Alarms are more than ten years old
Smoke alarms have a limited working life, and sensors become less reliable over time even if the unit still beeps during a test. If you're unsure of the age of your alarms, it's worth having them checked.

Residential Safety Services
Stewart Electrical Group installs and upgrades smoke alarms for homes across Sutherland Shire and St George. Many older properties in this area still have a single ionisation alarm near the front door, which no longer reflects current expectations for coverage, alarm type or interconnection between alarms.
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Tell us about the electrical work you are planning and the team will be in touch to discuss the next step.
01 / Signs You Need This
Missing, expired, damaged or poorly located alarms should be assessed rather than relied on because the test button still produces a sound.
Smoke alarms have a limited working life, and sensors become less reliable over time even if the unit still beeps during a test. If you're unsure of the age of your alarms, it's worth having them checked.
Standalone alarms only sound in the room they're fitted in. In a home with multiple bedrooms or levels, an alarm going off at the far end of the house may not wake occupants sleeping elsewhere.
Ionisation alarms are generally slower to detect smouldering fires, which are a common cause of house fires overnight. Photoelectric alarms are now the preferred type for residential properties.
Regular false triggering, or a persistent chirp even after changing the battery, usually means the unit is failing and needs replacement rather than repeated battery changes.
Changing the floor plan of a home, adding a bedroom, or converting a garage or attic into livable space, all change how many alarms are needed and where they should be positioned.
Smoke alarm requirements apply to owner-occupied and rental properties alike. If you're preparing a property for sale or a new tenancy, it's a sensible time to confirm alarms meet current requirements.
02 / What's Included
Alarm type, placement, power source and interconnection are considered against the property layout and applicable NSW requirements.
Supply and installation of photoelectric smoke alarms, which respond faster to smouldering fires than older ionisation type alarms still found in many established homes.
Alarms wired into the home's electrical circuit and interconnected so that if one alarm detects smoke, all alarms in the property sound together.
Hardwired alarms fitted with battery backup so they continue to operate during a power outage, giving continuous protection regardless of mains power.
Alarms positioned in line with recommended placement for bedrooms, hallways and each level of the home, rather than a single alarm covering an entire floor.
Removal of old, expired or non-compliant alarms and replacement with current units, including updating standalone alarms to an interconnected system where suitable.
Full functional testing of every alarm and the interconnection between them before handover, so you know the system works as intended.
03 / How the Job Works
We review every level and sleeping-area path before proposing alarm quantities and positions.
Let us know the size of your home, number of bedrooms and levels, and whether you currently have any alarms installed, so we can scope the job before visiting.
We inspect the property, check existing alarm placement and wiring, and identify how many alarms are needed and where they should go.
You receive a clear quote covering the number of alarms, whether hardwiring or interconnection is required, and any additional cabling work.
Alarms are fitted and wired according to the agreed placement, with cabling run neatly through ceiling spaces and walls where required.
Each alarm is tested individually and as part of the interconnected system, confirming that triggering one alarm activates all others correctly.
We issue a Certificate of Compliance for Electrical Work (CCEW) covering the completed installation and explain how to test and maintain the alarms going forward.
04 / Safety & Compliance
Smoke alarm requirements in NSW apply to all residential properties, whether owner-occupied or rented, and cover the type, placement and interconnection of alarms depending on when the home was built and its layout.
Work involving hardwired smoke alarms must be carried out by a licensed electrician, with the installation tested and a Certificate of Compliance for Electrical Work (CCEW) issued for the completed job.
Landlords and property managers have specific ongoing obligations regarding smoke alarm testing and battery replacement in rental properties. We can advise on what's required for your specific property, but final compliance responsibility sits with the owner or managing agent.
05 / Exclusions & Limitations
Domestic alarms are distinct from monitored and commercial fire systems, which may require specialist design and certification.
Ongoing testing, cleaning or battery replacement after installation
Fire safety measures for commercial or multi-residential common areas requiring separate fire compliance certification
Patching or painting of ceiling penetrations made to run interconnection cabling
Monitored fire alarm systems connected to an external monitoring service
Structural or ceiling works needed to access difficult roof spaces
06 / Local Knowledge
A large share of homes across Sutherland Shire and St George were built between the 1950s and 1980s, meaning many still rely on original or partially updated smoke alarm setups. Suburbs like Sylvania, Sutherland, Kogarah and Hurstville have a strong mix of single-level brick veneer homes where a straightforward hardwired interconnected system can usually be retrofitted without major disruption.
Double-storey homes and properties with converted attics or extended floor plans, more common in newer pockets of the Shire and parts of St George closer to Kogarah and Carlton, need careful placement to make sure every level and sleeping area is properly covered rather than relying on a single alarm near the stairs.
Units and townhouses across Hurstville, Rockdale and Sutherland often have alarms tied into a broader building system or shared fire safety requirements, so we take building type into account when scoping the work and let owners know where responsibility may sit with a body corporate.
Many local homeowners are also renovating older properties rather than rebuilding, particularly in established streets around Oatley, Gymea and Miranda. These renovations are a practical opportunity to bring smoke alarm coverage up to date at the same time as other electrical work, rather than treating it as a separate job later.
What Our Clients Say
Sean W.
"Darcy and Blake are professional in every sense. We've used them now for two rounds of renovation works. Both times the works were completed to a high standard, communication was clear throughout, and pricing was fair and transparent."
Johanna F.
"Darcy and the team at Stewart Electrical were brilliant to deal with from start to finish. Friendly, professional and found the perfect solution within my budget. Communication confirming the job and timing on the day was great."
Albert P.
"It is great dealing with Darcy and Blake, both projects were delivered on time, budget and with great feedback from our clients. We are looking forward to working with you in future."
Laura W.
"Darcy is quick to respond, manages expectations with a time window of arrival and keeps to it, gets the job done quickly. Was professional dealing with a very fragile light fitting. Friendly, good to chat to."
Andrea L.
"I've worked with Darcy and his team across three properties now. Their professionalism, communication and knowledge is outstanding, honestly rare when dealing with trades. They actually care about the work they do. I won't use any other electrician."
Tahira K.
"Fantastic experience with the ceiling fan installation. Smooth, efficient service at a reasonable price, completed quickly without compromising quality. Friendly, helpful staff who answered all my questions. Highly recommend!"
Maryanne P.
"Very impressed, prompt replies, excellent communication and a very high standard of work. The team are professional, friendly and easy to deal with. Highly recommend!"
Amanda W.
"Excellent communication, prompt to the minute, and lovely to deal with. Darcy fixed our tricky issue with creative thinking and we were very satisfied with the result. Fantastic electrician, highly recommend!"
Shanel H.
"Darcy was the only electrician who took the time to contact me when I lost power. He swiftly identified and fixed the issue, with recommendations to prevent it reoccurring. Professional, punctual, and quoted before starting. Happy to give SEG our repeat business."
03 / Recent Projects

Power Point Installation · Mascot
Complete lighting installation, power supply and outlet setup, data cabling and switchboard upgrade.
View service
Commercial Electrical
Electrical upgrades across hotel rooms, shared common areas and the gym in a live hospitality environment.
View service
Lighting Installation · Balmain
Electrical design and construction for a bathhouse, including lighting, heating systems and an infrastructure upgrade.
View service04 / Popular Services
Residential, commercial and specialised electrical work, planned around the property and completed with close attention to safety and finish.
Modern circuit protection and switchboard work.
→02Methodical diagnosis for electrical faults and outages.
→03Indoor, outdoor and architectural lighting work.
→04New outlets, circuits and practical power upgrades.
→05Smoke alarm installation and compliance work.
→06Full and partial rewiring for established homes.
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05 / Our Standards
Careful installation, thorough testing and a considered finish.
The scope and next steps are explained in plain language.
A clear written quote sets out the agreed work before it begins.
Work areas are treated carefully and left clean at handover.
07 / Local Service Areas
08 / Frequently Asked Questions
This depends on the size and layout of your home, including the number of bedrooms and levels. As a general principle, alarms are needed in hallways leading to bedrooms and on every level of the home, but we confirm exact placement during the site assessment.
Older ionisation alarms already installed may still be present in some homes, but photoelectric alarms are now the preferred and recommended type due to faster response to smouldering fires. We generally recommend upgrading ionisation alarms when replacing or adding to a system.
Interconnection means every alarm sounds if one is triggered, which helps provide warning throughout the home. We can advise whether your property's existing setup meets current expectations or would benefit from interconnection.
Yes, this is a common upgrade for older homes. We assess ceiling access and existing wiring to determine the best approach for converting to a hardwired, interconnected system.
Landlords and agents have ongoing obligations for smoke alarm maintenance in rental properties in NSW. We can install and test compliant alarms, but ongoing testing and battery checks are typically the landlord or agent's responsibility.
Yes, a Certificate of Compliance for Electrical Work is issued for hardwired smoke alarm installation, confirming the work has been tested and completed to the required standard.
Related Electrical Services
Request a Quote
Contact us to arrange a smoke alarm assessment for your Sutherland Shire or St George property and a clear quote for any upgrades needed.