# Commission a useful tree risk assessment

Lesson 1 of [Manage tree risk across a property](https://arborists.fyi/academy/manage-property-tree-risk.md), 12 minutes.

A tree risk assessment should help you decide what to do about a tree in its setting. Purdue Extension explains risk as the combination of the likelihood of a failure event and the severity of its possible consequences. The same guidance states that trees cannot be maintained entirely free of risk. A buyer should therefore seek a reasoned assessment and management options rather than a promise that a tree is completely safe.

## Describe the targets

Purdue defines a target as people, property or activities that could be injured, damaged or disrupted by tree failure. Tell the assessor about entrances, occupied areas, parking, paths and activities around each tree. Explain how use changes, such as a normally quiet area being used for an event. These details help the professional consider consequences; they do not let the buyer calculate a risk rating without an assessment.

Do not assume that foliage alone answers a structural question. Purdue's inspection guidance discusses the crown, branches, trunk and root zone. Cracks, decay, broken branches, poor branch attachments and changes around the root plate can matter. Supply observations from safe positions and let the arborist decide what examination is needed. Avoid walking beneath damaged limbs to complete a checklist.

## Agree the assessment question

State whether you need advice about one damaged tree, a group around a busy area or a wider property care plan. Ask which trees and areas will be included and how the assessor will record findings. As suggested buyer prompts, request tree identifiers, observations, conclusions, limitations, recommended actions and follow-up. These prompts help communication; this course does not claim they form a mandatory report standard.

Ask the professional to explain any limits on what was examined and whether additional assessment is recommended. Keep observation separate from inference. A visible crack is an observation; its effect on potential failure and the best response require professional judgement. Do not convert a report limitation into either proof of safety or proof that removal is unavoidable.

## Compare management options

Purdue recommends considering options before removal. Depending on the assessment, these can include pruning, tree health care, changing site conditions, structural support or moving a target where possible. Ask why each option is or is not suitable for this tree and this setting. Moving a bench may change exposure, but it does not repair a defect or automatically resolve all risk.

Ask how urgently each recommendation should be addressed and what arrangements are needed while waiting. The guidance prioritises safety before tree health when scheduling work. Do not invent your own universal response deadline from a general article. Have the assessor explain priority and any immediate restrictions for the actual situation.

## Keep the decision with the evidence

File the assessment, your questions and the selected action together. Ask what risk remains after the recommended work and when another inspection should be arranged. Inspection frequency should reflect the site and professional advice; local duties and authority requirements must be checked locally. This course does not give a universal legal inspection interval.

The academy certificate is a certificate of completion from arborists.fyi. It is not a licence, accreditation or professional qualification to assess trees. Your useful skill as a buyer is to ask for clear evidence, understand the options and ensure that someone follows through on the agreed actions.

## Sources

- https://www.purdue.edu/fnr/extension/tree-risk-management-what-every-property-owner-needs-to-know/
- https://www.purdue.edu/fnr/extension/spring-storms-are-coming-how-to-reduce-tree-damage-and-risk/

Also on the [web page](https://arborists.fyi/academy/manage-property-tree-risk/commission-a-risk-assessment).