Tree works for electricity line clearance

Tree clearance near electricity lines is carried out under statutory powers, which means the distribution network operator does not need your consent and does not need consent from the council for a protected tree. The Electricity Act 1989 gives a licence holder the power to fell or lop any tree that obstructs or interferes with its lines, or that poses a danger, after serving notice on the owner or occupier. Tree Preservation Order consent is not required where the work is necessary for the operation of the undertaking.

That surprises rural owners who have spent years protecting a hedgerow oak. The power is real, but it is bounded, and the boundaries are worth knowing.

Why line clearance sits outside the usual consents

Electricity supply is a statutory undertaking, and the legislation that created it gave operators the practical powers they need to keep the network safe. A branch growing into an 11kV line is a risk to life and a cause of supply interruption, and neither can wait for a six week notification period.

So Parliament provided a self-contained procedure. The operator identifies the obstruction, gives notice, and may carry out the work itself if the owner does not. And the council's tree protection regime steps back, because the relevant exemptions in the tree preservation legislation cover works necessary for the operation of a statutory undertaking and works required to comply with a statutory obligation.

The clearance distances themselves come from the electricity safety regulations rather than from planning. Operators work to minimum separations between conductors and vegetation, allowing for conductor sway, ice loading and seasonal growth, so the cut is always more generous than the gap you can see from the ground.

The statutory basis for the works

The power sits in the schedule to the 1989 Act dealing with the powers and duties of licence holders. Three elements matter in practice.

Alongside that sits the safety duty. Where vegetation touches a conductor, the operator is dealing with an immediate hazard and the statutory sequence gives way to the safety response, which is why emergency cutting sometimes happens before any paperwork arrives. The Health and Safety Executive's guidance on avoiding danger from overhead power lines explains the clearance thinking from the other direction, for anyone working near a line.

Notice to the owner before cutting

The notice tells you what the operator intends. Read it rather than filing it, because it sets the scope and starts the clock.

A proper notice identifies the trees, describes the work and gives a period within which the owner may do it instead. Doing the work yourself has an advantage worth considering: you choose the arboriculturist, and the cut can be shaped rather than cleared. Operators work to a specification and a programme, and a crew clearing a 20km circuit will not be making fine judgements about your beech.

If you intend to object, do it in the form and within the period the notice states. An informal phone call to the depot is not a counter-notice and will not preserve your position.

Protected trees and the exemption that applies

The exemption disapplies the consent requirement, not the protection. The tree remains protected, which matters for everything outside the clearance work.

Two practical consequences. First, the operator's exemption does not extend to you: if the crew leaves a stem that you then want to remove for your own reasons, you need consent in the ordinary way. Second, the exemption covers what is necessary for the undertaking, so wholesale felling of a tree that only needed a crown reduction is open to challenge.

Wildlife law applies regardless. Nesting birds are protected in the breeding season and bat roosts are protected year round, and no part of the Electricity Act displaces that. Where a tree carries roost features, the ecological assessment should happen before the cut, and the Bat Survey page sets out when one is needed.

Conservation area trees are treated the same way as Order trees for these purposes. If you are unsure whether a tree is protected at all, ask the council, because the exemption question only arises once protection is established.

Disputes about the extent of cutting

Most disagreements are about degree rather than principle. The owner accepts that something must be cut and objects to how much.

The statutory route is the counter-notice, which refers the question to the Secretary of State. Before reaching for it, get arboricultural advice on what the line requires, because an objection that ignores the clearance standard will fail. A consultant who has worked on utility clearance can usually negotiate a specification that keeps the tree's form, using targeted reduction over several visits rather than one heavy cut.

Illustrative example: a line crossing a paddock with three mature oaks beneath it. The operator's notice proposes topping all three to below conductor level. The owner's consultant proposes directional pruning away from the conductors on two trees, with the third reduced, and a longer term plan to divert the line at the next asset replacement. The scope is settled by agreement. That outcome depends entirely on having the advice before the crew arrives.

Compensation, making good and reinstatement

The legislation requires the licence holder to pay the reasonable costs where the owner carries out the work on notice, and to make good damage caused by its own entry onto the land. Compensation for loss or damage arising from the exercise of the powers is also provided for.

What that does not cover is the amenity value of a tree reduced to a stub. There is no payment for the loss of a view or the character of a hedgerow, which is the honest limit of the regime. Replacement planting away from the line is sometimes offered and is worth asking for. Where damage to roots or ground conditions is involved, our note on utility trenching close to trees on a development site covers the same soil disturbance issues that arise from access tracks and crane pads.

Cyclical clearance programmes

Operators run vegetation management on cycles, inspecting circuits and scheduling cutting over a period of years. If your land carries a line, the clearance will come round again.

Planning for the cycle beats reacting to it. Replace growth under the line with species that mature below conductor height, keep a record of what was agreed last time, and raise diversion or undergrounding at the point where the operator is planning asset replacement rather than when the crew is booked. Where trees are being planted as part of a development, check the line position before the landscape scheme is fixed, because a tree planted under a conductor is a tree with a short future and future growth is routinely overlooked, as our note on tree shading of solar arrays and future growth shows in a different context.

What to record if you disagree

1. Photograph each tree from several angles before any work, with a dated reference.
2. Keep the notice, the envelope and any correspondence, including depot phone calls with names and times.
3. Commission a written arboricultural opinion on the clearance needed, before the deadline in the notice.
4. Record the tree's stem diameter, height and crown spread, so the extent of the cut can be measured afterwards.
5. Note any protected status and tell the operator in writing, so a later dispute about scope has a paper trail.
6. Photograph access routes and ground conditions before entry, for any making good claim.
7. Serve the counter-notice in the form the notice specifies, within the period stated.

Where trees will be affected by a development rather than by line clearance, a survey to BS 5837:2012 is the document the council expects, and our Tree Survey page explains what it covers.

This is general guidance, not legal advice. The procedure, notice periods and compensation provisions are set by the Electricity Act 1989 and the electricity safety regulations, so read the notice carefully and take advice before relying on this.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.