Commercial Locksmith Services

Locksmith in Overland, MO – Serving St. Louis & St. Charles Counties

Tailored Security Solutions for Businesses Since 1979

Running a business comes with enough challenges—security shouldn’t be one of them. At AA Key and Lock Services, we specialize in commercial locksmith services designed to protect your property, employees, and assets.


From master key systems and ADA compliance to 24/7 emergency lockout assistance, we provide complete security solutions for businesses of all sizes throughout St. Louis and St. Charles counties.

Master Key Systems

Take control of access across your property without juggling multiple sets of keys. We design scalable master key systems that simplify entry management, reduce risk, and improve efficiency for offices, retail spaces, and industrial facilities.

A hand inserts a key into a lock on a gray metal surface, holding other keys.
Hand holding a white key card up to a black and silver door access reader on a door.

Access Control & Keyless Entry

Step beyond traditional keys with advanced systems that allow you to track and control access in real time.


Options include:

  • RFID keycards & fobs
  • Mobile app-based entry
  • PIN pads & electronic keypads
  • Biometric fingerprint or retina scanners

High-Security Locks & Hardware

We install and service commercial-grade locks built to resist drilling, picking, and unauthorized duplication. Choose from trusted brands like Medeco, Mul-T-Lock, ASSA, and Schlage Primus for peace of mind and lasting protection.

Close-up of a dark wood door with a silver handle and locking mechanism. A key is inserted.
Close-up of a gray safe door with a black digital keypad, handle, and a silver button.

Commercial Safe Services

From cash drops to sensitive documents, our safe services keep your most valuable assets secure.


We provide:

  • Sales & installation of commercial-grade safes
  • Electronic safe upgrades & combination resets
  • Maintenance & repairs on fire-rated, drop, and GSA-approved safes

  • Emergency Locksmith Services – 24/7 Availability

    A lockout or broken lock can stop business in its tracks. That’s why we’re available day or night for fast, reliable emergency service. Whether it’s a jammed electronic lock, lost keys, or a damaged door mechanism, our technicians respond quickly to restore access and secure your property so you can get back to work.

  • Compliance & Security Assessments

    Security isn’t just about locks—it’s also about safety and compliance. We provide on-site evaluations that ensure your property meets ADA accessibility requirements, fire codes, and insurance standards. Our team installs panic bars, exit devices, and automated door openers to keep your business secure and accessible.

  • Re-Keying & Ongoing Security Updates

    Employee turnover, misplaced keys, or a break-in can compromise your business. Re-keying offers an affordable way to restore security without replacing all your hardware. Our locksmiths can re-key your entire building in one visit, giving you new keys and renewed confidence in your access control.

Person in blue uniform using a power drill to install a metal door handle.
Keys in the lock of a partially open wooden door with a green, blurred background.
Man in blue shirt and cap fixing a door lock with a screwdriver.

Who We Serve

We provide commercial locksmith services for a wide range of industries:

  • Office buildings & co-working spaces
  • Retail stores & shopping centers
  • Restaurants & hospitality businesses
  • Warehouses & industrial sites
  • Healthcare & medical facilities
  • Schools & educational institutions