The council duty to protect trees when granting permission
Section 197 is a duty, not a power. Councils must consider conditions for tree preservation and planting whenever it is appropriate, and make orders where the permission makes them necessary.
Section 197 of the Town and Country Planning Act 1990 places a duty on local planning authorities, not a discretion. When granting planning permission, the authority must ensure, whenever it is appropriate, that adequate provision is made by conditions for the preservation or planting of trees, and must make such tree preservation orders as appear necessary in connection with the grant. Both limbs are frequently overlooked, and the second one almost always is.
The section 197 duty trees question comes up in two situations: when you want a permission to carry proper tree protection, and when you are considering whether a grant that ignored the trees on a site is vulnerable. The answers are different, and neither is as strong as clients tend to hope.
Where the duty comes from and what it says
The duty sits in Part VIII of the 1990 Act, alongside the power in section 198 to make a tree preservation order where it appears expedient in the interests of amenity, and the duty in section 206 to replace trees removed in breach of an order.
Two features of the drafting control everything that follows. The words "whenever it is appropriate" leave the authority a judgement about when the duty is engaged at all. And the duty is framed around conditions and orders, so it is a duty about mechanisms rather than a duty to secure any particular outcome. Nothing in section 197 requires an authority to refuse permission to save a tree.
What it does mean is that an authority granting permission on a wooded site without considering tree conditions has failed to do something the Act requires. That is a real ground of complaint, even if it is a hard one to win on.
How officers discharge it in practice
In most authorities the duty is discharged through the tree officer's consultation response and the standard condition set. The chain runs: arboricultural information submitted with the application, tree officer comments, conditions imposed, then discharge of those conditions before works start.
The documents that carry the weight are a survey to BS 5837:2012 identifying each tree with its category and root protection area, an arboricultural impact assessment setting out what the scheme does to them, a tree protection plan showing fencing and ground protection, and an arboricultural method statement covering the works within root protection areas. A tree survey that stops at the first of those leaves the officer without the material to write a workable condition.
Where the survey is thin, a competent officer will condition the missing work rather than refuse. That is worth knowing because it shifts cost and risk from the application stage to the discharge stage, usually at a worse moment in the programme.
Conditions imposed to satisfy the duty
The usual set runs in a predictable order:
- Development to be carried out in accordance with the approved tree protection plan and method statement.
- Protective fencing to be erected before any equipment or materials are brought onto site, and retained until completion.
- No excavation, storage, mixing, level change or service run within root protection areas except as approved.
- Special engineering, such as no-dig construction, three-dimensional cellular confinement or pile and beam foundations, where surfacing or structures fall within a root protection area.
- Replacement planting, with species, size, numbers, positions and a period during which failures must be replaced.
- Arboricultural supervision at identified stages, with records submitted to the authority.
The wording of the trigger matters as much as the substance. A protection condition that bites only when development starts can be breached by a site set-up that arrives the week before, which is why the better wording refers to any equipment, materials or machinery being brought onto the site. Where the planting is doing long-term work, the security usually has to sit in an agreement rather than a condition, as our note on long term tree management secured by planning agreement explains.
Conditions about future crown works are a common source of dispute, and specifying them properly at the outset avoids arguments later. Our guidance on specifying crown works councils will accept covers the language that works.
Making an order alongside a permission
This is the limb that gets forgotten. Section 197(b) obliges the authority to make such orders as appear necessary in connection with the grant of permission, whether to give effect to conditions or otherwise.
The practical situation is a site with valuable unprotected trees where permission is granted with a retention condition. The condition binds the current development. It does not prevent the trees being felled once the development is complete and the condition has been discharged, and it does not bind a subsequent owner in the same way an order does. An authority that wants those trees to survive the decade after completion needs an order.
Agents acting for applicants should anticipate this rather than resist it reflexively. A retained tree that is the basis of a landscape argument at committee is a tree the authority is entitled to protect, and an order made after permission is far less disruptive than one made mid-construction. The penalties for damaging a protected tree are severe enough that knowing the status of every retained tree on site is basic risk management.
Challenging a decision that ignored the duty
The route is judicial review, on the ground that the authority failed to discharge a statutory duty, with the usual short time limit for planning challenges. Be realistic about the prospects.
The duty is qualified by "whenever it is appropriate", which imports a judgement the courts will be slow to second-guess. If the officer report shows that trees were considered and a view was taken that conditions were not needed, the duty has been engaged and answered, even if the answer was wrong on the merits. The stronger case is the one where the trees appear nowhere: no consultation with the tree officer, no mention in the report, no conditions, on a site where the constraint was obvious from the submitted plans.
For objectors, the practical point comes earlier. Raising the trees in a representation, with photographs and an account of their amenity value in public views, puts the authority in a position where the officer report has to deal with them. Silence at consultation stage makes the later challenge much harder.
Illustrative example. A permission for four houses on a garden plot with three mature unprotected limes, granted with a landscaping condition but no tree protection and no order, is the archetype. The trees are not protected during construction, nothing prevents their removal afterwards, and the permission itself is difficult to disturb. The example is illustrative, but the pattern recurs.
Trees outside the site but affected by it
Root protection areas do not stop at red lines. A neighbouring tree, protected or not, can have a third of its root system under the application site, and the duty extends to conditions that protect trees affected by the development rather than only trees within it.
The limit is control. A condition cannot require works on land the applicant does not own, so protection has to be achieved through what happens inside the site: fencing set at the calculated root protection area, no-dig surfacing, foundation design, and a method statement for any excavation within the zone. Where the tree is shared or its ownership is unclear, settle that before the application rather than after a contractor has cut roots.
What the duty does not require
It does not require an authority to refuse permission to save a tree. It does not require an order to be made in every case. It does not apply to hedges as such, which are dealt with under separate regimes. And it does not convert the authority into a guarantor: if a protected tree is damaged despite conditions, the remedy runs against whoever did it, not against the council.
The realistic use of section 197 is as a lever at application stage, not as a weapon afterwards. Put the tree evidence in early, ask for the conditions you want in the words you want, and where you are advising a developer, get the Landscape Strategy and the arboricultural documents saying the same thing.
PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. Arboricultural surveys and method statements should be prepared by a suitably qualified arboriculturist, and this is general guidance rather than legal advice: check the position with your local planning authority or a qualified professional before relying on it.
Frequently asked questions
Is section 197 a duty or a power?
A duty. Section 197 of the Town and Country Planning Act 1990 requires local planning authorities, when granting permission, to ensure that adequate provision is made by conditions for the preservation or planting of trees whenever it is appropriate, and to make such tree preservation orders as appear necessary in connection with the grant. The qualifying words leave the authority a judgement about when it is engaged.
Can a council make a tree preservation order after granting permission?
Yes, and section 197 expressly contemplates it, since the duty covers orders made in connection with the grant. Making an order after permission is common where retained trees need protection that outlasts the construction conditions. It does not undo the permission, but it does control works to the trees themselves from the date the order takes effect.
Does a retention condition protect a tree permanently?
No. A condition binds the development it attaches to and is discharged once complied with. It does not prevent felling after completion in the way a tree preservation order does, and it does not give the same control over a later owner. Where long-term protection is the aim, an order or a planning obligation is the appropriate mechanism.
Can conditions protect a neighbour's tree?
Indirectly. A condition cannot require works on land outside the applicant's control, but it can control what happens inside the site: fencing at the calculated root protection area, no-dig surfacing, foundation design and a method statement for excavation within the zone. Most damage to neighbouring trees happens through site works, so that is usually enough.
What are the prospects of challenging a permission that ignored trees?
Modest unless the trees were ignored entirely. The duty is qualified by whether it is appropriate, so a decision showing that trees were considered and conditions were judged unnecessary is hard to disturb. A case with no tree officer consultation, no mention in the officer report and an obvious constraint on the submitted plans is the stronger one.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.