Detailed design seeks to refine or alter the approved concept to address any local authority conditions of consent and to further resolve design issues and specific details.  This may involve preliminary cost estimations and budgeting.
Construction documents provide further information to address construction processes and techniques, provide specifications for materials and workmanship and provide details for custom-designed elements so that they can be built.  They can also include preparation of general conditions of contract and detailed specification reports.  These drawings and documents are suitable for assessment by a principal certifying authority, for tendering and/or for construction.

Some recent or significant examples include: