Start free trial

Answers library

Cited NCC compliance answers, in plain English.

A real practitioner question, answered with the source document, clause, and page named so you can check it yourself. A new one regularly. These are illustrative examples of the format; in the app, every answer is generated live against the operative edition for your jurisdiction.

NSWClass 1aNCC 202230 June 2026
What are the minimum ceiling heights for a Class 1a dwelling?
The NCC requires 2.4 m in habitable rooms and 2.1 m in non-habitable rooms, hallways, stairways and ramps for a Class 1a dwelling.
Read the answer
VICClass 1aNCC 202527 June 2026
Where do smoke alarms need to go in a new Class 1a house, and must they be interconnected?
A new Class 1a dwelling needs AS 3786 smoke alarms on every storey and near bedrooms, mains-powered and interconnected so they all sound together.
Read the answer
QLDClass 1aNCC 202226 June 2026
What thermal performance rating does a new home need to meet under NCC 2022?
NCC 2022 raises new Class 1 homes to a 7-star NatHERS envelope rating plus a separate whole-of-home energy budget, with adoption dates varying by state.
Read the answer

Ask your own

Have a question from your current project?

Start a 14-day free trial and ask DatumDesk directly. No charge for 14 days, cancel anytime before then.

Start 14-day free trial