A: Always ask for detailed, line-item estimates instead of one big lump-sum quote. That way, you can see exactly what you’re paying for and compare contractors fairly. On top of your total budget, set aside an extra 10–15% for surprises — older homes especially tend to hide problems once the walls come down. Finally, make a list of your must-haves and nice-to-haves before you start. That way, if costs go up, you already know what you can cut without losing sleep over it.