What a home security system costs in 2026 depends on five things: how many doors, windows and floors you need to cover, whether the system is wired or wireless, how many cameras you add and how they record, whether you pay for professional monitoring, and whether the system ties into the rest of your home. The equipment and installation are a one-time cost. Monitoring, cellular service and cloud video storage are monthly costs that add up over the years you own the system.
Here is how each piece affects the price, and where the costs people don’t expect tend to show up.
What drives the cost of a home security system?
Size and layout of the house
Every exterior door and accessible window needs a sensor, and each floor usually needs at least one motion detector. A three-story colonial with a walkout basement and a detached garage needs a lot more than a single-level condo. Large homes may also need wireless repeaters or extra keypads at the garage entry and the primary bedroom.
Wired or wireless
Wired sensors cost less per device and never need batteries, but running wire through finished walls takes labor. In new construction or a gut renovation, prewiring is the cheapest time to do it. Wireless sensors cost more per device and need batteries every few years, but they install quickly in a finished home. Many systems use both: wired where walls are open, wireless where they aren’t.
If the house already has hardwired sensors from an older alarm, a new panel can often take them over. That can save a good deal of labor.
DIY or professionally installed
DIY kits cost less upfront and suit a smaller home or an apartment. You place the sensors yourself and connect them to an app. A professionally installed system costs more because it includes design, wiring, programming and testing, and it usually has a more capable panel that can tie into locks, lighting and climate control. The installer should also stand behind the work if something stops working.
Equipment costs
A typical system includes:
- An alarm panel or hub, plus one or more keypads.
- Door and window contacts.
- Motion detectors and glass-break sensors.
- Smoke, heat and carbon monoxide detectors connected to the panel.
- Water leak and low-temperature sensors, which matter in a New England winter.
- A siren and a cellular communicator so the system can send alerts without a landline.
Cameras are often the largest single line. The cost depends on how many you need, whether they are wired or battery powered, their resolution and lens, and how they record. Our camera placement guide can help you work out how many your house needs before you ask for quotes.
Monthly costs
Professional monitoring
Professional monitoring is a service you buy from a central station monitoring company. When an alarm goes off, the station calls you and can send police or the fire department. Pricing varies by company and by what you include, such as fire, carbon monoxide and video verification. Some companies require a multi-year contract. Read the cancellation terms before you sign.
Self-monitoring costs nothing extra. The system sends alerts to your phone and you decide what to do. That works if you will always see the alert, which is a real question when you are traveling or asleep.
Cellular communication
Most systems now report over a cellular connection instead of a phone line, because cellular keeps working if your internet goes down or someone cuts the cable. The cellular service usually carries its own monthly fee, sometimes bundled into the monitoring plan.
Video storage
Cloud cameras usually charge a monthly plan per camera or per home to keep recordings. A network video recorder (NVR) in your home stores footage locally with no subscription. With more than a few cameras, an NVR usually costs less over time.
Costs people don’t plan for
- Alarm permits. Many towns require you to register a monitored alarm and charge fees for repeated false alarms. Check with your local police department.
- Activation or installation fees from monitoring companies.
- Replacement batteries for wireless sensors, and a new backup battery for the panel every few years.
- Network upgrades. Cameras and smart locks depend on solid Wi-Fi and wiring, and an older router may not keep up.
- Smoke and CO detectors that have reached their replacement date.
- Repairs after the warranty ends, if you don’t have a service plan.
How smart home integration affects the price
Connecting the alarm to a home automation system such as Control4, Savant or Lutron adds programming time and sometimes a module or license. In return, arming the system can lock the doors, turn off the lights, close the shades and set back the thermostats with one button, and you run everything from one app. If you already have an automation system, adding security to it costs much less than building both from scratch. Our guide to integrating smart security with home automation covers what that looks like.
Can a security system lower your insurance?
Often it can. Many homeowners insurers offer a discount for a monitored burglar and fire alarm, and some give an extra credit for water leak detection with an automatic shutoff. The amount varies by insurer. Ask your agent what they require, usually a certificate from the alarm installer or monitoring company, before you finalize the design.
How to get an accurate quote
- Walk the house and count exterior doors, ground-floor windows, floors and outbuildings.
- Decide whether you want professional monitoring or self-monitoring.
- Decide how many cameras you want and whether you prefer local or cloud recording.
- Ask each installer to list equipment, labor, programming and every recurring fee separately.
- Ask who owns the equipment. With some monitoring contracts, the company owns the panel or locks it to their service.
Once the system is in, protect it. Cameras and smart locks are only as secure as the network they sit on, and our guide to securing your home WiFi covers the basics.
Questions we hear often
Can I upgrade my existing system instead of replacing it?
Often you can. Existing wired sensors can usually stay, and a new panel or a takeover module can connect them to a modern app. Cameras and smart locks can be added later.
Is wireless always cheaper?
In a finished house, wireless usually costs less upfront. Over many years, wired sensors can cost less because they don’t need batteries, and in new construction prewiring is inexpensive.
Do I need a contract?
Only if you choose a monitoring company that requires one. Plenty of monitoring companies offer month-to-month plans, and self-monitored systems need no contract at all.
Planning a home security project?
We design and install security systems, cameras and smart locks that work with your lighting and home automation, for homes across Greater Boston, the South Shore and Rhode Island. Book a free consultation or read more about our home security systems.
