How To Build A Hidden Door In A Wall

Secret doors are a lot of fun. If you’re thinking about installing one in your home, you’ve come to the right place. Here’s how to build a hidden door in a wall

Measuring and planning.

Measure the wall first. Measure the width of your door and subtract 1/8 to 1/4 inch from its width (depending on how thick your drywall is). Mark where you want to cut out a square or rectangle with a pencil. If you’re using a jigsaw, use it to cut along those lines. If you’re using a drill, drill two holes at each end of your lines and use drywall saws or utility knives to finish cutting through the drywall.

Next, measure the hinges and handles that come with your hidden door kit—they’ll help determine where they get mounted on either side of where you just cut into the wall so that they align perfectly when closed. The dimensions will be printed on their packaging; write these measurements down before unboxing them

Fitting the door.

When fitting the door, make sure it fits the frame. It should be the right size and shape, and it should match the colour of your wall so that no light shows through from behind. The material should be sturdy enough to take knocks and bumps without denting or breaking. You may also want a style that complements your interior design theme.

Creating the doorway.

For this part, you will need a mitre saw or a table saw.

  • Cut the frame. The door frame should be cut at 45 degrees to create an angled edge for the door to slide into. You can either measure 45 degrees and make your cut on one side of the board or use a protractor to mark it. Don’t worry too much about precision here; it’s not necessary for this project – just get as close as possible without making your cuts wonky!
  • Cut the door. There are two ways you can go about cutting your door: you can either have a small hole in it (say, 12″ x 12″) big enough for people to crawl through, or you can make it flush with walls/ceilings like any other wall by cutting both sides of each piece of wood at 45 degrees so that when put together they create an ‘L’ shape with no gaps between them.*Attach hinges onto door frame pieces while leaving enough room on each end so that they’ll fold outwards away from each other instead of facing each other like normal doors do. Attach hinges onto these pieces toward their ends opposite from where hinges were installed on adjacent walls originally (i​f installed ​in center).

Making the door fit.

The door will be perfectly square and level when you are done with this step. Now is the time to make sure it is the correct size. The first thing you want to do is measure your door opening, then measure your new hidden door in its raw state—without any trim or paint on it. Next, use a spirit level to check that both sides of your hidden door are straight up and down (90 degrees). When they are, mark where each hinge needs to go on the wall using a pencil.

Next, drill holes for each hinge using a drill bit that matches the size of your screws (usually 1/2″). Make sure that whatever type of screws you choose will work with whatever type of material your wall is made out of! If they don’t fit well enough, try another type until they do; never force anything into place if there’s even a chance of breaking something! It might take some trial-and-error here but once everything fits together nicely then all that’s left for us now is attaching those hinges onto our new hidden door–and once again I recommend doing this slowly so as not not break anything else along along way too soon

Painting the door and attaching any handles.

Now that you have a frame and door, it’s time to paint and attach any handles. Paint the door whatever color you like, but keep in mind that if your wall doesn’t match it exactly, you’ll want to choose something close enough.

With these steps completed, the only thing left is installing the hinge brackets by drilling small holes into the framing lumber of your wall (if necessary), checking that they’re level with each other at either side of your hidden door location before attaching them with screws. If desired, consider installing a closer on your hidden door as well; this will ensure that it stays closed properly when not in use.

Attaching the hinges.

  • Attach the hinges to the door and doorframe. Hinges are typically identified by two numbers, such as 1/2 or 2-3/4-inch. The first number indicates the width of the hinge, and the second number indicates how far out of plumb it should be positioned on each side (i.e., a 1-inch wide 1/2 inch deep hinge has a total projection from your wall or frame of 1/2 inch). Make sure that you get the right size for your door and frame before purchasing hinges—a good rule of thumb is to add up their minimum measurements in inches and divide by 4, so that you have an even number that corresponds with one of our standard sizes (1/2, 3/4 or full). We recommend using flat head fasteners instead of Phillips screws whenever possible because they don’t require additional tools like drill bits; this step will save time later when attaching them!
  • Attach all four hinges onto each endpiece first using flat head screws; then attach both sides together securely by tightening down bolts until they’re snug against each other without being overly tight!

Its possible to build a secret door in your wall

If you want to build a hidden door, there are some important steps that you need to take first. It’s not as easy as it sounds, and while they don’t have any specific training or experience in building secret doors, many people have tried it. That being said, here are some tips on how to make your own hidden door:

  • Measure and plan your wall space
  • Choose the right size door for the opening
  • Create the doorway with 2 x 4 strips and plywood or drywall (depending on what type of surface is already present)
  • Fit the new frame into place so that it looks like part of wall when viewed from outside room/hallway (this can be done with caulk)


If you’ve never built a hidden door in a wall before consider doing it for your next home improvement project. You’ll be glad you did.

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