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. The lowest basic ADT plan includes professional monitoring costs $28. 99/mo. It all depends on your home’s security needs. But bear in mind that if danger is detected, professional monitoring services will contact you first if a sensor is triggered. After the security provider has reached out to you and any emergency contacts they’ll contact the police on your behalf. So, the lag time between the triggered sensor and emergency responders getting to your home could be lengthy.