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.
⟶ Coverage
Carmarthen to the M25.
Plus the West Midlands.
Crews leave Cardiff, Bristol, Reading and Birmingham daily. Most enquiries get a same-week visit; urgent property sales get prioritised.
⟶ Regional clusters
Choose your region.
Find your local town.
We group our coverage into seven regional clusters. Each one is a hub page linking out to every town and city we cover in that patch — with regional context on why knotweed thrives there.
M4 corridor (west)
South & West Wales
Cardiff, Swansea, Newport, Bridgend & Carmarthenshire
9 towns covered
South East Wales & the Borders
Monmouth, Chepstow & the Wye Valley
4 towns covered
M4 corridor
South West & M4 Corridor
Bristol, Bath and the wider South West
11 towns covered
M4 corridor (east)
Thames Valley
Swindon, Reading, Wokingham, Maidenhead, Slough & Oxford
6 towns covered
M4 corridor (east)
Greater London
All London boroughs
1 town covered
West Midlands hub
West Midlands
Birmingham, Solihull, Coventry, Wolverhampton & the Black Country
4 towns covered
M4 → Birmingham link
Severn Vale & Worcestershire
Gloucester, Cheltenham, Stroud & Worcester
6 towns covered
The Wye and Monnow are SAC-protected rivers — patient, NRW-compliant herbicide programmes are almost always the right call here. We work the Welsh borders from Chepstow up to Monmouth and across into the Forest of Dean fringe.
The Avon valley, Bath's hillside terraces, the Bristol-to-Bath railway path, the Somerset Levels and the Exe corridor make the South West some of the most knotweed-dense ground in England. Our Bristol crew covers BS, BA, TA, BS, EX, DT and SP postcodes daily.
The Thames Valley sits on a knotweed-dense stretch of the M4. Riparian growth along the Thames and Kennet — and the network of disused gravel pits between Reading and Maidenhead — is among the worst in southern England. Our Reading crew covers SN, RG, SL, OX and HP postcodes.
Boroughs along the Thames, the Lea Valley and disused rail land carry the worst knotweed loads in London. Garden boundaries backing onto these features are the most common survey trigger across N, E, SE, SW and W postcodes.
Birmingham is the northern anchor of our service map — the natural extension of the M4 corridor up the M5 and M42. Our Birmingham crew covers the whole West Midlands conurbation (B, CV, WV and DY postcodes), with daily routes through Solihull, Coventry, Wolverhampton and the Black Country.
Gloucester, Cheltenham, Stroud and Worcester — the Severn floodplain, the Five Valleys and the Worcester & Birmingham Canal form the bridge between the M4 corridor and the West Midlands, and round out our regular service patch on the way up to Birmingham.
⟶ Every city we serve
Local pages.
Local detail.
South Wales · routine crew
Cardiff
South Wales · routine crew
Swansea
South Wales · routine crew
Newport
South West England · routine crew
Bristol
South West England · scheduled round
Bath
Thames Valley · scheduled round
Swindon
Thames Valley · routine crew
Reading
Greater London · routine crew
London
West Midlands · routine crew
Birmingham
South West England · scheduled round
Gloucester
South West England · scheduled round
Cheltenham
South Wales · scheduled round
Bridgend
West Midlands · scheduled round
Solihull
West Midlands · scheduled round
Coventry
West Midlands · scheduled round
Wolverhampton
South East Wales · scheduled round
Monmouth
South East Wales · scheduled round
Chepstow
⟶ Travel coverage
Places we travel to for larger projects
These towns sit outside our routine weekly rounds. We take work here when it is a larger project or can be scheduled alongside jobs already booked nearby — so rather than publish a local page implying a standing presence, send us the postcode and we will tell you honestly whether we can help.
- Slough
- Carmarthen
- Maidenhead
- Wokingham
- Oxford
- Worcester
- Weston-super-Mare
- Bridgwater
- Taunton
- Yeovil
- Frome
- Trowbridge
- Stroud
- Exeter
- Salisbury
- Caerphilly
- Neath
- Pontypridd
- Merthyr Tydfil
- Cwmbran
- Ebbw Vale
- Kidderminster
- Hereford
⟶ M4 corridor route
Follow the M4, west to east
Every junction we work, in order. Each link is a full local landing page with hotspots, postcodes and lender-accepted IBG notes.
Outside these areas? Get in touch — we travel for larger projects.
⟶ 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 coverage, travel and local 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 · Questions on anything stated here: 07582 869979