The authority should ensure that the site required falls within its ownership and that rights of access are capable of being granted.
If third parties such as statutory undertakers have equipment on the site, depending on the design, the equipment may require to be removed or relocated, and this may cause delays or increase costs.
Third parties may have rights of access to or across the site. This can be a particular concern to the private sector in projects involving schools or prisons.
If the ground is contaminated, or contamination from adjacent properties is likely, there may be delays or additional costs may be incurred.
If the decision of a planning authority is called in or judicially reviewed, there may be additional costs and/or delays.