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Compare UK Japanese Knotweed Removal Quotes

Tell us about the infestation and we'll match you with up to 3 vetted, PCA-accredited specialists near you — each with insurance-backed guarantees. No obligation, no cost.

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IBG

insurance-backed

UK-wide

specialist network

24 hrs

typical response

Established stand of Japanese knotweed with tall bamboo-like green stems growing along the boundary of a British house and garden

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✓PCA-accredited specialists • ✓Insurance-backed guarantees • ✓RICS-recognised reports • ✓100% free & independent

Japanese knotweed pushing up through cracked paving beside a house

The Knotweed Problem

Left untreated, knotweed spreads fast — and costs you

In short

Japanese knotweed can grow up to 10cm a day, push through tarmac and foundations, and stall a mortgage or house sale. It rarely dies without professional treatment — and DIY attempts often make it worse.

Structural damage — rhizomes exploit cracks in walls, drains, patios and foundations.
Mortgage & sale risk — lenders can refuse without a management plan.
Legal duty — you must not allow it to spread to neighbouring land.

How To Identify It

6 tell-tale signs of Japanese knotweed

Not sure what you're looking at? Compare against these. If it matches, get quotes before it spreads.

Hollow bamboo-like knotweed stems with purple speckles

Bamboo-like stems

Hollow, green stems flecked with purple — grow up to 3m by summer.

Heart-shaped leaves

Bright green, shield or heart shaped, up to 14cm across.

Knotweed stem showing zig-zag growth pattern

Zig-zag stems

Leaves alternate along the stem in a distinctive zig-zag.

Creamy-white knotweed flower sprays in late summer

White flowers (Aug–Sep)

Sprays of tiny creamy-white flowers in late summer.

Red and purple knotweed spring shoots emerging from soil

Red spring shoots

Red-purple asparagus-like shoots push up in early spring.

Growing through hard surfaces

Pushing up through tarmac, patios or beside foundations.

Think it's knotweed? Get free quotes →

Real Results

Before & after professional treatment

From swamped to sorted — the specialists we match you with restore gardens, boundaries and property value.

Overgrown knotweed garden before treatment, cleared restored garden after — Garden clearance

Knotweed swamping a boundary before, clean fenced boundary after — Boundary treatment

Knotweed against house foundations before, clear protected wall after — Foundations protected

Why Treat It Now

Every season you wait, it gets harder — and pricier

Protect property value

A live infestation can knock thousands off your home. Treatment restores confidence.

Satisfy lenders

An insurance-backed management plan is what mortgage lenders want to see.

Stay within the law

Allowing spread to neighbouring land can lead to claims. Treat to remove the risk.

Stop structural damage

Catching it early means herbicide, not a costly full excavation later.

How It Works

From survey to sorted in 3 simple steps

Tell us about it

Answer a few quick questions — the problem, the area size and your postcode. Takes under a minute.

Specialists survey & quote

Up to 3 vetted, PCA-accredited local firms assess your site and send tailored quotes.

Treat & guarantee

Choose your specialist. Work comes with an insurance-backed guarantee lenders accept.

Start step 1 now →

Treatment Cost Guide

How much does knotweed removal cost?

In short

Most UK homeowners pay £2,500–£5,000 for a herbicide programme and £5,000–£15,000+ for full excavation. Final price depends on area size, access and method — comparing 3 quotes typically saves 20–40%.

Survey & plan

from £150

Identification, report & management plan for a sale or mortgage.

Most common

Herbicide programme

£2.5k–£5k

Multi-visit treatment over 2–3 seasons with a guarantee. Best value for most gardens.

Excavation

£5k–£15k+

Dig out & remove rhizome — fastest result, ideal when building or selling now.

Large / commercial

POA

Development sites & 20m²+ infestations — combined methods, priced per site.

Guide prices only — your final quote depends on site size, access and chosen method.

Treatment Methods

Which removal method is right for you?

Method	Timescale	Disruption	Guarantee	Best for
Herbicide programme	2–3 seasons	Low	5–10 yr IBG	Most gardens, best value
Excavation & removal	Days	High	10 yr IBG	Selling/building now
Cell burial	Days	Medium	10 yr IBG	Large sites, on-site disposal
On-site relocation	1–2 seasons	Medium	Site-specific	Development land

Herbicide-certified applicators Insurance-backed guarantees Waste-carrier licensed

Areas We Cover

Vetted knotweed specialists across the UK

Knotweed is most common in South Wales, the South West, London and old industrial or railway land — but we cover the whole country. Find your town:

Cardiff Swansea Bristol London Manchester Birmingham Plymouth Exeter Newport Liverpool Leeds Nottingham

See all areas we cover →

Map of Japanese knotweed prevalence across the UK — heaviest in Bristol and the South West, South Wales, the North West and London

Common Questions

Japanese knotweed FAQs

How many quotes will I get?+

Up to three, from vetted, PCA-accredited specialists who cover your area — so you can compare price, method and guarantee before deciding.

Can I get rid of Japanese knotweed myself?+

DIY rarely works and can make things worse — cutting or digging spreads rhizome fragments, and disposal is legally controlled. A PCA-accredited specialist with an insurance-backed guarantee is what lenders accept.

Will knotweed stop me getting a mortgage?+

Not necessarily. Most lenders will proceed with a professional management plan and an insurance-backed guarantee in place. That's exactly what the specialists we match you with provide.

How long does treatment take?+

A herbicide programme typically runs over 2–3 growing seasons. Excavation is far quicker — often a few days — but costs more. Your specialist recommends the right approach for your site and timeline.

Is this service really free?+

Yes — completely free and no obligation. We're an independent comparison service. You tell us about the problem, we match you with up to 3 vetted specialists, and you choose whether to proceed.

Get up to 3 free knotweed quotes today

One short form. PCA-accredited specialists. No cost, no obligation.

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