If you want a smart home, do not leave planning until renovation is finished. Circuit and socket reservations should be arranged during the plumbing and electrical modification phase. Wireless retrofitting solutions offer a subpar experience and often suffer from unstable signals. Advance planning is essential for a reliable, fully functional smart home.

Start by identifying your must-have smart devices instead of buying everything at once on a whim.
- Core essentials: smart lighting, smart switches, smart door locks, curtain motors
- Upgrades: motion sensors, door/window contact sensors, smart security cameras
- Premium options: smart central air conditioning, fresh air systems
Smart switches come in neutral-live versions and single-live versions. Neutral-live switches are preferred for better stability, which require a neutral wire inside the switch junction box. Many traditional lighting boxes only have a live wire with no neutral line. In that case, you can only use single-live switches later, which may cause the lamp to glow faintly. Therefore, run a neutral wire for every lighting position during electrical work whenever possible.
Electric curtain track motors require power. Reserve an outlet inside the curtain box. For double tracks, place the outlet at the center. Without a pre-installed power supply, you will have to use battery-powered motors that need frequent recharging.
No pre-wiring is required for smart door locks; just leave adequate space on the entry door. For cameras and motion sensors, hardwired power is preferred to avoid constant battery replacement. Reserve outlets for smart mirrors and smart toilets in kitchens and bathrooms as needed.
Networking is the foundation of a whole-home smart system. Whole-home Wi-Fi coverage is recommended. For large homes, pre-run network cables and leave an Ethernet port in each room. Place the main router in the weak-current box and use panel APs for networking. Relying solely on one router will result in poor signal in room corners and frequent disconnection of smart devices.
It is best to stick to devices within the same ecosystem. Cross-brand compatibility can be troublesome. Draft your automation scenarios in advance, such as turning on lights automatically when the door is unlocked, or motion-activated night lights, and incorporate them into your plan.
A reminder: smart homes are for added convenience, not a necessity. Do not modify load-bearing structures for smart functions, and avoid overloading on devices. Focus on pre-wiring essential circuits first. You can add more devices gradually later instead of purchasing the full set upfront. Pre-reserving circuits during the plumbing and electrical stage is the low-cost key to building a whole-home smart system.