This unit of competency specifies the outcomes required to audit residential class 1 and 10 buildings and structures against current requirements of the Building Code of Australia (BCA) and local planning policies. These class 1 and 10 buildings and structures are as defined in the BCA and up to three storeys and not more than 2000 square metres in floor area.The unit supports the work of private and municipal building surveyors providing advisory code-consulting services, who carry out building surveying audits and advise on building compliance. The unit supports the conduct of residential building surveying audits required as part of a sales process to inform planned works, including demolishing existing structures, or to inform planned upgrades to existing buildings.Licensing, legislative, regulatory or certification requirements apply to this unit in some States. Relevant state and territory regulatory authorities should be consulted to confirm those requirements.