What Rekeying Actually Does and What It Doesn’t

Rekeying is often presented as a faster, cheaper alternative to swapping out locks. But whether it’s the right fix depends on the problem you’re solving, the condition of the hardware, and how long you need the solution to last.

Sometimes rekeying is the smartest, most cost‑effective step. Other times it’s only a short‑term measure — or the wrong move altogether.

This guide explains what rekeying changes actually are, when it makes sense, when it doesn’t, and how to choose the best option for your property.

How Rekeying Locks Works

Rekeying alters the lock’s internal pin configuration so old keys stop working. A locksmith removes the cylinder, rearranges the pins, and matches the lock to a new key.

What doesn’t change:

• The external lock hardware
• The cylinder shell or lock body
• The lock’s age or inherent strength

What does change:

• Which keys will operate the lock
• Who can access the space going forward

Rekeying solves key‑control issues — it’s not a hardware upgrade or a fix for a worn or weak lock.

When Rekeying Your Locks Is Worth It

There are clear situations where rekeying is not just reasonable, but the practical choice.

You’ve Just Moved Into a New Property

After buying a home or moving into a new commercial space, rekeying should be on your to‑do list.

You can’t know:

• How many copies of the old keys exist
• Who might still have access
• Whether contractors, cleaners, or previous tenants were given keys

Rekeying gives you immediate control without the expense of replacing solid locks.

Your Keys Were Lost (But the Locks Are Still in Good Shape)

Losing keys doesn’t always mean the lock is worn out. If:

• The hardware is modern and works smoothly
• The lock shows no damage
• There are no signs of forced entry

Rekeying can restore security quickly and affordably.

This is especially true when keys were misplaced rather than stolen during a break‑in.

You Want One Key for Multiple Locks

Many homeowners and businesses rekey so a single key opens several doors, which makes day‑to‑day access much simpler.

• One key for all exterior doors
• Simplified access to multiple entry points
• Easier key management overall

This is common for:

• Houses with garages, side doors, and back entrances
• Small businesses
• Rental properties

As long as the existing locks are compatible and in good condition, this is one of rekeying’s biggest benefits.

You Manage Rentals or Short‑Term Properties

For landlords and property managers, rekeying between tenants is often:

• Faster than replacing locks
• More budget‑friendly
• Sufficient for basic access control

It resets who has keys without unnecessary hardware changes — provided the locks haven’t been worn down by heavy use.

When Rekeying Is NOT Worth It

Rekeying isn’t a universal fix. There are clear cases where replacement is the smarter, longer‑term choice.

The Locks Are Old or Worn Out

Rekeying won’t fix:

• Stiff, gritty, or failing mechanisms
• Loose or unstable hardware
• Corroded or rusted parts
• Frequent jamming or resistance when turning a key

If a lock is already showing wear, changing pins won’t restore reliability — it usually just postpones replacement.

A Key Has Broken Inside the Lock

Broken keys often point to:

• Internal wear
• Misaligned or damaged components
• Stress fractures in the cylinder

Even after extraction, the lock may be compromised. Rekeying doesn’t repair internal damage, so replacement is usually safer.

The Lock Is Outdated or Low‑Security

Older locks frequently lack:

• Pick resistance
• Bump protection
• Reinforced cylinders
• Modern strike plates

Rekeying preserves the same vulnerable design. If your priority is stronger security, upgrade the hardware instead.

The Lock Was Forced During a Lockout or Break‑In

If a lock has been:

• Drilled
• Forcibly opened
• Poorly repaired
• Damaged during an emergency service

Its internals may be weakened. Rekeying won’t fix structural damage — replacement will.

Rekeying vs Lock Replacement: What’s the Real Difference?

Knowing the difference helps you avoid wasted money and lingering vulnerabilities.

Rekeying:

• Changes which keys operate the lock
• Keeps the same hardware
• Costs less up front
• Best when you need access control, not an upgrade

Lock Replacement:

• Installs brand‑new hardware
• Boosts physical security
• Fixes wear, damage, or design flaws
• Costs more initially but usually lasts longer

Choose based on whether your issue is who has keys or the lock’s physical integrity.

Is Rekeying More Affordable?

Most of the time, rekeying is cheaper than replacing locks — especially when:

• You’re rekeying several locks at once
• The hardware is in good condition
• No structural repairs are required

That said, repeatedly rekeying worn locks can add up. If the locks keep failing, replacement is often more cost‑effective over time.

How Long Does Rekeying Last?

Rekeying lasts as long as the lock remains in good working order.

If the lock is:

• Modern
• Well‑maintained
• Properly installed

Rekeying can be effective for many years.

If the lock is near the end of its service life, rekeying may only buy you a short reprieve.

Can You Rekey Locks Yourself?

DIY rekey kits exist, but they carry real risks:

• Incorrect pin settings
• Weakened security
• Voided warranties
• Old keys not fully disabled

Professional locksmiths use the right tools and training to rekey securely and reliably.

Poorly done rekeying can create new problems — from lock failures to fresh vulnerabilities.

How a Professional Locksmith Helps You Decide

A skilled locksmith won’t default to one answer. They evaluate:

• Lock condition
• Hardware age
• Your security needs
• How the locks are used
• Long‑term reliability

Sometimes rekeying is the correct move. Sometimes replacement is safer. Often a mix of both is best.

Balanced, practical advice protects your property — not the cheapest or quickest option by default.

Is Rekeying Worth It Overall?

Rekeying is worth it when:

• The locks are in good condition
• Access control is the primary concern
• You need a fast, cost‑effective fix

Rekeying is not worth it when:

• Locks are worn or outdated
• Your security requirements have changed
• The hardware’s reliability is in doubt

The important thing is to pick the solution that solves the real problem — not the one that seems easier at first glance.

Final Thoughts on Rekeying Your Locks

Rekeying can restore control and peace of mind when used correctly, but it’s not a universal remedy. Knowing the condition of your locks and your security goals helps you choose between a short‑term fix and a lasting upgrade.

When chosen appropriately, rekeying saves time, money, and hassle. Used in the wrong situation, it simply delays meaningful security improvements.

If you’re unsure which path to take, a professional evaluation will help you make a clear, informed choice for your property.

About Alta Locksmithing

At Alta Locksmithing, rekeying and replacement are practical options we help property owners weigh every day. Our locksmiths work with homes, businesses, and rental properties, so we see firsthand how different locks perform over time. We regularly assess whether rekeying will truly solve the issue or whether replacement is the safer, longer‑term answer. Responsible locksmithing means explaining when a simple fix is enough — and when it isn’t. We believe informed choices lead to better security and fewer emergency situations.