Smart home retrofit Perth - how to add proper home automation to an existing home without a full rewire, what's realistic in a 1970s brick-and-tile vs a 2010s double-storey, and where the honest budget lines sit.
Retrofit is 70% of the work we do in Perth. Most homes we walk into were built long before smart home was a serious consideration - so the question isn't 'what's the perfect system' but 'what can we install without touching the plaster'.
Three categories of retrofit exist, and knowing which one you're in changes the budget by a factor of ten. Wireless-only (Lutron Caseta, Aqara, Philips Hue): $3-8k for a whole-home lighting scenes retrofit, no wall damage, plug-in wall units where switches used to be. Semi-hardwired (partial rewire in accessible ceilings, wireless elsewhere): $15-35k. Full rewire (Crestron, C-Bus, Control4 on new Cat6A backbone through the roof space): $60-150k+.
The single biggest factor in Perth is the roof space. A single-storey brick-and-tile with a walkable roof cavity is a dream to retrofit - we run Cat6A across the whole ceiling, drop into every room, and the client barely sees us. A double-storey with a tiled roof and no attic access is the opposite: everything runs on surface conduit or nothing.
Wall construction matters too. Double-brick internal walls (common in Perth pre-1980) mean you cannot fish cables through walls - so switches stay wireless, cameras run in ceiling coving, and speakers go where the roof access allows. Modern stud-frame builds are the opposite: fishing a cable down a stud cavity is straightforward if you have roof access at the top.
The retrofit stack that works in 90% of Perth homes: Lutron Caseta or Aqara for lighting scenes at the switch (wireless, no rewire, WAF-approved), Sonos or Bluesound for whole-home audio (Cat6 or Wi-Fi to each speaker), Ubiquiti UniFi for a genuinely reliable Wi-Fi backbone, Reolink or UniFi Protect for CCTV on PoE (uses existing ceiling access), and a Google Nest or Apple Home hub tying it together.
Where retrofit gets expensive: motorised blinds (each blind is a $600-1,800 retrofit and needs 240V nearby or a rechargeable battery motor), zoned climate control on ducted reverse cycle (adding VAV dampers to an existing duct system - $8-14k), and full-scene lighting on a house with 200+ downlights (the labour to replace every driver adds up fast).
The move we recommend for most Perth retrofits: don't try to do it all at once. Start with a Wi-Fi backbone, a lighting scene retrofit on the main living zones, and a CCTV system - that's $8-15k and covers 80% of the value. Add motorised blinds, audio and climate as the renovation cycle allows.
We site-survey every retrofit before quoting. We open a ceiling access hatch, check the roof space, measure a wall cavity, and tell you what's genuinely possible in your specific home - not what a brochure promises.
