Which reports when your site has a Tree Preservation Order
A Tree Preservation Order does not stop development. It sets the order in which you have to do things, starting with a survey that comes before the layout.
A Tree Preservation Order on your site means three documents in a fixed order: a BS 5837:2012 tree survey with a constraints plan, an Arboricultural Impact Assessment once a layout exists, and a tree protection plan with a method statement for anything happening near roots. The survey comes first because the root protection areas it calculates decide where buildings can go. Draw the scheme first and you will pay for the survey twice.
An order does not prevent development. It makes the local planning authority the decision maker on works to the trees it protects, and it makes damage a criminal offence, which is why contractors take it more seriously than most planning constraints.
Confirming what is protected
Start with the order itself. Ask the council for a copy, including the schedule and the map, and check what category the protection uses.
Individual trees are listed and numbered. Groups are protected as a group, which means every tree within the defined group. Areas protect all trees of the species and size present within a boundary at the date the order was made, which is a different and more awkward test because later self-seeded trees are not covered. Woodlands protect the whole woodland including natural regeneration.
An area order made forty years ago is the one that causes disputes, since establishing which trees existed at the date of the order requires historical evidence. Get this settled before you rely on it.
Separately, every tree in a conservation area with a stem diameter above the threshold in the regulations carries a notice requirement whether or not an order exists. You give the council six weeks written notice of proposed works, and the council can respond by making an order. Treat that six weeks as programme.
The survey and the constraints plan
A BS 5837:2012 survey records every tree on or adjacent to the site: reference number, species, height, stem diameter, canopy spread, age class, condition, estimated remaining contribution, and a retention category. Categories run from A, trees of high quality worth retaining, down to U, trees that should be removed for sound arboricultural reasons regardless of development.
From the stem diameter comes the root protection area, calculated as a circle with a radius of twelve times the diameter and capped at 707 square metres. Those areas, drawn on the tree constraints plan alongside shade patterns, are the design input.
Neighbouring trees belong on the plan too. An order protecting a tree in an adjoining garden constrains your site through its root protection area and its canopy, and you have no control over either.
Issue the constraints plan to the design team as a base drawing. That single step prevents most of the trouble that follows.
The impact assessment and what it must quantify
Once a layout exists, the Arboricultural Impact Assessment sets out what the scheme does to the trees.
It should give, tree by tree: whether the tree is retained or removed, the area of any incursion into the root protection area expressed as a percentage, the reason for the incursion, and the mitigation. It should also cover indirect effects, which are the ones most often missed. Shading of new windows leading to future pressure for pruning. Level changes altering drainage across a rooting zone. Service trenches. Scaffold positions. Site access routes.
Where incursion stays below a fifth of the protection area and the tree is in good vigour, the standard treats it as potentially acceptable with compensatory measures. Above that, the case needs evidence from trial excavation rather than assertion.
Be direct about losses. An assessment that reports the removal of two category B trees with a replacement scheme reads better than one that describes them as low quality when the tree officer can see they are not.
Designing around root protection areas
The technical answers are well established and worth knowing before the layout is fixed.
No-dig construction places a cellular confinement system and a geotextile over the existing grade, with the surface built up rather than excavated, allowing driveways and parking to sit within a protection area. Cantilevered or pile and beam foundations carry a building over roots without a continuous trench. Services can be routed outside protection areas altogether, or installed by trenchless methods where they cannot, and shared ducts reduce the number of crossings.
Levels are the constraint people forget. Raising ground over a rooting zone suffocates roots as effectively as cutting them, so a scheme that regrades a garden to create a level terrace under a protected oak has a problem regardless of how careful the excavation is.
Set the building back far enough that future pressure to prune is not built in. A house with living room windows two metres from a mature canopy generates an application to reduce the tree within five years.
Foundations near trees raise a second question that has nothing to do with the order. On shrinkable clay soils, the depth of foundation required near an existing tree is set by structural and building control considerations rather than arboricultural ones, and those depths can require excavation the protection area will not allow. Resolving the conflict between the two is a conversation between the arboriculturist and the structural engineer, and it is one to have before planning rather than after.
Where the other documents fit
The Landscape Strategy carries the replacement planting, the species and sizes, and the arrangements for establishment and maintenance. Where trees are removed, this is the document that answers the loss.
Ecology overlaps more than people expect. Mature trees support bats, and a tree with cavities, loose bark or dense ivy needs assessment before any felling or major surgery. Removal of trees and scrub also changes the baseline for biodiversity net gain, so time the ecological work alongside the arboricultural work rather than after it.
Where the scheme requires a Design and Access Statement, the trees should appear in the design evolution narrative rather than in an appendix, since showing that the layout responded to the constraints plan is the strongest single argument available.
An illustrative sequence
This example is illustrative. A plot with two category A oaks along the rear boundary, both covered by an individual order, and a proposal for a single detached house.
The sequence runs: topographical survey with tree positions, BS 5837 survey and constraints plan, layout tested against the protection areas, an early conversation with the council's tree officer, then the impact assessment, tree protection plan and method statement for the driveway crossing one protection area in no-dig construction. Replacement planting is not needed because no trees are lost, but the landscape plan shows the ground treatment within the protection areas and the drainage arranged to avoid altering the rooting environment.
Total arboricultural cost on a plot like that is a fraction of the cost of redesigning after a refusal. And the tree officer's early comment is free.
You can check the other reports a constrained site triggers alongside the tree work, and Enter your postcode on PlanScope to see whether tree constraints are flagged on your site.
Arboricultural work is specialist and councils usually expect a suitably qualified author, so treat an AI-assisted draft as the structure and policy framing rather than as the survey. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
What does a Tree Preservation Order actually prohibit?
Cutting down, topping, lopping, uprooting, wilfully damaging or wilfully destroying a protected tree without the authority's written consent. Damage includes severing roots and compacting the ground over them, which is why construction activity inside a root protection area matters. Orders can cover individual trees, groups, areas or whole woodlands, and the schedule to the order says which.
Can I do anything to a protected tree without consent?
Limited exemptions exist, including dead trees and work urgently necessary to remove an immediate risk of serious harm, both subject to notice requirements, and work required to implement a full planning permission. The exemptions are narrower than people assume and the burden of proving one falls on you. Take arboricultural advice and photograph the tree before any work.
How long does a TPO consent application take?
The authority has eight weeks to determine an application for consent to carry out works to a protected tree, and there is no fee. A refusal or a condition can be appealed to the Planning Inspectorate. Where the works are part of a wider development proposal, they are normally handled through the planning application rather than separately.
Does a TPO mean the tree can never be removed?
No. Removal can be justified where the arboricultural case supports it, or where the planning balance favours the development and replacement planting is secured. What will not work is applying for removal because a tree is inconvenient for a layout drawn without regard to it. Design around first, then argue for removal only where you have to.
What happens after a protected tree is removed?
A duty to plant a replacement tree of an appropriate size and species in the same place normally follows, either under the statutory duty that attaches to removal or through a condition on the consent. The replacement then becomes protected by the original order. Build the replacement into the landscape drawings rather than treating it as an afterthought.
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.