Pro Nashville Locksmiths Service Team
Local locksmith team
May 12, 2026 10 min read
If your Nashville home's front door relies on nothing but a door knob lock, you're not alone — and you're not necessarily unsafe. But you may be less protected than you think. Knob locks are everywhere in Middle Tennessee homes, from the craftsman bungalows off Belmont Boulevard to the newer builds in Antioch and Madison, and most homeowners never question them until something goes wrong. The reality is that a standard knob lock, even a quality door knob with lock and key, is designed more for privacy than for genuine security. This article walks you through exactly what that difference means, what upgrading to a deadbolt actually involves, and how to decide whether it's the right move for your home.
The short answer is yes — adding a deadbolt alongside (or instead of) a basic knob lock is almost always worth it. But there's more to the decision than simply buying a new lock at a hardware store. The type of deadbolt, the condition of your door frame, and whether you also want to upgrade to a mortise lock system all affect how much real security you actually gain. Let's break it all down so you can make a confident, informed decision.
## Why a Door Knob Lock Alone Isn't Enough Security
A door knob lock works by turning a small spring-loaded latch into a strike plate. That latch is the problem. Because it's spring-loaded and angled, it can be defeated relatively quickly — even without special tools or skills. Security researchers and law enforcement have documented for years that knob locks on their own offer minimal resistance to a determined intruder. The bolt simply doesn't extend far enough into the door frame, and the frame itself is often the weakest point. A well-placed kick near the knob can cause the strike plate screws to pull right out of soft wood framing, which is extremely common in Nashville's older housing stock, particularly in neighborhoods like East Nashville, Germantown, and 12 South.
Compare that to a deadbolt, which throws a solid, square-ended bolt — typically one inch deep — into a reinforced strike plate. When properly installed with three-inch screws anchored into the door's structural framing (not just the trim), a deadbolt raises the effort required to force entry dramatically. It doesn't eliminate all risk, but it changes the calculus for anyone attempting a break-in. Most opportunistic intrusions rely on speed and ease; a properly installed deadbolt removes both. If you want to go further, a mortise lock system integrates both the latch and the deadbolt into a single reinforced pocket within the door itself — the gold standard for residential and commercial security alike.
## Understanding the Mortise Lock: The Upgrade Most Nashville Homeowners Don't Know About
When locksmiths talk about high-security door hardware, the mortise lock comes up immediately — and for good reason. Unlike a standard cylindrical knob lock or even a basic deadbolt, a mortise lock is set into a deep rectangular pocket (the mortise) cut into the edge of the door. This design integrates the latch bolt, the deadbolt, and sometimes additional security pins into one hardened steel case. The result is a lock that distributes force across a much larger surface area, making it exceptionally resistant to both physical attacks and picking attempts. Mortise locks are common in commercial settings — you'll see them on the storefronts along Broadway and in office buildings near the Gulch — but they're increasingly popular in upscale Nashville homes and any property where the owner wants lasting, high-grade security.
Installing a mortise lock is more involved than swapping a knob lock for a deadbolt, because it requires routing out the door edge. That's a job for an experienced locksmith, not a weekend DIY project. Done correctly, though, it transforms an ordinary door into one of the most secure residential entry points available. Pro Nashville Locksmiths installs and services mortise lock systems across the Nashville metro, whether you're upgrading a single front door or retrofitting an entire property. If you're not sure whether your doors are mortise-ready, our team can assess your door thickness, material, and frame condition and give you an honest recommendation before any work begins. For urgent situations — a broken lock late at night, a failed mechanism after a storm — you can reach us any time at (631) 380-4138.
## How to Change a Door Lock: DIY vs. Calling a Professional Locksmith
Understanding how to change a door lock at a basic level is genuinely useful for homeowners. For a simple cylindrical deadbolt replacement — swapping one Kwikset or Schlage deadbolt for another of the same bore size — a confident DIYer with a screwdriver and a tape measure can often handle it. You remove the existing lock by unscrewing the interior mounting plate, pull the cylinder out, slide the new one in, and test the alignment with the door closed. The critical step most people skip is checking that the strike plate is secured with screws long enough to reach the structural framing, not just the door jamb trim. Short screws are one of the most common security failures in residential door hardware.
However, there are scenarios where calling a professional locksmith is the smarter move: if your door has a non-standard bore, if you're switching from a knob lock to a deadbolt for the first time (which requires drilling a new hole), if you want to install a mortise lock, or if you're rekeying multiple locks to use one key. A trained locksmith will also check for door alignment issues, damaged frames, and worn strike plates — problems that a new lock alone won't fix. As Nashville continues to grow, with new residents pouring into zip codes like 37206, 37209, and 37211, more homeowners are inheriting older door hardware that looks fine but is quietly failing. A professional assessment catches those issues before they become emergencies.
## What Proof Do I Need for a Locksmith, and What Is the Most Common Locksmith Task?
Two questions we hear regularly from Nashville homeowners: what proof do I need to show a locksmith before they'll work on my property, and what is the most common locksmith task? On identification — any reputable locksmith will ask you to verify that you have the right to access or modify the lock in question. For a home, that typically means a government-issued photo ID matching the address, a lease agreement, a recent utility bill, or a combination of these. If you're a renter, your landlord may need to be involved for certain lock changes. This is standard practice and not something to take offense at — it protects you as much as it protects the locksmith's integrity. Our team at Pro Nashville Locksmiths will always confirm ownership or authorization before beginning any work.
As for the most common locksmith task — it's lockouts, by a wide margin. Whether it's a car lockout on I-40, a home lockout after a late shift at Vanderbilt University Medical Center, or a business lockout on a Monday morning in the Gulch, getting people back through their doors safely and quickly is the core of what emergency locksmiths do every day. But lock upgrades — moving from a knob lock to a deadbolt, or from a basic deadbolt to a mortise lock — are a very close second, especially as Nashville's residential market keeps evolving. Beyond lockouts and upgrades, our full list of services includes: residential lockout assistance, commercial lockout response, automotive lockout service, car key replacement, transponder key programming, key fob repair and replacement, ignition repair and replacement, master key system design, mortise lock installation and repair, deadbolt installation, knob lock replacement, lock rekeying, high-security lock installation, smart lock installation, access control system setup, mailbox lock replacement, file cabinet lock service, garage door lock repair, sliding door lock installation, window lock installation, door frame and strike plate reinforcement, lock hardware consultation, safe opening and combination changes, duplicate key cutting, and 24-hour emergency locksmith response throughout the Nashville metro.
## What to Do If You Can't Afford a Locksmith Right Now — And How Pricing Actually Works
If you're weighing a lock upgrade but worried about the cost, here's what's honest and practical: pricing for locksmith services depends on several real factors, not a flat rate. The type of lock being installed (a basic deadbolt versus a high-security mortise lock system), the time of day (overnight emergency calls involve different logistics than a scheduled afternoon appointment), travel distance to your location, and any parts that need to be sourced all contribute to the final quote. What we never do is surprise you with a number after the work is done. Pro Nashville Locksmiths confirms an exact price up front before any work begins — always.
If a full lock upgrade isn't in the budget right now, there are meaningful intermediate steps. Reinforcing your existing strike plate with longer screws is free if you own a drill. Adding a door security bar for overnight use costs very little. And rekeying your current locks — changing the internal pin configuration so old keys no longer work — is typically one of the more straightforward services and doesn't require replacing the entire hardware set. If you're in a true emergency and genuinely cannot reach help, first check every door and window for an unlocked entry point, look for a spare key with a trusted neighbor (many Nashville residents on the same block coordinate this), and if you're locked out of your car, your auto insurance or roadside assistance plan may cover a service call. When you're ready to talk to a professional, we're available around the clock — call (631) 380-4138 and we'll walk you through your options before committing to anything.
Frequently asked questions
Is upgrading from a door knob lock to a deadbolt something I can do myself?+
For a straightforward swap — replacing one deadbolt with another of the same size — many homeowners can manage it with basic tools. But if you're adding a deadbolt to a door that currently only has a knob lock, you'll need to drill a new hole, align the strike plate precisely, and make sure the framing can support longer anchor screws. Mistakes at any of these steps can leave the lock misaligned or easier to force than the original. For a mortise lock installation, the door edge must be routed out correctly — that's genuinely a job for an experienced locksmith. When in doubt, a professional assessment is always worth it.
What is the average call-out fee for a locksmith in Nashville?+
Locksmith pricing varies based on the specific service needed, the time of day, how far the technician needs to travel, and what parts or hardware are involved. There isn't a single flat call-out rate that applies universally. What a trustworthy locksmith will always do is give you a confirmed price up front before starting any work — so you know exactly what you're agreeing to. At Pro Nashville Locksmiths, that's our standard practice on every call, whether it's a midnight emergency lockout or a scheduled deadbolt installation.
How many zip codes are in Nashville, TN, and do you serve all of them?+
Nashville and Davidson County cover a wide range of zip codes — the city proper spans roughly 42 distinct zip codes, with additional codes covering surrounding communities in the greater metro area like Brentwood, Smyrna, and Hendersonville. Pro Nashville Locksmiths operates as a mobile locksmith team, which means we come to you across the Nashville area. Whether you're near Opryland off Briley Parkway, out in Bellevue, or closer to downtown on Broadway, our team is dispatched to your location. Call us at (631) 380-4138 any time to confirm coverage for your specific address.
What should I do if I'm locked out and can't reach anyone right away?+
Start with the safest and simplest options first: check every exterior door and accessible window to see if anything is unlocked, and contact a neighbor who may hold a spare key. If you're locked out of your car, check whether your vehicle's roadside assistance or auto insurance plan covers lockout service. Avoid attempting to pick or force any lock yourself — beyond the risk of damaging the hardware, it can sometimes make a professional's job harder and more involved. Once you're ready for professional help, Pro Nashville Locksmiths is available 24 hours a day, seven days a week, including holidays. One call to (631) 380-4138 connects you with our dispatch team immediately.