Moving day comes with a long list: utilities, boxes, address changes, appliances, school paperwork, and the first grocery run. I would put one more job near the top of that list: decide what to do with every exterior lock.

That matters in a growing community. The U.S. Census Bureau estimates Spring Hill’s population reached 61,336 in 2025, a 21% increase from the 2020 estimate base. The city also spans both Maury and Williamson counties, so “moving to Spring Hill” can mean many neighborhoods, home ages, door styles, and property arrangements.

The practical security question is the same: can you account for every key that opens the house? At closing, you may receive a neat set of keys, but you usually cannot know how many copies were made for relatives, neighbors, contractors, cleaners, pet sitters, or previous occupants.

You do not always need brand-new hardware. In many homes, rekeying the sound locks is the sensible answer. In others, worn, damaged, mismatched, or outdated hardware makes replacement the better choice. Sometimes a mixed plan—rekey some doors and upgrade others—solves the real problem without replacing good parts.

The short answer: reset access after you take possession

If you have just bought a house, I recommend resetting access to every exterior door as soon as reasonably possible. Lock manufacturers give the same basic move-in advice: Schlage identifies moving as a reason to rekey or replace locks, and Kwikset recommends rekeying or replacing exterior locks after possession changes.

This is not about suspecting the previous owner. It is about establishing key control. A new key means old, unreturned copies no longer operate the rekeyed or replaced lock.

If you are renting, start with the property owner or manager. Your lease and the property’s rules may control whether hardware can be changed, who must approve the work, and who receives a key.

What rekeying a lock actually changes

Rekeying changes which key operates the existing lock. The exterior hardware—the knob, lever, handleset, or deadbolt—normally stays on the door while the keyed portion is configured for a new key.

That makes rekeying a strong option when:

• The lock works smoothly and is in good physical condition.
• The door closes and the deadbolt extends without forcing it.
• You like the hardware’s appearance and function.
• The existing locks are compatible with the key plan you want.
• Your main goal is to make all previous keys stop working.
• You want fewer keys and compatible locks can be keyed alike.

Rekeying is about access control, not repairing every door problem. If a deadbolt binds because the door has shifted, changing the key will not correct the alignment. If a lever is loose, a latch is unreliable, or the hardware is badly corroded, the condition of the lock or door still needs attention.

My preference is to separate those questions: first, does the door and hardware work correctly? Second, who should have a working key? That keeps a straightforward key-control job from being confused with a necessary repair or upgrade.

When replacing the locks makes more sense

Replacement removes the existing lock hardware and installs a different lock. It is the better choice when the current hardware cannot reliably do its job or does not fit the way you want to use the home.

I would lean toward replacement when:

• A deadbolt, latch, knob, lever, or cylinder is damaged or unreliable.
• The key sticks, turns inconsistently, or requires a special trick even after the door’s alignment is checked.
• The hardware is badly worn, loose, or corroded.
• Different doors use incompatible lock systems and cannot support one practical key plan.
• An exterior door has only a locking knob or lever and you want an appropriate deadbolt evaluated.
• You want to add keypad, smart-lock, restricted-key, or high-security features.
• A remodel changed the door, trim, backset, or function required at that opening.
• You want hardware that is easier for a household member to operate.

Do not choose a replacement only by finish color or a marketing claim. Look for tested performance that fits the door and your needs. The ANSI/BHMA A156.39-2025 standard addresses residential lockset durability, security, finish, and related performance. BHMA also says its residential Secure Home label reports independently tested security, durability, and finish.

A rating is useful, but installation and the condition of the complete door opening still matter. A quality deadbolt cannot correct a damaged frame, a loose strike, or a door that will not close properly.

Rekey, replace, or upgrade? Use this decision guide

Here is the simple way I organize the choice.

Rekey when the hardware is sound

Choose rekeying when the lock is working properly and your main concern is unknown copies of the old key. This preserves useful hardware while giving the household a new key.

It can also simplify daily access if compatible exterior locks can use the same key. That does not mean every lock in every house can automatically be keyed together. Brand, keyway, cylinder type, and hardware condition affect compatibility.

Replace when the hardware has a problem

Choose replacement when the lock is damaged, unreliable, incompatible with the rest of the plan, or missing a function you need. Replacement also makes sense when appearance, accessibility, or the type of access must change.

Upgrade when you want more control, not just a new key

An upgrade may be appropriate if you want temporary codes, easier removal of a former user’s access, a restricted-key system, or higher-security hardware. Decide which problem you are solving before shopping.

A smart lock can improve convenience, but it is not automatically the right answer for every door. Ask who will manage codes, how the lock behaves when its battery is low, whether a physical key override is needed, and who should have app access. Mechanical operation, door alignment, and account security all remain important.

Walk the whole property before choosing

Do not stop at the front door. Before changing locks on a new house, make one complete list of openings and access methods:

• Front, back, and side exterior doors
• The door between the garage and the living area
• Exterior garage, basement, utility-room, and workshop doors
• Patio or porch doors with keyed hardware
• Detached sheds or storage buildings
• Gates and padlocks that transferred with the property
• Mailbox keys, when the box is controlled by an owner or association
• Keypads, smart locks, alarm panels, garage remotes, and access apps
• Spare keys left in drawers, cabinets, lockboxes, or old hiding places

Test normal operation from the proper side of each door. The latch should engage, the door should close without lifting or pulling it into place, and the deadbolt should reach its locked position without excessive force.

This inventory often reveals that the best plan is not “rekey everything” or “replace everything.” You might rekey two sound deadbolts, replace one damaged handleset, correct an alignment problem, remove an old access code, and account for garage remotes. That is a more useful security reset than buying a box of matching hardware before looking at the doors.

For a broader review after you unpack, my Spring Hill home-security checklist covers exterior doors, keys, garages, deliveries, smart devices, and trusted access.

Build a clean key and code plan

Once the hardware decision is made, decide who gets access and how it will be managed.

Start with the smallest sensible number of permanent keys. Give keys directly to the people who need them instead of creating new hiding places outside. Record how many copies are issued, and avoid putting a full address on the key ring.

For keypad or smart locks, remove codes and app users that transferred with the home. Create separate codes for household members when the device supports them rather than sharing one code with everyone. Temporary workers, pet sitters, or guests should receive time-limited access when that feature is available.

Keep one secure backup plan for a dead phone, a low lock battery, or a forgotten code. The details depend on the device, so follow the current manufacturer’s instructions for your exact model.

If one key for several doors is a priority, say so before the work begins. The locks need to be checked for compatibility, and any new hardware should be selected as part of the same plan.

A move-in lock checklist for Spring Hill homeowners

Use this list after closing and before key copies begin multiplying:

• Account for every exterior door, keyed outbuilding, remote, code, and access app.
• Test each door and lock for smooth, reliable operation.
• Identify missing, damaged, loose, corroded, or mismatched hardware.
• Decide which sound locks can be rekeyed.
• Decide which locks need repair, replacement, or a functional upgrade.
• Confirm whether compatible locks can share one key.
• Remove old keypad codes and smart-lock users.
• Issue only the keys and codes your household actually needs.
• Store ownership information, device instructions, and backup keys securely.
• Recheck rarely used doors after the move settles down.

Vadai Lock and Key’s residential locksmith services include lock rekeying, lock changes, lock repair, new lock installation, and high-security lock options. The right choice depends on the actual door, existing hardware, and access plan—not on replacing every lock by default.

Frequently asked questions

Should I change locks after buying a house?

Yes, you should reset access after taking possession because you cannot reliably account for every old key copy. That can mean rekeying sound locks, replacing unsuitable hardware, or using both approaches.

Is it cheaper to rekey or replace locks?

Rekeying often uses less new hardware when the existing locks are compatible and in good condition. The actual total depends on the number and type of cylinders, compatibility, door condition, and any upgrades you choose. I would not recommend deciding from a generic online price alone.

When comparing quotes, make sure each one covers the same doors, cylinders, key copies, repairs, and hardware so the totals mean the same thing.

Can every lock in my house use the same key?

Not always. Locks generally need compatible keyways and cylinders. If you want one-key convenience, have the existing hardware checked before buying replacements.

Do I need a smart lock when I move?

No. A properly operating mechanical lock may meet your needs. A smart lock is worth considering when code management, temporary access, or remote features solve a real household problem. It should still fit the door and have a clear backup-access plan.

What should I do first if a lock is sticking?

Do not assume the key is the only problem. Check whether the door closes normally and whether the deadbolt aligns without pushing, lifting, or pulling the door. A sticking lock can point to door alignment, worn hardware, key wear, or another issue that should be diagnosed before choosing rekeying or replacement.

Make the decision before old access becomes new routine

The best time to establish key control is early, before spare keys, codes, and remotes spread through the household. Keep the hardware that works, replace what does not, and upgrade only where the added function is useful.

If you have moved to Spring Hill or a nearby Middle Tennessee community and want help deciding what can be rekeyed and what should be replaced, contact Vadai Lock and Key or call (615) 378-5575. Our posted service hours are 6 a.m. to 10 p.m., seven days a week.