Invasive Plants Check
Check any UK property for all notifiable invasive plant species. Searches open source records within a 5-mile radius — covering Japanese knotweed, giant hogweed, Himalayan balsam, and more.
Data sourced from publicly reported sightings. Most infestations are recorded, but a physical invasive plant survey is recommended for certainty.
Open source data · 5-mile search radius · Not all infestations are formally reported
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Invasive Plants FAQ
Which invasive plants does this check cover?
This tool checks for all seven commonly notifiable invasive species in the UK: Japanese knotweed, giant hogweed, Himalayan balsam, rhododendron ponticum, floating pennywort, New Zealand pygmyweed, and cotoneaster. All are subject to legal restrictions on spread under the Wildlife and Countryside Act 1981 (as amended).[1]
Are all invasive plants as serious as Japanese knotweed?
Japanese knotweed is the most mortgage-relevant invasive plant — lenders specifically flag it. The others are less likely to affect mortgage availability but can still have legal, environmental, and financial implications. Giant hogweed is also dangerous due to its toxic sap. All should be disclosed on the TA6 form if known.
What if a species shows "No data"?
No data means no formal sightings have been recorded in open source databases for that species within the 5-mile search radius. It does not guarantee absence — infestations on private land or in gardens are frequently never formally reported. A physical invasive plant survey from a PCA-accredited contractor is the only way to confirm a property is clear.
Do invasive plants need to be disclosed when selling?
Yes — all known invasive plants must be declared on the TA6 property information form under environmental matters. Failure to disclose is misrepresentation and can lead to legal claims from buyers after completion. This applies even to treated, historical infestations.[2]
Sources
Further reading
Non-native Species Secretariat · GOV.UK invasive plants guidance
Integrate into your own product
Free to startExact sighting counts and closest recorded distance in metres for all 7 notifiable invasive species within the 8km search radius — the raw data behind every detection result, per species.
Structured as JSON · queryable by UPRN or postcode · ready to embed in any application
Exact measurements
Real values — distances, concentrations, counts — not rounded ratings
29M+ UK properties
Every address queryable by UPRN or postcode
REST API
JSON responses, OpenAPI docs, sandbox — first call in under 5 minutes
Free tier: 100 API calls/month across all endpoints, no credit card required. Paid plans from £29/month for production use. Compare plans →