Collect the inputs that are useful before a technical discussion: number of people, target autonomy, possible placement and the systems you want to discuss. The planner does not choose structural or protection parameters for you.
This planner does not determine structural dimensions, construction depth or a protection class. Those decisions require project-specific technical review after the site and source data are understood.
Enter the number of people to build a family shelter brief.
The shared Project Passport receives the private-home facility type, capacity range, private-bunker direction and only an unambiguous placement value. Autonomy and requested features remain in project notes.
A real private shelter project needs a review of the property, source data, access for works, utilities, ground and water conditions where relevant, and the appropriate project requirements. The online planner is a structured starting brief, not a design conclusion.