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How to Install
Small Wall Safe

A small wall safe is a convenient, affordable way to securely hide valuables in your home. It will allow you to store cash, jewelry, guns, documents, and many other small items.

Small Wall Safe Installation

Safes are available in many styles including box safe, in floor safe, freestanding gun vaults, and more. Safes can even be "bugged" with alarm contacts as part of a custom security system.

This page will focus on a small, key-operated in wall safe costing under $50. If you’re fairly handy, installing a safe like this is a great do-it-yourself project.

Much of this page would also apply to other types of small safe, even those using biometric or fingerprint locks.

This particular wall safe measures roughly 14” by 8-1/2” inside, with a front flange measuring 17” by 11”. The width of 14-inches is standard for this type of safe, and isn’t chosen at random. In residential construction, wall studs are usually spaced 16” apart, center-to-center. This leaves a space of about 14”, which allows installing the wall safe between studs.

Some walls will have studs spaced 24” apart; in that case, a short section of 2x4 can be used as a brace (more on that later.)

Making a Template for the Safe

Unless your wall safe came with a template, make one yourself by tracing the outline of the storage compartment onto a piece of cardboard. Notice that this is not the front flange of the safe, but the part that will be recessed into the wall.

Making a wall safe template

Cut out the template; it will be used to help choose a location for the safe, as well as to mark an outline for cutting the opening.

Choosing a Location for a Small Wall Safe

Wall safes for the home should be installed where they are hidden or slightly concealed, but still easily accessible. Good choices for hidden wall safes are in bedroom closets and behind doors. And of course, if it’s convenient to do so, you can hide a wall safe behind a picture or painting.

Use your template to “test” possible locations for the safe. Remember to allow an inch or two around the template for the front flange of the safe.

Avoid locating a safe in “public” areas, such as a living room or kitchen. These areas are accessible to any visitors you might have, and would make the location obvious if you had to access it while they were present.

Also, check the door swing of the safe you plan to install. Make sure you have clear access to the inside of the safe when the door is swung open. If the location is behind a door or in a tight corner and limits your access, you may be able to simply flip the safe upside down to reverse the door swing. Many safes have internal shelves that will work in either orientation.

Check clearance carefully, as described below, before marking or cutting the opening to full size.

If you do encounter an obstacle, patch the hole with drywall Spackle and choose another location.

Tools required:

  • Metal coat hanger or other piece of stiff wire
  • Small screwdriver 
  • Pencil
  • Torpedo level
  • Drywall saw
  • Drill and wood bits
  • Socket wrench set

Tools required for wall safe installation

Checking for clearance

When you’ve picked a likely spot for your safe, find the approximate location of the studs by knocking on the wall with your knuckles. As you rap continuously, move back and forth across the wall. You should hear a slight change in pitch as you move from a stud to a hollow area.

Next, use a small screwdriver to poke a hole through the drywall in the approximate center of the intended wall safe location.

Poke hole in drywall, in approximate center

If the space behind the drywall is hollow, run the screwdriver back into the hole in all four directions. Try to keep the opening in the drywall as small as practical.

If the screwdriver hits a stud, poke holes at very sharp angles to both the left and right. You should hit open space on one side or the other of a single 2x4 stud. When you find the open side, check to see if placing the safe on that side of the stud will work as a good location. 

If so, make another test hole in the approximate center of the new location, and go to the next step. If not, you’ll need to find another location to install the safe.

Next, insert the wire into the hole, aiming it to the left. As the wire hits the stud inside the wall cavity, hold your thumb to mark the point on the wire where it stops.

Insert wire and measure to the left

Pull the wire out, and lay it against the wall to the left. Line up your thumb to the hole, and make a small pencil mark at the end of the wire. This is (approximately) the edge of the left stud.

Mark left stud location with a pencil

Repeat these steps for the right side. You now know about where the edges of both studs are. Measure this length; it should be about 14” if the studs are spaced the “standard” 16-inches on centers.

Assuming the space is 14” wide or so, repeat the wire measuring both upwards and downwards. In most cases, the wall cavity will be wide open for several feet vertically. If you encounter a block or other obstruction, you can usually just fudge the safe location up or down to avoid it.

If all is well, proceed to the next step, “Cutting the Hole”. If not, you’ll have to find a different spot to install the safe.

Cutting the Hole

First, make sure the template fits easily between the two stud markings. Then, use the drywall saw to cut up to the stud on one side or the other. In this example, we’ll cut to the left stud.

Test fitting template between studs

Make a cut to the left stud

Place the template against the wall, lining up the left side with the edge of the stud. Level the template, and trace the outline of the small wall safe template onto the drywall.

Marking outline with template

Cut the opening out using the drywall saw, cutting slightly outside the pencil line. This will allow a little extra wiggle room for installing the small wall safe.

Cutting hole, starting left up

With the hole cut, test-fit the safe into the opening. If it’s a little tight, shave away the offending edges with the saw.

Opening cut out for wall safe, with small gap to be shimmed

Depending on the framing, there may be a gap between the hole and the right-hand stud. A small wall safe should be closely supported on both sides, so we need to provide something solid to take up this space.

 In case of a small gap, use shims or scraps of plywood to fill in the space. Shims can be screwed to the stud, and stacked as needed to build out the wood until it’s even with the edge of the opening.

Small gap, shimmed with scrap plywood

Some homes will have walls with studs spaced at 24” on-centers. In that case, obtain a piece of 2x4 stock slightly shorter than the width of the safe opening. Position this inside the opening to act as a brace for the right side. To make this easier, temporarily drive a long screw into the brace to act as a handle.

Opening cut, with large gap

Brace being positioned using screw for handle

Brace screwed in place

Use drywall screws to hold the brace in place, making sure to “sink” the heads slightly below the surface of the wall. When the safe is installed, the outer flange will hide these screws.

Installing the Small Wall Safe

Once the safe fits fully into the opening, mark the studs for the mounting screw locations. Remove the safe, and drill the holes using a twist drill bit to match the mounting screws. If you’re installing a wall safe didn’t include hardware, use ¼” lag screws, at least 2” in length.

Drill mounting holes with a ¼” drill bit (or whatever size matches the shank of the crews you have.)

Install safe into opening and marking holes

Position the small wall safe in the opening, install the screws, and tighten them most of the way down. Check the safe for level before tightening the screws down all the way.

Lag screws used to install safe

Tighten screws with a socket wrench

Once installed, you’re ready to stash your small valuables in your new safe.

For key-operated wall safes like this one, which uses a Medeco lock, keep the keys in a secure location.

For a wall safe with combination lock, write the code down and store it in a safe place.

Regardless of the type, avoid accessing your safe in front of visitors.

See a small wall safe at

See a small wall safe at

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