Japanese knotweed treatment in Bath
If you've found Japanese knotweed in a garden or on a site in Bath, professional treatment is the way to stop it spreading and to satisfy a buyer's surveyor or mortgage lender. We can introduce you to one vetted knotweed specialist who covers your property in Bath.
Beatrice Vasey is a horticulturist, not a knotweed treatment company. We introduce you to one vetted knotweed specialist and are paid a referral fee by that business.
Knotweed rules in Bath
- Your council
- Planning and council land in Bath sit with Bath and North East Somerset Council. On private land, controlling knotweed is the owner's job, not the council's.
- The law
- Don't let it spread into the wild. Having knotweed on your land isn't an offence, and you don't have to remove it. Under the Wildlife and Countryside Act 1981 it is an offence to plant it or otherwise cause it to grow in the wild, and councils can serve a community protection notice where it is harming the local community's quality of life.
- Disposal
- Knotweed waste and soil containing its rhizome may be classed as controlled waste. Off site it must go with a registered waste carrier to an authorised site. Burying it on site means going at least 5 m deep, or 2 m inside a membrane, and telling the Environment Agency at least a month beforehand.
Where knotweed spreads around Bath
Knotweed spreads mainly from small pieces of rhizome or stem moved in soil, on tools and machinery, or by water, which is why it lines rivers, railways and roadsides. In Bath, gardens and sites backing onto the River Avon and the Kennet and Avon Canal are worth checking each spring, and soil brought in for landscaping should come from a known source.
Treatment options, timing and costs
Most gardens in Bath are treated with a herbicide programme over at least three growing seasons. Building sites usually need the faster option of excavation, or burial on site.
| Option | When | Typical cost |
|---|---|---|
| Survey and management plan | Any time of year; easiest to identify from late spring to autumn | Survey about £100 to £350; a guarantee adds about £150 to £750 |
| Herbicide treatment programme | Late summer to autumn, after flowering; September to early October often works best | About £500 to £3,000 for a typical garden stand, over the whole programme |
| Excavation and removal | Any time of year | About £4,000 to £20,000 for a stand under 50 m² |
| On-site burial | Any time of year, after notifying the regulator | About £3,000 to £15,000 |
| Root barrier | Any time of year | Quoted per site |
Typical prices from published cost guides. Your specialist quotes for your property.
Your knotweed specialist in Bath
We pass each Bath enquiry to one vetted knotweed specialist who covers your property. You get an email naming them before your details are shared, and they survey and quote you directly. We are paid a referral fee by that business, as set out in how our partner network works.
We also arrange knotweed treatment in Bristol, Cardiff and Southampton.
In Bath we can also introduce you to specialists for bat surveys, ecological surveys, tree surveys, tree surgery and landscaping, all listed on our Bath page.
Japanese knotweed questions in Bath
Is it illegal to have Japanese knotweed in my garden in Bath?
No. Having it on your land isn't an offence, and you don't have to remove it. It is an offence to plant it or cause it to grow in the wild, for example by dumping cuttings or soil, and the council can act if it is harming neighbours.
Can Bath and North East Somerset Council make me treat knotweed?
Only in limited cases. Bath and North East Somerset Council can serve a community protection notice where knotweed is part of persistent, unreasonable behaviour harming the local community, after a written warning. Breaching one can mean a fixed penalty of up to £500, or a fine of up to £2,500 on conviction.
My neighbour's knotweed is spreading into my garden in Bath. What can I do?
Talk to them first, and keep photos and dates. Since Network Rail v Williams and Waistell (2018), rhizome spreading onto your land can be a private nuisance. A specialist survey of both sides of the boundary gives you evidence and a plan, and a root barrier can protect your side while treatment runs.
Will knotweed stop me selling or mortgaging my home in Bath?
Not if it's managed. You'll need to declare it on the TA6 property information form, and for properties in RICS categories A and B most lenders want a specialist survey, a management plan and an insurance-backed guarantee before they lend.
Will I need other surveys for planning in Bath?
Possibly. If knotweed is on a development site, plan treatment or excavation before work starts so machinery doesn't spread it. A planning application may also need an ecological survey in Bath, which records invasive plants on the site.
Get a knotweed treatment quote in Bath
Tell us where the knotweed is and what's going on. Beatrice reads every enquiry.