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

Estate Agent Talk

Four to five houses is the sweet spot for first-time buyers

House hunting before the stress kicks in Just 20% of us feel excited on a first property viewing, rising to 47% by viewings 4 to 5 There’s a U shape trajectory of excitement when it comes to the viewing process However, there is a gradual rise in stress levels the more properties viewed Overall just…
Read More
Estate Agents should not all look the same
Letting Agent Talk

Opinion: Why Letting Agents Are The Cape-Wearing Heroes Landlords Need 

By Sally Lawson | Agent Rainmaker Let’s be honest – no landlords signed up to become compliance officers, legal experts, or legislative gurus. They signed up to invest in property. And yet, the weight of the regulatory obligation that’s landed on their shoulders has never been heavier.  And that’s even before the Renters’ Rights Act…
Read More
Letting Agent Talk

Void periods ease following RRA implementation, but remain higher than a year ago

The latest analysis by property management specialist, Rushbrook & Rathbone, has found that average rental void periods across England have eased since the implementation of the Renters’ Rights Act (RRA) in May, suggesting that landlords are beginning to adapt to the new legislative landscape. The firm believes many are using this period of change as…
Read More
Estate Agent Talk

76% of Poor Conveyancing Experiences Feature Communication Issues

Konnect You analysis finds that communication issues feature in more than three in four poor conveyancing experiences, with missing updates, slow responses and repeated chasing emerging as common frustrations. Communication problems, including limited updates, delayed responses and repeated chasing, featured in 76% of poor home-mover conveyancing experiences analysed by Konnect You. The findings suggest communication is a major factor in how home movers experience delays.…
Read More
Breaking News

1 in 8 new-build homes unsold after six months

Developers hold their nerve as one in eight new-build homes remain unsold after six months   Jonathan Samuels, CEO of specialist lender, Octane Capital, believes that developers are increasingly prioritising profitability over speed of sale, with new-build homes spending longer on the market as developers resist unnecessary price reductions and instead look to protect scheme…
Read More
Breaking News

Rental price and average salary tracker – July 2026

Year-on-year Rental Price Growth Moderates, Yet High Demand and Limited Supply Continue to Push Rents Higher London recorded the strongest monthly rental growth, with average rents rising from £2,385 to £2,484 (+4.2% month-on-month). As a result, the representative annual salary needed to secure the average-priced rental home increased from £70,050 to £74,520 (+6.4% year-on-year). The…
Read More