Guide

Getting Every Door in Your House on One Key

A house with a front door, a back door and a shed that all take different keys is normal — and it does not have to stay that way.

Most houses accumulate mismatched locks over time: a builder-grade front door, a back door replaced by a previous owner, a shed or gate added later with whatever lock was on the shelf. None of that was planned, and none of it is permanent.

What matched keying means

Keying alike sets multiple locks so the same key operates all of them, without linking them to anything beyond your own property. It is a configuration choice made when a lock is rekeyed or installed, not a special product — any standard deadbolt or knob lock can usually be set this way.

Why it is worth doing

Carrying one key instead of three is the obvious benefit, but the bigger one is fewer keys to lose track of and fewer copies floating around that you cannot account for. A single key that works everywhere is also a single key you actually notice going missing.

The best time to do it

Bundling matched keying into a rekey or a lock replacement you were already scheduling costs little beyond the visit you were already paying for. Doing it later, as its own appointment, means paying for a service call on top of the rekeying itself.

What it will not do

Matched keying will not make a worn-out lock work better, and it will not substitute for replacing hardware that has actually failed. It changes which key fits, not the condition of what the key is turning.

Where to draw the line

Most homeowners key their exterior doors alike and leave interior doors, a shed with lower-value contents, or a rental unit's individual doors on separate keys on purpose — matching everything is not automatically better if you want to hand a key to a dog walker without giving them access to every door on the property.

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