5 Best Built-in Microwave Ovens for a Streamlined Look

Though we haven't conducted formal side-by-side tests of built-in microwaves, we have tested dozens of microwaves — including some built-ins. When we test microwaves, we analyze the functionality of each one by evaluating how evenly they melt cheese (pictured), "bake" four potatoes, reheat a large mac and cheese casserole and a dinner plate of meatloaf with sides. We use these results to inform our best built-in microwave picks.

We also test any available presets like the popcorn setting to see how well each microwave pops a bag of popcorn. We weigh any remaining unpopped kernels and assess any burning that occurred. We also test the defrost preset by defrosting a pound of frozen ground beef (in two different shapes). Throughout testing, we assess each model for ease of use specifically related to the control panel, positioning the turntable, opening and closing the door and cleaning the microwave.

If a microwave has added functionality as a toaster oven, convection oven or air fryer, we also put those features to the test by toasting bread, baking a cake or air frying chicken wings.

Once testing is complete, we tally all scores to see which microwaves performs the best. For any microwaves we haven't physically tested in our Labs — like many of the built-in models recommended on this list — our pros and expert editorial team lean on their collective decades of experience to assess available features, plus read hundreds of user reviews to see how the products perform according to those who use them on a daily basis.

Like any other kitchen appliance, there are lots of choices that may fit your space and style, but our pros recommend considering the following:

✔️ Type of built-in microwave: Built-in microwaves offer a streamlined and sophisticated look to your kitchen, because they're integrated — they're typically built into a cabinet or drawer or installed over the range. This not only frees up counter space, but also allows for further customization like installing the microwave at a comfortable height or near another appliance like a wall oven.

✔️ Type of microwave: There are two main types of microwaves, traditional and inverter. While traditional models tend to be more affordable, they can be less energy efficient because the microwave isn't kept at a constant power level while operating. Heating may also be spottier. Inverter microwaves can deliver more even heat, because they use a special technology to deliver power continuously rather than cycle power on and off they way traditional models do.

✔️ Size: The internal size of a microwave is measured in cubic feet and determines exactly how much can fit inside. Based on our research, microwaves are typically anywhere from 0.8 cubic feet to 2.2 cubic feet on average. Pick the size that best fits your space and needs.

✔️ Wattage: A very important spec, wattage indicates how powerful the microwave is. For most standard tasks — reheating individual portions of food, defrosting small quantities of vegetables or making popcorn — a 700- to 900-watt microwave will likely do the trick. For heavier use, look for a microwave with at least 1,000 watts of power. For reference, the heating instructions on most packaged frozen meals are based on a 1,100-watt microwave. Anything lower will eventually get the job done, but will take longer to heat through.

✔️ Features: Many of today's most popular microwaves — whether countertop or built-in — are packed with lots of great bells and whistles. These are some that stand out:

• Smart sensors measure the humidity level in your food and adjust the time and power level automatically. They do the hard work of calculating how much longer to add to the cooking time.
• Turntables rotate your food for more even cooking. Without one, it's necessary to stop the cooking cycle midway to turn your plate around. Look for removable ones, since they're much easier to clean.
• A plus-30-seconds button is a simple feature that adds a ton of convenience, since it allows you to perform a quick start or add more time without a second thought.
• Preset functions, like defrosting, come standard in modern microwaves, as does reheating and popcorn. If you want more guided cooking, look for additional presets like potato, beverage or melt, but note that too many presets can overcomplicate. Plus, this functionality tends to increase the cost of the microwave.
• Child safety locks on microwaves are a worthy feature if you have small children in your home, particularly on built-ins that can be easily accessed by little ones, like those installed low in a kitchen island. This feature "locks" the control panel, so kids can't operate it without help.

✔️ Installation: Countertop microwaves simply sit on your kitchen counters and are installed by plugging the unit into a nearby outlet. Built-in microwaves require more complex installation, since they're installed into a cabinet, drawer or wall. This requires adequate ventilation. You may also need to purchase a trim kit to insure a seamless built-in aesthetic. While you may be able to do all of this on your own, professional installation is often necessary.

Just like countertop microwaves, built-in microwaves vary in size — typically 24-inch, 27-inch and 30-inch widths. There are a variety of sizes represented in our picks, like the 24-inch best value pick or the 30-inch Whirlpool pick which aligns perfectly over a 30-inch range. Choose the size that best suits your space, and keep in mind that if you're not doing a full-scale renovation, you may need to choose a size that easily fits into an existing cabinet or drawer.

If countertop space is valuable to you, a built-in microwave affords you more space, since you won't have a large countertop microwave taking over. A built-in microwave is generally regarded as a sleeker, more sophisticated option, too. The downside: They're typically more expensive and installation tends to be more complicated.

“Built-in microwaves don't need to be vented (or exhausted) to the outdoors, as with a range hood," says Dan DiClerico, GH Home Improvement & Outdoor Director. "But they need adequate clearance on all sides to allow for proper circulation of air." The amount varies by make and model, but typical clearance requirements for a built-in microwave are between 1.5 and 3 inches.

Why not just stick a regular countertop model into an existing cabinet or drawer space? Sometimes this is possible; other times it's not advised. The answer depends on the specific model. Some countertop microwaves, like the Panasonic, can be, but it's important to consult the microwave’s user manual for specifics.

Eva Bleyer has professionally tested all kinds of kitchen equipment, from oven ranges to juicers to kitchen scales to blenders. Eva conducted the most recent side-by-side testing of 12 new microwave models in the Good Housekeeping Institute Kitchen Appliances & Innovation Lab. While Eva doesn't cook in a microwave everyday she loves the convenience of being able to quickly melt butter or make a personal mug cake in a microwave.

Brigitt Earley is a freelance writer and editor with over 15 years of experience at lifestyle publications like Real Simple, Oprah Daily and Apartment Therapy. She specializes in writing product review content in a wide range of coverage areas, including home, health and food. She also holds a degree in Professional Culinary Arts from the French Culinary Institute (now Institute of Culinary Education) and uses her own microwave multiple times each day to heat meals and snacks for her four children.