How to Choose the Right Built-in Microwave

Why Choose a Built-in Microwave?

A built-in microwave is installed directly into your kitchen cabinetry, wall, or a purpose-built niche, sitting flush with surrounding surfaces for a clean, integrated look. Unlike a freestanding countertop microwave, a built-in model frees up bench space and becomes a permanent part of your kitchen design. They're a popular choice in kitchen renovations and new builds where a seamless, professional finish is a priority.

This guide covers what to look for in a built-in microwave and how to plan your installation correctly. You can compare all microwave types in our complete microwave buying guide.

Built-in vs. Countertop Microwaves

The primary difference between built-in and countertop microwaves is how they're installed and ventilated. Countertop microwaves sit on a bench and vent from the top and rear. Built-in models are designed to vent from the front (since the other sides are enclosed by cabinetry). Not all countertop microwaves can be used as built-ins: a purpose-designed built-in model or a countertop model with an appropriate trim kit is required for cabinet installation.

Trim Kits

A trim kit is a stainless steel or matching-finish frame that surrounds the microwave within the cabinet opening, giving it a professional flush-mount appearance. Some microwaves are sold as complete built-in units. Others are countertop models that require a separately purchased trim kit for built-in installation. If you're buying a trim kit separately, confirm it's compatible with your specific microwave model before purchasing.

Key Features to Look For

Capacity

Built-in microwave capacity is measured in litres. As a guide:

• 20 to 25 litres: Suitable for a single person, couple, or a secondary kitchen microwave for reheating and simple tasks.
• 26 to 32 litres: Suitable for a family and handles most everyday microwave cooking tasks.
• 33 litres and above: Large capacity suitable for bigger families or anyone who regularly uses the microwave for cooking larger dishes.

Wattage (Power Output)

Microwave wattage determines how quickly and evenly food heats. Higher wattage means faster, more even results.

• 700 to 900 watts: Suitable for reheating and basic cooking tasks.
• 1,000 to 1,200 watts: Better for faster reheating and more even cooking across a wider range of foods.

Cooking Functions

Beyond basic microwave heating, look for:

• Grill function: Uses a grill element inside the microwave to brown and crisp food. Useful for dishes that benefit from a browned surface.
• Combination (convection) mode: Combines microwave and convection oven functions to cook and brown simultaneously. If you want your built-in microwave to double as a secondary oven for baking and roasting, a combination model is worth the upgrade. See our range of combination microwave ovens.
• Inverter technology: Delivers continuous power at lower wattage levels rather than cycling on and off, which produces more even reheating and better results for delicate foods.
• Sensor cooking: Automatically adjusts cooking time and power level based on steam emitted from the food. Reduces guesswork and prevents overcooking.

Control Type

Built-in microwaves use either dial controls or touch controls. Touch controls are easier to wipe clean and have a more contemporary look. Dial controls are more intuitive for some users and easier to operate by feel.

Interior Material

Stainless steel interiors are durable and easy to clean. Ceramic enamel interiors are also easy to clean and scratch-resistant. Both are suitable for everyday use.

Door Opening Direction

Most microwaves open with a handle on the right side (hinged on the left). Check the door swing direction before purchasing to confirm it suits your cabinet placement and kitchen workflow.

Planning Your Installation

Cabinet Opening Size

Built-in microwaves require a precise cabinet opening to sit correctly. The required opening dimensions are specified in the product documentation. Have your cabinetmaker or builder create the opening before purchasing if possible, or confirm the cabinet dimensions match the microwave requirements.

Ventilation

Built-in microwaves vent from the front face of the unit. Ensure there's adequate clearance around the unit as specified in the installation guide. Blocking the ventilation of a built-in microwave can affect performance and longevity.

Electrical Requirements

Most built-in microwaves plug into a standard 10-amp power outlet inside the cabinet. Confirm there's a power outlet inside or at the rear of the cabinet opening before installation.

What to Expect at Different Price Points

Budget (Under $500)

Entry-level built-in microwaves deliver reliable performance for reheating and basic microwave cooking. Expect standard wattage, basic cooking presets, and a standard stainless steel finish.

Mid-Range ($500 to $1,200)

Mid-range models offer higher wattage, inverter technology, grill functions, sensor cooking, and better interior finishes. Most households will find an excellent model in this range.

Premium ($1,200 and Above)

Premium built-in microwaves include combination convection modes, advanced sensor cooking, large capacity, and a refined look that integrates seamlessly with high-end cabinetry.

Frequently Asked Questions

Can any microwave be built in?

Not directly. A standard countertop microwave vents from the top and rear and is not designed for enclosed cabinet installation. A purpose-built built-in microwave or a countertop model with a compatible trim kit is required. Always confirm the model is approved for built-in installation before purchasing.

How do I clean a built-in microwave interior?

Wipe the interior walls and turntable with a damp cloth after each use. For stubborn spills, heat a bowl of water with a squeeze of lemon juice in the microwave for two to three minutes. The steam softens food residue, making it easier to wipe away. Avoid abrasive scourers that can damage the interior coating.

Ready to Shop?

Browse our full range of built-in microwaves and combination microwave ovens. You can also explore our complete microwaves range and full kitchen appliance collection.