The ones I work with are doing renovations for customers that aren't looking to sell a final product. Some things are based on a standard that can be upgraded (

The ones I work with are doing renovations for customers that aren't looking to sell a final product. Some things are based on a standard that can be upgraded (for instance, a deck is being quoted with pressure treated wood, but you can upgrade to Ipe for $x for example. Otherwise all of this would have to be selected before a quote is generated. So a ballpark/estimate is given that assumed certain things (like an Andersen 400 series window) but ultimately it's up to the customer to figure out if they want doors that cost $200 or $2000 inside, etc. and the quote is exclusive of them. This is usually detailed in the SoW as "customer supplied".