The DA Trigger: Why Your 2025 Renovation Voids AS 2293.3-2005 Compliance

The “Grandfather Clause” Myth: AS 2293.3-2005 vs. 2018 and the Renovation Trigger

Let’s talk about “Frank.” Frank owns a medium-sized commercial building in a capital city. His building was built in 2008, and he’s always been diligent. He gets his Annual Fire Safety Statement (AFSS) done on time, and his building has always been compliant with the standard it was built to: the AS 2293.3-2005 standard.  

Now it’s 2025. The office market is tough, and to attract new tenants, he’s planning a major $500,000 renovation for two floors. He’s budgeted for new walls, carpets, and a modern fit-out.

Two weeks into planning, his building certifier drops a bomb: “Frank, because this work requires a Development Application (DA), your ‘grandfathered’ 2005 compliance is void. You must upgrade the entire emergency lighting system on these floors to the current AS/NZS 2293.3:2018 standard.”

Frank’s budget is blown. The “DA Trigger” just cost him tens of thousands of dollars he never saw coming.

This is, without a doubt, the biggest financial shock for owners of existing buildings. They get blindsided by it because they fundamentally misunderstand how compliance works over time. As an expert in this field, let me clear up the myth of the “grandfather clause.”

Let’s Be Clear: AS 2293.3-2005 is Superseded

First, an essential fact. The standard AS 2293.3-2005 is obsolete and superseded. It has been fully replaced by AS/NZS 2293.3:2018, which was then updated with Amendment 1 in 2021.  

Any new building work in Australia, from a skyscraper to an office fit-out, is legally bound by the current National Construction Code (NCC). The NCC 2022, which is in full effect in 2025 , references the current AS/NZS 2293:2018/2019/2021 suite of standards.  

In the September 2025 quarter alone, $6.39 billion in new non-residential building was approved in Australia. Every single dollar of that work must comply with the 2018/2021 standards. The 2005 standard is history… almost.

The “Grandfather Clause” – What It Really Means

So, is Frank’s building illegal? No. This is where the “grandfather clause” (or “maintaining baseline compliance”) comes in. It’s a very specific, very limited provision.

The “Maintain Baseline” Rule

An existing building, like Frank’s 2008 property, is allowed to maintain its compliance with the standards that were in effect at the time it was built. 

This means that for his annual AFSS inspection, the certifier tests the system against the 2005-era rules.

The “Like-for-Like” Replacement Caveat

This “grandfathering” also extends to minor, routine maintenance. If a single 2005-era “D32” spitfire fails, Frank can simply replace that one fitting with a modern, 2018-compliant “D32” fitting. This is a “like-for-like” replacement that doesn’t change the system’s original design or performance. This is not considered new work. 

But this protection is fragile. And Frank is about to shatter it.

The Upgrade Trigger: The Moment You Lodge a Development Application (DA)

Here is the single most important sentence for any existing building owner in Australia:

Your “grandfathered” compliance is valid only until you lodge a Development Application (DA) for major renovations.  

The moment you do, the “grandfather clause” evaporates. The council and your building certifier will assess your new work against the current standards.

Why? The Legal Logic Explained

This isn’t a cash grab. It’s a logical legal principle. The National Construction Code (NCC) applies to new building work. A DA for a major renovation (like moving walls, changing the floor layout, or changing the building’s use from Class 5 Office to Class 9a Health-care) is, by definition, creating a new building environment. 

The law sees this as an opportunity to upgrade the building’s safety features to the modern standard, ensuring occupants are protected by the latest safety principles. You can’t build a “new” 2025-era fit-out that relies on 2005-era safety systems.

This “DA Trigger” is the legal mechanism that forces the building stock to be progressively upgraded over time.

 Why the Upgrade Matters: 2005 vs. 2018 (What Changed?)

So why is the certifier forcing Frank to upgrade? What’s the big difference? The 13 years between 2005 and 2018 saw the single biggest revolution in lighting history: the dominance of LED technology.

The AS 2293.3-2005 standard was written for old, fragile fluorescent tubes and power-hungry incandescent bulbs.  

The AS/NZS 2293.3:2018 standard was written specifically to address the new, complex technology of LEDs and their batteries.  

Here are the technical changes that matter:

1. Lumen Depreciation (The Big One): LEDs don’t “burn out” like old bulbs; they just get dimmer over their lifespan. This is called lumen depreciation. The 2018 standard (specifically Part 1, which relies on Part 3 products) forces designers to account for this. They must use a “lumen depreciation factor” to ensure that an 8-year-old LED fitting still puts 0.2 lux on the floor. The 2005 standard had no such requirement.  
2. Updated Testing Methods: The Part 3 testing methods for LEDs, their complex driver electronics, and their lithium-ion batteries are far more rigorous in the 2018 version.  
3. End of Light Source Life (LSL): The new standards (specifically Part 2) now have rules for replacing fittings at their “end of light source life” (often 10 years), which simply wasn’t a concept with old fluorescent tubes that were replaced every 1-2 years.   

Frank’s certifier is forcing the upgrade because a 2005-era design (which assumed bright, new fluorescent tubes) is no longer a safe or accurate way to measure the performance of a modern LED system over its 10-year life.

Conclusion: Your Next Renovation Is an E&E Upgrade

If you own or manage an “existing” building (pre-2018), do not get caught in Frank’s trap. That “grandfather clause” you’re relying on is a paper shield.

The moment you plan a significant renovation, the very first line item in your capital expenditure (CAPEX) budget should be: “Full Emergency & Exit Lighting Upgrade to AS/NZS 2293:2018.”

Factor it in now. Talk to your fire contractor before you talk to your interior designer. Don’t let the DA Trigger be the $50,000 surprise that sinks your project.