Compare the complete scope before comparing prices
A shell quote and a turnkey proposal can leave different costs for you to pay. Mark each item included, excluded or unknown, then add an allowance for work outside the contract. Unknown scope remains a question for the builder; it should not be treated as free.
Read the builder quote comparison checklist for questions to ask before choosing a contractor. The shell versus turnkey guide explains common scope differences. Keep your original project budget alongside the proposals.