The most expensive smart home mistake is adding technology to a finished house. Not because smart home products are expensive — many are not. But because the infrastructure that carries them — conduit, cabling, panel capacity, network provisions — costs almost nothing when installed during construction and significant money when retrofitted through finished walls, ceilings and floors. This essay explains which decisions must happen during design, which can wait, and how to build a home that is genuinely ready for smart technology without overcommitting to products that will change.

Smart home technology changes faster than any other building system. The hub platform, the specific devices, the lighting ecosystem, the camera brand — all of these will evolve significantly over the life of a home. What does not change is the infrastructure that carries them: the conduit through the wall, the cable in the ceiling, the circuit in the panel, the network cabinet in the communications room.

The design principle for smart home in a new home is this: invest in infrastructure during construction, invest in products progressively over time. The infrastructure is permanent. The products are not.

The Infrastructure Layer — What Goes In During Construction

Four infrastructure decisions made during the design and construction of a new home determine whether smart home technology can be added seamlessly or expensively throughout the life of the building.

1. The Network Cabinet and Structured Cabling

Every smart home needs a central point from which its networks, systems and controls are distributed. This is the network cabinet — a lockable enclosure typically 300mm to 600mm wide, mounted in a laundry, study or dedicated comms room.

During construction, Cat6 Ethernet cables should be run from the network cabinet to every room in the house — not just the obvious ones. Ethernet is used not only for computers and televisions but for security cameras, smart TVs, streaming devices, home automation hubs and any device where Wi-Fi reliability matters. The cable costs a few dollars per metre. The labour to install it during construction is minimal. The labour to retrofit it through finished walls is substantial.

Also from the network cabinet: speaker cables to any room where in-ceiling audio is planned, coaxial cable to any television location, and conduit runs to the electrical panel and to the roof for solar monitoring cabling.

The network cabinet should be provided with a dedicated power circuit, including at least two double power points, and adequate ventilation for the equipment it will eventually house.

2. Electrical Panel Capacity and Circuit Provisioning

The electrical panel is the foundation of the smart home energy system. A new home designed for smart home technology should have an electrical panel with spare circuit capacity — not just for current loads but for the systems that will be added progressively.

3. In-Ceiling and In-Wall Audio Cabling

In-ceiling speakers produce significantly better sound quality and room integration than freestanding speakers and cannot be retrofitted without opening the ceiling. Speaker cable, a relatively inexpensive two-core cable, must be run from the central audio distribution point to each speaker location before the ceiling is lined.

The rooms where in-ceiling audio is most valued are the main living and dining area, outdoor entertaining area, kitchen, and main bedroom. In-ceiling subwoofers in a home cinema room require a more substantial cable run and acoustic treatment considerations that should be addressed during design.

The decision about which brand of speaker and which amplifier to use can be made at any time. The cable must be in the ceiling before the plasterboard goes up.

4. Smart Switch Wiring — Neutral Wire Provision

This is the most commonly overlooked electrical provision for smart homes in new construction — and the most frequently regretted omission.

Most smart light switches require a neutral wire at the switch location in addition to the active and switched live wires that standard switches use. Older wiring practices in Australia commonly omit the neutral wire at the switch, running only active and switched live. In a new home, specifying neutral wire at every switch position costs nothing — it is a brief instruction to the electrician before rough-in. In an existing home, retrofitting neutral wires to switch positions typically requires running new cable from the ceiling rose to every switch, a significant and messy job.

Include a neutral wire at every switch position in the electrical specification. This single instruction, communicated to the electrician before rough-in, enables any smart switch to be installed at any time in any location without restriction.

The Three-Stage Smart Home Approach

The most practical approach to smart homes in a new Canberra home follows three stages that are deliberately sequenced to match the construction and occupation timeline.

The Stage 3 investments are more valuable when they are based on lived experience of the home, knowing which windows need automation most, which rooms benefit from audio, and which routines actually reflect how the family lives. A smart home built progressively from a solid infrastructure foundation is more useful and better value than one specified in full before occupation.

The Connection to Passive Solar Design

For a Canberra home designed to passive solar principles, smart home technology is not decoration; it is the active layer that completes the passive system.

A passive solar home captures heat in the thermal mass during the day and needs to retain it through the cold night. The critical intervention is closing insulated curtains or blinds at or before sunset. This single action done consistently every evening can reduce overnight heat loss through north-facing glazing by 40–60%. A motorised blind system linked to a sunset schedule does this automatically, every day, without the occupant needing to remember. The passive solar system performs as designed.

Similarly, a battery system that charges from solar generation during the day and discharges in the evening when the family is home and using power is the active complement to a passive solar home that has already reduced heating demand. The solar panels generate more than the home needs during peak generation hours. The battery stores what the home cannot use immediately. The smart energy management system orchestrates this automatically.

In a well-integrated Canberra home, passive solar design, solar PV, battery storage, and smart home energy management, the gap between a 7-star NatHERS home and a net-zero energy home is largely bridged by the intelligence of the control layer, not by additional construction cost.

What to Include in a Smart Home Brief

When briefing a building designer or builder on smart home requirements for a new home, the most useful information is not a product list. It is a description of how the family expects to live in the home — and which moments of daily life they most want the home to support automatically.

•       Morning routine: does the home need to respond automatically to waking, brightening lights, adjusting heating, and starting the kettle?

•       Departure and arrival: should the home recognise when the last person has left and arm security, set back the temperature, turn off all lights, and reverse when someone arrives?

•       Evening: should the living room transition automatically from daytime light levels to warm evening lighting? Should the blinds close at sunset?

•       Energy management: is solar and battery storage planned, and should the home schedule heavy loads (dishwasher, washing machine, hot water) to run during solar peak hours?

•       Entertainment: is whole-home audio a priority? Is a home cinema room planned?

•       Outdoor living: does the outdoor area need audio, automated lighting, or automated blinds or louvres?

These answers are not a list of specific products, but are the brief the building designer needs to specify the correct infrastructure. The products will be chosen and will change. The infrastructure is specified once and must be right.