Who Is Responsible for What in a New Home or Property Build?

Map new-build responsibilities in writing before treating the project as one settled scope. Identify who supplies design, engineering, site information, regulated-trade work, owner selections, and approvals. For each handoff, record the document or decision required and who receives it. A contractor’s general involvement does not establish an in-house design team or responsibility for every outside service.
Planning an Addition on an Occupied Property: Access and Separation Questions

Before planning to occupy a property during an addition, discuss separate routes for occupants and construction, the transition through the existing wall, utility interruptions, and temporary arrangements. Record where normal use may stop and who approves each change. Staying on site depends on the work and professional review; an addition does not guarantee uninterrupted access or safe occupancy throughout construction.