Japanese knotweed is one of the few garden problems that can genuinely stop you selling or remortgaging your home. It grows aggressively, spreads from the smallest fragment of root, and lenders treat it as a serious risk. The good news is that it is manageable — with the right plan and the right paperwork.
We help homeowners across Dover, Deal, Folkestone and the surrounding East Kent villages deal with knotweed properly. Enquiries go to a selected, insured specialist who surveys the site, tells you honestly what you are dealing with, and provides either a treatment programme or full removal — with the insurance-backed guarantee mortgage lenders ask for.
Why knotweed is a mortgage problem
When a surveyor spots knotweed, they flag it, and most lenders then require evidence that it is being dealt with by a professional. Without a recognised treatment plan and guarantee, the sale or remortgage usually stalls. It is rarely the plant itself that holds things up — it is the missing paperwork. A proper management plan with an insurance-backed guarantee is what satisfies the lender and lets the transaction proceed.
Treatment or removal — two routes
- Herbicide treatment is the lower-cost route. A specialist treats the knotweed over several growing seasons and provides a guarantee. It is ideal if you are staying put or have time before a sale.
- Excavation and removal physically digs the knotweed out for a fast, permanent result. It costs more but is often the right choice when you are selling soon or developing the land.
The survey tells you which route fits your situation, your timescale and your budget.
Local knowledge
Knotweed spreads readily along railway lines, watercourses and the sort of disturbed ground common around Dover's port, transport corridors and older developments. That means it often appears at boundaries and on land that has been previously worked, so early identification and a clear plan matter here.
Our japanese knotweed removal services
Knotweed Survey & Management Plan
Identification, extent survey and a written management plan lenders will accept.
Knotweed Herbicide Treatment
A multi-season herbicide programme, usually with an insurance-backed guarantee.
Knotweed Excavation & Removal
Full dig-out for a fast, permanent solution when you are selling or developing.
Areas we cover
Dover · Deal · Folkestone
Frequently asked questions
How much does knotweed removal cost in Dover?
A herbicide treatment programme typically runs from around £2,500 to £5,000 over several seasons, while full excavation and removal for a fast result is usually £5,000 to £15,000+ depending on the size of the stand and site access. A survey is the only way to get a firm figure.
Will knotweed stop me selling or remortgaging?
It can. Most lenders will only proceed if there is a professional treatment plan in place with an insurance-backed guarantee, or if the knotweed has been fully removed. Getting that paperwork is exactly what unblocks a stalled sale.
Is it illegal to have Japanese knotweed?
No, it is not illegal to have it on your land. But you must not allow it to spread onto neighbouring property or into the wild, and the plant is classed as controlled waste, so it cannot go in normal rubbish. That is why DIY attempts so often cause more problems.
Can I just dig it out myself?
It is strongly discouraged. Knotweed regrows from tiny fragments of root, so disturbing it without the right method spreads it further, and the excavated material is controlled waste that must be disposed of legally. Professional treatment or licensed removal is almost always the safer route.