Smoke Alarm
Compliance & Upgrades

South Australia has progressively tightened its smoke alarm requirements over the last several years, and a lot of homeowners and landlords are genuinely unsure whether their property is compliant. The short version: if your home still relies on a single battery-powered smoke alarm from years ago, there’s a good chance it no longer meets current requirements, particularly if the property is being sold, leased, or has recently changed hands. The requirements are staged based on the age of the property and when it’s sold or a new tenancy begins, which is exactly why we recommend getting an assessment rather than guessing.

The clearest trend in the regulations is a push toward hardwired, interconnected smoke alarms in place of older battery-only units. This isn’t just red tape — interconnected alarms genuinely save lives, because a fire starting in a kitchen or lounge room triggers every alarm in the house simultaneously, including ones in bedrooms where a closed door might otherwise muffle a standalone alarm. If your smoke alarms are more than ten years old, chances are they need replacing regardless of the wiring question, as most alarms have a limited lifespan stamped on the unit.

We keep across the current SA requirements so you don’t have to, and we’ll give you an honest assessment of where your property stands rather than trying to upsell you on work you don’t need. If your alarms are already compliant, we’ll tell you that. If they’re not, we’ll explain exactly what’s required and why.

If you own a rental property in South Australia, smoke alarm compliance isn’t optional — it’s a legal obligation you carry as a landlord. Alarms need to be installed, working, tested, and where required, hardwired and interconnected. Letting this slide isn’t just a safety risk for your tenants; it can also expose you to liability and complications with your insurance if something goes wrong and your property isn’t compliant.

We work with a lot of landlords and property managers across Adelaide who want to get on top of compliance across their whole portfolio rather than dealing with it one property at a time as leases turn over. We can assess a property, quote the upgrade, complete the work, and hand over a compliance certificate that goes straight into your records — useful if you're ever asked to demonstrate compliance to an insurer or in the event of a dispute.

Battery-only alarms are still legal in some circumstances depending on the age and type of dwelling, but hardwired interconnected alarms are increasingly the expectation, especially at the point of sale or when a new tenancy begins. If you’re unsure which category your property falls into, we’ll happily talk you through it before any work starts.

We start by inspecting every existing smoke alarm in the property — checking the type, age, wiring, and whether they’re correctly located in hallways, bedrooms, and living areas as required. We test each unit and note anything that’s expired, faulty, incorrectly positioned, or simply too old to trust. This gives us a clear picture of exactly what needs to change to bring the property up to current standards.

Where an upgrade is needed, we install hardwired, interconnected photoelectric smoke alarms with battery backup, wired back to the switchboard or an existing lighting circuit. Photoelectric alarms are generally regarded as more responsive to the smouldering, slow-burning fires that are common in homes, and interconnection means every alarm in the property triggers together regardless of where the smoke is detected.

Once the upgrade is complete, we test the full system to confirm every alarm is triggering correctly and communicating with the others, and we issue a Certificate of Compliance for Electrical Work. This certificate is your proof that the job was done to standard, and it's the document real estate agents, property managers, and insurers will want to see.

Costs vary depending on the number of alarms, whether you're starting from battery-only units or a partial hardwired system already, and how accessible your roof space is. As a general guide, most single smoke alarm upgrades cost from around $180 to $250 per unit installed, with whole-house interconnected systems typically landing between $600 and $1,500 depending on the number of alarms required. We'll always provide a fixed, written quote before starting.