North Side Locksmith Service Team
Local locksmith team
Oct 10, 2026 4 min read
If your Skokie home was built between 1920 and 1960 — and a huge number of the brick bungalows along streets like Karlov Avenue or near McCormick Boulevard were — there is a good chance your front door is hiding a lock that most modern locksmiths rarely see in newer construction. Knowing whether you have a mortise lock or a cylindrical lock is not just a trivia question. It shapes what happens when you get locked out, how much a repair or replacement costs, and whether a standard hardware-store deadbolt will even fit your door.
This guide walks you through how to tell the two lock types apart in about thirty seconds, explains what each one needs when something goes wrong, and covers real scenarios Skokie homeowners run into — from a vintage Baldwin mortise lock on a 1940s six-flat to a brand-new smart mortise lock on a remodeled coach house. By the end, you will know exactly what you have, what it means for your security, and when to call a professional locksmith to handle the rest.
Frequently asked questions
What is a mortise lock and how is it different from a regular deadbolt?+
A mortise lock is a complete locking mechanism housed inside a deep rectangular pocket cut into the door's edge. Unlike a cylindrical deadbolt — which sits in two round holes drilled through the door face — a mortise lock set integrates the latch, deadbolt, and sometimes additional security functions into one self-contained metal case. The result is a mechanically robust system that is common on pre-1970 doors in Skokie's bungalow neighborhoods. The trade-off is that repairs and cylinder replacements require a locksmith familiar with vintage or specialty hardware, since the internal parts are not interchangeable with standard residential deadbolts.
How much will an emergency locksmith cost for a mortise lock issue in Skokie?+
There is no single flat answer because several variables affect the final price: the specific lock brand and model (a vintage Corbin Russwin mortise lock has different parts than a modern smart mortise lock), whether the needed parts are on the truck or must be ordered, the time of day the call comes in, and the travel distance to your Skokie address. What we can tell you is that North Side Locksmith confirms an exact price with you before any work begins — no after-the-fact charges. Call (847) 200-3477 at any hour and we will give you a clear quote on the spot.
Can I rekey a mortise lock myself, or does it need a professional locksmith?+
Rekeying a mortise lock cylinder is significantly more involved than rekeying a standard cylindrical deadbolt. The cylinder must be removed from the mortise lock case using the correct follower tool and plug follower technique for that specific lock body, the pin stack must be repinned to the new key cuts, and the cylinder must be reinstalled with the cam positioned correctly or the lock will not function. Without the right tools and familiarity with the specific lock model — Baldwin, Corbin Russwin, and other legacy brands each have quirks — it is easy to damage the cylinder or lock the tailpiece in the wrong position. We strongly recommend having a skilled locksmith handle this work, both to protect the hardware and to ensure the rekeying is actually effective at excluding old keys.
Is it worth upgrading an old mortise lock to a smart mortise lock?+
For many Skokie homeowners with older doors, yes — a smart mortise lock retrofit can be an excellent investment. Because the mortised pocket already exists in the door, installation often requires far less modification than adding a smart lock to a door originally built for cylindrical hardware. You gain keypad or app-based entry without damaging original woodwork or door thickness. The key factors to evaluate are whether the existing mortise pocket dimensions match the new lock body, whether your door's backset and spindle measurements are compatible, and which smart platform fits your home setup. A residential locksmith who has worked with smart mortise lock installations can assess your specific door in a quick visit and give you an honest recommendation before you purchase any hardware.