A home addition proposal should help you understand what will be built and how the work will be managed. Comparing totals before comparing scope can hide important differences. Start with the same priorities and the same available drawings, then ask each team to explain the boundaries of its proposal.
Confirm the design information behind the price
Identify the drawing version, specifications and site information used. A preliminary concept and a coordinated construction set do not describe the work at the same level of detail. Ask which parts are established and which remain provisional.
If one proposal assumes a particular window arrangement or structural approach, make that assumption visible in your comparison. The aim is to understand the proposed solution, not simply to line up totals that refer to different projects.
Read the connections and exclusions carefully
Look for the work where the addition meets the existing house. Interior repairs, flooring transitions, exterior finishes and changes to existing systems deserve explicit descriptions. Also identify what happens to areas used for access and material storage.
Make a short comparison table with included work, excluded work and items requiring clarification. Avoid filling gaps with verbal assumptions; request a written clarification before making a decision.
Understand selections and responsibilities
Review allowances alongside expected quality, quantities and installation scope. Ask who orders each item, who confirms dimensions and how a delayed selection affects the schedule. Owner-supplied items need the same coordination as items purchased by the contractor.
Confirm how design, engineering, permit coordination and inspections are assigned for your project. The exact arrangement can vary, so clarity matters more than assuming every team works in the same way.
Ask how the plan responds to change
Find out how proposed changes are documented, priced and approved before work proceeds. Ask how concealed conditions are communicated and how their effect on cost or timing is evaluated. A practical process should give you a clear decision point.
Finally, discuss communication: your main contact, meeting rhythm and the record of decisions. A proposal is the beginning of a working relationship. Understanding how you will collaborate is part of evaluating it.
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