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Japanese Knotweed

Japanese Knotweed (Fallopia japonica) is an invasive plant species originally from East Asia. It was introduced to the UK in the 19th century as an ornamental plant but has since become notorious for its aggressive growth.

It thrives in diverse environments and is often found along roadsides, riverbanks, and residential areas, where it can cause significant structural and ecological problems.

How to identify
Japanese Knotweed?

Recognising Japanese Knotweed early is critical to controlling its spread. Here’s how to identify it during different seasons:

Spring and Summer

Leaves: Broad, shield-shaped leaves with pointed tips, arranged alternately along the stem.
Stems: Bamboo-like, green with purple speckles, growing up to 2-3 meters tall.
Flowers: Creamy-white clusters that bloom in late summer.

Autumn and Winter

Stems: Brown, brittle, and resemble dead bamboo.
Rhizomes: Thick underground roots with an orange core capable of regenerating the plant.

Why is Japanese Knotweed Bad?

Japanese Knotweed is a threat to both ecosystems and properties due to its invasive nature.

Structural Damage

Its robust rhizomes can infiltrate foundations, walls, and drains, resulting in costly repairs.

Environmental Impact

It displaces native species, disrupts ecosystems, and accelerates soil erosion.

Property Value

Properties affected by this plant may see a reduction in value and difficulties securing mortgages.

Legal Implications

In the UK, allowing its spread to neighbouring properties can result in legal disputes under the Anti-social Behaviour, Crime and Policing Act 2014.

Cost of Removal

The cost of eradication depends on the infestation's severity, property size, and chosen method.Professional removal ensures compliance with legal requirements and reduces the risk of regrowth.

£1k - £3k

Herbicide Treatment

for treatments over multiple seasons.

£5k - £20k

Excavation and Removal

for severe cases involving physical removal of plants and soil.

Insurance Backed Guarantees

Often required by lenders and can add to the cost.

Risks of Buying a House with Japanese Knotweed

Purchasing a home with undisclosed Japanese Knotweed can have serious implications. Understanding this issue before purchasing is essential.

Repair Costs

Removal and structural repairs can be expensive.

Mortgage Issues

Some lenders may refuse financing or demand a treatment plan.

Legal Risks

If it spreads to neighbouring properties, you could face legal action.

Loss of Value

Unmanaged infestations can significantly reduce property resale value.

Benefits of Having a Home Survey

We understand that buying a home is one of the biggest investments you'll make. That’s why our expert home surveys give you the confidence to move forward by uncovering hidden issues, ensuring you’re not overpaying, and helping you secure your mortgage with ease.

Early Detection

Identifies the presence of any potential issues before purchase.

Peace of Mind

Provides clarity on what you’re buying and potential risks

Cost Savings

Enables negotiation with the seller or inclusion of a treatment plan

Financial Protection

Prevents future expenses linked to legal disputes or repair costs.