Rekey & Door Knob Locks
When a neighbor on Lathrop Avenue changes tenants, or a homeowner near the River Forest Train Station decides it's finally time to stop sharing keys with someone they no longer trust, the first call is usually to a locksmith. Rekeying and replacing door knob locks are two of the most requested services Lake St Locksmith handles across River Forest every single day — and because we're a fully mobile operation, our trained, insured technicians drive directly to your door, no shop visit required.
Open 24 hours, 7 days a week · Licensed, bonded & insured
What surprises most customers is how much variety lives behind the phrase 'door knob lock.' A builder-grade knob on a bedroom closet is a completely different animal from a mortise lock set on a pre-war River Forest two-flat, or a keypad lock door knob on a modern condo. Understanding the difference — and knowing which service actually solves your problem — is what separates a well-equipped locksmith from someone who just drills things out. This page walks you through both rekeying and door knob lock replacement so you can make an informed decision before we even pull into your driveway.
What we do
Available 24/7
Day, night, weekends and holidays — a real local locksmith answers and rolls a fully-stocked van.
Fast local response
Based in River Forest, we reach the River Forest area in well under an hour.
Insured & background-checked
Vetted technicians, up-front pricing, and no surprise add-ons when we arrive.
Damage-free entry
We pick and bypass locks the right way, so most lockouts are solved without drilling anything.
Frequently asked questions
What is the difference between rekeying and replacing a door knob lock?+
Rekeying changes the internal pins inside your existing lock cylinder so the old key no longer works — the hardware on the door stays in place. Replacing a door knob lock means removing the entire knob assembly and installing new hardware. Rekeying is appropriate when the lock is mechanically sound but key control has been compromised. Replacement makes more sense when the knob is worn, damaged, misaligned, or you want to upgrade the security grade or style. Our technicians assess both options on-site and tell you honestly which one fits your situation before any work begins.
How much does it cost to rekey or replace a door knob lock in River Forest?+
The final price depends on several factors: the type of lock (standard cylindrical knob, mortise lock, smart lock door knob, keypad lock door knob), the number of locks being serviced, whether parts need to come from van stock, the time of day, and travel distance to your location in River Forest. We do not quote a price until we've assessed the job, and we confirm the full cost before touching anything. There are no surprise charges added after the work is done.
Can you rekey a mortise lock the same way you rekey a regular door knob?+
Not exactly — mortise locks use a different cylinder format and a more complex internal mechanism than a standard cylindrical knob. The rekeying process requires mortise-specific pin kits and, in some cases, a replacement cylinder that fits the original mortise pocket dimensions. Our technicians are experienced with the antique and legacy mortise hardware common in River Forest's pre-war housing stock and carry the tools to service them properly on-site.
Is it safe to try picking my own door knob lock if I'm locked out?+
It's understandable to look for a quick fix when you're locked out, but attempting to pick or force a lock yourself — even your own — carries real risks. An incorrect technique can break internal components, damage the cylinder, or jam the lock entirely, turning a straightforward lockout into a more expensive hardware replacement. The safer approach is to check for a spare key, verify whether another entrance is accessible, and then call a trained, insured locksmith who can open the door using professional non-destructive methods. We're available 24/7 at (708) 294-2643.
What types of door knob locks do you install for bedrooms and interior doors?+
For interior applications like bedrooms and home offices, we install privacy knobs — door knob with lock for bedroom use — that operate with a push or turn button on the inside and a small emergency release pinhole on the outside. These do not use a keyed cylinder. We also install passage knobs (no lock), keyed interior knobs for rooms requiring actual key control, and where clients want a modern upgrade, keypad lock door knob or smart lock door knob options that eliminate physical keys entirely. We match finish and style to your existing hardware where possible.
Do you service commercial locks and multi-unit properties in River Forest?+
Yes. Our commercial locksmith services cover office buildings, multi-family properties, retail storefronts, and mixed-use buildings throughout River Forest. Commercial jobs often involve higher-grade hardware, master key systems, mortise lock sets on heavy-duty doors, and access control integration. The factors that determine pricing on commercial work are the same as residential — hardware type, number of locks, parts required, and timing — but commercial jobs are quoted per-project so building managers know the full scope before we start.
Locked out or need a lock fixed? We are on the way.
Open 24 hours, 7 days a week · Insured, background-checked technicians · Up-front pricing
(708) 294-2643