Send the online request
Use Swansea Council’s treatment quote form for knotweed on land you own or are responsible for.
Swansea Council
Council knotweed help, from first report to treatment
A plain-English guide to the council’s official service, current contact routes and the questions residents ask before arranging work.
Independent guide: this website is not Swansea Council. Service details below link to the council’s own pages and were checked on 13 September 2026.
Official treatment route
How the council process works
Arrange a site visit
The council says it will respond within 10 working days to arrange an appointment.
Receive a free quote
A visit establishes the affected area; the quote is then based on its size.
Agree treatment
Confirm the method, visits, access, responsibilities and any guarantee in writing before work begins.
Who to contact
General enquiries
01792 636000In person
Y Storfa, 277–278 Oxford Street, Swansea SA1 3EL
By post
Y Storfa, PO Box 826, Swansea SA1 9WR
Check current opening hours on the council website before travelling.
Choose the right route
Council land or street
Contact the council with the exact location and photos; do not disturb the stand yourself.
Council contact optionsKnotweed FAQs
Before you contact the council
Is the service available for leasehold property?+
Yes. Swansea Council says it does not matter whether a home or business is freehold or leasehold.
What if I am a tenant?+
Check the tenancy agreement to identify who is responsible for the grounds or garden and who must pay for treatment. Speak to the landlord or managing agent where responsibility is unclear.
Is the quote free?+
Yes. The council states that it visits the premises and provides a free quote based on the size of the affected area.
How quickly will the council reply?+
Its current treatment page says it will get back to applicants within 10 working days to arrange an appointment.
Can the council identify a plant from this website?+
The official pages provide identification guidance, while the treatment service begins with an online request and site visit. Do not cut or dig a suspected plant while waiting.
Does the council have to remove knotweed from private land?+
No general duty makes the council remove it from private property. The owner or occupier normally manages the land; Swansea Council instead offers a chargeable treatment service after a free quote.
What if it is on council land?+
Use the council’s general contact route and give an exact location, photographs and nearby landmarks. The treatment quote form is intended for land for which you are arranging treatment, not as a confirmed dedicated public-land reporting form.
Can knotweed be put in household or garden waste?+
No. Knotweed material and contaminated soil need controlled handling. Do not compost it, put it in green waste, strim it or move fragments away from the site.
Can I treat growth crossing from a neighbour?+
Do not enter or treat someone else’s land without permission. Record the boundary and growth with dated photographs, tell the owner in writing and obtain professional advice if spread continues.
Will treatment solve a mortgage problem immediately?+
A lender may ask for a professional survey and an insurance-backed management plan. Ask the lender exactly what it requires; treatment usually takes several growing seasons.