Building or renovating a home requires hundreds of decisions. To achieve a successful smart home, one of the most expensive mistakes happens right before the plasterboard goes up on the walls. Homeowners often assume Wi-Fi will handle their future technology needs, so they skip hardwiring data and communication cables.
Then they move in. The Wi-Fi drops out during video calls, the smart lights do not respond, and adding a single outdoor camera costs triple what it should have because the walls and ceilings are sealed.
Pre-wiring a house for home automation is highly cost-effective when the frame is exposed. The difference in cost between rough-in wiring and retrofitting technology after the walls are painted is massive. The walls are open once. This is your only chance to get the infrastructure right and future-proof the property.
This wiring guide explains exactly what cables you need to run during the rough-in stage of your build, ensuring your home is ready for whatever smart technology you decide to add later.
The Reality of Wireless Connectivity and Smart Technology
A common assumption in new builds is that everything is wireless now, making physical cables obsolete. This is a misunderstanding of how a modern smart home actually functions.
Wireless devices are convenient, but they rely on a clean, uncongested radio spectrum. When you place dozens of interconnected devices, televisions, laptops, phones, and wireless speakers on a single home network, the router becomes overwhelmed. Even when using various wireless protocols like Zigbee or Z-Wave, network traffic adds up. Furthermore, Melbourne homes often feature double-brick internal walls or heavy steel framing in modern extensions. These materials block wireless signals heavily.
The golden rule of reliable smart building is simple. If a device does not move, it should have a physical cable plugged into it. Hardwiring your stationary gadgets like televisions, desktop computers, and security cameras keeps them fast and reliable. More importantly, it frees up your wireless network for the connected devices that actually need to move with you, like your smartphone or tablet.
Essential #1: Smart Lighting Requirements and Smart Switches
Standard electrical wiring in Australia often uses a method where the active power goes to the light switch, but the neutral wire stays up in the ceiling at the light fitting itself. For standard fixtures, this works perfectly. The switch simply breaks the physical circuit to turn the light off.
Automated lighting works differently. Smart switches need a constant supply of power to maintain a connection to your home automation system, even when the light bulb is turned off. If the switch loses power, it drops off the network and cannot respond to an app command, a voice assistant, or a scheduled routine to change the colour temperature.
To keep a smart switch powered constantly, the wiring needs a neutral wire at the switch plate.
Many standard electricians will complete electrical work the traditional way unless explicitly told otherwise. If you are planning for comprehensive smart home automation in Melbourne, whether you use systems like C-Bus, Shelly, or Fibaro, you must instruct your electrician to run a neutral wire to every single light switch location in the house. The cost of adding this wire during the pre-wiring phase is minimal. Paying an electrician to crawl through your roof space to drop neutral wires down finished walls later is an entirely different story.
Essential #2: Ethernet Cabling for a Future-Proof Smart Home System
When planning your Ethernet cabling new build strategy, Cat6 is the standard. It provides high speeds and massive data bandwidth. You will use Cat6 cables for internet data, but also for a technology called Power over Ethernet (PoE). PoE allows a single Cat6 cable to transmit both internet data and low-voltage electrical power to a device simultaneously.
Here is where you must run Cat6 cables during your build:
Television Locations do not run just one cable behind your main television. Run at least three or four Cat6 cables to every location where a TV might go. Modern entertainment setups require hardwired connections for the smart TV, the gaming console, the Apple TV, and the soundbar. Hardwiring these devices prevents buffering when streaming 4K video.
Wireless Access Points (WAPs) A single Wi-Fi router sitting in an equipment rack in the garage will not provide strong coverage to the back bedrooms of a large house. You need wireless access points mounted to the ceilings throughout the property. Run Cat6 cables to the central ceiling area of your living room, the upstairs hallway, and the outdoor alfresco area. These WAPs are powered via PoE, meaning they only need that single cable to function.
Essential #3: Security and Smart Home Automation
When doing the electrical rough-in for our recent Melbourne smart home wiring and CCTV projects, we always ensure the homeowner understands the limits of wireless tech. Wired security systems are infinitely more reliable than battery-powered wireless alternatives. Wireless cameras require regular battery changes and can suffer from delayed recording triggers. Hardwired PoE cameras record continuously, never need charging, and do not drop out when the Wi-Fi gets congested.
Plan to run Cat6 cable to the eaves for future security camera installation. You should allocate one cable for the front door, one covering the driveway, one for the side gate, and one for the backyard.
Additionally, run Cat6 cable from your main networking cabinet to your front boundary fence or pedestrian gate. This allows you to install a hardwired video intercom. When a courier rings the doorbell, the hardwired data connection instantly sends the video feed to your controller or a touch screen inside the house without the lag common to wireless doorbells.
Essential #4: AV Equipment and Entertainment Systems
If you enjoy listening to home audio or want a cinematic experience in your living room, pre-wiring your speakers is highly recommended. Wireless speakers require a power point anyway, which means you still have cables visible along your skirting boards.
Architectural speakers sit flush inside your plasterboard ceiling or walls, remaining completely hidden while delivering exceptional sound quality. To prepare for this, you need to run 16/2 or 14/2 speaker wire, alongside any necessary coax cable, from your main television location (or central networking rack) to the specific locations where the speakers will sit. To avoid electromagnetic interference, ensure audio cables are not run directly parallel to heavy power lines.
For a standard living room audio/visual system installation, run speaker wire to the front left, front right, and centre channel positions around the TV. Run two more cables to the ceiling slightly behind the main seating area for rear surround sound. Finally, run a dedicated interconnect subwoofer cable to the corner of the room where the subwoofer will sit.
Because pre-wire is buried behind your plaster, it needs to be done right the first time. Our professional structured cabling and rough-ins are backed by our lifetime workmanship warranty.
Essential #5: Motorised Window Coverings and Low Voltage Wiring
Motorised blinds and curtains elevate a home immediately, but they require physical power to avoid the hassle of troubleshooting or recharging battery packs every few months.
During the framing stage, ask your electrician to run a power feed to the top corners of your windows. Depending on the brand of smart home devices you intend to use, this might be a standard 240v electrical cable or low-voltage wiring run back to a central power supply. Running these cables before the plasterboard goes up means your future blinds will operate quietly and reliably with absolutely zero visible wiring.
Essential #6: Future-Proofing Heavy Infrastructure and Upgrades
You might not own an electric vehicle today, and you might not have the budget for a solar system and a home battery during this renovation. That is completely fine. However, as CEC-accredited electricians focused on energy efficiency, we highly recommend planning the infrastructure for these additions now. It costs almost nothing during the build phase.
Electric Vehicle Charging Fast EV chargers require dedicated, high-capacity electrical circuits. Ask your builder to run a thick, empty 32mm conduit pipe from your main electrical panel to the wall in your garage where a car charger would logically sit. When you buy an EV for your home upgrade three years from now, the electrician simply pushes the heavy electrical cable through the empty pipe. No cutting into your garage walls required.
Solar and Battery Storage similarly, run an empty 50mm conduit pipe from your roof cavity straight down to your main switchboard. When you decide to add solar panels or appliances like a battery system, the installers will use this conduit to run the heavy DC cables from the roof down to the inverter. It keeps the installation neat and prevents unsightly conduits from being bolted to the exterior brickwork of your new home.
Room-by-Room Smart Wiring Guide and Checklist
To keep your electrical planning organised, use this basic checklist when reviewing your architectural plans.
Living Room / Home Theatre
- Four Cat6 cables behind the main television location.
- One Cat6 cable and one coax cable for an antenna connection.
- Speaker wire to ceiling/wall locations for surround sound.
- A conduit pipe was chased into the wall behind the TV to hide the HDMI cables dropping down to the entertainment unit.
Kitchen
- Neutral wires at all light switches.
- Cat6 cable to a central wall location if you plan to mount a smart home touch screen.
- Power provisions in the ceiling if you are installing motorised skylight blinds.
Bedrooms
- Two Cat6 cables to the wall opposite the bed for a future television.
- Power cables to the top corners of the windows for motorised block-out blinds.
- Neutral wires at the light switches.
Home Office
- Three Cat6a or Cat6 cables to the primary desk location.
- Neutral wires for lighting.
Hallways and Ceilings
- Cat6 cables to central ceiling locations for Wireless Access Points (WAPs). Allocate one WAP for every 100 to 150 square metres of living space.
- Cat6 cables to the internal wall near the front door for an alarm keypad or intercom monitor.
Exterior and Garage
- Cat6 cables to the eaves for PoE security cameras.
- Cat6 cable to the front gate for an intercom.
- Empty 32mm conduit from the switchboard to the garage wall for future EV charging.
- Empty 50mm conduit from the roof space to the switchboard for future solar panels.
- Speaker wire to the alfresco ceiling for outdoor audio.
Professional Installation and Comprehensive Electrical Planning
Standard electricians are experts at maintaining the highest electrical safety, compliance, and lighting standards. However, a standard electrical plan rarely includes the comprehensive electrical and low-voltage wiring required for a modern, integrated home.
If you want a house that functions smoothly, you need to plan the technology alongside the plumbing and the structural framing. The best time to consult an integration specialist is before your architectural drawings are finalised. If you are already building, you must finalise these device requirements before the electrical rough-in begins. Once the insulation goes in and the plasterboard goes up, your options diminish rapidly.
Investing a small amount of your budget into pre-wiring now gives you total flexibility later. The infrastructure hidden in your walls dictates what is possible for the lifespan of your home.
Planning a new build or major renovation in Melbourne? Send us your floor plans early in the process. We can map out a complete smart wiring and automation strategy that protects your home from becoming technologically obsolete the moment you move in.