TV Wall Box: Recessed Outlet Behind a Mounted TV

Mount a TV flat against the wall and you quickly discover the problem: the power plug and HDMI connectors stick out 2 inches or more, pushing the screen away from the wall and leaving cords dangling. A tv wall box solves that by recessing the outlet and cable connections into the wall cavity, so plugs sit flush and the TV hangs tight to the surface.

The short answer: a TV wall box is a recessed electrical and/or low-voltage box installed in the drywall behind the TV. The power side is line-voltage electrical work, which in most places means a licensed electrician and possibly a permit. The low-voltage side for HDMI, coax and network cables is simpler and often a homeowner project. What you must never do is run the TV power cord or an extension cord through the wall to reach an outlet below.

This guide explains the types of recessed boxes, the code rules behind them, how the install works, typical costs, and when the job belongs to an electrician.

What a TV Wall Box Does and Why It Matters

A standard outlet leaves the plug protruding. Behind a low-profile mount with only 1 to 2 inches of clearance, that plug either bends the cord sharply or keeps the screen from sitting flat. A tv wall box moves the face of the receptacle back into the wall by 1 to 2 inches, giving space for the plug, a right-angle adapter or a surge protector plug.

These boxes also give a clean pass-through for cables. Instead of a visible bundle of wires, you get a tidy opening that feeds low-voltage cables down inside the wall to a media console. Many people search for an in wall cable concealer or a way to hide cable box clutter; a recessed box paired with a matching low-voltage plate lower on the wall is the clean, code-friendly version of that idea.

Types of Recessed Boxes

Recessed power boxes

A single- or double-gang electrical box set deeper than normal, with a receptacle mounted at the back of a recessed trim. These are line-voltage devices and must be installed like any other outlet: connected to a proper circuit, secured to framing or with listed old-work clamps, and covered with the correct plate.

Low-voltage media boxes

Recessed plates or brush-style openings for HDMI, optical, coax and Ethernet. They carry no line voltage and use low-voltage mounting brackets.

Combination boxes

A recessed tv media box that combines a power receptacle and a separate low-voltage compartment, separated by a divider. The divider matters: code requires line-voltage and low-voltage conductors to be separated within the box.

In-wall power kits

Listed kits connect an upper recessed inlet behind the TV to a lower outlet box using in-wall rated cable. They are designed for this exact purpose, and some are sold for homeowner installation where local rules allow. Follow the kit instructions and local code closely.

Code Rules You Need to Know

• No cords in walls. TV power cords, extension cords and power strip cords are not rated for concealed use inside wall cavities. Running them there is a code violation and a fire risk.
• Use rated cable. Line-voltage wiring inside walls must be proper building wire (such as NM cable) installed by approved methods, or a listed in-wall power kit.
• Separate voltages. Keep HDMI and network cables apart from line-voltage wiring or use a divided box.
• In-wall rated low-voltage cable. Look for CL2 or CL3 markings on HDMI and speaker cables that run inside walls.
• Box fill and support. Boxes must be sized for the conductors and secured properly. An electrician or inspector will check these details.
• Permits. Many jurisdictions require a permit for new outlets or extending a circuit. Check with your local building department.

Tools and Materials

• Stud finder with wire detection and a level
• Drywall saw and a pencil
• Recessed box or kit sized for your needs
• In-wall rated low-voltage cables
• Fish tape or glow rods for pulling cables
• Non-contact voltage tester
• Safety glasses and a dust mask

How Installation Works

Here is the typical sequence. The low-voltage portion is often DIY-friendly; the line-voltage portion is for a licensed electrician unless you are using a listed kit and your local rules permit homeowner work.

1. Plan the location. Mark the TV mount position first, then place the recessed box where the TV will cover it but where it will not collide with the mount’s wall plate. Keep it between studs.
2. Check the cavity. Scan for studs, pipes, ducts and wires. Before cutting near any existing outlet or switch, turn off the breaker and confirm power is off with a non-contact voltage tester. Never work inside a box or cavity with live wiring.
3. Cut the opening. Trace the template supplied with the box and cut with a drywall saw, keeping the blade shallow.
4. Route low-voltage cables. Fish HDMI and network cables from the upper opening down to a lower low-voltage plate near the console.
5. Power connection. The electrician connects the recessed receptacle to an existing circuit or installs a new one, secures the box, and verifies the circuit with power off during connections. If using a listed in-wall power kit, follow its steps exactly.
6. Install trims and test. Attach cover plates, restore power, plug in the TV and confirm everything works before hanging the screen.

Hiding a Cable Box or Streaming Device

A cable box wall mount or small bracket behind the TV keeps the set-top device out of sight. Make sure it has ventilation, since these boxes run warm, and that the remote can still reach it (an IR repeater helps). Plug it into the recessed receptacle or a surge protector connected there, never into an extension cord threaded through the wall.

Choosing the Right Recessed Box

Start with the mount. A fixed low-profile mount leaves the least clearance, so it benefits most from a deeper recess. A full-motion arm has more space behind the screen but moves, so cables need a little slack and the box must sit where the arm will not strike it when folded. Next, count what you need to plug in: the TV itself, perhaps a soundbar, a streaming stick or a small cable box. A two-receptacle recessed box or a combination unit handles more devices without a power strip dangling behind the screen. Finally, consider the lower end. The cleanest setup pairs the upper recessed box with a matching low-voltage plate behind the console, so every cable disappears between them.

Troubleshooting

Plug still hits the TV. Use a right-angle or flat plug, or a deeper recessed box.

Mount plate covers the box. Reposition the box before cutting; once installed it is hard to move.

Buzzing or picture interference. Low-voltage cables may be too close to power wiring. Separate them or use a divided box.

Breaker trips after install. Stop using the outlet and have the electrician check the connection; do not investigate live wiring yourself.

Cost Ranges

Low-voltage recessed plates usually cost roughly $10 to $40. Recessed power boxes and combination boxes often run about $15 to $60. Listed in-wall power kits generally range from around $50 to $150. Having an electrician install a recessed outlet behind a TV commonly costs a few hundred dollars, more if a new circuit, permit or drywall patching is needed.

When to Call a Licensed Professional

Call a licensed electrician for any new recessed outlet, circuit extension or change to existing wiring. They will handle permits where required, choose the right cable and box, and make the connections safely. Hire a professional too if the wall contains fire blocking, masonry, or plaster over lath, or if the home was built before 1978 and you plan to cut painted plaster (test for lead first). A drywall pro can patch and finish any openings if plans change.