Japanese Knotweed Removal Cost Breakdown

Japanese knotweed removal costs typically range from £1,000 for small herbicide treatments to over £200,000 for large commercial excavations.

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The final price depends on a range of factors including the size and severity of the infestation, the removal method required, and whether guarantees or long-term monitoring are included.
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Domestic Property Costs

For homeowners, removal typically ranges from £1,000 to £39,000, depending on the size of the affected area and whether excavation or herbicide treatment is most appropriate.
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Commercial Property Costs

On commercial sites, where infestations may be widespread or deeply rooted, costs can range from £1,000 to £200,000. In extremely severe cases, such as large development sites or infrastructure projects, the total cost may exceed £1 million.

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What’s Included in the Cost?

We don’t just offer a one-size-fits-all price. Each quote includes:

• A tailored removal plan suited to your property
• All labour, materials, and equipment
• Ongoing monitoring (if applicable)
• The option to include an insurance-backed guarantee (5, 10 or 35 years)

Japanese Knotweed Survey

Before removing Japanese knotweed, we conduct a full site survey. This allows our specialists to evaluate the infestation and advise you on the best removal method to ensure we eradicate your Japanese knotweed for good at the best possible price. If you aren’t sure if you have Japanese knotweed, use our free identification tool to get confirmation.
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Our Guarantees

We’re proud to offer insurance-backed guarantees of 5 or 10 years on all removal works, and we’re the first UK company to offer a 35-year guarantee, matching the length of a typical mortgage. These guarantees provide peace of mind to homeowners, buyers, lenders, and commercial stakeholders alike.