Site assessments

Japanese knotweed inspections and surveys

Clear site information for the decisions ahead.

Panoramic aerial view of vegetation and surrounding land

Compare your options

Survey or inspection

Start with the decision you need to make. An inspection is an on-site check of what is visible. A survey is a fuller assessment with an agreed report. Free identification and advice from photographs can help establish which is the useful next step.

Site inspection

From £200

We check the accessible area for visible signs and discuss the site with you. An inspection can include a letter recording whether knotweed was found or not found during the visit. Agree the area and purpose before booking.

A useful starting point when you need an on-site opinion or an inspection before a quotation for a ten-year plan, barrier membranes or excavation.

An inspection can give you peace of mind before a house sale by recording whether any visible knotweed was found in the areas checked.

Site survey

From £300

A fuller assessment records visible invasive growth, its location and relevant site constraints, with a report agreed for your purpose.

Your survey report includes a precise site map showing the location and extent of each knotweed stand identified during the visit. It also includes risk assessments using the applicable RICS and Property Care Association (PCA) guidance.

Aerial photography and mapping

Drone surveys and geolocation

Ground-level photographs show the detail of a plant or patch. Aerial photography can add the wider picture: the relationship between affected areas, boundaries, access routes and surrounding land. On suitable sites it can help a team understand the overall layout without relying on isolated close-up photographs.

When drone surveying and geolocation are included, we record the GPS coordinates of each identified knotweed stand. Discuss the areas you need to locate and the information you want to retain so we can agree suitable imaging and outputs for your site.

These options are considered with the purpose of the survey, access and site conditions. Drone photography and geolocation are not automatically included in every survey price; we agree the scope before booking.

Before you book

Arrange an assessment

Send the site address or postcode, clear photographs of the leaves, stems and wider area, and any existing reports. Tell us about access, nearby water and any sale or construction deadline. If someone has requested a particular document, send that requirement too.

We will discuss whether an inspection or survey fits your needs and agree the area and report scope. Deposits are required before booking; the agreed work, price and deposit are confirmed before you commit.

Ask about an inspection or survey