Japanese Knotweed Mortgage | TP Knotweed Solutions

Japanese Knotweed & How It Can Affect Your Mortgage

The presence of Japanese knotweed will most likely affect the valuation of your property. Mortgage lenders often require evidence of a suitable treatment programme as a condition of lending if Japanese knotweed is present on or near to a property. A 10 Year Insurance Backed Guarantee must also be in place upon completion.

TP Knotweed Solutions are industry leaders and accredited specialists helping to resolve issues with knotweed on a daily basis. We offer a range of treatment options for Japanese knotweed, from in-situ herbicide treatment to complete removal of the plant and disposal to a licensed landfill. The options that our surveyors recommend will vary depending on your particular circumstances however all of our treatment plans are tailor-made to suit each individual Japanese knotweed case.

Lenders will handle cases of Japanese knotweed differently according to their particular guidelines. Every lender is different. Here are the stances of some of the UK’s biggest lenders on Japanese knotweed mortgages.

What do Mortgage Lenders generally like to see:

Comprehensive Japanese knotweed survey detailing the full extent of the problem.

5 Year Herbicide Treatment Programme or Complete Excavation and off site licensed disposal

A 10 Year Insurance backed Guarantee upon completion

Does your property have Japanese knotweed?

What is your mortgage lender saying?


Barclays demands an expert site assessment, and will not offer a mortgage until the knotweed has been treated.


Nationwide Building Society says: “If knotweed is prominent less than seven metres from the house we request a specialist report about eradication before deciding whether we can lend. Even if further away we require written confirmation from the borrower they are happy to proceed with a mortgage application despite presence of the plant.”


Santander expects professional knotweed treatment before lending homeowners money. It also expects you to keep money aside for future treatments in order to keep the garden clear.

Call today to speak to our friendly team.