Customers that purchased the AAS 100 wireless alarm system said they loved not having a monthly bill, and the alarm system was easy to install. As of January 2010, the AAS 100 Wireless Home Security Alarm System was listed at £116. 90 on Amazon. com. The cost of home security systems depends on the equipment, plan, installation and more. Most of these costs include home security equipment such as security cameras, video doorbells and sensors. Your monthly home security cost can also include 24/7 professional monitoring services, security camera footage cloud storage and the ability to control your home security system using your security provider’s mobile app. You’ll be able to easily manage your smart lights, thermostat and other home security gadgets. With all of these features, it is easy to wonder, how much is this really going to cost?Today, the average monthly cost for home security monitoring services ranges from $15/month to $35/month. for a plan with additional features and equipment. Monitored home security systems come with professional monitoring services to watch over your home 24/7 to alert you and emergency responders if a sensor is triggered to help protect your valuables from burglaries, fire and smoke detection.