At SE Knotweed, a knotweed survey costs from £150 to £500 for a domestic property, and we often credit the fee against the treatment cost if you proceed with the plan.
A knotweed survey costs from £150 to £500 for a domestic property, often credited against treatment if you go ahead.
A Japanese knotweed survey costs from £150 to £500 for a domestic property, and at SE Knotweed we often credit the fee against the treatment cost if you proceed with the plan. A basic identification visit sits at the lower end and a mortgage report written to a lender's template at the higher end.
The figure turns on the site, the travel and the size of the stand, so treat the range as indicative until we have the address. Book a survey and we will confirm the fee before we visit.
The survey fee covers the on-site inspection, confirmation of the species, a measured record of the stand and the 3 metre zone, the RICS management category and a written report with a costed treatment plan.
A mortgage-format report also carries the visit schedule, the monitoring period and the insurance-backed guarantee term, which is why it costs more than a straightforward identification visit. Everything a solicitor or lender needs arrives in the one document.
A survey moves towards the upper £500 end of the range where the site is large or hard to reach, where the stand runs along a boundary or across more than one property, and where the report must be written to a specific lender's template rather than a plain identification.
Travel to a remote address, a stand that needs mapping across neighbouring land, and a same-week turnaround for a sale under pressure all push the fee towards the upper end. We tell you which factors apply before we book the visit.
A survey costs £150 to £500, while the treatment it prices runs from around £1,200 for a herbicide programme to £12,000 for full excavation, so the survey is the small figure and the treatment the large one. The survey fee is often credited against the treatment if you proceed.
The table sets the survey types against what each covers and the indicative fee, so you can see what you are paying for before you book.
| Survey type | What it covers | Indicative fee |
|---|---|---|
| Photo identification | Species confirmed from clear photographs, no site visit | Often free |
| Site identification visit | On-site inspection, species confirmed, stand measured, verbal advice | £150 to £250 |
| Specialist report and plan | Written report, management category and a costed treatment plan | £250 to £400 |
| Mortgage report | Report written to the lender's template with plan and guarantee term | £350 to £500 |
We often credit the survey fee against the treatment cost when you go ahead with the plan, so a £300 survey effectively comes off the price of the herbicide programme or excavation that follows.
It means the diagnosis rarely adds to the total where treatment is needed. Ask us to confirm the credit when we quote for your site, since it depends on the method and the fee.
A free photo assessment is enough to confirm whether a plant is Japanese knotweed, but a sale, a mortgage or a legal claim needs a paid survey, because only a written report records the RICS category, the measured stand and a costed plan a lender or solicitor can act on.
Send us clear photographs of the stem, leaf and growth habit and we will tell you for free whether it is knotweed. If it is and you need to move a transaction, we will book the full survey.
The £150 to £500 survey fee can form part of a private nuisance claim, alongside the treatment cost, where the knotweed has encroached from a neighbour who knew about it and failed to act, because it is a reasonable expense caused by the encroachment.
Recovery depends on the facts and on the neighbour being in breach of a duty, so take legal advice. Our encroachment claims page sets out what a claim needs.
To book a survey and get a fixed fee, send us the address, a photograph of the stand and any comment a valuer has made, and we will confirm the survey type, the fee and a visit date before we attend.
There are no surprises on the day: you know the fee, what the report will contain and whether it will be credited against treatment. Get in touch to arrange the visit.
Tell us the address and what a surveyor flagged. We confirm the plant, record the RICS category and set out the figures.