Published July 19, 2026 · Reviewed by the Unbiased Advice & Insights editorial team · How we research and score
Building a smart home doesn't require a huge budget. With careful planning and affordable devices like smart plugs, bulbs, and sensors, you can automate your home for under $100. This step-by-step guide will walk you through the process, from choosing a hub to maximizing value with routines and energy savings.
1. Start with a Plan
Before buying anything, list what you want to automate. Common starting points are lights, small appliances, and security. Prioritize the areas where automation will save time or energy. For example, automating a lamp in the living room or a fan in the bedroom. Stick to one or two rooms initially. This keeps costs low and setup manageable. Also consider your daily routines: do you often forget to turn off lights when leaving? A smart switch or bulb can help. Do you want to simulate occupancy while on vacation? A smart plug with a schedule can do that. Write down your goals and rank them by importance. This plan will guide your purchases and prevent overspending on unnecessary gadgets.
2. Choose a Hub or Voice Assistant
Most budget smart devices work with Amazon Alexa or Google Assistant. You don't need a dedicated hub if you use a voice assistant. An Amazon Echo Dot or Google Nest Mini is affordable and acts as a control center. If you prefer a hub, consider a used Echo Plus or a Hubitat for more advanced automation. Our editorial team compared buyer feedback and found that voice assistants are the most cost-effective starting point. They also allow voice control, which is convenient for quick actions like turning off lights without reaching for your phone. However, if you plan to use many Zigbee or Z-Wave devices, a hub may be necessary. For a simple setup with Wi-Fi devices, a voice assistant is sufficient.
3. Add Smart Plugs First
Smart plugs are the easiest way to start. They turn any plugged-in device into a smart device. Look for a two-pack from brands like Kasa or Wyze. Plug in a lamp, a coffee maker, or a space heater. Use the app or voice commands to turn them on/off. Set schedules so lights turn on at sunset. A drawback: some plugs are bulky and may block adjacent outlets. Check the current price on Amazon for the best deals. Smart plugs are also great for energy monitoring: some models track power usage, helping you identify vampire electronics. For example, you can see how much energy an old TV consumes in standby and schedule it to turn off completely when not in use. This can save a few dollars on your electricity bill each month.
4. Upgrade Lighting with Smart Bulbs
Smart bulbs let you control brightness and color. For budget options, consider Philips Hue White (not the color ones) or Sengled. A four-pack of white bulbs is often under $25. Install them in lamps or fixtures you use daily. Create routines like waking up with a gradual sunrise. One honest drawback: smart bulbs need constant power, so they won't work if the wall switch is off. Use smart plugs for switched lamps instead. Also, consider the bulb type: if you have dimmer switches, check compatibility. Some smart bulbs buzz on older dimmers. For best results, use smart bulbs in fixtures that are always powered, like table lamps or ceiling lights with smart switches. You can also group bulbs in a room to control them together. For example, create a "Living Room" group and turn all lights off with one command.
5. Add Sensors for Automation
Sensors add intelligence. A motion sensor can turn on lights when you enter a room. A door/window sensor can alert you if a door is opened. Budget options include Wyze sensors or Aqara sensors (require a hub). Place a motion sensor in the hallway for a nightlight effect. A drawback: sensors may have limited range or require batteries. Check compatibility with your voice assistant before buying. Sensors can also be used for security: a door sensor can trigger an alarm or send a notification when the door opens unexpectedly. For energy savings, a motion sensor can turn off lights in unoccupied rooms. Some sensors also measure temperature and humidity, which can trigger a smart plug to turn on a fan or heater. Start with one or two sensors in high-traffic areas to see how they fit your lifestyle.
6. Tips for Maximizing Value
- Use routines: In the Alexa or Google Home app, create routines that combine actions. For example, say "Goodnight" to turn off all lights and lock the door.
- Buy multipacks: Smart plugs and bulbs are cheaper per unit in multipacks. Look for sales on Amazon.
- Consider used or refurbished: Many smart speakers and hubs are available refurbished at lower prices.
- Stick to one ecosystem: Mixing Alexa and Google can be confusing. Pick one assistant and stick with it.
- Focus on energy savings: Use smart plugs to turn off vampire electronics. Schedule bulbs to turn off when not needed.
- Start small: Don't buy everything at once. Add devices gradually as you find needs.
- Leverage IFTTT: If This Then That (IFTTT) applets can connect devices across brands for free. For example, if your weather app says it's raining, turn on a smart plug to close the windows. IFTTT adds flexibility without extra cost.
- Use voice shortcuts: Set up custom voice commands for complex actions. For instance, "Movie time" could dim lights and turn on the TV.
Frequently Asked Questions
Can I mix different brands of smart devices?
Yes, as long as they support a common standard like Wi-Fi, Zigbee, or Z-Wave. Many affordable devices work with Alexa or Google Assistant, so you can mix brands. However, some features may require a hub or specific app. Stick to one ecosystem to avoid compatibility headaches.
Do I need a smart home hub?
Not necessarily. Many budget devices connect directly to Wi-Fi and work with a voice assistant. But a hub can improve reliability and enable local control. For a simple setup, skip the hub. For more advanced automation, consider a hub like a used Amazon Echo Plus or a Hubitat.
How much can I expect to spend for a basic setup?
You can start for under $50. A two-pack of smart plugs costs around $15-20, a four-pack of smart bulbs about $20-30, and a sensor bundle around $20. A voice assistant like an Echo Dot is often under $30. Total: $70-100 for a solid starter kit.
What is the best way to control smart devices when I am away from home?
Most smart devices come with a companion app that lets you control them remotely over the internet. As long as your phone has internet access and your home hub or Wi-Fi network is online, you can turn devices on or off, check sensor status, and receive alerts. For example, you can turn on a smart plug to make it look like someone is home, or check a door sensor to see if the door is closed. Remote access is a key benefit of smart home systems.
Can smart devices work without internet?
Some smart devices can work locally without internet, but many require an internet connection for full functionality. For example, Wi-Fi smart plugs and bulbs typically need internet to be controlled via the app or voice assistant. However, if you have a hub that supports local control (like Hubitat or Home Assistant), you can automate devices even when the internet is down. For budget setups, most devices rely on cloud services, so an internet outage may limit control to manual operation or physical switches.
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See our full buying guides hub and our research and scoring methodology. We compared specifications and verified owner feedback; we did not physically test every product.