Keyed-Alike Locks Explained
One key for the front door, back door, garage and gate. How it works, what it costs, and the one situation where it is a bad idea.
Most houses accumulate locks rather than plan them. The front door came with the house, the back door was replaced at some point, the garage has its own key and the gate has another. The result is a keyring that takes a moment to sort through in the dark.
What it actually means
Keyed alike simply means several locks are set up to accept the same key. It is not a special product — a locksmith re-pins the cylinders you already have so they match.
In most cases the existing hardware stays exactly where it is. Nothing is replaced and nothing looks different afterwards.
Why it is worth doing
The benefit is practical rather than dramatic: one key, no fumbling, and far fewer copies floating around.
Fewer keys in circulation is itself a security gain, because most key-related problems come from copies nobody can account for — the flatmate who moved out, the tradesperson from three years ago, the key that was cut for a neighbour once.
What it costs
Usually lower than people expect, because you are paying for re-pinning rather than new locks.
Where a cylinder is worn out it makes sense to replace that one at the same time, which is ordinary lock repair work rolled into the same visit.
When it is a poor idea
Where different doors genuinely need different access. A sleepout you rent out, a garage a business shares, or an office within a house are all cases where one lost key should not open everything.
In those we would suggest a small master key setup instead, where you hold a key that opens all of it and others hold keys that open only their part. Commercial versions of this are covered under commercial door locks.
The natural moment to do it
If you are already replacing a lock, that is when to bring the rest into line. The same applies after a break-in or when keys have gone missing and everything needs re-keying anyway — see after a break-in.
A common Hamilton situation
A house with a front door, a back door onto the deck, a garage side door and a gate — four locks and four keys, none of them planned.
Bringing that down to one key is a straightforward visit anywhere in Hamilton, and it is the job people are most pleased with afterwards for how ordinary it is.
Our lock installation and residential locksmith pages cover the work, or ask for a price with a list of your doors.
Common questions
Do I need to buy new locks?
Usually not. Existing cylinders are re-pinned to match, so the hardware on your doors stays as it is. Only worn out cylinders are worth replacing while we are there.
Can any lock be keyed alike with any other?
They need to be compatible cylinder types. Most common domestic locks can be matched; a few cannot. We check before quoting.
Is one key for everything less secure?
It concentrates risk into one key, which is why it suits a household but not a property with separate tenants. Where access needs to differ, a master key setup is the better answer.
Can you include the garage and gate?
Usually yes, if the cylinders are compatible. Padlocks are often available keyed to the same system too.