Section J · Class 2–9
Section J reports for commercial jobs, in 48 hours.
Envelope, glazing and facade calculator, lighting, air-conditioning and hot water — all in one report, ready for the building permit.
One report, the whole section.
Glazing and calculator
Every window, door and shopfront entered into the facade calculator using the manufacturer's U-value and SHGC for the specified system, not defaults.
The facade calculator
Every glazed element, entered one at a time.
The calculator does not accept “double glazed”. Each window, door and shopfront goes in on its own line, with its area, its orientation and the manufacturer’s U-value and SHGC for the system actually specified. It is why the window schedule is the one thing worth sending early.
Facade calculator, filling
Illustrative elevation. Every project is entered from its own window schedule, against the climate zone and the NCC edition it falls under.
NCC editions
Assessed against the edition your permit falls under.
| Edition | Applies to | What it means for the drawings |
|---|---|---|
| NCC 2025 Victoria, from 1 May 2026 |
Projects permitted under the current edition | On-site solar must now be installed rather than allowed for, and the fabric provisions tighten. What changed → |
| NCC 2022 | Projects still running under the previous adoption | Facade calculator and illumination power density as published in that edition |
| NCC 2019 Amdt 1 | Long-running permits under the earlier edition | Section J as published in 2019, including the facade calculation route |
Not sure which applies? Tell us the permit date and it is confirmed before quoting.
Contact
Tell us about the project.
Tell us which report you need and send the drawings. A fixed quote comes straight back.