees can lead to substantial financial penalties, prosecution and requirements to replace trees, while serious offences may result in unlimited fines depending on the circumstances. 

As well as the legal implications, the commercial consequences can be equally damaging. Enforcement action, project delays, redesign costs and reputational harm can far outweigh the relatively modest investment required for proper arboricultural advice at the beginning of a project.
What Will Planning Reform Mean for Trees?

Planning reform continues to evolve as Government seeks to accelerate housing delivery while maintaining environmental standards. However, although proposals to streamline planning decisions have received considerable attention, there has been no indication that tree protection itself will disappear. Instead, the direction of travel suggests environmental information will become increasingly integrated with wider planning and biodiversity objectives.

Alongside Biodiversity Net Gain, stronger expectations around climate resilience and sustainable placemaking mean trees are likely to become even more influential in determining how developments are designed rather than whether they proceed at all.

For developers, this means early arboricultural input is becoming more valuable, not less. Sites that successfully integrate existing trees into well-considered layouts are increasingly better placed to satisfy planning policy while creating developments that are more attractive to purchasers, residents and local communities.
All this means that the best development teams no longer see trees as something to negotiate around after purchasing land. They understand that existing trees influence site value, planning strategy, engineering solutions and long-term placemaking from the very beginning.

Early surveys reduce uncertainty. Good design minimises conflict. Careful site management protects valuable assets throughout construction. Ultimately, successful development is rarely about removing every constraint. It is about understanding those constraints early enough to turn them into opportunities.

Trees have become one of the defining features of sustainable development and developers who understand both the legal framework and the practical realities of tree protection are increasingly the ones delivering schemes that secure planning permission more efficiently, minimise construction risk and create places that people genuinely want to live and work in.