Home Security System Cost in California (2026) — Hardware, Monitoring + Install
A DIY home security system for a California house costs $250-$600 in hardware, $0-$35 a month for monitoring, and $149-$299 for professional installation if you want it. A contract company charges $0-$200 up front and $40-$60 a month for three years, which is $1,500-$2,200 over the term for the same protection. Full breakdown below.
The price of a home security system is three numbers, and the companies that sell them make sure you only see one at a time. Hardware, monitoring and installation. This guide puts all three on the table for DIY kits and contract companies so the comparison is honest, then shows what a typical California house actually ends up spending.
Quick Comparison
| Pick | Best For | Approx Price |
|---|---|---|
| Best Value System | SimpliSafe 12-Piece Wireless Home Security System | $330-$420 |
| Best Budget | Ring Alarm 5-Piece Kit (2nd Gen) | $150-$200 |
| Best Outdoor Camera | Reolink 4K PoE Security Camera | $60-$100 |
Our Picks
Hardware: What a Real House Needs
| Component | DIY price | Typical count |
|---|---|---|
| Base station and keypad | $100-$200 | 1 |
| Entry sensor | $15-$20 | 10-14 |
| Motion sensor | $30-$40 | 2 |
| Glass break sensor | $35-$45 | 1-2 |
| Video doorbell | $100-$220 | 1 |
| Outdoor camera | $100-$200 | 1-3 |
| Smart lock | $150-$250 | 1 |
The 8-piece starter kits at $200-$300 cover a small condo. A three-bedroom house with 12 openings and a doorbell lands at $450-$700 in hardware, and closer to $1,000 with two outdoor cameras and a lock.
Monitoring: Monthly Costs by Type
- Self-monitoring: $0. The app alerts you; you call the police.
- DIY professional monitoring: $20-$35 a month, month to month, cancel anytime. SimpliSafe, Ring, Abode, Arlo.
- Contract monitoring: $40-$60 a month on a 36-month agreement. ADT, Vivint, Brinks. Often includes cameras and a touchscreen panel you do not own until the term ends.
Over three years, DIY monitoring costs $720-$1,260. Contract monitoring costs $1,440-$2,160 plus whatever the early-termination clause says if you move.
Installation: DIY vs Handyman vs Company Tech
The DIY kits are designed for peel-and-stick installation, and the sensors work that way. What people pay for is getting them straight, hidden from the outside, and mounted with screws where adhesive will fail on a textured wall or a hot garage door. Our pricing across all of California: $149-$249 for a kit setup with sensor mounting and app configuration, $99-$149 for a video doorbell on existing wiring, $129 per outdoor camera. Contract companies quote $99-$199 for installation and often waive it against the contract.
Permits and False Alarm Fees
Most California cities require an alarm permit before a monitoring company can dispatch police, typically $25-$50 a year, with false alarm fines that start around $100 after the first or second free one. The permit is the homeowner's job, not the alarm company's. Self-monitored systems that never dispatch do not need one in most cities.
Budget $25-$50 a year for the permit if you use professional monitoring, and expect a $100-$250 fine for repeated false alarms. Pet-immune motion sensors and correct entry sensor placement prevent most of them.
Three-Year Total Cost, Three Ways
| Path | Hardware | Install | Monitoring, 36 mo | Total |
|---|---|---|---|---|
| DIY, self-monitored | $500 | $0 | $0 | $500 |
| DIY, pro monitored, handyman install | $500 | $200 | $1,000 | $1,700 |
| Contract company | $100 | $100 | $1,800 | $2,000 plus you may not own the hardware |
Where to Save and Where Not To
Save on cameras: two well-placed outdoor cameras beat six. Save on the smart lock if nobody needs remote entry. Do not save on entry sensors; skipping the back windows is how the system fails. Do not save on cellular backup if you use monitoring. And do not sign a contract to save $200 on hardware; the math never works.
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Get a Security Install Quote →Frequently Asked Questions
How much does a home security system cost per month?
$0 self-monitored, $20-$35 for DIY professional monitoring, $40-$60 on a contract plan.
How much does it cost to install a security system?
$149-$299 for a handyman to mount a DIY kit and configure the app across all of California. Contract companies quote $99-$199 and often waive it against the agreement.
Is a contract alarm company worth it?
Rarely. Over three years a contract costs $500-$1,000 more than a DIY system with the same monitoring, and you may not own the hardware.
Do I need an alarm permit?
For monitored systems in most California cities, yes: $25-$50 a year. False alarm fines run $100-$250 after the first free one.
What does a full house cost in hardware?
$450-$700 for a three-bedroom house with sensors on every opening and a video doorbell; near $1,000 with two outdoor cameras and a smart lock.
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