Haw. Rev. Stat. § 514B-35: Unit boundaries.

Except as provided by the declaration:

(1) If walls, floors, or ceilings are designated as boundaries of a unit, all lath, furring, wallboard, plasterboard, plaster, paneling, tiles, wallpaper, paint, finished flooring, and any other materials constituting any part of the finished surfaces thereof are a part of the unit, and all other portions of the walls, floors, or ceilings, are a part of the common elements;

(2) If any chute, flue, duct, wire, conduit, or any other fixture lies partially within and partially outside the designated boundaries of a unit, any portion thereof serving only that unit is a limited common element appurtenant solely to that unit, and any portion thereof serving more than one unit or any portion of the common elements is a part of the common elements;

(3) Subject to paragraph (2), all spaces, interior non-loadbearing partitions, and other fixtures and improvements within the boundaries of a unit are a part of the unit; and

(4) Any shutters, awnings, window boxes, doorsteps, stoops, porches, balconies, lanais, patios, and all exterior doors and windows or other fixtures designed to serve a single unit, but are located outside the unit's boundaries, are limited common elements appurtenant exclusively to that unit.