Importance Level 2 (IL2)
Overview
Importance Level 2 (IL2) is the default classification for buildings and structures not included in Importance Level 1, 3, or 4.
It is commonly used for residential, commercial, and low-risk public buildings located near other structures or infrastructure.
Why this is important
IL2 buildings are subject to standard engineering requirements
Helps ensure compliance with the National Construction Code (NCC 2022)
Avoids under-engineering when IL1 is incorrectly selected
Impacts the overall cost and design limits within SMS
Examples of Importance Level 2 buildings
Buildings within 200m of residences, boundaries, roads, or power lines
Houses, hotels, offices, and commercial outlets
Car parking buildings
Low-rise residential construction
Buildings and facilities below the limits set for Importance Level 3
🛈 Note: The price difference between IL1 and IL2 can be significant. Only use IL1 if it is appropriate.
Tips & best practices
Always review the site location in ShedSafe® or Google Maps
Avoid under-classifying a structure—if unsure, select IL2
Refer to NCC 2022 for legal requirements
When in doubt, use the Request Engineering – Site Check form
Related Resources
Request Engineering (Site Check)
Review & updates
Version history:
v1.0 –Â
v2.0 – 06 August 2025
Article information
Category: Engineering & Site Specifications
Target audience: Franchise Users, Estimators
Business owner:Â
Version: v2.0
Last reviewed: 06 August 2025