A. Setbacks are measured from the outermost portion of the building to the nearest lot line or building as appropriate. Incidental architectural features such as window sills, cornices and eaves may not project into any required setback. This regulation also applies to cantilevered floors, decks or other similar building extensions. No building or structures may be located within a setback, except that fences may be constructed within the required setback by permit. The following items shall be exempt from setback requirements, provided the item is located to achieve its purpose without constituting a hazard to vehicles or pedestrians, is located such that it does not obscure sight angles at intersections or driveways, and is not in any location prohibited by state regulation:

Where more than one setback standard is applicable, the most restrictive setback standard applies.

B. Building height is measured from the grade plane to the highest point on the building, but not including chimneys, radio antennas, water towers, church spires, structures or enclosures constructed primarily for mechanical equipment and similar building mechanical features.

C. Buildings constructed to zero lot line must be designed so that snow falling from the roof is not deposited on adjacent properties.

D. The distance between unattached buildings must be 15 feet unless approved as a conditional use by the planning commission. Building separation is intended for public safety; fire-related concerns must meet the approval of both the State Fire Marshal and local fire department, where applicable. The 15-foot separation between unattached buildings applies only when at least one of the buildings is for human occupancy.

E. Additions to structures used for human occupancy shall have at least one exterior wall in common with the structure to which it is being added.

F. Setbacks from anadromous fish streams: See HBC 18.60.010(P).

G. Between Second Avenue and the intersection of Union Street and Main Street, all structures must be set back 20 feet from lot lines adjacent to Union Street. Due to its historical nature, Block 16, Haines Townsite Subdivision shall have special setbacks. All structures built within Block 16 must be set back a minimum of 10 feet from any property lines not abutting Union Street.

H. If a publicly owned road easement exists inside of a property line, the setback shall be measured from the easement line and not the property line.

I. If a public utility easement exists inside of a property line, the setback shall be measured from the easement rather than the property line and shall be not less than 10 feet unless a variance is granted by the planning commission.