Moving into a new home or business usually comes with keys, paperwork and a long list of things that need attention.
The existing security system should be near the top of that list.
An alarm panel on the wall or cameras around the property do not necessarily mean the property is actively protected. You may be inheriting old access codes, inactive monitoring, outdated equipment, former employees or homeowners with app access, or devices that no longer communicate properly.
Before relying on an existing security system, use this checklist to understand what you have, who has access and what should stay or be replaced.
1. Start With a Complete Security Walkthrough
Before changing equipment, identify what is already installed.
Walk the entire property and look for:
- Alarm panels and keypads
- Door and window sensors
- Motion detectors
- Glass-break sensors
- Indoor and outdoor security cameras
- Video doorbells
- Smoke, heat and carbon monoxide detectors
- Smart locks
- Garage or gate controls
- Water or leak sensors
- Access control readers
- Any security hubs, network equipment or communication modules
Take photos of equipment you do not recognize. If possible, note the manufacturer and model number.
Then test the devices you can safely test. Open protected doors and windows. Check camera feeds. Confirm motion sensors are registering activity. Look for low-battery warnings, disconnected devices or error messages on the alarm panel.
Q: Can I assume an existing alarm system still works?
A: No. Equipment can remain physically installed long after monitoring has been canceled, batteries have failed or communication equipment has stopped working. The system should be tested before you rely on it.
2. Find Out Who Can Still Access the System
This is one of the easiest security problems to overlook.
A property may have accumulated years of authorized users.
For a home, that could include former owners, housekeepers, contractors, relatives or neighbors.
For a business, the list can be much longer: former employees, managers, vendors, cleaning crews, maintenance personnel and temporary workers.
Change or review:
- Master alarm codes
- Individual user PINs
- Smart lock codes
- App users
- Camera accounts
- Email addresses associated with the system
- Emergency contacts
- Verbal passwords used with the monitoring center
Whenever possible, give each authorized person an individual credential instead of sharing one universal code. That makes access easier to manage and creates a clearer record of who is entering the property.
Q: Should I change the alarm code when I buy a house or take over a business location?
A: Yes. You generally do not know how many people received the old code. Creating new credentials and deleting previous users is one of the first steps to securing the property.
3. Confirm That Professional Monitoring Is Actually Active
An alarm can make noise without sending an alarm signal anywhere.
If the property has existing security equipment, determine whether it is connected to professional monitoring and whether that account has been properly transferred.
Confirm:
- The monitoring account is active
- The correct property address is listed
- Emergency contacts are current
- Your phone numbers and email addresses are correct
- Old owners, tenants or employees have been removed
- The system can successfully transmit an alarm signal
A monitored system should also be placed on test and verified with the monitoring provider rather than intentionally triggering an alarm without warning.
4. Decide What Can Stay and What Should Be Upgraded
Existing equipment does not automatically need to be ripped out.
A professional security company may be able to reuse portions of an existing system, particularly sensors, wiring or compatible devices that are still in good condition.
Keeping existing equipment may make sense when:
- The equipment is still supported
- Sensors are functioning correctly
- Wiring is in good condition
- Cameras provide useful coverage and image quality
- The equipment is compatible with current monitoring technology
Replacement becomes more attractive when equipment is unreliable, unsupported or no longer fits the property.
Warning signs include:
- Frequent false alarms
- Damaged sensors
- Missing camera coverage
- Very old camera resolution
- Unsupported alarm panels
- Failed batteries
- Loose or damaged wiring
- Multiple disconnected apps or systems
- Equipment that cannot communicate reliably
The goal is not to replace equipment simply because it is old. The goal is to know which parts of the system can still be trusted.
Q: Can an older alarm system be upgraded without replacing everything?
A: Often, yes. A security professional can determine whether existing sensors, wiring or other components can work with newer controls, monitoring and connected security technology.
Home Security vs. Commercial Security: The Checklist Changes
Homes and businesses share some basic security principles, but they should not be evaluated the same way.
For a Home
Residential security is usually centered around a smaller number of users and several predictable entry points.
Priority areas typically include:
- Exterior doors and accessible windows
- Garage entrances
- Driveways and yards
- Package delivery areas
- Smoke and carbon monoxide detection
- Cameras around primary exterior approaches
- Mobile alerts when the homeowner is away
Convenience also matters. Homeowners may want smart locks, cameras, alarm controls and other connected devices available through a simple interface.
For a Business
Commercial security is usually more complicated because you are protecting people, property and operations while managing more users.
A commercial walkthrough should also consider:
- Employee entrances
- Customer entrances
- Restricted rooms
- Inventory and storage areas
- Cash handling locations
- Warehouses and loading areas
- Parking lots
- After-hours access
- Access control permissions
- Video retention requirements
- Commercial fire and life-safety systems
Employee turnover makes credential management especially important.
When someone leaves the company, their access should be removed promptly rather than waiting until codes are changed for everyone.
Access control can make this considerably easier by allowing a business to assign and revoke individual credentials instead of relying entirely on physical keys.
Q: What is the biggest difference between home and commercial security?
A: Commercial systems usually need to manage more people, more entry points and more defined permissions. A home may have a handful of trusted users. A business may need different access for employees, managers, vendors and restricted areas.
5. Check Your Camera Coverage, Not Just Your Camera Count
Four properly positioned cameras can be more valuable than ten poorly positioned ones.
Walk the property and ask what each camera actually shows.
Important areas often include:
- Main entrances and exits
- Driveways
- Parking areas
- Gates
- Side or rear entrances
- Delivery areas
- High-value inventory
- Cash registers or transaction areas
Look at the actual footage during both daylight and nighttime conditions.
A camera that provides a beautiful view of the roofline while missing the person’s face at the door is technically working. It is also not accomplishing very much.
6. Look Beyond Burglary Protection
A complete security review should also consider threats that have nothing to do with a break-in.
Depending on the property, that can include:
- Fire detection
- Smoke and heat detection
- Carbon monoxide detection
- Water leaks
- Temperature changes
- Power or communication interruptions
For businesses, properly designed fire and life-safety systems require particular attention. These systems should be evaluated according to the property’s use, layout and applicable requirements rather than treated as another smart-home accessory.
7. Have a Professional Test the Entire System
If you have inherited security equipment, you do not have to figure out every wire, sensor and model number yourself.
A professional inspection can determine:
- What equipment is installed
- What still works
- What can be reused
- Where security gaps exist
- Whether monitoring communication is working
- Whether cameras are positioned effectively
- Whether access permissions should be updated
- Which upgrades would actually improve security
That assessment is especially useful when a property contains equipment installed by multiple companies over several years.
Your Move-In Security Checklist
Before you consider the property fully secured:
- Inventory existing security equipment
- Test doors, windows, sensors and cameras
- Change alarm and smart lock codes
- Remove previous users
- Reset app and cloud access
- Confirm professional monitoring
- Update emergency contacts
- Review camera placement
- Check fire and life-safety devices
- Determine what equipment can be reused
- Schedule a professional inspection if you are unsure
The important question is not whether a property already has security equipment.
It is whether that equipment is working, properly monitored and controlled by the people who should have access today.
Need Help Evaluating an Existing Security System?
Secure Systems has protected homes and businesses throughout Bakersfield and Kern County for more than 40 years.
Our team works with residential and commercial security systems, burglar alarms, video surveillance, access control, fire systems and 24/7 alarm monitoring.
If you have moved into a property with an existing system, we can help identify what you already have, test the equipment, determine what can be reused and recommend upgrades where they actually make sense.
Contact Secure Systems to schedule a security assessment or request a quote.
