Initial Inspection , Required upon installation completion to certify compliance with Class 1a NCC standards. Council Compliance Checks , Some councils require periodic inspections for rental properties or strata developments. Structural & Safety Maintenance , Regular checks are recommended every 5-10 years to maintain safety and efficiency. Insurance Requirements , Some home insurance policies require routine structural and electrical inspections. Expandify homes are low-maintenance, but periodic inspections ensure compliance and longevity.