Speak to the Experts

Japanese Knotweed in Lancashire

  • Expert identification and removal of Japanese Knowteed
  • Legal services to protect your house and your home
  • Protect your properties value against devaluation
  • Our services are 100% free to homeowners across Lancashire

Japanese Knotweed
Devaluation of property

If an infestation of Japanese Knotweed is found on your property, the value of your house could decrease by 10% upwards.


Japanese Knotweed
Damage to your property

The roots of Japanese Knotweed are robust and strong, they can cause damage to concrete, roads, paving and also the foundations and underground pipework


Japanese Knotweed

If Japanese Knotweed is found on or around your property most UK mortgage lenders will refuse to give you a mortage or re-mortgage unless a treatment plan is in place.


Japanese Knotweed
Liability to your neighbours

If Japanese Knotweed spreads from your property to another one, the owner of that property could be entitled to damages from you Protect yourself today


Have you noticed an infestation of Japanese Knotweed on your property? Did you know that Japanese Knotweed can decrease the market value of your property by an average of 10% upwards, and also it should be noted that having Japanese  Knotweed on your property could cause problems such as:

  • Selling your property
  • Unable to re-mortgage your property
  • Not being able to get a mortgage
  • Get and obtain property insurance

Homeowners also need to be made aware that the presence of Japanese Knotweed on your property, or even in close proximity of your property borders if ignored can allow a potential claim against you which can run in to tens of thousands of pounds


Japanese Knotweed is an extremely aggressive invasive plant that can be found affecting properties across Lancashire and its boroughs.

Lancashire emerged as a major commercial and industrial region during the Industrial Revolution. Liverpool and Manchester grew into its largest cities, with economies built around the docks and the cotton mills respectively. These cities dominated global trade and the birth of modern industrial capitalism. The county contained several mill towns and the collieries of the Lancashire Coalfield. By the 1830s, approximately 85% of all cotton manufactured worldwide was processed in Lancashire. Accrington, Blackburn, Bolton, Burnley, Bury, Chorley, Colne, Darwen, Manchester, Nelson, Oldham, Preston, Rochdale and Wigan were major cotton mill towns during this time. Blackpool was a centre for tourism for the inhabitants of Lancashire’s mill towns, particularly during wakes week.

The thick, dense plant can overwhelm other vegetation nearby, grow through tarmac and brick, weaken the integrity of structures and is very difficult to kill. Homeowners across Lancashire have found difficulty selling houses or tending to gardens where Japanese Knotweed is present. Japanese Knotweed can also be found nationwide and often causes problems for homeowners, especially when encroaching from a neighbouring property. As a homeowner it’s important to understand your position when it comes to this difficult, invasive species. It is well known that many railway lines and council properties are infected with Japanese Knotweed and this spreads on to neighbouring properties.

The Japanese Knotweed Agency has a team of expert staff and surveyors across Lancashire and England and Wales on hand to help identify and exterminate the Japanese knotweed wherever it appears. Send in a photo and the team will begin processing your issue within 24 hours. The Japanese Knotweed Agency will be ready to provide a free no-obligation survey so you can find out whether you have an issue with Japanese Knotweed, and what options are available to you, without obligation.

The agency charges you no fees and will instead refer you to an accredited removal specialist who will provide you with their own quote for the removal. Japanese Knotweed Agency are also on hand to give you all the advice you need around legal matters related to the weed.


If you have any questions, please don’t hesitate to get in touch with one of our customer services staff. However, here are answers to a few of the most common questions we receive

Yes. Lancashire (abbreviated Lancs.) is a non-metropolitan and ceremonial county in North West England. The county’s administrative centre is Preston, while Lancaster is the county town. The borders of the administrative county were created by the Local Government Act 1972 (enacted 1974) and enclose a population of 1,449,300 and an area of 1,189 square miles (3,080 km2).

However, this is only a small portion of the extent of the historic county palatine, which includes the large cities of Manchester and Liverpool as well as the Furness and Cartmel peninsulas in the Lake District, and has an area of 1,909 square miles (4,940 km2). Many of these places still identify strongly with the county, particularly in areas of Greater Manchester (such as Oldham and Bury) where Lancashire is still used as part of the postal address. The population of Lancashire in the 1971 census (before local government changes) was 5,118,405, making it the most heavily populated county in the United Kingdom at the time (other than Greater London, which had only been created in 1965).

The history of Lancashire begins with its founding in the 12th century. In the Domesday Book of 1086, some of its lands were treated as part of Yorkshire. The land that lay between the Ribble and Mersey, Inter Ripam et Mersam, was included in the returns for Cheshire. When its boundaries were established, it bordered Cumberland, Westmorland, Yorkshire, and Cheshire.

Lancashire emerged as a major commercial and industrial region during the Industrial Revolution. Liverpool and Manchester grew into its largest cities, with economies built around the docks and the cotton mills respectively. These cities dominated global trade and the birth of modern industrial capitalism. The county contained several mill towns and the collieries of the Lancashire Coalfield. By the 1830s, approximately 85% of all cotton manufactured worldwide was processed in Lancashire. 

Accrington, Blackburn, Bolton, Burnley, Bury, Chorley, Colne, Darwen, Manchester, Nelson, Oldham, Preston, Rochdale and Wigan were major cotton mill towns during this time. Blackpool was a centre for tourism for the inhabitants of Lancashire’s mill towns, particularly during wakes week.

The historic county was subject to a significant boundary reform in 1974 which created the current ceremonial county and removed Liverpool and Manchester, and most of their surrounding conurbations to form the metropolitan and ceremonial counties of Merseyside and Greater Manchester. The detached northern part of Lancashire in the Lake District, including the Furness Peninsula and Cartmel, was merged with Cumberland and Westmorland to form Cumbria. Lancashire lost 709 square miles of land to other counties, about two fifths of its original area, although it did gain some land from the West Riding of Yorkshire.

Today the ceremonial county borders Cumbria to the north, Greater Manchester and Merseyside to the south, and North and West Yorkshire to the east; with a coastline on the Irish Sea to the west. The county palatine boundaries remain the same as those of the pre-1974 county with Lancaster serving as the county town, and the Duke of Lancaster (i.e. the Queen) exercising sovereignty rights, including the appointment of lords lieutenant in Greater Manchester and Merseyside.

Lancashire is just as likely as any other borough, town or city in the UK to be affected by Japanese Knotweed. It can stem from unkept parkland or woodland, waterways, commercial property or land, railway infrastructure and can be spread by a very small amount of the root’s weeds being spread from one place to another.

Japanese Knotweed can also lay dormant for up to 15 years, and disturbing these dormant roots through building work or renovations etc can easily wake the weed up and start it to spread again.

There is no place that Japanese Knotweed will not spread, and may be more prevalent nearer to green land and railway and waterway infrastructures. It is very important when buying a property to ensure your survey covers Japanese Knotweed and you obtain a Yes or No as to its presence. A ‘don’t know’ answer isn’t helpful. Form TA6 completed by the seller with information about the property is also a good indication and the seller should answer truthfully if they know that Japanese Knotweed is on or near or has been on or near the property. If a seller lies here, or the surveyor gets things wrong, and you later discover the presence of Japanese Knotweed, you would be able to litigate and potentially recover any losses in the property valuation and the costs of treatment and insurance backed guarantee.

You can check the Japanese Knotweed Agency National Register which might give you an indication where Japanese Knotweed has been sighted around Lancashire, but you should not rely on this and should always seek a specialist survey when buying a property.

Yes. Japanese Knotweed Agency have affiliations with the country’s leading treatment firms who are extremely professional and qualified in the treatment and/or removal of Japanese Knotweed, and cover all areas of Lancashire.

These affiliate firms all provide a nationally recognised solution and each treatment plan comes with an Insurance Backed Guarantee for 10 years to give you total peace of mind.

Some firms can also offer staged payments and some offer finance to help spread the cost.

Yes. Japanese Knotweed Agency have affiliations with law firms across Lancashire and across the UK, and these firms can assist homeowners who are based inside or outside Lancashire. These and more specialist panel law firms can offer services to anyone living across the UK, subject to review of the circumstances and those at fault for allowing the spread of Japanese Knotweed.

All our panel law firms offer a Contingency Fee Agreement, better known as No Win No Fee, so if they decide to represent you, there are no upfront costs to you at all, and never any costs if your claim is unsuccessful.

Japanese Knotweed Agency offer a national service and can help anyone around the UK. We cover all areas of Lancashire including Accrington, Adlington, Bacup, Barnoldswick, Blackburn, Blackpool, Brierfield, Burnley, Carnforth, Chorley, Clayton-le-Moors, Cleveleys, Clitheroe, Colne, Darwen, Earby, Fleetwood, Garstang, Great Harwood, Haslingden, Kirkham, Lancaster, Leyland, Longridge, Lytham St Annes, Manchester, Morecambe, Nelson, Ormskirk, Padiham, Penwortham, Poulton-le-Fylde, Preesall, Preston, Rawtenstall, Rishton, Skelmersdale, Wesham, Whitworth.

Anyone affected by Japanese Knotweed in these boroughs and cities can seek help from the Japanese Knotweed Agency.

Our services are 100% FREE. We never charge you for our services, whether it is identification of Japanese Knotweed, assisting with a treatment affiliate or helping survey and identify the cause and possible litigation by a panel law firm to protect your house value and force a third party to pay you compensation to cover your devaluation and also cover the costs of treatment and an Insurance Backed Guarantee.

Call us freephone 03335 777 888

Or use our enhanced enquiry form

Are you unable to find a particular question that needs answering? Check our Help Centre to see our vast database of questions and answers


We made getting in touch with us simple by using any of the methods shown below.


  • Freephone: 03335 777 888
  • Our Head Office
    Hexagon Tower
    M9 8GQ

  • Office Opening Hours

    • Monday – Friday: 9:00am till 5:00pm
    • Weekends: Closed (Email only)
    • Public Holidays: Closed (Email only)



Japanese Knotweed Agency will all ways strive to ensure all of our clients receive the best quality prices and services. We take great pride in everything that we do

    • Agree and consent to Japanese Knotweed Agency Terms & Conditions, Privacy Policy and Cookie Policy
    • Agree and consent to my information being processed by Japanese Knotweed Agency and it’s Partners to contact me via phone or email regarding information that is relevant to my enquiry.

    03335 777 888