Whether brand new or relatively new, if you buy a home which is completely built you probably don't need to hire an electrician to move in although you may need a few customization made to allow for the needs of your family. If you buy a house as the contractor is finishing it with time to allow for your input on final details, he probably already has an electrician lined up for the job. If you build a house yourself, or hire a contractor to build your plans on your lot, you'll have more input toward the project and may decide to hire your own electrical contractor rather than using the one recommended by the general building contractor.
Home fires are much more common than many homeowners think. What's even more alarming is the fact that tens of thousands of those residential fires are caused by the home's electricity. In fact, the National Fire Protection Association in the United States says that between 45,000 and 50,000 fires in the home since 2000 have been caused by defective electrical wiring. Those electrical fire hazards have taken the lives of hundreds of people each year and cost over $1 billion in property damage.