Building permits are required when: 

• Constructing, enlarging, altering, or demolishing a structure.
• Changing the use of a structure either within the same use group or to a different use
  group when the new use requires greater degrees of structural strength, fire protection, exit
  facilities, ventilation, or sanitary provisions.
• Installing or altering any equipment which is regulated by the Virginia Uniform Statewide Building
  Code (VUSBC).
• Removing or disturbing any asbestos or lead containing materials during demolition, alteration,
  renovation of or additions to structures.
• Moving a lot line which affects an existing structure’s continued compliance with the building regulations under which it was built.