Japanese Knotweed – Difference between a Building Survey & a Knotweed Survey

RICS building surveyors are not expected to be fully trained in the management and treatment of Japanese Knotweed, however many RICS building surveyors do receive training often under CPD so that they have the ability to identify Japanese Knotweed at any time of the year. The RICS building surveyors also have the RICS information paper and the RICS Japanese Knotweed risk table to help them identify the real of risk the knotweed presents to the property. This will take into account the some of the concerns of the lenders and insurance companies. Bear in mind that if a RICS building surveyor fails to identify Japanese Knotweed on or near the property then the buyer may be able to make a claim for negligence against the surveyor. Building Surveys or house surveys as they are normally called gives you an overview of the property’s condition and point out defects and subsidence. One of the major issues with a property’s garden is the presence of Japanese Knotweed. Building surveyors have a duty of care to their clients and any loss incurred by the client due the to the surveyor’s negligence may lead to the client having a claim against the surveyor.

Despite the fact that building surveyors have a duty of care to the client and are expected to identify Japanese Knotweed, not all surveyors are trained to do so. This leads to the risk of not identifying the Knotweed before the purchase of the property and then afterwards potentially having to make legal claims against the surveyor after Japanese Knotweed is found present on the property. When purchasing property it is wise to arrange a Japanese knotweed survey along with a normal building survey so that you can be sure whether Japanese knotweed is present on the property. If Japanese knotweed is present then the buyer can re-negotiate the value of the property or ask the seller to have a Japanese Knotweed Management Plan (KMP) in place or get rid of the knotweed completely.

A Japanese knotweed survey will identify whether Japanese knotweed (or other non-native invasive plant) is present or nearby. The survey findings and site plan accurately record the location and area of knotweed contamination and the level of risk it presents to the property in accordance to the RICS knotweed risk table.  If the property is damaged by Japanese Knotweed then this will also be recorded and photographs are taken. Unlike a normal building survey where Japanese knotweed is noted if identified, a specialist knotweed survey goes into great detail about the extent of the knotweed infestation, the level of risk, the most appropriate treatment option and remedial work and the likely cost of carrying this out.

Where applicable, the knotweed survey will provide information and advice to help with cases of encroachment, misrepresentation regarding the Law Society Property Information TA6 Form (3rd Edition) or professional negligence claims.

 

Alex Evans

You May Also Enjoy

Letting Agent Talk

29 is the age house sharing becomes ‘embarrassing’

but 11% still do it, according to new Nationwide research That equates to 27 million admitting they have felt embarrassed about their living situation With 69% saying living alone is unaffordable, it’s no surprise the average age of those in house shares is 35 From moving home (12%) to living with an ex (10%), as…
Read More
Estate Agent Talk

1 in 5 London Homes Listed in Last 30 Days

The latest research from London lettings and estate agent, Benham and Reeves, reveals that one in five homes currently for sale in London have been added to the market within the last 30 days, as sellers respond to strong buyer demand. Demand for London homes is strong Benham and Reeves has analysed current residential property…
Read More
Commercial Agent Talk

Biggest block management headaches revealed

The latest insight from property management specialist, Rushbrook & Rathbone, has found that utilities, cleaning and gardening are the most common block management requirements, accounting for almost two thirds of all call-outs and maintenance tasks carried out in 2025. Rushbrook & Rathbone’s internal data shines a light on what most frequently drives costs when it…
Read More
Home and Living

Invasive plants could be damaging your property

What every homeowner needs to know. Invasive plants growing in your garden could be causing serious and costly damage to your property without your realising. Some species can undermine foundations, cracking patios and driveways, and spreading rapidly beyond your boundaries, potentially leading to disputes with neighbours. The financial impact can be significant. Left untreated, these…
Read More
Rightmove logo
Breaking News

Rents stand still at start of the year for the first time since 2017

The average advertised rent of homes outside of London remains flat (0.0%) at £1,370 per calendar month, the first time since 2017 that there has been no rise from Q4 to Q1: Average advertised rents in London rose by 0.7% this quarter to £2,736pcm Average rents outside of London are still 1.6% higher than this time last year, though this is the lowest this figure has been since 2018…
Read More
Breaking News

London estate agents represent best value added

The latest research from AgentWise, the agent community helping to support estate agents through global collaboration and market insight, has found that London estate agents represent the best value added during the transaction process when compared to many other global property hotspots, with the average commission earned per property sitting well below other major global…
Read More