All residential structures and accessory buildings require a sealed as-built foundation survey by a land surveyor registered in North Carolina. They are to be available to the Town of Cary Inspector at the time of the foundation inspection for buildings with permanent foundations, and prior to scheduling any rough-in inspection for buildings without permanent foundations. This survey shall illustrate the locations of all structures under construction and existing structures, all property lines, building setback lines, buffers, and easements. 

The requirement for a survey shall not apply to the following:

1. Any building or structure that is five feet or more from any required setback line, buffer, or easement.
2. Any structures that do not require a building permit. Structures that do not require permits must still meet all other Town requirements, including zoning/setback requirements. Please contact the Planning and Development Services Department for more information.
3. Where there is an existing structure and an accurate survey already available, such that the Inspections and Permits Division can determine the field location of existing and proposed structures without requiring a new survey,

Reference: Land Development Ordinance Section 3.14.2, and refer specifically to Section (D).