It is always better to protect than have to banish or destroy something in the end, and this spell has been used for centuries to keep homes safe. It mainly uses the element Earth. 

Home Protection Spell

What you’ll need: 

• Red Wine
• Three sandalwood incense sticks
• Three blades of grass 
• Olive oil
• Small bowl or mixing glass
• Small vial 

Go somewhere quiet, where you can be undisturbed and place your items on a flat surface. Center yourself and take a few minutes to calm your mind and relax your body. Put some red wine and three blades of grass into your olive oil, and pick up your bowl or mixing glass and say: 

"By the power of the Earth

By the life in the blade

Be thou protected

So mote it be”

Sprinkle a few drops of protection oil on a clean cloth and wipe over the front and back doors as well as your windows in your home. You can keep the remaining oil in a small vial and place on your altar. Can also be used as an offering. Best done on a Friday.

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If you don't want to go to the extreme measures of casting a spell for protection, a simple prayer may do the trick.