Professional Japanese Knotweed Surveyors
Japanese Knotweed Survey Services
Professional Japanese knotweed surveys for homeowners, buyers, sellers, developers and property professionals.
A professional Japanese knotweed survey confirms whether a property is affected by Japanese knotweed and assesses the level of risk it may pose.
Knotweed Doctor provides formal identification, risk assessment and clear reporting to support property sales, mortgage lender enquiries, solicitor due diligence and development planning.
Need a Japanese Knotweed Survey?
Call 0800 020 9171
info@knotweeddoctor.co.uk
Contact Us
Professional Japanese Knotweed Survey Services
A Japanese knotweed survey provides formal Japanese knotweed identification of whether a property is affected by Japanese knotweed, together with an assessment of the risks it may pose. This is often required when buying or selling property, dealing with mortgage lender enquiries, or assessing land for development.
Our survey reports are designed to provide clear, practical information so homeowners, buyers, solicitors, lenders and developers can make informed decisions with confidence.
Survey Options
Residential Knotweed Survey
Ideal for homeowners, buyers, sellers and property transactions where formal confirmation of the presence or absence of Japanese knotweed is needed.
- Formal identification of Japanese knotweed on a property
- Assessment of the risks posed to boundaries and built structures
- RICS Japanese knotweed risk categorisation
- Suitable support for mortgage lender and solicitor enquiries
- Required where an insurance backed guarantee is to be offered
Commercial & Construction Knotweed Survey
Full site surveys for commercial landowners, developers and construction projects where the extent of an infestation and its implications for planned works need to be understood clearly.
- Full site surveys to establish the extent of knotweed
- Assessment against proposed development plans
- Practical management planning for project constraints and resources
- Support for planning, remediation and programme decisions
Japanese Knotweed Survey Costs
Typical survey costs are:
- Residential knotweed survey: from £195
- Commercial or development survey: from £250
Most survey enquiries are answered the same day.
In some cases, if Japanese knotweed is identified and a treatment plan is agreed, the survey cost may be deducted from the treatment programme.
Every property and site is different, so please contact us if you would like confirmation of pricing for your specific location or project.
Not sure if you need a survey? Send us a photo or a quick description of the plant and we’ll happily advise whether a survey is necessary.
Do I Need a Japanese Knotweed Survey?
When a survey is usually needed
A survey is often needed when Japanese knotweed is suspected within or close to a property boundary, when land is being bought or sold, when a lender or solicitor requests more information, or when a development site needs proper assessment.
What the survey includes
The survey typically includes formal knotweed identification, technical investigation, accurate recording of the affected area, assessment of the risks posed, recommended actions and clear pricing where management or removal is advised.
Qualified reporting
Reports should be prepared by a suitably qualified person. Knotweed Doctor uses PCA certified surveyors with CSJK qualifications to ensure the survey is carried out professionally.
Property transactions
A professional survey helps buyers, sellers, lenders and solicitors understand the real position of the property and decide on the most appropriate next steps.
The Royal Institution of Chartered Surveyors (RICS) provides guidance on how Japanese knotweed should be assessed during property surveys. The chart above summarises the typical risk categories used when evaluating knotweed near a property.
RICS Japanese Knotweed Risk Categories
The Royal Institution of Chartered Surveyors (RICS) has published risk categories to help explain the level of risk Japanese knotweed may pose to a property. In broad terms, the assessment considers the proximity of knotweed to habitable areas and boundaries, together with any relevant evidence of impact.
Understanding the likely risk category can help clarify how the issue may be viewed during a property transaction and what level of management or further action may be appropriate.
Japanese Knotweed Survey FAQs
How much does a Japanese knotweed survey cost?
Residential surveys typically cost £195, while commercial and development surveys usually cost £250 depending on site size and location.
Do mortgage lenders require a knotweed survey?
Some lenders request a professional survey if Japanese knotweed is suspected near a property so they can understand the risk and any management requirements.
Who can carry out a knotweed survey?
Surveys should be carried out by a suitably qualified specialist such as a PCA certified surveyor with CSJK accreditation.
Professional Standards & Accreditation
Related Knotweed Pages
Local Survey Coverage
Book a Japanese Knotweed Survey
If you need formal knotweed identification, a property transaction survey, or professional advice on the risks posed by suspected Japanese knotweed, we are here to help.
Call: 0800 020 9171
Email: info@knotweeddoctor.co.uk