Both Duncombe School and Treetops Pre-School are inspected by the Independent Schools Inspectorate (ISI). This involves a compliance inspection every 2-3 years and a full educational quality inspection between 3-6 years.
In June 2022, Duncombe School and Treetop Pre-School received a full compliance inspection and an educational quality inspection. Both areas of the school were judged to be both fully compliant and excellent in all areas.
The full report can be downloaded below. P4-7 contains details of compliance, in which the school is judged to have met all standards. P8-13 contains details of educational quality, in which the school is described as excellent in all areas.