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. On the other hand, unmonitored home security systems will automatically notify you directly when a sensor is triggered. Once you’re notified, you’ll have to determine whether or not it’s a false alarm or if you should call emergency services. DIY home security systems are less expensive because most features and equipment are purchased upfront – such as SimpliSafe’s professional monitoring package is as low as $14. 99/mo. Once you’ve set up your home security system, you may need to add extra security cameras or sensors to monitor blind spots that may be out of range. Some home security companies sell additional equipment at a discounted rate if you’ve purchased their home security system. If not, adding additional equipment can be fairly inexpensive.