Control Who Enters. Know Who's There.
Protect your people, property, and sensitive areas with a professionally designed commercial access control system that gives you precise control over who enters your building — and when. USA Alarm Systems designs, installs, and services access control for businesses throughout Los Angeles County.
More Than a Lock. A Complete Access Management System.
Modern access control goes beyond keys and locks. USA Alarm Systems brings credential management, remote control, real-time alerts, visitor tracking, and audit reporting together into one integrated platform — giving you precise control over who enters your facility and complete visibility into access activity.
Keycard & Fob Readers
Reliable credential-based access
Proven keycard and key fob technology delivers fast, reliable door access for employees and staff. We select commercial-grade readers designed for high-traffic environments, with options for wall-mounted, mullion, and pedestal mounting based on your door configuration.
Mobile Credentials
Unlock doors with your phone
Modern mobile credential systems let employees unlock doors with their smartphone — no keycard needed. Bluetooth and NFC-based access is convenient, secure, and eliminates the cost and hassle of replacing lost cards.
Visitor Management
Professional check-in and tracking
Digital visitor management replaces paper sign-in logs with a professional, branded check-in experience. Visitors sign in on a tablet, receive a printed badge, and the host is automatically notified — with complete visitor logs for compliance and security.
Biometric Access
Highest-security credential verification
For high-security areas like server rooms, labs, and restricted zones, biometric readers verify identity using fingerprints or other unique traits — eliminating credential sharing and providing the highest level of access certainty.
Cloud-Based Management
Manage from anywhere
Cloud-based access control platforms let you manage users, doors, schedules, and alerts from any web browser or mobile app. No on-site server required — updates happen automatically, and your data is securely backed up.
Real-Time Alerts
Know the moment something happens
Receive instant notifications when a door is forced open, when access is denied, when a door is left ajar, or when after-hours access occurs. Real-time alerts keep you informed about critical access events at your facility.
Find the Right Access System for Your Business
Answer a few quick questions about your property and priorities. We'll recommend credential types, reader counts, access zones, and smart features tailored to your needs.
1. What type of building do you have?
This helps us determine standard entry points, risk zones, and layout requirements.
We're Local to the Businesses We Protect
Hover or click a region to explore commercial security & fire alarm services in your area. Our Monrovia HQ means we're minutes — not hours — from your building.
Commercial Security Coverage Throughout Los Angeles County
Our local service area means your security company isn't hundreds or thousands of miles away. Our technicians work throughout these communities and bring valuable local knowledge to every project.
Access Control Designed for the Way You Operate
A medical office has different access requirements than a warehouse or a multi-tenant building. USA Alarm Systems starts by understanding your property, people, and security concerns — then we design the access control system around the way your business actually works.
Employee access control, visitor management, and after-hours security
Staff entry control, stockroom access, and opening/closing schedules
Restricted zone access, loading dock control, and inventory protection
Equipment room security, safety zone access, and compliance logging
HIPAA-compliant access, patient area restrictions, and pharmacy security
Tenant-level access control, shared-area management, and audit trails
Employee access control, visitor management, and after-hours security
Staff entry control, stockroom access, and opening/closing schedules
Restricted zone access, loading dock control, and inventory protection
Equipment room security, safety zone access, and compliance logging
HIPAA-compliant access, patient area restrictions, and pharmacy security
Tenant-level access control, shared-area management, and audit trails
Control Access to Your Business With a Local Company That's Been Here for Decades
Your access control system should do more than unlock doors. It should give you precise control, complete visibility, and confidence that experienced professionals are there when you need them.
Serving Los Angeles County, San Gabriel Valley, San Fernando Valley & Santa Clarita Valley.
Access Control FAQs
Have questions about commercial access control? Here are answers to some of the most common questions we hear from Los Angeles business owners.