How to Build a Smart Home in a Small Apartment for Under $100

You don’t need hundreds of dollars, a complicated hub or a house full of gadgets to make a small apartment feel a lot smarter.

In fact, if you’re renting or simply don’t have much space, starting small is probably the better approach.

A smart home should make your apartment easier to live in. It should turn lights on when you need them, let you control ordinary devices from your phone, give you a little more awareness of what’s happening around your home and help you avoid those little daily annoyances that add up.

The problem is that once you start looking at smart-home products, it is very easy to spend more than you intended. One smart bulb leads to a hub. The hub leads to sensors. Then you discover you need another device to make everything work together, and suddenly your “budget” smart home isn’t looking very budget-friendly.

So instead of giving you a giant list of cheap gadgets, let’s build something deliberately.

For this setup, the goal is to spend about $100 on a small apartment smart home that gives you useful automation, better lighting and a basic layer of security, without drilling into walls or filling your limited space with unnecessary equipment.

Prices change, especially on Amazon, so treat the $100 figure as a target rather than a permanent price guarantee.

What I Would Buy for a Small Apartment Smart Home

If I were starting from scratch with roughly $100, I’d keep the setup simple:

Two Kasa smart plugs, two Govee smart bulbs, and the Tapo T31 sensor kit.

That gives us three different types of smart-home functionality without buying three unrelated ecosystems.

The Kasa plugs handle everyday automation. The Govee bulbs handle lighting. The Tapo kit adds door and window monitoring while also giving us a hub that can support additional Tapo sensors later.

That’s important because I don’t want this to be a collection of gadgets that happens to cost less than $100. I want it to be a small apartment smart home that can actually grow with you.

1. Start With Two Smart Plugs

The first thing I’d buy is the Kasa HS103P2 two-pack of smart plugs.

Smart plugs are probably the easiest way to make an existing apartment smarter because you don’t have to replace the appliance you’re already using.

You plug the Kasa into the wall, plug your lamp or another compatible device into the Kasa, and suddenly that ordinary device can be controlled from your phone and scheduled to turn on or off automatically.

For a small apartment, two plugs can go surprisingly far. One could control a living-room lamp. The other could be used for a bedroom lamp, fan or another suitable device you already own.

That is much more useful than buying two brand-new smart appliances simply because they’re marketed as smart.

You already have the apartment. The point is to make the things you own work a little better for you. For example, you could have your living-room lamp turn on around the time you normally get home, then switch off automatically later in the evening. A bedroom lamp could turn off at bedtime without you having to get up again.

And if you’re away for a few days, scheduled lighting can make the apartment look less obviously empty.

We’ve gone much deeper into this idea in Things You Can Automate With Smart Plugs in a Small Apartment, so I wouldn’t repeat all of those automations here. This article is about building the starter setup, while that guide can take you through everything you can do once the plugs are installed.

Why I’m spending part of the budget on smart plugs

Because they give you multiple automation possibilities without requiring you to buy new furniture or appliances.

That’s precisely what a great small-space upgrade should do

2. Add Two Smart Bulbs Instead of Replacing Your Lamps

Next, I’d add the Govee smart bulb two-pack.

Again, the idea is to work with what you already have.

If you have a bedside lamp, floor lamp or table lamp you like, there’s no reason to replace the entire lamp just because you want smarter lighting. A smart bulb can give you control over brightness, color and schedules while the lamp itself stays exactly where it is.

For a small apartment, that can be especially useful because lighting has a much bigger effect on the feel of a room when you don’t have a lot of space to work with.

Bright overhead lighting can make a tiny bedroom or living room feel harsh. Softer lighting in the evening can make the same room feel much more comfortable.

You can also create routines around how you actually use the space.

Maybe the bedroom lights become warmer and dimmer in the evening. Maybe the living-room lamp comes on before you get home. Maybe everything switches off at bedtime.

The point isn’t to turn your apartment into a light show. It’s about making it fit seamlessly into your daily routine. And because we’re using bulbs in lamps you already own, we’re adding that functionality without taking up another inch of floor or shelf space.

3. Use the Tapo T31 Kit for the Security Layer

For the third part of the setup, I’d use the Tapo T31 kit, which gives you the Tapo H100 hub along with three Tapo T110 door and window sensors.

This is one reason I prefer building the $100 setup around a few carefully selected products rather than picking the cheapest item in every category.

The T31 gives us more than three little sensors. It also gives us the hub that lets those sensors communicate with the rest of the Tapo system.

In a small apartment, you could put the sensors on the entry points that matter most. The main door is an obvious place. Then you might use another on an accessible bedroom window and another on a balcony door or second vulnerable window.

You don’t need to put a sensor on every opening in the apartment. The key is to identify the places where knowing that something opened would actually be useful.

And because the sensors are small and designed for straightforward installation, they fit the renter-friendly approach we’re taking here.

Why I chose Tapo instead of adding another unrelated security product

This is where I think this particular setup becomes smarter than a typical under-$100 gadget roundup.

We aren’t buying one door sensor from one company, a motion sensor from another, a leak detector from a third and then discovering that they all need different apps, hubs or subscriptions.

The Tapo H100 gives us a starting point.

If you eventually want more sensors, you can expand the system instead of starting over. That could mean adding motion detection later, a water-leak sensor under the kitchen sink, or temperature and humidity monitoring in a bedroom.

You don’t need to buy any of those things today. That’s the whole point.

Your first $100 should solve today’s problems. It shouldn’t force you to pay for tomorrow’s gadgets.

You Don’t Need a Smart Speaker to Start

You may have noticed something missing from this setup. There isn’t an Echo Dot sitting in the basket. That’s intentional.

A smart speaker is convenient. If you already own an Alexa-compatible speaker, you can absolutely use it to control compatible lights and plugs by voice.

But I don’t think it deserves a place in our core $100 budget. Why spend part of a limited budget on a voice controller when the devices you’re buying can already be controlled through their apps?

If you already have an Echo, Google Home device or another compatible controller, great. Use it. If you don’t, you can add one later.

For a beginner building a smart home on a budget, I’d rather spend those dollars on something that actually adds another function to the apartment.

What This $100 Setup Can Actually Do

These three purchases work together. Imagine coming home in the evening.

A scheduled lamp comes on around the time you normally arrive. Your smart bulbs can provide softer lighting instead of forcing you to walk into a dark apartment and immediately switch on the brightest overhead light.

Your ordinary appliances and lamps can be scheduled through the smart plugs, while the Tapo sensors keep an eye on the entry points you’ve chosen.

At bedtime, the lighting can be adjusted without you having to walk around switching everything off manually.

And when you leave for a weekend, your lighting routines can continue running while the sensors provide another layer of awareness around the apartment.

None of this is revolutionary on its own. That’s actually the point. A useful smart home is often built from small conveniences that work together.

Where I’d Put Everything in a Small Apartment

One advantage of this setup is that it doesn’t require much physical space.

The smart plugs disappear behind the furniture or sit at the wall outlet. The bulbs live inside lamps you already own. The Tapo sensors sit discreetly on door and window frames, while the H100 hub can live on a small shelf, console or other existing surface.

That means you aren’t sacrificing valuable floor space just to make your apartment smarter.

I’d also resist the temptation to display everything together. You don’t need a little smart-home command center sitting on your dresser. Spread the devices out according to what they actually do.

The sensor belongs at the entry point. The bulb belongs in the lamp. The plug belongs where it can automate something useful.

In a small home, good technology should almost disappear into the background.

What I Would Automate First

If you’re starting from zero, don’t install everything and then try to figure out what to do with it. Start with the routines you’ll actually use.

Morning

A bedroom lamp could come on shortly before you normally wake up, giving you a gentler start than a sudden overhead light.

If you have another suitable device connected to a smart plug, you could also schedule it around your morning routine.

Coming Home

A living-room lamp can turn on around the time you usually arrive. This is particularly useful if your apartment gets dark before you get home.

Evening

You can create softer lighting for the evening without having to remember to adjust the bulbs every night.

If you’re interested in taking this further, our guide to Smart Bedroom Automation: 8 Things to Automate Before Bed goes deeper into nighttime routines without turning the bedroom into a complicated technology project.

Bedtime

Instead of walking around the apartment switching off lamps, you can schedule them or control them from your phone.

That sounds like a tiny convenience. It is. But tiny conveniences are exactly what make automation worth having in a small home.

Use the Security Sensors Selectively

The Tapo sensors don’t need to become a surveillance system. Despite what many smart-home articles tell you, you don’t need to buy a sensor for every door, window and cabinet because the products exist.

Think about your apartment first.

If you’re on the third floor and have no accessible balcony, your balcony door may not be your biggest concern.

If your bedroom window is easily accessible from a fire escape or adjacent structure, that may deserve more attention.

If you’re mainly interested in knowing when someone opens the front door, start there.

The best smart-home setup is not the one with the most sensors. It’s the one where every device has a clear job.

What About Motion Sensors?

You might wonder why I haven’t added a motion sensor to the $100 basket. The answer is simple: budget discipline.

The Tapo T100 for example is useful, but it requires the Tapo H100 hub. And that’s the norm with many motion sensors. A compatible hub is a requirement to function.

So anyway, because the T31 kit already gives us the H100, adding a T100 later makes much more sense than forcing it into the initial purchase.

Once you’ve lived with the setup for a while, you’ll know whether motion detection would actually improve your apartment.

Maybe you want a hallway light to turn on automatically at night. Maybe you’d like to know when someone enters a particular area. That’s when adding another sensor starts to make sense.

You’re expanding a system you already own rather than buying devices simply because a list told you to.

You Don’t Need to Spend the Full $100

This may sound strange in an article about building a smart home for under $100, but if the products are on sale and you can build the setup for less, stop spending.

You don’t get bonus points for reaching exactly $100.

If the three purchases solve the problems you actually care about, that’s enough. You can keep the remaining money for the next upgrade.

Maybe that means adding another smart plug. Maybe it means a motion sensor later. Maybe it means nothing at all.

What I Would Skip for a First $100 Smart Home

I would also skip several things that look tempting when you’re shopping.

I wouldn’t buy a camera just because every smart-home list seems to include one.

We already have a separate guide to Small Apartment Security: Smart Upgrades Without Drilling, and a camera only makes sense if being able to see what’s happening in your apartment solves a problem you actually have.

I wouldn’t buy a huge multi-device security kit either. It may look like a bargain because you get eight or ten pieces in one box, but if half of them don’t solve a problem in your apartment, they’re not really saving you money.

And I wouldn’t start buying smart appliances. You don’t need a smart coffee maker, smart fan and smart everything else to have a smart home.

Start with the things you already use every day.

What If I Already Own Some Smart Devices?

Then your $100 can go even further.

If you already have a smart speaker, you don’t need to buy another controller.

If you already have good lamps, the smart bulbs can make them smarter without replacing them.

If you already have smart plugs, you can put more of the budget toward sensors or another lighting upgrade.

And if you already have a compatible hub setup, adding more sensors becomes even more straightforward because you’re building onto equipment you already own.

This is why I prefer the idea of a starter smart home over a fixed shopping list. Your apartment and your existing devices determine what you should buy next.

The Best Smart Home for a Small Apartment Is the One You Actually Use

You don’t need a futuristic apartment. You don’t need ten different apps. And you certainly don’t need to spend hundreds of dollars before automation becomes useful.

With two smart plugs, two smart bulbs and a small sensor setup, you can cover several of the things that actually make a difference in a small apartment: lighting, everyday automation and basic entry-point awareness.

More importantly, you can stop there. If you love the setup, expand it later.

That’s how I’d approach smart home automation in a rental. Start with a few devices that solve real problems, keep them small and unobtrusive, and only add another device when you can explain exactly what you want it to do.

Your apartment doesn’t need more gadgets. It needs better automation.