How have you worked with your builder in selecting a level of finishes, for a custom home where you want very specific finishes.

Looking to see how others have dealt with their builder in selecting their level of finishes, tile, flooring, trim, bathroom fixtures, lighting fixtures.

I know there is no standard answer just wondering how others have handled it.

Looking for very specific styles and quality. Also don’t feel like paying a markup if I am providing the specific materials to the site. I also understand that labor can vary depending on the material provided. So I want to be fair but also don’t feel like I should be paying a huge markup if we are comparing apples to apples in installation time and the big variable is the style and quality of product being installed.

One thought I had was seeing if a builder would handle site work, foundation, utility connections, framing, and everything to get building weathered in then taking the project from there. Is this something a reputable good builder would agree to or would they tell me no because the profit margin is not there?