Material list for preliminary pricing

[Evolution]

The building committee chair asked for a material list that could be used to have subs start preliminary pricing. I'm pretty sure I know the answer as to how accurate it may be as well as how to segrigate it to the addition only. Since I've been building for 60 years, I know the process and can advise the chairman the list will not be fully comprihensive and some assumptions will need to be made, such as what to include for demo of parts of the existing building, any temporary roof(ing) etc., potential unknown's such as electrical l/ mechanical oads being added vs existing panel spares vs adding a sub-pnl etc. all of the items that will marry the existing with the expanded sanctuary. I used a room divider to separate the existing from the new construction, and named it the Sanctuary Expansion, I can do a material list for the room (sanctuary expansion) and that should (or at least it appears) to include the exterior finish materials and interior as well. That sound correct?