If you own a house in South Africa, local security services are your best choice. Ask locals which one is the best in your area, and find out about neighbourhood crime watch in the area.
Local security services offer a range of skills from digital security equipment to installing an alarm system in your house. Fences and burglar bars in front of the windows are normally included when buying a house.
Other than that, a big dog and a sign on the front porch saying “Beware of the dog” will definitely leave an effect on potential burglars.