The peace of mind that comes with a household security system can hardly be replaced. Unfortunately, many homeowners are discouraged by the high monthly cost of many commercial alarm companies. The solution for some is a do-it-yourself project.

The project should be thoroughly planned and executed to ensure there are no gaps in the security system, and that all windows and doors are covered. Motion detectors and glass-break sensors can be added for more complete coverage. Installing a complete home security system can be done in as little as 1 to 2 days, depending on the size of the home and complexity of the system.

1 Purchase the components for your system. A total alarm kit is much easier than piecing together individual components, and basic systems can be had for 100 to 200 dollars. If you require a completely custom system, you can buy the system in individual pieces, but it is still easier to purchase a kit and then add on extra components if needed. These systems can be purchased through eBay, a number of online retailers, or even some local security stores (see Resources below).

2 Assemble a plan of attack for your house. It is absolutely essential that every single exterior door and window is covered by a sensor. If possible, glass break sensors should be positioned over any large glass doors or sets of windows, and motion detectors should be placed around the main areas of your home, such as the living room and hallway. Try to think like an intruder, and place sensors in areas they would first try when breaking in.

3 Install the sensors across your home. If you purchased a wireless system, your job may be as simple as adhering each sensor into place and turning it on. Wired components are much more difficult to install, because a line to each one must be run through the wall. By removing the baseboards, you can often run the wiring along the floor and hide it by replacing the baseboards. Each line should run back to a common area where the central unit or keypad will be installed.

4 Connect the wires (if applicable) to the central alarm unit, where the sensors, keypads and the siren itself communicate with each other. This unit will also be where accessories such as battery backup and telephone broadcasting connect. This box should be mounted in a location not easily accessed by unwelcome guests, such as a utility room or closet. A secure lock will further hinder any tampering.

5 Install the keypad, which is where the entire system will be controlled. These allow you to enter your private code to enable either complete protection or perimeter protection (door and window sensors only), which comes in handy for night use. Any communication or configuration of the system will be done through the keypads, so you want to make sure they are in a convenient location. You should be able to easily access a keypad from your most commonly used entrance door, so you can disable it before it goes off.