During the viewing the garden is in the sun. You already imagine the breakfast table there. For a decision about the plot this impression is valuable, as long as you do not confuse it with a verified statement about the whole year. Good preparation turns the pleasant moment into a concrete question for the planning.
What you actually observed
Record the date, approximate time, location and the visible situation. Describe the area you are concerned about: a seating area, a planned workspace or an access. “Sunny plot” as a personal note is much less helpful than a traceable reference to a specific place.
These notes are a method of editorial observation. They do not constitute a calculation of the sun’s course and they are not a construction or neighbour-law assurance. From a single photo it is also not apparent whether the depicted situation fits every planned time of use.
Lay your housing wish alongside
Formulate why light or shade is important to you. Perhaps you would like to sit outside in the morning, while another person uses a workspace in the afternoon. It is then not about as much sun as possible everywhere, but about different requirements for particular places and times.
Pass these requirements together with your observations on to the specialist planning. Ask how they should be investigated for the specific plot and the planned building. Distinguish the existing surroundings from assumptions about future development or planting. An unknown later development will not be treated as a reliable baseline.
Prepare a decision using an example
In the fictitious project the family like a sunny part of the garden and a proposed floor plan. In conversation it becomes clear that the desired seating area is located somewhere other than the area observed. The family therefore asks the planners for a targeted investigation of this use, instead of inferring the whole design from the viewing impression.
The result is kept together with the assumptions used. It can trigger a changed arrangement of rooms or a new question regarding the design of the outdoor space. The first impression remains as an observation, but does not decide on the plot on its own.
Do not take an illustration as a commitment
Visualisations for a purchase offer or your own design should make their actual status clear. A self-generated sunny garden view is not evidence of the light conditions of the plot offered. Likewise, an attractive shadow cast in an illustration does not replace a professional assessment.
This article helps to bring personal use and planning questions together. It does not assess lighting regulations nor specific shading or rights against neighbouring plots. Such questions must be clarified with the appropriate specialists and responsible authorities for the specific case.