Nearly everything you buy at a store or online is made before it’s sold. Construction is different. The job gets sold before work starts. That’s why an owner’s first question is likely to be about price. Experienced contractors anticipate the cost question and are ready with an answer that helps sell the job.
There’s no single best answer to the cost question. But quoting a price off the top of your head is a mistake. Even if you have a ballpark figure in mind, keep that number under your hat. Better answers include: