Leading the Future of Invasive Weed Management

A Japanese Knotweed Survey is a professional inspection carried out by a qualified invasive weed specialist to identify whether Japanese Knotweed is present on a property and assess the level of risk it poses.

Whether you're buying a home, selling a property, managing commercial land or simply concerned about a plant you've discovered, a professional survey provides certainty. Our specialists inspect the entire site, including front and rear gardens, neighbouring land where visible, and the surrounding area. Where appropriate, we also utilise drone technology to safely inspect inaccessible areas.

Following the inspection, you'll receive a comprehensive report detailing whether Japanese Knotweed is present, the extent of any infestation, photographic evidence, recommendations for treatment if required, and information suitable for mortgage lenders or solicitors where necessary.

A survey can save thousands of pounds by identifying issues before they become major problems and is often the first step towards obtaining a professional management plan.

The Japanese Knotweed National Register is one of the UK's largest publicly accessible databases of reported Japanese Knotweed locations. It allows homeowners, buyers, surveyors, solicitors and developers to search for reported infestations across the country using a postcode or location.

The register helps people understand whether Japanese Knotweed has previously been reported nearby and provides valuable information when purchasing property, carrying out due diligence or simply checking the local area.

If you discover Japanese Knotweed on your own land, you can also submit a report to help improve the accuracy of the register and assist others within your community.

Although the register provides valuable information, it should not replace a professional survey, as not every infestation will have been reported. If you're purchasing a property or require certainty, we always recommend arranging a professional Japanese Knotweed Survey.

Japanese Knotweed has developed an unfair reputation for "growing through concrete." While it cannot break through sound concrete or building foundations, its vigorous underground rhizomes can exploit existing weaknesses, cracks and joints in structures.

It can damage patios, walls, paths, tarmac, drains and retaining walls by expanding into small gaps over time. Left untreated, this can lead to expensive repairs and may affect mortgage lending or property sales.

If Japanese Knotweed is growing close to your property, the best course of action is to arrange a professional survey to determine the actual level of risk. Every site is different, and early identification allows the most effective treatment plan to be implemented.

Many people have heard of the old "7-metre rule", but professional guidance has evolved significantly in recent years.

Today, surveyors assess Japanese Knotweed based on its location, extent, condition and the risk it presents to structures, rather than relying on a simple distance measurement. A small infestation close to a building may present less risk than a large, well-established infestation further away.

If Japanese Knotweed is present on your property or nearby, a professional survey will determine whether any action is required and provide recommendations tailored to your individual circumstances.

The cost of a Japanese Knotweed Survey depends on the size of the property, its location and the type of report required.

Residential surveys are typically straightforward, while commercial sites, development land and mortgage-related inspections may require additional assessment and reporting.

At Japanese Knotweed Agency, we provide clear, fixed pricing wherever possible with no hidden costs. Our experienced surveyors cover properties throughout the UK and can often arrange inspections within just a few days.

If you're unsure which survey you require, simply contact our team and we'll recommend the most appropriate option.

If Japanese Knotweed is growing on neighbouring land, it is important to monitor the situation carefully. While it is not illegal to have Japanese Knotweed on private property, landowners have a responsibility to prevent it from spreading onto neighbouring land or into the wild.

If you believe neighbouring Knotweed is encroaching onto your property, a professional survey can establish whether rhizomes have crossed the boundary and advise on the most appropriate course of action.

Early intervention is usually far less expensive than allowing the infestation to spread further.

Yes. Japanese Knotweed can be successfully managed and removed using professional treatment programmes.

Several treatment options are available depending on the site, including herbicide programmes, excavation and our innovative Thermo-Electric Treatment, which provides a non-chemical alternative suitable for many sensitive environments.

The most appropriate solution depends on the size of the infestation, site conditions and future land use. Following a survey, we'll recommend the most effective treatment plan for your property.

If you suspect you've discovered Japanese Knotweed, avoid cutting, strimming or attempting to dig it out yourself, as this can encourage further spread and make future treatment more difficult.

Take clear photographs of the leaves, stems and surrounding area, note the location, and contact a professional Japanese Knotweed specialist for identification.

Our experienced surveyors can quickly confirm whether the plant is Japanese Knotweed and advise on the most appropriate next steps. If treatment is required, we'll provide a clear management plan tailored to your property.

For additional peace of mind, you can also search our Japanese Knotweed National Register to see whether the plant has previously been reported nearby.