The Lockbox Goes On the Door: Install, Test, and Log the Code From First Measurement to First Test

A key lockbox lets a person you choose reach the house without a key on the porch or a neighbor on call. It works only when it is mounted to hold, the code is set and recorded in one safe place, and every person who needs it has opened it at least once. Treat the install as a job with a start, a middle, and an end.

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Choose the spot before you buy the box

Pick a mounting spot that is out of sight from the street, at a height you can reach and check, and close enough to the door that a helper does not walk the house to find it. Check what the surface is, whether brick, wood, siding, or vinyl, because the fasteners for each are different. Write the spot on the sheet so the next person knows where it is.

Compare the box by its mounting and its code

Compare boxes on how they mount, what material they use, and what kind of code they take. A dial code is easy to share but easy to guess if set badly. A key-style box needs a key you must keep track of. Compare the mounting hardware the box includes against what your surface needs, and buy the extra fasteners before you start, not after the first crack.

Mount it so it holds

Mark the holes level, drill pilot holes for the surface you have, and fasten the box with the hardware made for that surface. Tug the box hard in several directions after it is up. If anything moves, stop and fix the mount before you set a code. A lockbox that pulls off the wall in a storm is worse than none.

Set the code and keep the record

Set the code and write it in one place only, on a card in your folder that you control. Do not write it on the door, on the box, or on the sheet where anyone walking by can read it. Keep a short list next to the card that names each person who has the code and when each person was given it, using the names of people, not dates.

Test it with each person who needs it

Have each person who needs the code open the box once, at the door, with you watching. That includes you, a hired helper if you use one, and a trusted neighbor or relative. A code that works for you but not for the person who will need it at night is not a working lockbox. Ask the local emergency service how it wants to be told about a lockbox at your address, and write its answer on the card.

Service it when the people change

Check the mount and the code whenever a helper leaves, a relative moves, or the locks on the house change. Brush off the box, check that the hinge and the dial still turn cleanly, and test the code again. Keep the card current. A lockbox that nobody has tested in a long time is a guess, not a plan.