Look at the whole exterior
Discuss rooflines, window proportions, siding, trim, and the relationship between old and new construction. A larger living room, bedroom suite, or garage apartment should be evaluated as part of the property’s overall composition.
Explore the interior connection
An attached suite needs a thoughtful route from the existing home. A separate ADU needs an independent arrival. A garage apartment needs a suitable structural and access strategy. Existing conditions should guide the comparison.
Coordinate design and review
Nantucket’s Historic District Commission describes its review of proposed construction and alterations, including size, shape, and siting. Confirm which reviews and submissions apply with the town and your design team before treating a concept as buildable.
Make island assumptions visible
Ask how freight, deliveries, equipment access, crew mobilization, and storage are included in the proposal. The mainland budget illustrations on our site are not Nantucket prices; your project needs a separate island estimate.
Prepare for the first conversation
Bring your address, existing drawings or survey if available, photos of the exterior and affected rooms, and a clear list of priorities. We can then discuss construction scope and questions for the design team.
Helpful official resources
Reviewed October 2026. Confirm current requirements and project eligibility with the relevant offices. This guide offers planning questions, not property-specific approvals or construction pricing.