Common Lock Mistakes Homeowners Make After Moving In
Most people move into a new home without addressing the locks at all. These are the most common mistakes — and how to fix them before they become a problem.
· 4 min read · Residential
Moving into a new home is a high-priority, high-stress period. Lock security typically falls somewhere far down the list between unpacking boxes and setting up utilities. But the first few weeks after moving in are actually when your home is most vulnerable — you don't yet know who has keys, the hardware is unknown to you, and you haven't established any security routine.
Mistake 1: Not Rekeying Immediately
This is the most common and most critical mistake. When you take possession of a home, you receive a set of keys — but you have no idea how many other copies exist. The previous owners may have given keys to neighbors, housekeepers, contractors, family members, or real estate agents.
Rekeying changes the internal pin configuration so only your new keys work. It's inexpensive ($80–$150 for a full home), fast (under an hour), and eliminates complete uncertainty about who has access.
If a renovation follows the move, plan contractor key access and the final handover before the crew arrives.
Mistake 2: Ignoring the Grade of Existing Locks
Hardware included with a home purchase or rental is often builder-grade — meaning it meets the minimum code requirement but provides minimal security. Grade 3 (builder-grade) deadbolts can be picked in under a minute and fail basic kick-in tests.
Check your deadbolt for a grade mark (Grade 1 or Grade 2 is adequate). If there's no marking, it's likely Grade 3. Replacing a Grade 3 with a Grade 1 deadbolt costs $80–$150 per door and significantly improves kick-in and picking resistance.
Mistake 3: Ignoring the Strike Plate
Even a good deadbolt is only as strong as what it locks into. Standard strike plates use 3/4-inch screws into the door jamb — a single kick can split the jamb regardless of the deadbolt quality.
Upgrading to a heavy-duty strike plate with 3-inch screws that reach the wall stud behind the jamb costs $15–$30 and dramatically increases kick-in resistance. This is often the highest-value security upgrade available.
Mistake 4: Using Hidden Spare Keys
The "hidden key under the rock" approach is well-known to burglars. Fake rocks, door frame ledges, potted plants, and under-mat keys are checked as a matter of routine.
Instead: give a spare to a trusted neighbor or use a combination lockbox installed out of direct sight. Digital smart locks with temporary codes eliminate the need for physical spare keys entirely.
Mistake 5: Not Checking All Entry Points
New homeowners often focus on the front door. But secondary entry points — back doors, side gates, garage doors, and the door from the garage into the house — are often left with lower-quality hardware.
Walk every entry point on the property and assess the hardware quality. The most common burglar entry in Miami residential neighborhoods is through rear or side doors, not the front.
Mistake 6: Assuming New Locks Mean Secure Locks
New-looking locks are not necessarily better than older ones. A recently installed cheap deadbolt is less secure than a well-maintained Grade 1 deadbolt from five years ago. Age is less important than grade and installation quality.
Related Articles
- Can Locksmiths Open Locked Doors Without Damage? — The honest answer to one of the most common locksmith questions — and when damage is actually unavoidable.
- Preventing Lock Corrosion in Coastal Miami Homes — Salt air destroys standard door hardware faster than any other environmental factor. Here's how to choose and maintain the right locks for coastal properties.
- Your Key Turns But the Door Won't Open — Causes and Fixes — When the key rotates but the door stays shut, the problem isn't the lock cylinder — it's usually the latch, deadbolt bolt, or door alignment. Here's how to diagnose it.