Why Rekeying Your Locks is a Smart Move — A Greater Boston Locksmith Explains
If you've recently moved into a new home, lost a key, or find yourself in a situation where someone has access to your property who no longer should — rekeying your locks is one of the smartest and most affordable security decisions you can make. Yet many homeowners don't fully understand what rekeying is, how it differs from replacing locks entirely, and when it makes sense to do it.
Here's a practical guide from a working locksmith serving Greater Boston.
What is Rekeying?
Rekeying is the process of changing the internal pins inside your lock cylinder so that old keys no longer work. The lock hardware stays exactly the same — only the internal configuration changes. The result is a new key that works with your existing lock, and every previous key becomes useless.
It's faster than replacing a lock, costs less, and provides exactly the same level of security — assuming your existing hardware is in good condition.
When Should You Rekey Your Locks?
Moving into a new home. This is the single most important time to rekey. When you receive keys at closing, you have no way of knowing how many copies exist or who has them. Previous owners, former tenants, contractors, cleaning services, real estate agents, pet sitters — any of them may still have a working key to your new home. Rekeying immediately after moving in gives you complete control over who has access.
Lost or stolen keys. If your keys are lost, you don't know where they ended up — or who found them. If your keys were stolen, the risk is even more obvious. Rekeying your locks immediately eliminates any security risk from missing keys without the expense of replacing all your hardware.
Someone you no longer trust has a key. This is more common than people realize. A former partner, an ex-roommate, or a family member whose relationship with you has changed — if they have a key to your home and you are no longer comfortable with that, rekeying is the right move.
A tenant has moved out. If you rent out a property, rekeying between tenants is not optional — it's essential. You have no way to verify that a departing tenant hasn't made copies of the key. Rekeying protects your new tenant and limits your liability as a landlord.
An employee has left — especially under difficult circumstances. For small business owners and property managers, an employee leaving with access to keys is a real security risk. Whether the departure was amicable or not, rekeying after an employee who had key access leaves is standard security practice.
Rekeying vs. Replacing — Which Should You Choose?
Rekeying is the right choice when your lock hardware is in good condition and you simply want to invalidate existing keys. It's less expensive than replacing a lock in most cases, and provides exactly the same level of security.
Lock replacement makes more sense when:
The hardware is damaged, worn, or malfunctioning
You want to upgrade to a higher security lock
You want to switch to a smart keypad lock
The locks are very old and no longer performing reliably
When in doubt, a locksmith can assess your hardware and give you an honest recommendation.
One Key for All Your Locks
One often overlooked benefit of rekeying is the ability to have all your locks keyed alike — meaning one single key opens every door in your home. This is possible when your existing locks all share the same keyway. If you've accumulated different keys for different doors over the years, it's worth asking your locksmith whether your hardware allows it. One key, all doors.
MassBay Lock & Key — Serving Greater Boston
We rekey locks for homeowners, renters, landlords, and small business owners across Newton, Brookline, Cambridge, Wellesley, Waltham, Watertown, Belmont, Lexington, Bedford, Needham, Dedham, Canton, Randolph, Quincy, Milton, Natick, Framingham, and surrounding Greater Boston communities.
Have questions about whether rekeying is right for your situation? Call or text us directly — you'll speak with a locksmith, not a call center.
Call or text: 857.206.2645 Monday–Friday 7am–7pm | Saturday 8am–5pm