Roy Chicago Locksmith Service Team
Local locksmith team
Jun 26, 2026 10 min read
If you've ever stood in the hardware aisle of a Chicago home improvement store staring at a wall of door hardware and wondering whether you need a mortise lock or a standard door knob lock, you're not alone. It's one of the most common questions our team at Roy Chicago Locksmith hears from homeowners across neighborhoods like Lincoln Park, Pilsen, and Wicker Park — areas full of vintage greystone flats and newer construction side by side, each with very different door prep and security needs.
The truth is, both lock types have a legitimate place in Chicago homes — but choosing the wrong one can mean a weaker door, an awkward retrofit, or money spent twice. This guide breaks down exactly how each lock works, where each one shines, and how to figure out which is the better fit for your specific door before you buy or call us to install.
## What Is a Mortise Lock — and Why Do So Many Chicago Doors Already Have One?
A mortise lock is a lock set that fits into a deep rectangular pocket — the mortise — cut into the edge of the door itself. The lock body lives inside the door, rather than sitting in a simple cylindrical hole drilled through it. Because of this, the entire locking mechanism, the latch, the deadbolt, and in many cases a privacy thumb-turn, are all housed in one robust steel cartridge. This gives the door edge significantly more meat and reinforcement around the lock. If you live in a Chicago two-flat or greystone built before 1970, there's a very good chance your front door already has a mortise lock set pocket in it — even if a previous owner swapped in a cheaper knob lock at some point.
This matters because retrofitting a door that was originally built for a mortise lock back to a proper mortise lock set is often the right call. The existing pocket means less labor and less wood removal. Mortise locks are also the reason older Chicago front doors feel so solid when you push on them — the bolt engages deeply into the strike plate and door frame, making kick-in attacks considerably harder than with a surface-mounted knob lock. For homeowners on streets like Milwaukee Avenue or Devon Avenue where foot traffic is high, that added resistance is worth understanding.
## Door Knob Lock Basics: Where the Cylindrical Knob Lock Still Makes Sense
A door knob lock — sometimes called a knob lock or cylindrical lock — works through a round bored hole in the door face, typically 2-1/8 inches in diameter, with a second smaller hole for the latch. The locking mechanism is built into the knob itself, and a key cylinder sits on the exterior knob. These are the most common locks on interior and secondary doors in American homes, and they're easy to find, easy to source, and fast to install or replace.
The honest truth about a door knob with lock as your only exterior security: it's not ideal. Knob locks are vulnerable to wrench attacks because the knob gives an attacker mechanical leverage, and the bolt throw is often shorter than a mortise lock. That said, a door knob with lock and key paired with a separate deadbolt above it — a common setup on Chicago coach house doors and garage entry doors — can be a practical and code-compliant solution. Where knob locks genuinely shine is on interior doors: bedroom doors, bathroom doors, basement utility rooms, and interior office doors in commercial spaces. They're cost-effective, widely compatible with standard door prep, and easy to rekey when tenants change.
## Security, Installation, and Fit: Choosing the Right Lock for Your Chicago Door
Here's a practical decision framework. First, look at your door edge. If you see a large rectangular faceplate — wider and taller than a standard latch plate — you almost certainly have an existing mortise pocket. Installing a knob lock in that door without filling and repairing the pocket first creates a structural weak point. Conversely, drilling a mortise pocket into a solid door that wasn't built for one is a significant carpentry job that requires precision — this is work for a trained locksmith, not a weekend project. Second, consider the door's primary function. Front entry doors on Chicago two-flats, six-flats, and single-family homes in neighborhoods like Beverly or Bridgeport see the most abuse from weather, forced entry attempts, and heavy daily use. A quality mortise lock set from a manufacturer like Schlage or a comparable commercial-grade brand is engineered for that load. Interior doors and secondary service doors can appropriately use a cylindrical knob lock.
Third, think about who is coming and going. Rental properties, Airbnb units, and multi-unit buildings benefit from mortise locks because they accept interchangeable cylinders that can be rekeyed quickly and cheaply each time a tenant turns over — without replacing the entire lock body. If you're managing a small commercial space on Chicago's North Side and need to rekey frequently, a mortise lock with an interchangeable core is a significant operational advantage over replacing cylindrical knob lock sets. Our commercial locksmith team installs and services both types across Chicago businesses daily, from storefronts on Clark Street to warehouse offices in the West Loop. If you'd like a professional assessment of your current hardware before committing to a purchase, call us at (773) 289-0025 — we'll come to your door, evaluate the existing prep, and give you an honest recommendation.
## How Much Does a Locksmith Cost in Chicago? Understanding What You'll Actually Pay
One of the most searched questions we see is 'How much does a locksmith cost in Chicago?' or 'How much should locksmiths charge?' — and the honest answer is: it depends on several real factors, not a flat number. The type of lock being installed or serviced matters significantly — a mortise lock set installation involves more labor than swapping a knob lock cylinder, because the door prep, alignment, and strike plate setting require more precision. The time of day matters too: emergency locksmith calls in the middle of the night on a Chicago winter weekend involve different logistics than a scheduled afternoon appointment. Travel distance across the Chicago metro, the specific hardware you choose or already own, and whether any door repair or reinforcement is needed all feed into the final number.
What we can tell you is this: we confirm an exact price with you before any work begins, every single time. There are no surprise charges added after the job. People sometimes ask 'Where can I find a cheap locksmith in Chicago?' or 'What to do if you can't afford a locksmith?' — and our answer is always to call us first, explain your situation, and get a straight quote. We'd rather give you an honest number upfront than have you feel pressured mid-job. For emergency locksmith situations — a lockout at 2 a.m. in Lakeview, a broken key in a mortise lock on a Bridgeport storefront — the factors above apply, but the priority is getting you back inside safely. What does an emergency locksmith cost? The same honest answer: we'll tell you exactly before we start. And yes, there is a 24-hour locksmith in Chicago — that's us, around the clock, every day of the year at (773) 289-0025.
## Our Full Range of Locksmith Services Across Chicago
Roy Chicago Locksmith is a mobile, 24/7 operation serving the full Chicago area — from Rogers Park to Mount Greenwood, from Oak Park to South Shore. Here is a specific look at what our trained technicians handle every day: residential lock installation and replacement, mortise lock set installation and repair, cylindrical knob lock installation, deadbolt installation and upgrade, lock rekeying for homeowners and landlords, master key system setup for multi-unit buildings, high-security lock upgrades, lockout service for homes and apartments, broken key extraction from mortise locks and cylindrical locks, door frame repair after forced entry, strike plate reinforcement and upgrade, smart lock installation and programming, keypad lock installation, interchangeable core cylinder service, door hardware alignment and adjustment, lock lubrication and maintenance, garage door lock repair and replacement, sliding door lock installation, window lock installation, mailbox lock replacement, padlock service and installation, automotive lockout service, car key replacement and duplication, transponder key programming, key fob replacement and programming, ignition repair and replacement, motorcycle lockout service, commercial lock installation for storefronts and offices, commercial master key system design, access control system installation, panic bar and push bar installation, and safe opening and combination change. Whether the job is a quick knob lock swap on a coach house in Pilsen or a full mortise lock set retrofit on a vintage greystone in Ukrainian Village, our team carries the tools and hardware to handle it on the spot.
Frequently asked questions
What is a mortise lock, and is it better than a door knob lock for a Chicago front door?+
A mortise lock is a lock set that sits inside a deep rectangular pocket cut into the door edge, housing the latch, bolt, and sometimes a thumb-turn all in one solid body. For a Chicago front door — especially on older graystones, two-flats, or any door that sees heavy daily use — a mortise lock is generally the stronger choice. It offers a longer bolt throw, better resistance to kick-in and wrench attacks, and is easier to rekey for landlords. A door knob lock is better suited for interior doors or as a secondary latch paired with a separate deadbolt. If your door already has a mortise pocket, filling it in and installing a knob lock is usually a step backward in security.
Can I pick a door knob lock if I'm locked out?+
We get asked 'how to pick a door knob lock' fairly often by homeowners who are locked out. Our honest advice: resist the urge to try picking or forcing your own lock. Amateur attempts frequently damage the cylinder, the knob mechanism, or the door itself — turning a simple lockout into a more expensive repair. Before calling us, check for a spare key with a neighbor, try other entry points you legitimately have access to, or call a family member who may have a copy. If none of those options work, call Roy Chicago Locksmith at (773) 289-0025. A trained technician can get you back inside without damage, verify you are the occupant, and rekey or replace the lock right then if needed — safely and legally.
How much does it cost to have a mortise lock installed or replaced in Chicago?+
The final price depends on a few real factors: the type and grade of mortise lock set you're installing, whether your door already has an existing mortise pocket or needs one cut, the condition of the door frame and strike plate, any hardware you supply versus hardware we source, and the time of day if it's an emergency call. We always confirm the exact price with you before any work starts — no surprise charges after the fact. The best way to get an accurate quote for your specific door and situation is to call us directly at (773) 289-0025. We'll ask the right questions or come take a look before giving you a number.
Is Roy Chicago Locksmith available 24 hours a day, including for emergency lockouts?+
Yes. Roy Chicago Locksmith operates 24 hours a day, 7 days a week, 365 days a year across the Chicago area. Whether you're locked out of your home at 3 a.m. in Logan Square, dealing with a broken key stuck in a mortise lock on a North Side storefront, or need a car key replaced on the spot — our mobile team comes to you. There is no after-hours answering service or callback system; when you call (773) 289-0025, you reach us directly.
