Free photo check · Mon–Fri 8am–6pm, Sat mornings · St Helens, Rainhill, Haydock and Newton-le-Willows
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Knotweed survey in St Helens

A site visit to confirm the plant and map the stand.

Free photo ID check · Mon–Fri 8am–6pm, Sat mornings

What this job actually involves

Knotweed survey — how it works here

Knotweed survey in St Helens

We check the plant in person, pace out the stand, photograph it and record how close it is to the house, the outbuildings, the walls and the drains. The report then lays out spraying and digging options with prices, in a format that lenders and conveyancers recognise. A typical St Helens garden takes under an hour.

What a knotweed survey in St Helens involves

We start at the plant, looking at the stems, the leaf shape and any dead canes left from last year, then follow the boundary to see whether the stand carries on beyond it. Photographs are taken from marked positions so the same view can be repeated later, and measurements are taken from the outermost canes. Distances to the house, drains, outbuildings and fences go in the report, because those are the numbers a lender or contractor asks for first.

A single clump in a tidy lawn is quick to assess. A band along a canal bank, a neglected yard or a cleared plot takes more time because the edges are buried under brambles. Access counts too: a locked gate, a steep slope or an unfriendly dog all add minutes. Tell us when you book and the £275 survey price stays straightforward.

Please leave the plant untouched. Cutting, strimming or pulling it spreads fragments and makes mapping harder. It does help to clear away anything stacked round the base of the stems, and to find any earlier paperwork such as a valuer's comment or a neighbour's letter. Winter canes are enough to identify the plant, but summer gives the clearest picture of how far it has spread.

On the ground

What this looks like around St Helens

Red-purple shoots lifting the surface beside a garage door.
Red-purple shoots lifting the surface beside a garage door.
A summer stand on a canal bank, with a brick bridge behind.
A summer stand on a canal bank, with a brick bridge behind.
A trained operative treating a stand in full leaf.
A trained operative treating a stand in full leaf.
Step by step

How knotweed survey works with us

  1. Send a photo.

    One leaf and a length of stem will do. Use the contact form or message us. No cost.

  2. We visit and survey.

    If it is knotweed we come out, measure the stand and record what is near it.

  3. Spray or dig.

    Treatment over several seasons, or excavation when the calendar will not wait.

  4. Report, then follow-ups.

    A written plan for you and your lender, plus return visits until nothing regrows.

What it costs

Clear pricing for knotweed survey in St Helens

Every job starts with a free photo check. If a visit is needed, you get a written quote before any work starts — no obligation, no surprises.

See full price guide →

Survey from
£275
  • Free identification from a photo
  • Written quote before work starts
  • Report suitable for lenders and buyers
Before you ring

Questions about knotweed survey

Do you need to come into the house?
Only if there is no other way to the garden. Where there is side or rear access we can arrange it beforehand.
How do I know if it is Japanese knotweed?
Look at the stem first. It is hollow like bamboo, spotted with purple, and kinks in a zig-zag at each node. Leaves are shaped like shields with a flat base, and creamy flower clusters appear in late summer. Dead brown canes can remain upright all winter. A photo sent to us is faster than matching pictures online.
Is it illegal to have knotweed in my garden?
Having it on your land is not a crime. The offence is letting it spread into the wild, and any soil or cuttings are treated as controlled waste. If it crosses into a neighbour's property they may have grounds for a claim against you.
Will knotweed stop me getting a mortgage?
Not by itself. Many lenders will proceed when there is a professional survey, a treatment plan and an insurance-backed guarantee that can transfer to the buyer.
How long does treatment take?
A spraying programme normally lasts three to five growing seasons, followed by monitoring. Excavation takes a few days but costs noticeably more.
Can I just dig it out myself?
We advise against it. Tiny pieces of rhizome regrow, and the soil cannot go in the household bin or to the council tip.
Where we do it

Knotweed survey across St Helens

Eccleston· Windle· Thatto Heath· Parr· Rainhill· Haydock· Newton-le-Willows· Sutton· Blackbrook· Clock Face

Also available

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