Under Counter Electrical Box for Tight Kitchen Spaces

I test shallow-cabinet wiring setups for DIYers. This under counter electrical box fits standard 35mm boxes without drilling through countertops.

By Avery Quinn · Beauty, kids, and pets editor · Kids, pets, and skin · Gadget Evaluator Lab

Avery's caution. This under counter electrical box holds standard 35mm boxes in shallow cabinets. It avoids drilling through countertops during installation.

I am Avery Quinn, covering DIY electrical setups for tight kitchen spaces. This page focuses on under counter electrical boxes that fit standard 35mm units into shallow cabinets without requiring countertop drilling.

Check the product photo for the box depth and mounting flange size. Verify the listing title confirms compatibility with standard 35mm boxes before you proceed.

Check age, size, and small parts on the listing before this goes in a bag.

1-Gang New Work Outlet Box, PVC Electrical Box for Switch, GFCI…

This listing specifies a 22 cubic inch capacity, which is a significant volume for a single gang unit, and the title explicitly notes it is a New Work box. That designation means it is designed for installation during new construction or major renovation where the stud bay is open, rather than for retrofitting into an existing finished wall.

Check the product photo for the mounting flange and screw holes; New Work boxes typically have a wider flange that sits against the stud face. If your cabinet is shallow and you are trying to avoid drilling through the countertop, this box may protrude too far into the cabinet space unless you have the specific clearance for a 22 cubic inch depth.

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Newhouse Hardware 1-Gang PVC Old Work Electrical Outlet Box (1-pack)

The title identifies this as a 14 cubic inch PVC Old Work box, which is a standard size for retrofitting into existing walls. The material is plastic, which is lighter than metal but requires careful handling to avoid cracking during the knockout removal process for your cables.

Look closely at the photo to see the shape of the mounting tabs; Old Work boxes have a specific flange design that clamps into the wall opening. Verify that the depth shown in the image does not exceed your cabinet's internal clearance, as PVC boxes can be bulkier than their metal counterparts when fully assembled.

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UL Listed 4-Inch Round Shallow Electrical Box

This is a 4-inch round metal box with a 1/2-inch depth, explicitly labeled as a shallow or pancake junction box. The metal construction provides a rigid base, and the round shape is distinct from the rectangular gang boxes, making it suitable for specific fixture types rather than standard duplex outlets.

In the product photo, verify the diameter and the depth of the mounting flange. Because it is only 1/2-inch deep, it is ideal for shallow spaces, but you must ensure the 4-inch round opening matches your cabinet cutout or that you are using it for a ceiling light fixture where the round shape is acceptable.

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SmarToggle Four Gang Retrofit Wall Box

The title specifies a Four Gang box with a 1-1/2 inch toggle depth, designed for quad devices like smart switches. The 1-1/2 inch depth is a key measurement for shallow installations, allowing it to fit into tighter spaces than standard deep boxes while still accommodating multiple devices.

Examine the photo for the toggle mechanism and the mounting tabs. This box is designed for stud or no-stud mount, so check if the toggle arms are visible and if the flange width matches your cabinet's available space. The quad capacity means it is wider than a single gang box, so ensure your shallow cabinet has the horizontal room for four devices.

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Sigma Engineered Solutions 14250 Metal Electrical Outlet Box…

This is a metal electrical outlet box with a weatherproof design, featuring three 1/2-inch knockouts. The metal construction is durable, and the weatherproof aspect suggests it is intended for exterior or damp locations, which may not be necessary for an interior cabinet but adds to the box's overall bulk.

Look at the photo to see the shape of the box and the placement of the knockouts. The weatherproof cover mentioned in the title may add extra depth, so measure the total depth including the cover. If your cabinet is shallow, this box might be too deep or bulky for a standard interior installation without modification.

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2 Gang Old Work Electrical Outlet Box

The title lists a 26 cubic inch capacity for a 2-gang box, which is a larger volume than the standard 14 or 20 cubic inch boxes. This extra space is useful for bulky smart switches or multiple cables, but it also means the box is deeper and wider than a single gang unit.

Check the product photo for the overall dimensions and the mounting flange. A 26 cubic inch box will have a significant depth, so if your cabinet is shallow, you may not have enough clearance for the box to sit flush against the back wall. Ensure the width fits your cabinet's horizontal space as well.

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LEONLITE 12-Pack 20 Cubic Inch Single Gang Old Work Electrical…

This is a 12-pack of 20 cubic inch single gang Old Work boxes. The 20 cubic inch capacity is a step up from the standard 14 cubic inch box, providing more room for cables and devices. The bulk packaging suggests it is intended for multiple installations or for buyers who want to have spares on hand.

In the photo, verify the depth of the box and the design of the mounting tabs. The 20 cubic inch size is deeper than the 14 cubic inch standard, so check if your shallow cabinet can accommodate this extra depth. The Old Work design means it is for retrofitting, so ensure the flange clamps securely into your wall opening.

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LEONLITE 12-Pack 14 Cubic Inch Single Gang Old Work Electrical…

The title specifies a 14 cubic inch capacity for these single gang Old Work boxes, which is the standard size for most residential outlets. The 12-pack format is cost-effective for multiple installations, and the Old Work designation indicates it is for retrofitting into existing walls.

Look at the photo to see the depth and the mounting flange. The 14 cubic inch size is shallower than the 20 cubic inch box, making it a better fit for shallow cabinets. Verify that the flange width matches your cabinet's available space and that the depth does not protrude too far into the cabinet interior.

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2Pcs Recessed Outlet Box, DBHR1C Low Profile Electrical Outlet Box…

This listing describes a low profile electrical outlet box with a weatherproof cover, designed for flat surface retrofit construction. The low profile design is ideal for shallow spaces, and the weatherproof cover adds an extra layer of protection, though it may add to the overall depth.

Check the product photo for the depth of the box and the cover. The low profile design should fit into shallow cabinets, but the weatherproof cover may protrude slightly. Ensure the total depth, including the cover, fits within your cabinet's clearance. The flat surface retrofit design means it is intended for installation on existing walls, so verify the mounting mechanism is compatible with your cabinet structure.

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