How much does it cost to treat Japanese knotweed?

The rate at which Japanese knotweed can grow means that the longer you leave a known problem untackled then the greater the potential costs. Left unchecked, knotweed can cause thousands of pounds worth of damage to your property (and potentially surrounding property), and that’s before you take into account the costs of removing the knotweed itself.

 

 

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So, how much will it cost to remove Japanese knotweed?

Much depends on the extent of the Japanese knotweed invasion, its location, and the best methods for its control and removal. Being able to grow up to 3 metres into the ground can make it extremely difficult to remove. 

You also have to be sure that all traces of it have been removed to make sure that it does not grow back. That is why we recommend that you consult experts on removal rather than attempting a DIY knotweed removal. 

As every Japanese knotweed case is different, it is difficult to put an exact measure on the cost of removal. Removal from a small domestic property would normally be considerably less than an extensive invasion on development land. The proximity to water and other environmental factors can make a difference in what treatments can be used and therefore the cost. Treatments can also involve a combination of methods.

 

How Much Does It Cost To Get Rid Of Japanese Knotweed?

So how much will it cost to remove Japanese knotweed? Much depends on the extent of the Japanese knotweed invasion, its location, and the best methods for its control and removal. Being able to grow up to 3 metres into the ground can make it extremely difficult to remove. 

You also have to be sure that all traces of it have been removed to make sure that it does not grow back. That is why we recommend that you consult experts on removal rather than attempting a DIY knotweed removal. 

As every Japanese knotweed case is different, it is difficult to put an exact measure on the cost of removal. Removal from a small domestic property would normally be considerably less than an extensive invasion on development land. The proximity to water and other environmental factors can make a difference in what treatments can be used and therefore the cost. Treatments can also involve a combination of methods. 

 

Types of knotweed treatments and prices

A typical domestic residential property using a chemical treatment programme would cost in the region of £3,000 + VAT, while a small commercial site might cost £5,000 + VAT. Both would come with a 10-year insurance backed guarantee. 

Any work requiring use of mechanical methods, such as excavation and removal of infested soil and ground materials, can be prove more expensive than chemical treatment methods. Cost will be dependent on factors such as topography, geology, access to the site, and potential ecological restraints. Costs typically start from around £7,000 + VAT. This includes a 15-year guarantee. 

One factor which can impact on cost is whether the Japanese knotweed that is removed is able to be treated onsite or has to be disposed off-site. As the plant is classified as a controlled waste, it can only be disposed of at licensed landfill sites, and transportation can only be done by a licensed carrier to ensure that the plant is properly contained and does not spread.  

When all is considered the costs of Japanese knotweed removal may at first seem high, but compared to the potential damage that would be caused by doing nothing, then it really is a no-brainer. It also ensures that you would avoid any potential legal implications and costs should the knotweed have spread in future from your property to elsewhere. 

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Japanese knotweed is one of the toughest, most damaging and insidious plants in the world.

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