Preheat the oven to 350°F (175°C). Grease a 9x5 inch loaf pan.
In a large bowl, whisk together the flour, baking soda, baking powder, salt, garlic powder, and oregano.
In another bowl, whisk the eggs, oil, and buttermilk until smooth.
Add the wet ingredients into the dry ingredients and stir gently until just combined.
Fold in the grated zucchini and cheddar cheese. Don’t overmix.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 45 to 55 minutes, or until a toothpick inserted in the center comes out clean.
Let it cool in the pan for 10 minutes before transferring to a wire rack to cool completely.