1. Simple - Straightforward design with clean geometry, Minimal detailing, Basic materials and finishes, Few or no custom elements, Examples: Small house extension, boxy new build, garden office.

2. Moderate - More intricate massing or varied forms, Mix of materials and detailing, Custom features like staircases or built-ins, Examples: Full house design, detailed renovation and/or extension.

3. Complex - Unique or irregular geometry, High level of detail in finishes and joinery, Multiple spaces with different styles, Several views, animations, or walkthroughs, May include landscaping, context buildings, or phasing, Examples: Architecturally ambitious house, conservation or retrofit projects.