M4 corridor (west)

Knotweed removal across South & West Wales.

Cardiff, Swansea, Newport, Bridgend & Carmarthenshire

Japanese knotweed is endemic across South and West Wales — a legacy of coal-mining, copper smelting and unmanaged riparian corridors along the Taff, Usk, Tawe and Tywi. Our Cardiff and Swansea crews cover every CF, NP and SA postcode in the region.

07582 869979 Request a survey

⟶ Local landing pages

Every South Wales town we cover

Each link below opens a dedicated city landing page with hotspots, postcodes covered, lender notes and an FAQ tailored to that town.

⟶ Why here

Why South Wales is hit so hard

Mild, wet Atlantic weather, dense Victorian terraces backing onto railway embankments, and decades of post-industrial fly-tipping make South Wales one of the worst affected regions in the UK. Mortgage-blocking surveys are a weekly occurrence in CF11, CF14, NP19 and SA1.

⟶ What we deliver

South Wales service in detail

PCA-trained surveyors with local route knowledge
Fixed-fee written quotes before any work begins
Lender-accepted insurance-backed guarantees (5 & 10 year)
Same-week site visits across the whole region
Licensed off-site disposal with full waste duty-of-care

⟶ Quick links

Jump straight to a South Wales town

Want a wider view? See every area we cover (40 cities & towns) or request a survey.

⟶ References

Sources and conditions

Statements about the law, waste handling, lender treatment and guarantees on this page are drawn from the sources below. Requirements change and individual lenders, insurers and local authorities apply their own criteria — check the current source before relying on any point.

Japanese knotweed and residential property (Guidance Note, 2022)
RICS
The current valuation-and-management framework surveyors use. It replaced the 7-metre rule with an assessment of impact on amenity and on structures.
Wildlife and Countryside Act 1981, section 14 and Schedule 9
legislation.gov.uk
Makes it an offence to plant or otherwise cause Japanese knotweed to grow in the wild. It is not an offence simply to have it on your land.
Environmental Protection Act 1990, Part II — duty of care for controlled waste
legislation.gov.uk
Knotweed-contaminated soil and plant material is controlled waste; movement off site requires a registered carrier and a permitted receiving site.
Anti-social Behaviour, Crime and Policing Act 2014, Part 4 — community protection notices
legislation.gov.uk
The route councils use where an owner's failure to control knotweed has a persistent detrimental effect on others' quality of life.
Prevent Japanese knotweed from spreading
GOV.UK / Environment Agency
Official guidance on treatment, disposal and on-site burial requirements in England.
Invasive non-native species guidance
Natural Resources Wales
The equivalent regulatory position for our Welsh sites, including waste and watercourse considerations.
TA6 Property Information Form
The Law Society
The seller's disclosure question on Japanese knotweed, and the reason a management plan and guarantee are asked for at conveyancing.
Invasive weed control — homeowner guidance
Property Care Association (PCA)
Industry code of practice for survey, management plans and insurance-backed guarantees.

Reviewed by

The survey team

PCA-certificated surveyors, Japanese Knotweed Elimination

PA1 / PA6A certificated surveyors who carry out the site visits, write the management plans and sign off the reports issued to lenders and solicitors.

Reviews the regional coverage, travel and service claims on this page.

What this page can't tell you

Guidance is general. Identification, treatment choice and timescales can only be confirmed by a site visit — photographs alone are indicative.
Lender and insurer requirements vary by institution and change over time. We state what is typically accepted, not what any named lender will accept on your case.
Guarantee (IBG) eligibility depends on the plan chosen, the survey findings and the underwriter's acceptance. It is not automatic.
Legal points summarise published law and guidance current at the review date. They are not legal advice.

Last reviewed 9 August 2026 · Questions on anything stated here: 07582 869979