When you move into a new home, lose a key, or end a relationship with someone who had a key, you need to ensure that old keys no longer work. You have two options: rekeying the existing locks or replacing them entirely. Both achieve the goal of invalidating old keys, but they differ in cost, scope, and when each makes sense.
📋 In This Article
What Is Rekeying?
Rekeying changes the internal pin configuration of your existing lock so that the old key no longer works and a new key is created. The lock hardware — the deadbolt, knob, or lever — stays in place. Only the internal pins and springs are changed. A locksmith removes the lock cylinder, replaces the pins to match a new key pattern, reassembles the cylinder, and provides you with new keys.
Cost: $15 to $25 per lock when done by a locksmith, or $40 to $80 if the locksmith comes to your home (includes service call fee). Rekeying all exterior locks on an average home costs $80 to $200.
Time: 5 to 10 minutes per lock.
What Is Lock Changing?
Changing locks means removing the existing lock hardware entirely and installing new locks. This includes new cylinders, new keys, and new exterior hardware. You get completely new lock mechanisms and can upgrade to a different style, finish, or security grade in the process.
Cost: $50 to $200 per lock for the hardware, plus $25 to $75 per lock for professional installation. Changing all exterior locks on an average home costs $200 to $600 or more depending on lock quality.
Time: 15 to 30 minutes per lock.
When to Rekey
Rekeying is the right choice when your locks are in good condition and you are satisfied with their quality and appearance, when you simply need to invalidate existing keys (after moving in, losing a key, or ending a roommate arrangement), when you want all locks to work with the same key (called keying alike — a locksmith can set all locks to one key pattern), or when budget is a primary concern.
When to Change Locks
Lock replacement is the better choice when your existing locks are worn, damaged, or low quality, when you want to upgrade security (moving from a Grade 3 to a Grade 2 or 1 lock), when you want to change the style or finish (updating from brass to brushed nickel, for example), when you are switching to smart locks or keyless entry, or when the existing locks are so old that replacement parts are unavailable.
Combining Both Approaches
Many homeowners use a combination — replacing locks on the front door with a higher-security option or smart lock, while rekeying the remaining exterior doors to match. This provides enhanced security where it matters most while keeping costs down on secondary doors. The locksmith can key the new front door lock to match the rekeyed locks, so one key works throughout the house.
DIY Rekeying
Some lock manufacturers (notably Kwikset with their SmartKey technology) offer locks that can be rekeyed by the homeowner without a locksmith. Using a special tool included with the lock, you can rekey the lock to any Kwikset key in about 15 seconds. This is convenient for rental property owners and anyone who needs to change keys frequently. The trade-off is that SmartKey locks, while convenient, are slightly less pick-resistant than some traditional pin tumbler designs.
Whether you need rekeying or lock replacement, our team at Lock Security Pros provides fast, professional service for both. We will assess your current locks and recommend the most cost-effective approach for your security needs. Contact us to secure your home with confidence.
Frequently Asked Questions
What is the difference between rekeying and replacing locks?
Rekeying involves changing the internal pins of an existing lock so old keys no longer work, while the lock hardware stays the same. Lock replacement involves removing the entire lock mechanism and installing new hardware. Rekeying is more affordable and ideal when your existing locks are in good condition. Full replacement is recommended when locks are worn, damaged, or you want to upgrade to higher-security models. When considering locksmith services for your property, it’s important to work with licensed and experienced professionals who understand local requirements and industry best practices. A qualified locksmith services provider will assess your specific situation, provide transparent pricing, and ensure the work meets all applicable standards. For personalized advice tailored to your needs, contact Lock Security Pros for a free consultation.
What should I do if I am locked out of my home?
Stay calm and check all doors and windows for an unlocked entry point before calling a locksmith. If you cannot find alternative access, contact a licensed locksmith who offers emergency services. Avoid attempting to force the lock yourself, as this can cause expensive damage to the door and lock mechanism. A professional locksmith can typically gain entry without damage within thirty minutes of arrival. When considering locksmith services for your property, it’s important to work with licensed and experienced professionals who understand local requirements and industry best practices. A qualified locksmith services provider will assess your specific situation, provide transparent pricing, and ensure the work meets all applicable standards. For personalized advice tailored to your needs, contact Lock Security Pros for a free consultation.
How often should I rekey or change my locks?
You should rekey or change locks whenever you move into a new home, after losing keys, following a break-in or attempted break-in, after ending a relationship with someone who had keys, and when keys have been in the possession of contractors or service providers. As a general practice, rekeying every few years provides added security. Rekeying is more affordable than full lock replacement and equally effective. When considering locksmith services for your property, it’s important to work with licensed and experienced professionals who understand local requirements and industry best practices. A qualified locksmith services provider will assess your specific situation, provide transparent pricing, and ensure the work meets all applicable standards. For personalized advice tailored to your needs, contact Lock Security Pros for a free consultation.