Navigating Building Code G7 Daylight Compliance – How BXG Is Helping Projects Get Across the Line

Increasing Scrutiny Around NZ Building Code G7 Compliance

Across New Zealand, more building projects are being delayed by Council Building Code Inspectors due to insufficient evidence of compliance with Clause G7 of the New Zealand Building Code — the requirement to provide adequate natural daylight to habitable spaces.

In particular, Councils are taking a stricter view of Acceptable Solutions G7/AS1 and G7/AS2, which outline how compliance should be demonstrated through quantitative daylight performance metrics.

Unfortunately, many consent applications are falling short — either due to poor interpretation of the code, incorrect use of the acceptable solutions, or lack of robust modelling to support the design.

Why It’s Happening

There’s been a noticeable shift in how councils review G7 daylight provisions. Basic geometric assumptions or simplified window sizing calculations are no longer enough. Inspectors are now expecting accurate modelling and verification to demonstrate that daylight requirements are met — especially in complex or high-density designs.

As a result, projects are being pushed back with requests for further information (RFIs) or outright rejections, creating costly delays for developers and designers.

How BXG Is Helping

At BXG, we’ve been working closely with design teams, developers, and councils to successfully guide projects through the compliance process. Leveraging our advanced understanding of the NZ Building Code and the practical application of G7/VM1, we use cutting-edge daylight simulation software to:

Accurately model internal daylight levels
Provide council-ready reports and visualisations
Optimise design to meet G7 requirements without compromising architectural intent

Whether it’s a multi-unit residential development or a bespoke architectural home, we help ensure that designs are code-compliant and council-approved — without last-minute redesigns or hold-ups.

The Results? Faster Approvals, Fewer Surprises.

Our clients are already seeing the benefits: streamlined building consent processes, fewer RFIs, and greater confidence at submission stage. With BXG on board, compliance with G7 becomes an integrated part of the design process — not a roadblock at the end.

Need Help With G7 Daylight Compliance?

If you’re working on a project that may require daylight modelling or if you've already been sent back to the drawing board by council, reach out to the team at BXG. We’ll help you understand what’s required, model your design accurately, and get your project back on track. Alex@bxg.co.nz