-alarm-system.html">Adding an extra indoor security camera can cost upwards of $100 or an extra door sensor can cost around $30. Before buying more equipment, make sure you know how many home security devices each control panel or hub can accommodate at once. Also, if you’re installing add on equipment, ask about any additional fees such as extra cloud storage for security camera footage. If you’re not buying the security gadget upfront, ask about the leasing price and any additional terms. One thing that is necessary is a professional monitoring option, which is available on all of the best home security systems. These monitoring plans require monthly subscription fees that vary in price, but they are still cheaper than traditional home security plans. Further, having a monitored security system installed in your home also qualifies for a discount on most home insurance plans, which can offset some of the cost of the subscription fee. In my experience, the discount on my home insurance covered about 25 percent of the subscription of an average plan, but your mileage may vary depending on your location and the size of your home. The system will work without a professional monitoring plan, but SimpliSafe offers two no contract plans that include both police and fire department alerts. The basic $15 per month plan supports all of the SimpliSafe’s sensors, has 24/7 monitoring, and cellular backup in case your Wi Fi network goes down. The more expensive $25 per month plan adds the ability to control the system from your phone, unlimited backup recording for SimpliSafe’s cameras, and smart home integrations.