Having worked within estate agency since 2001, I remember when knotweed was talked about and even then, due to the fact that treatments were still not as successful, it was generally thought that you wouldn't get a mortgage if the plot had knotweed which naturally would make people shy away from these properties.
The same cannot be said for today however. Whilst knotweed is still as invasive as it ever was, the treatments plans now on offer have been refined and are often based on years of research and practical experience. Today, many licensed professionals and firms specialise in knotweed treatment, offering comprehensive plans that comply with environmental regulations. These plans and methods of eradicating new growth have proven far more effective and subsequently many mortgage lenders will lend on a property so long as there is proof of a professional treatment prevention plan in place. That in itself should be that much more reassuring as ultimately, if the banks had concerns over protecting their asset, they simply would loan the finance.
That being said, you will need to do your due diligence and check that any knotweed has a comprehensive plan in place and so it is important to ask the selling agent of any home that you are considering purchasing, to have a copy of the report so that you can make an informed decision about whether or not you pursue the property. If the owners haven't got anything to hide, they should offer this up quite freely. The reports will likely provide reassurance assuming that the treatment plan has been undertaken by a reputable company after reviewing the site as to the best means of dealing with the infestation.
For me, gone are the days when I would rule out a property just because of the site having knotweed. I would certainly ask more questions and would want to know that the site is under a treatment plan but I wouldn't walk away from a property just because of scaremongering when in reality, in 2025, there are so many established specialists that can now deal with this successfully.
Frances Hunt - Mockford & Hunt
A few pointers to bare in mind:
When buying a home with a knotweed treatment plan in place, you can often be given reassurances, provided you take certain steps to ensure due diligence:
- Professional Management: A verified treatment plan, executed by a licensed and experienced specialist, can ensure that the knotweed is being managed effectively. Ask to see the report to verify the credentials and reviews of the treatment provider.
- Documented Treatment History: A comprehensive treatment plan should include documentation of past treatments, monitoring results, and future maintenance schedules. Ask to review this documentation to understand the extent and success of the treatment.
- Guaranteed Outcomes: Some treatment plans may come with guarantees or warranties for a specified period, assuring you that if the knotweed returns, the treatment company will address it at no additional cost.
- Regular Monitoring: Ongoing monitoring and maintenance are critical components of effective knotweed management. Knowing that there will be follow-up assessments can provide reassurance that the situation is being actively managed.
- Assessments from Specialists: You can request that an independent specialist conduct their own assessment of the knotweed treatment plan and its effectiveness. This should provide you with an additional layer of comfort and confidence.
- Impact on Property Value: Properly managed knotweed may not significantly affect property value. Many lenders and insurers now have policies in place regarding properties with knotweed treatment plans, making financing more feasible.
- Knowledge of Legal Obligations: You can be assured that sellers are legally obligated to disclose any known issues, including knotweed. A transparent history can reduce the risk of hidden issues.
- Home Insurance: You can inquire about how the treatment plan may affect home insurance policies. Many insurers provide coverage for properties with an active treatment plan. For an idea on coverage, ask your agent who the current sellers home insurance is with for a good idea of who would provide cover.
By actively seeking information, verifying treatment plans, and engaging professionals in the process, you as a buyer can feel more confident when considering a property with a knotweed treatment plan in place meaning you may not have to let go of that dream home after all. If you have any questions relating to this topic, feel free to reach out on enquiries@mockfordandhunt.co.uk
