A lock change involves removing your existing lock hardware and installing a new lockset in its place. This is different from a lock rekey, which keeps the original hardware but alters the internal pin configuration so old keys no longer work. Both are valid security measures, but the right choice depends on the condition of your current hardware, the security level you need, and how much control you want over key access going forward.

At Locksmith Guarantee, we handle lock changes for homes, apartments, rental properties, retail businesses, and office spaces across Maryland. Our technicians carry a wide selection of Grade 1 and Grade 2 ANSI-rated hardware on every service vehicle, which means most jobs can be completed in a single visit without ordering parts.

Maryland homeowners in communities across Montgomery County and Prince George’s County rely on us for lock changes in a wide range of situations. Whether you’ve just moved into a new home, experienced a break-in, or simply want to modernize older hardware, our residential lock change services cover everything from standard deadbolts to smart lock installations.

Commercial lock hardware handles far greater daily use than residential locks, and the consequences of a failure or a security gap are more significant. Our commercial locksmith services cover office buildings, retail storefronts, warehouses, healthcare facilities, and multi-tenant properties throughout Maryland.

One of the most common commercial requests we handle is lock changes following employee departures. When a staff member leaves without returning all keys, changing the affected locks is a straightforward way to restore key accountability. For businesses that want a longer-term solution, we can install an interchangeable core (IC) system, which allows for professional cylinder swaps without disassembling the entire lockset. This is particularly useful for businesses in high-turnover industries.

We also handle storefront door hardware including mortise locks, cylindrical locksets, and rim cylinders. Storefront doors see heavy use and the hardware wears reliableer than interior residential locks. A sagging or misaligned commercial door is one of the most common causes of a cylinder that’s difficult to turn, and in many cases the issue isn’t the lock itself but how the door sits in the frame. Our technicians check the door alignment before recommending a full hardware change.

For businesses that need to comply with fire egress codes, we work alongside our panic bar and exit device installations to ensure your lock hardware meets local requirements. We also handle commercial push bar installation and push bar repair for retail and office properties.

We stock and install a wide range of hardware to match different security needs and budgets. Our technicians are trained on the installation requirements for each brand, which matters because improper installation can void a manufacturer’s warranty and reduce the effectiveness of even premium hardware.

Lock changes aren’t limited to buildings. Our automotive locksmith team handles door lock cylinder replacements on cars, trucks, and SUVs across Maryland. This service is commonly needed after a break-in where the cylinder was punched or drilled, or when a damaged cylinder makes it difficult to insert or turn the key.

We also handle situations where a vehicle key fob has failed and the mechanical key override is the only way to enter the car. Our mobile units carry the tools to replace door lock cylinders on most vehicle makes and models without requiring a trip to a dealership. For lost vehicle keys or transponder key programming, see our car key replacement service.

Locksmith Guarantee provides lock change services throughout Maryland. Our mobile technicians cover the following communities and surrounding areas:

If you’re in a community not listed above, call us to confirm coverage. We serve a wide radius throughout central Maryland and our mobile dispatch covers most areas within Montgomery and Prince George’s counties.