Verdict, analysis, and key features for each pick.
#1 Pick
Best Overall
Summit Appliance
Summit 24" Built-in Microwave with Trim Kit, Stainless Steel - SMBI24 | 1000W built-in microwave with stainless steel trim kit designed to fit 15 3/4" H x 22 1/2" W x 18 1/4" D wide cutouts
3.8(17)
Dependable performer with included trim kit, strong reviews, and quiet operation for standard built-in installations.
Ideal for: Homeowners seeking a straightforward built-in with included trim kit and proven reliability.
The Summit Appliance 24-inch microwave strikes a practical balance between price, performance, and ease of setup. It delivers 1000 watts of heating power into a spacious 1.2 cubic-foot interior, and the trim kit arrives in the box, so you won't face a separate purchase to achieve that seamless cabinet look. Owners consistently praise its quiet operation, even heating, and straightforward controls with preset functions for popcorn, pizza, and beverages.
One real consideration: some buyers report a visible gap (around an inch on each side) between the trim kit and cabinet, though most say it doesn't detract from the overall appearance and may be intentional for ventilation. The 30-second add button doubles as the start button, which a few users wish were separate to avoid premature wear. Still, the child lock disables permanently if you prefer, and the unit doesn't reset after power outages, features that matter to families who get frustrated with constant resets.
Compared to the Sharp drawer design, this takes a traditional approach, making it ideal if you want simplicity and don't need the aesthetic of a hidden microwave. It's a solid everyday workhorse for kitchens where cabinet space is fixed and you need reliable, no-fuss heating.
Pros
Includes stainless-steel trim kit and full mounting hardware
Quiet operation compared to most built-in models
Spacious 1.2 cu. ft. interior fits large plates and casseroles
Child lock can be disabled permanently if desired
Cons
Visible gaps between trim kit and cabinet sides reported
No convection function; microwave only
Key features
1000W microwave with 1.2 cu. ft. capacity for everyday heating
Pre-programmed functions for popcorn, pizza, beverages, and defrost
Included polished stainless-steel trim kit sized for 24-inch openings
Front-venting design allows flexible above-, below-, or over-range placement
Digital controls with 30-second add-time button and removable glass turntable
#2 Pick
Best for Frigidaire Loyalty
Frigidaire
24 in. 2.2 cu ft Electric Built-in Microwave in Black Stainless Steel with Sensor Cook
5.0(1)
Premium Frigidaire option with 2.2 cubic feet and sensor cooking, quieter than predecessors.
Ideal for: Frigidaire appliance owners replacing older built-ins who value consistency and larger capacity.
This Frigidaire 24-inch model appeals most to households already invested in the Frigidaire brand, particularly those replacing an older Galleria unit. The 2.2 cubic-foot capacity is notably larger than most compact 24-inch models, offering room for oversized casseroles and multiple plates at once. Buyers who've owned Frigidaire built-ins for years appreciate the familiar control layout and the dramatic reduction in operational noise compared to their previous units.
Sensor cooking automatically adjusts power and time based on moisture and heat detection, a convenience feature that removes guesswork from reheating and cooking frozen items. The stainless-steel finish pairs well with other Frigidaire Gallery appliances if you're building a cohesive suite. One potential friction point: the trim kit is sold separately, and buyers warn that sourcing replacement trim kits for Frigidaire models can be challenging and expensive. This is a major cost to factor in upfront.
Unlike the Gasland combination model, this stays pure microwave function, which suits cooks who don't need convection or broiling. If you already own Frigidaire appliances and like the ecosystem, this is the logical choice, though budget for the trim kit purchase as a separate line item.
Pros
2.2 cu. ft. capacity larger than most 24-inch competitors
Sensor cook technology adjusts power automatically for even results
Significantly quieter operation than older Frigidaire models
Stainless finish coordinates with Frigidaire Gallery suite
Cons
Trim kit sold separately and can be difficult to source
Limited customer feedback (only one detailed review available)
Key features
2.2 cu. ft. interior for large dishes and family-sized portions
Sensor cooking technology detects moisture and adjusts power automatically
Stainless-steel finish blends with Frigidaire Gallery appliances
Standard mount and flush-mount cutout options for flexible installation
Bright LED display and intuitive control interface
#3 Pick
Best Drawer Design
Sharp
Sharp SMD2470ASY 24 in. 1.2 cu. ft. Built-In Microwave Drawer Oven | 1.2 Cubic Feet, 950 Watt, Concealed Control Panel, Digital LCD Display
4.3(1,006)
Premium drawer microwave with hidden controls, smooth automation, and flexible placement; costly but distinctive.
Ideal for: Design-conscious cooks with island or under-counter space who prioritize clean aesthetics and ergonomic access.
The Sharp microwave drawer reimagines the category by eliminating the traditional front-facing door and tucking the control panel away until you need it. The drawer slides open smoothly and closes with a soft touch, then you push again or nudge it gently shut, making it intuitive even for children and seniors. The hidden controls tilt up at 45 degrees when you open the drawer, so they're never visible when the unit is closed, a design win for kitchens where aesthetics matter as much as function.
With over 1,000 customer reviews and a 4.3 rating, this model has substantial real-world validation. Owners love the compact footprint beneath islands, peninsulas, or standard cabinetry, and many note it reduces prep and cleanup time by bringing the microwave closer to the workspace. The 1.2 cubic-foot capacity is smaller than the Frigidaire's 2.2, but it still accommodates standard cookware.
The trade-off is cost and a history of isolated arcing defects (electrical sparking inside the unit) that appeared in a small number of units after warranty expiration. Sharp's warranty and support process has improved, and the company replaced affected units even outside the standard window, but this remains a documented risk. Compared to the Gasland combo model, this pure microwave drawer costs more but offers superior design integration if your kitchen layout suits under-counter placement.
Pros
Drawer design with hidden controls keeps kitchen looking seamless
Automatic opening and soft-close mechanism adds convenience and safety
Over 1,000 reviews provide strong real-world usage validation
Flexible installation below islands, peninsulas, or standard cabinetry
Cons
Premium pricing higher than traditional built-ins
Isolated reports of internal arcing defect require warranty awareness
Key features
Drawer microwave with automatic smooth-glide opening and soft close
1.2 cu. ft. capacity fits 4 qt. casseroles and large beverages
Concealed 45-degree tilt control panel appears only when needed
950 watts power with preset functions for common cooking tasks
Can be installed below islands, under counters, or beneath wall ovens
#4 Pick
Best Combination Unit
Gasland
Gasland 24 Inch Built in microwave oven, 1.6 Cu. Ft, 1000W, 11 Levels | Microwave and Convection Oven Combination with Sensor Cook, Touch Control, LCD Display, Stainless Steel
4.2(509)
2-in-1 microwave and convection oven with robust 3D heating; powerful but learning curve on settings.
Ideal for: Cooks seeking microwave and convection capability in one unit for roasting, browning, and versatile cooking.
The Gasland 24-inch built-in stands out as a true dual-function microwave and convection oven in a single 24-inch drawer, giving you two appliances' worth of capability. The 1.6 cubic-foot capacity sits between the compact Sharp and the roomier Frigidaire, and the convection system circulates heat evenly for browning and roasting that a pure microwave cannot achieve. One-touch presets for popcorn, pizza, sensor reheat, and defrost simplify everyday use, while the soft-close drawer and cool-door technology add safety and quiet operation.
Owners who embrace the convection function report excellent results on steaks, roasts, and baked goods, expanding what a built-in can do. The 11 power levels give granular control for different cooking tasks. However, the learning curve is real: the number of settings and the dual functionality mean reading the manual carefully, and some users struggled with initial setup or understanding which mode to select for specific foods. One reviewer experienced a defective unit on arrival but praised Gasland's response in replacing it beyond the standard return window.
Compared to the Sharp drawer, this adds convection, which broadens cooking versatility but increases complexity. If you cook beyond simple reheating and want one appliance to handle pizza, frozen entrees, and light roasting, the combo power justifies the cost. But if you microwave only, this extra feature may go unused.
Pros
Microwave and convection oven in single 24-inch drawer
3D convection heating spreads warm air evenly and reduces cold spots
Soft-close drawer and cool-door design enhance safety and quietness
Eight one-touch auto-cook programs for common meal types
Cons
Complex settings require careful manual reading and practice
Isolated reports of defective units on arrival need inspection before installation
Key features
Dual microwave and convection oven function with 1.6 cu. ft. capacity
11 microwave power levels for precise heating control
3D convection system for even browning and baking results
One-touch sensor cook, reheat, defrost, and menu presets
Soft-close drawer and triple-layer tempered glass door with cool exterior
#5 Pick
Best Capacity
Frigidaire
Frigidaire Gallery Series GMBS3068BF 2.2 cu. ft. Built-in Microwave Oven, Trim Kit Sold Separately
4.3(252)
Roomiest 24-inch option with 2.2 cu. ft., sensor cooking, and white LED lighting; trim kit sold separately.
Ideal for: Households needing maximum microwave capacity for large dishes and those already embedded in Frigidaire Gallery ecosystem.
The Frigidaire Gallery 2.2 cu. ft. model shares capacity with the earlier Frigidaire entry but operates as a distinct product line with its own sensor and control system. The 2.2 cubic-foot interior is the largest in this 24-inch lineup, a meaningful advantage if you regularly heat oversized casseroles, multiple plates, or large leftovers. One owner who upgraded from a 2.0 cu. ft. model noted the extra space was immediately noticeable and welcomed. The white LED interior light is brighter and cleaner than the yellowish tone of older units, improving visibility when loading and unloading food.
Sensor cooking automatically determines power and duration, and the quiet operation is a consistent strength versus older generations. Installation requires some care: the feet spacing on this newer unit differs from older Gallery models, so if you're reusing an old trim kit, plan to bend the mounting rails and adjust with screws. Some owners report the door sits slightly taller and may rub the trim until fastened correctly. One early failure (internal sparking at 16 months, outside warranty) highlights that no unit is immune to manufacturing defects, though this remains rare.
Where this Frigidaire diverges from the Gasland combination model is function: pure microwave versus dual heating. If your primary need is maximum microwave capacity without the complexity of convection settings, this delivers. But the trim kit purchase and adjustment work needed to retrofit older cabinets add labor and cost.
Pros
Largest 24-inch microwave capacity at 2.2 cu. ft.
Sensor cooking automates power and time for consistent results
Bright white LED interior light improves visibility
Noticeably quieter than previous-generation Frigidaire units
Cons
Trim kit sold separately and may require adjustment to fit older cabinets
Isolated report of internal arcing defect outside one-year warranty window
Key features
2.2 cu. ft. interior capacity largest among 24-inch built-in options
Sensor cooking technology adjusts power and time automatically
Stainless-steel finish designed to match Frigidaire Gallery appliances
Supports standard and flush-mount cutout configurations
Bright white LED display and user-friendly preset functions
How to Choose a 24-Inch Built-In Microwave
Four trade-offs that actually matter when matching a 24 inch built in microwave to your kitchen.
Cabinet Space and Trim Kit Compatibility
Before selecting any built-in model, measure your cutout dimensions carefully: width, height, and depth. Most 24-inch microwaves need roughly 15–16 inches of height and 18–19 inches of depth, but some models vary. The built-in microwave installation guide walks through standard versus flush-mount cutouts and how to assess your cabinet's readiness. Check whether the trim kit is included (Summit includes one. Frigidaire models do not). If buying without trim, plan for an additional cost and verify the kit will fit your cabinet's aesthetic. Older kitchen cabinets may require adjustment of mounting rails or shims to align doors and trim properly.
Capacity and Cooking Volume
Capacity ranges from 1.2 to 2.2 cubic feet in this lineup. A 1.2 cu. ft. unit (Summit, Sharp) handles everyday plates and most casserole dishes but may feel tight for large family meals or multiple items at once. A 2.2 cu. ft. unit (Frigidaire models) accommodates oversized cookware and is a comfort upgrade if you frequently reheat big portions. The Gasland combo's 1.6 cu. ft. sits in the middle. Measure the cookware you heat most often and compare it to the interior dimensions listed in the product specs to ensure a comfortable fit.
Microwave-Only Versus Convection Combination
Most models in this guide heat via microwave radiation alone, which is fast and efficient for reheating and cooking frozen foods. The Gasland unit adds convection heating, which circulates hot air for browning, roasting, and baking. Convection is powerful but adds complexity and cost. If you mainly reheat leftovers and warm beverages, microwave-only is simpler. If you want to brown steaks, bake casseroles, or cook frozen entrees with a crispy exterior, convection capability justifies the learning curve. Weigh your actual cooking habits against the control panel complexity.
Placement and Design Aesthetics
Traditional built-ins (Summit, Frigidaire models) mount above or below cabinetry or over a wall oven, with a visible microwave face and trim kit. Drawer models (Sharp) slide beneath islands, peninsulas, or standard cabinetry, hiding the microwave and control panel when closed, which suits open-concept kitchens and reduces visual clutter. The Sharp drawer costs more and requires under-counter space, but offers a distinctive, seamless kitchen appearance. Built-in versus over-the-range placement depends on your layout; if you have a fixed 24-inch cabinet opening, a traditional built-in fits; if you prefer countertop space and can modify cabinetry, a drawer is worth the investment.
Warranty and Brand Support
All five models come with a standard one-year warranty covering defects. Frigidaire and Gasland have established support teams and have been noted for replacing units outside the warranty window when manufacturing defects occurred. Sharp's support has improved its response to warranty claims, though isolated arcing issues have been documented. Summit, as a smaller appliance brand, has fewer customer reviews online but rates well among those who purchase. If extended warranty coverage is available through the retailer or a third-party provider like Asurion, it may be worthwhile given the built-in cost.
Frequently asked
Quick answers to the questions readers ask most.
What's the difference between a 24-inch built-in and over-the-range microwave?
A 24-inch built-in fits into a cabinet opening (above, below, or beside other appliances) and uses a trim kit for a seamless look. An over-the-range sits directly above the cooktop and vents cooking odors. Built-in microwaves offer more flexible placement and a cohesive design; over-the-range saves cabinet space but limits where you can put it. Your kitchen layout and whether you already have a cabinet opening will determine which suits you best.
Do I need to buy the trim kit separately?
Not always. Summit includes a stainless-steel trim kit in the box, ready to install. Frigidaire models (both the 2.2 cu. ft. options in this guide) sell the trim kit separately, which is an additional cost and can be hard to source. Check the product listing before purchase to confirm what's included. If you're replacing an older built-in, you may be able to reuse the old trim kit, but verify dimensions first.
Can a built-in microwave go in a drawer under the counter?
Yes, if it's designed as a drawer microwave, like the Sharp model in this guide. Drawer microwaves slide open and close horizontally, making them ideal for islands, peninsulas, or beneath cabinetry. Traditional built-ins with front-facing doors require vertical clearance above or below and are not suitable for drawer-style installation. If you want under-counter placement, choose a drawer model; otherwise, confirm your cabinet cutout orientation.
How much does installation typically cost?
Installation by a professional electrician or contractor typically costs between one and three hundred dollars, depending on whether you're replacing an existing unit or building new cabinetry. If the cabinet is already cut and wired, installation is quicker. If the electrician must run new circuits or modify the cabinet, costs rise. Some retailers offer installation as part of the purchase; ask before buying. The trim kit may also require additional labor if it needs adjustment to fit your cabinet.
What's the difference between sensor cooking and manual microwave settings?
Sensor cooking (available on Frigidaire and Gasland models) uses moisture and heat detection inside the microwave to automatically adjust power and cooking time, then stops when the food reaches the target temperature. Manual settings require you to select power level and time yourself. Sensor cooking removes guesswork and is convenient for defrosting and reheating, but it's not foolproof and some foods cook unevenly if they're dense or oddly shaped. Manual control offers more precision if you know your appliance well.