The particle i can often indicate direction from something:
Kei te hīkloi au i te whare.
I am walking from the house.
However, in some cirumstances, i can mean "by", "at" or "in", depending on context.
Kei te hīkoi au i te whare.
I am walking in house.Kei te hīkoi au i te whare.
I am walking by the house.