What are the two types of planning permissions commonly required?

The correct answer identifies the two primary types of planning permissions as outline and detailed planning permissions. Outline planning permission is typically sought to establish whether a proposed development is acceptable in principle before detailed permission is applied for. This type of permission addresses key issues such as land use and the general scale of development but does not cover the finer details.

Once outline permission is granted, detailed planning permission is needed, which involves a comprehensive application that provides specifics on aspects like design, layout, and materials. This two-tiered approach allows local authorities to assess the potential impact of a proposal and ensures that developments align with local planning policies and community needs.

Other options, while they may reflect different facets or conditions of planning permissions, do not establish the foundational classifications that outline and detailed permissions provide in the context of planning law and practice.