19/11/2025
At Viking Surveyors, we always report Japanese Knotweed when we see it, it is worth noting that the guidance provided by the RICS is that surveyors are not under any obligation to provide advice on the presence of or the management of such plants. On of our surveyors spotted this patch of knotweed during an inspection earlier this year.
However, it’s important to understand the facts — not the myths.
The effects of Japanese Knotweed have been greatly exaggerated in the media and by lenders over the years. While it can spread and cause localised structural damage, it’s nowhere near as destructive as it’s often portrayed.
In fact, plants such as Buddleia, which aren’t classed as invasive, can cause significantly worse damage in many situations.
The good news is that lender attitudes and surveyor guidance have softened in recent years.
If knotweed is suspected or known to be a problem in your area, the right approach is to commission a suitably qualified horticultural specialist to confirm identification and prepare a management plan if needed.
It’s also important to remember that knotweed may not be visible during winter months and can easily be cut back before inspection — so if the property is in an affected area, a horticultural inspection remains essential.
We also recommend asking your legal advisor to check whether knotweed has ever been reported locally before you proceed with your purchase.
At Viking Surveyors, we believe in balanced, evidence-based reporting — giving you the facts, not the fear.
