By installing your own home alarm system you will not only save money but have the satisfaction and pride that you installed the system yourself. The secret to every successful project is the planning stage and taking on a do-it-yourself home security project is no exception. Before you go out buying the alarm and sensors etc… draw out a plan layout of your home that indicates all of the areas within your home that you want to protect. Mark on your plan doors and windows and from this detail a list of exactly how many alarm sensor devices you will need.