Two things decide this, and only one of them is about the hedge. Take the legal question first, because it is the one most often got wrong and it takes a paragraph to settle.
There is no legal height limit
You are not required to keep a hedge at two metres. Nobody can make you cut one simply for being taller than that, and no council has the power to impose a general height limit on garden hedges.
What two metres marks is the threshold at which a neighbour may complain to Herefordshire Council under Part 8 of the Anti-social Behaviour Act 2003. Even then the complaint only qualifies if the hedge is a line of two or more evergreens, over two metres, acting as a barrier to light or access — and the neighbour has to have genuinely tried to resolve it directly first. The council charges a fee to take it on.
Now the question that actually decides the work
What is the hedge made of? This determines more than everything else combined.
| Hedge | How far it can come down |
|---|---|
| Yew | Hard, into bare wood — recovers reliably |
| Beech / hornbeam | Hard, to the framework |
| Laurel | Hard — regrows vigorously |
| Privet | Hard — very forgiving |
| Hawthorn / blackthorn | Hard — traditional practice |
| Holly | Hard, but slow to fill back in |
| Leylandii | Green growth only |
| Lawson, thuja, spruce | Green growth only |
Everything in the last two rows shares one property: cut past the green and the bare brown wood will never green up again. That is a hard limit on the job, not a warning about appearance.
The good news for tall conifer hedges specifically
The green on a conifer hedge is almost always deepest on the top, because that is where the light falls. So on a hedge that has got tall and shaggy, height reduction is frequently more achievable than width reduction — which is fortunate, since height is usually the complaint.
Push a hand down into the top of the hedge and find how far the green goes. That measurement, not the figure you had in mind, is what any contractor can deliver.
How far down to aim
The useful target is a height you can maintain, not a number that sounds right. If the hedge comes back to something reachable from the ground or a step ladder, it stops being a job you have to book and becomes one you can keep on top of.
When to do it
This matters more for a hard cut than for a trim. Renovation on a broadleaf hedge belongs in late winter, before growth starts — the hedge then has the entire season ahead of it to recover, and it will look bare for one summer rather than two.
A hard cut in July stresses the hedge at the point it is least able to respond, and the recovery is slower and patchier. If a hard reduction is what you need and it is currently midsummer, it is usually worth waiting.
Conifer work is different, because it is trimming within the green rather than renovation. Late summer suits it well — growth has finished, so the cut holds its shape through the winter.
Nesting birds, accurately
It is not an offence to cut a hedge during the nesting season. The offence under the Wildlife and Countryside Act 1981 is intentionally taking, damaging or destroying a nest while it is in use or being built.
So the hedge is checked properly before the machine starts, and any section with an active nest is left until the birds have finished with it. The RSPB puts the main season at March to September and suggests cutting outside it where you have a free choice — good practice rather than a legal requirement.
The 1 March to 31 August ban that gets quoted at householders comes from the Management of Hedgerows (England) Regulations 2024, which apply to agricultural land and expressly exclude hedgerows within the curtilage of a dwelling house.
Got a hedge that's got above you?
Tell us what it is and roughly how tall. We'll tell you honestly how far it can come down.
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