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Japanese Knotweed’s 3-meter Rule

When you look online for information regarding a Japanese Knotweed infestation and how to control it, you may read about a rule called the 3-meter rule. The 3-meter rule for Japanese Knotweed is a guideline used across the UK by mortgage lenders and surveyors when assessing property with a Japanese Knotweed infestation.

It refers to the distance within which the presence of Knotweed in a property’s vicinity could potentially impact the value of the property and risk to the structure.

Identifying the Space Issue

According to the 3-meter rule, if Japanese Knotweed comes within approximately 10 feet of habitable space, conservatories or structures with a solid foundation – such as buildings, sheds or garages – it is significant risk. The reason behind that ruling is that Japanese Knotweed have an extensive underground Rhizome system that has the potential to damage buildings and structures, leading to significant costs for eradication and remediation.

When Knotweed invades the 3-meter space, it raises a flag for potential buyers, lenders and insurers. In most cases, a mortgage lender will require a professional knotweed survey and Japanese Knotweed management plan to fully address the issue before any loans can approve on the property.

Although the 3-meter rule is not a legal requirement, it is a guideline used by industry professionals to ascertain risks posed by Japanese Knotweed on your property if you are selling up or buying. It is advisable to seek advice from a qualified surveyor or specialist in Japanese Knotweed treatment to understand the implications and remedies available.

Knotweed Up to Your Property Boundary

If your Knotweed infestation has grown up to your property boundary or started to grow within it, it is essential to promptly address it and prevent further spread.

Many plants can be mistaken for Japanese Knotweed, so you need to know that this invasive species is as such. Seek professional advice from a qualified surveyor or Japanese knotweed expert to assess its extent and risk and inform you of your legal obligations to contain the spread from reaching neighbouring property or surrounding natural areas.

If Japanese Knotweed is within your property, work with an invasive species control company to develop your management plan. Eradication is often challenging, so control and treatment may be the more realistic goal. No matter what, avoid conducting any DIY efforts to eliminate the Knotweed growth and notify your neighbours of the problem and the control efforts you are professionally conducting.

If you plan to sell your property, you must disclose the presence of Knotweed to potential buyers. Failure to disclose will lead to legal issues later.

Contact the team at Solutions for Japanese Knotweed today to prevent knotweed from destroying your property value.