A pest can be seen in a single room while relevant evidence lies elsewhere, or an isolated concern may remain limited after inspection. Neither possibility should be assumed in advance. For a Hampton Wick property, describe the first sign and every subsequent observation by location. Mention adjoining storage or shared services that may need consideration, but distinguish those features from places where you have actually found evidence. This helps define a sensible starting scope.
The inspection should be clear about what was accessible. A closed cupboard, an occupied room without permission or a concealed void can leave unanswered questions. Ask whether that limitation affects the proposed treatment or simply needs to be recorded for later review. There is a meaningful difference between an area checked with no relevant signs and an area not examined. Understanding that difference helps you assess both the recommendation and any additional access request.
Before agreeing work, ask why each room or feature is included and what would lead to the scope changing. The answer should connect to identification, observed signs and the method proposed. Preparation can then be targeted to the agreed areas, with instructions for belongings, cleaning and follow-up. If new evidence appears somewhere else, report it specifically so it can be assessed as a change in the information rather than automatically treated as proof that the original conclusion was wrong.