The detailed design will require a decision to identify a preference for one design concept and this stage in the process will refine and develop this. Detailed analysis of the technical and logistical requirements of the site will need to be considered and finalised.
Issues such as the choice of construction materials will also have important implications in terms of noise, odour and visual impacts. If it has not already happened this will be the point at which plans for the site will be published as part of the consultation process prior to the planning application. If the project involves a large structure there is likely to be considerable local interest and it may be worthwhile employing a communications/PR consultancy or manager to carry out the engagement process.
Once a design solution for a site has been arrived at this should be reviewed by the project team to ensure that the original design objectives have been achieved.
At this stage it may be beneficial to obtain expert advice from external sources. The Commission for Architecture and the Built Environment (CABE) is a government-funded, national organisation with a remit to champion high standards of design in the built environment in England. Similar organisations with comparable objectives also exist in Wales and Scotland (Design Commission for Wales and the Royal Fine Art Commission for Scotland).
For major projects CABE offer a design review service which provides expert advice on the design of schemes in England that may have a significant impact on their environment. It reviews schemes which are significant because of their size, use, site, impact on local planning policy or potential to set a precedent. CABE encourages consultation at the earliest possible opportunity, ideally before a planning application has been submitted. Advice given before the planning application is submitted is confidential. For further information refer to the CABE website.