Rekeying Locks After Buying a New House

Table of Contents

• Why You Should Rekey Your Locks After Buying a New House
• Security Risks: What Previous Homeowners Could Access
• Rekeying vs Replacing Locks: Which Option Makes Sense
  • How Rekeying Works
  • When to Replace Instead of Rekey
• Cost to Rekey House Locks: What to Expect
• How Long Does It Take to Rekey a House
• Professional Locksmith Service vs DIY Rekeying
• Smart Locks and Modern Security After Your Home Purchase
• Your Home Security Checklist: Beyond Lock Rekeying
• Frequently Asked Questions

Last Updated: September 19, 2026

Why You Should Rekey Your Locks After Buying a New House

Rekeying locks after buying a new house is one of the most overlooked security decisions new homeowners make. You have no way of knowing how many key copies exist or who might have access, former owners, contractors, real estate agents, or service providers could all possess working keys to your doors.

Rekeying locks after buying a new house establishes practical control over who can enter your property.

Rekeying is straightforward: a locksmith removes the internal pins and springs from your existing lock cylinder and replaces them with a new configuration that matches a fresh key. Your current deadbolts and hardware stay in place. Only the internal mechanism changes, making it impossible for old keys to work.

Without knowing the property's full history, contractor access, showing frequency, spare key distribution, rekeying is the logical first step in securing your new home.

Security Risks: What Previous Homeowners Could Access

The security vulnerability is real and immediate. Every person who held a key, the seller, contractors, cleaners, inspectors, and real estate agents, could theoretically still access your home, with no way to verify if they returned keys or made duplicates.

This is a documented residential security risk. A contractor might have kept a key; a real estate agent could have distributed spares. Those keys remain functional until you change the lock mechanism.

An unauthorized person with a key could enter while you're away, move items, access documents, or steal valuables, damage may not be immediately obvious.

Rekeying eliminates this risk entirely. Once the pins and springs are reconfigured, every old key becomes useless. Only your new keys work.

Rekey locks after buying a new house before moving in belongings. The window between closing and occupancy is when your home is most vulnerable to unauthorized entry.

Rekeying vs Replacing Locks: Which Option Makes Sense

Two main options exist: rekeying your existing locks or replacing them entirely. Both solve the security problem but differ in cost, time, and outcomes.

How Rekeying Works

Rekeying involves disassembling the lock cylinder and replacing the internal pins and springs with a new configuration. Your door hardware, strike plate, and frame remain untouched.

The process is mechanical and precise, typically taking 15-30 minutes per lock. Professional locksmiths have the specialized tools and expertise to ensure the work functions correctly.

Rekeying preserves existing hardware that functions smoothly while changing who can open the locks.

When to Replace Instead of Rekey

Lock replacement makes sense if existing locks are damaged, worn, or low-quality, or if you want smart locks or keypad entry systems.

Replacement also lets you standardize hardware throughout your home, whereas rekeying keeps existing locks that may be different brands or styles.

The trade-off is cost and time, replacement is more expensive and takes longer, but you get new hardware under your control.

Cost to Rekey House Locks: What to Expect

The cost to rekey house locks varies based on several factors: the number of locks, the complexity of each lock, your location, and whether you hire a professional or attempt DIY rekeying.

Professional rekeying service costs depend on how many entry points you want secured. Most new homeowners rekey the front door, back door, and garage entry at minimum. Some also rekey bedroom locks or office doors. The more locks you rekey, the better the per-lock rate typically becomes, as a locksmith can work more efficiently.

For specific pricing on rekeying locks after buying a new house, Lock it All Locksmithing provides quotes based on your exact situation. Contact the team at 615-810-7304 to discuss your home's security needs and get pricing.

Service call fees may apply if the locksmith travels to your home, though many locksmiths include this in their overall quote. Emergency or after-hours rekeying costs more than standard appointments. If you need rekeying done immediately after closing, expect to pay a premium for rapid scheduling.

DIY rekeying is possible if you have the right tools and patience. You'll need a rekeying kit specific to your lock brand, which costs less than professional service. However, DIY rekeying requires precision and care. A mistake means the lock won't function, and you'll need professional help anyway, potentially costing more in the end.

Most homeowners find professional rekeying more reliable and faster than attempting it themselves. The locksmith brings proper tools, knows how to handle different lock types, and guarantees the work functions correctly.

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How Long Does It Take to Rekey a House

The time required to rekey a house depends on how many locks you're rekeying and their complexity. A single lock typically takes 15-30 minutes when a professional handles it. This includes removing the lock cylinder, replacing the pins, reassembling, and testing.

For a typical three-entry-point rekey (front door, back door, garage), you're looking at 45 minutes to 90 minutes total. The locksmith works sequentially, so if you have five locks to rekey, expect two to three hours.

The timeline also depends on lock condition. If a lock hasn't been serviced in years, it might be stiff or corroded, requiring extra time to open and service properly. If locks are well-maintained, the process moves faster.

Scheduling matters too. If you book a locksmith immediately after closing, you might wait days for an appointment during busy seasons. Planning ahead and scheduling rekeying before you move in eliminates the rush and often provides better availability.

Most homeowners can have rekeying locks after buying a new house completed in a single visit. You don't need multiple appointments or days of work. One professional visit handles all your entry points.

Professional Locksmith Service vs DIY Rekeying

The choice between hiring a professional locksmith and attempting DIY rekeying hinges on skill level, tool availability, and risk tolerance.

Professional locksmiths bring specialized training and equipment. They understand different lock mechanisms, know how to handle security vulnerabilities, and can rekey most residential locks quickly. They also provide accountability. If something goes wrong, they fix it. If a lock doesn't work after rekeying, they troubleshoot and correct the problem at no additional cost.

Lock it All Locksmithing offers professional rekeying service with the expertise to handle modern residential locks. Professional service means your locks function correctly, and you have recourse if issues arise.

DIY rekeying appeals to homeowners wanting to save money. Rekeying kits are available online and in hardware stores. The process is straightforward in theory: remove the cylinder, swap the pins, reassemble. In practice, precision matters enormously. Pins must be exactly the right size and placed in exact sequence. One error and the lock won't turn.

The risk with DIY rekeying is damaging the lock or getting pins stuck. If you force reassembly incorrectly, you might crack the cylinder or bend pins. You could end up with a lock that doesn't work and no way to open it without professional help.

Most homeowners who attempt DIY rekeying either succeed quickly or discover they need professional help partway through. The time you save on labor costs can evaporate if you need a locksmith to fix a mistake or extract a stuck lock.

For peace of mind and reliability, professional rekeying is the standard choice. You're paying for expertise and accountability, not just labor.

Smart Locks and Modern Security After Your Home Purchase

Modern homes increasingly feature smart locks alongside traditional deadbolts. If your new house has a smart lock or you're considering installing one, rekeying the existing traditional locks still matters.

Smart locks offer convenience: keyless entry, remote access, activity logs, and integration with home automation systems. But they don't replace traditional locks. Most smart locks work by replacing the interior lock mechanism on an existing deadbolt, or they sit alongside a standard lock. Either way, the traditional lock mechanism underneath still needs to be secured.

Rekeying locks after buying a new house remains important even if you plan to install smart locks. You still need to address the security risk from old keys in circulation. Rekeying your existing deadbolts protects you while you plan smart lock upgrades.

Smart locks add a layer of modern security, but they're an enhancement, not a replacement for basic lock rekeying. A smart lock on a door with an old key still circulating doesn't fully solve your security problem. Someone with a traditional key could still bypass the smart mechanism.

If your new home has smart locks already installed, verify that the previous owner has provided all codes and access credentials.

Your Home Security Checklist: Beyond Lock Rekeying

Rekeying locks after buying a new house is the foundation of home security, but it's not the complete picture. A comprehensive security approach includes several additional steps.