Preheat oven to 350°F. Butter two 8x4 loaf pans and set aside.
In a large bowl, rub together the sugar and lemon zest until moist and fragrant.
Beat in the softened butter until light and fluffy.
Add the eggs one at a time, beating well after each addition. Stir in the lemon juice.
Add the buttermilk and lemon extract and mix until just combined.
Fold in the chopped strawberries.
In a separate bowl, whisk together the flour, baking powder, baking soda and salt.
Add the dry ingredients to the wet ingredients and mix just until combined.
Divide the batter evenly between the prepared pans.
Bake for 30 minutes or until a toothpick inserted in the center comes out clean.
Allow loaves to cool for 5-10 minutes before removing from pans.