Screening and buffers shall be required in any industrial or business district which adjoins a residential district as follows: this strip shall be at least 35 feet in width; it shall contain a screen of plantings in the center of the strip. The screen shall be not less than five feet in width and six feet in height at the time of occupancy of such lot. Individual shrubs or trees shall be planted not more than three feet on center and shall thereafter be maintained by the owner or occupants so as to maintain a dense screen year round.

At least 50% of the plantings shall consist of evergreens. A solid wall or fence, not to exceed six feet in height, complemented by suitable plantings, may be substituted for such landscape buffer strip by special permit. The strip may be part of the yard area.

Where an "I" or "B" District abuts an "R" District, no building within the "I" or "B" District shall be within 25 feet of the boundary line of the "R" District.

Existing and permitted residential uses in the "B" or "I" District shall be subject to the dimensional density regulations of the nearest residential district as determined by the Building Commissioner/Zoning Enforcement Officer or, in the case of an age-restricted adult village as authorized under § 305-11.08, shall be governed by the dimensional density regulations set forward therein and as approved by the SPGA.

Except for planned developments, community facilities, and public utilities, only one principal structure shall be permitted on a lot. In the case of planned developments, the minimum distance between the walls of such principal buildings which contain windows shall be twice the minimum side yard or side setback required in the district.

A corner lot shall have minimum street yards which shall be the same as the required front yard depths for the adjoining lots.

At each end of a through lot, there shall be a setback depth required which is equal to the front yard depth required for the district in which each street frontage is located.

Projections into required yards or other required open spaces are permitted only as follows:

The provisions of this bylaw governing the height of buildings shall not apply to chimneys, elevator bulkheads, electronic equipment, elevator shafts, and other necessary appurtenances usually carried above the roof; nor to domes, towers, stacks or spires, if not used for human occupancy and which occupy not more than 20% of the ground floor area of the building; nor to ornamental towers, observation towers, radio broadcasting towers, television and radio antennae, and other like structures which do not occupy more than 20% of the lot area; nor to churches or public, agricultural or institutional buildings or buildings of private schools not conducted for profit that are primarily used for school purposes; provided, however, that the height of all structures exempted by this subsection shall not be more than four times the distance between the nearest lot line and the point directly below the specific structure and further provided the excepted appurtenances are not located within the flight paths of an airport as defined by Federal Aviation Administration regulations. Any proposed communications tower that exceeds the height requirements set forth in § 305-6.02 must file for a special permit with the SPGA.

The maximum gross floor area for a commercial establishment in the Neighborhood Business District shall be 8,000 square feet.

Where the existing development along a block amounts to more than 50% of the block frontage, and where said development has an average setback less than that required by this bylaw, then any vacant lot setback may be reduced to said average of the existing development.

In all districts the lot width shall not be less than that prescribed in the Table of Dimensional and Density Regulations as measured at any point between the front lot line and the rear building line.

At no street intersection in any district shall any obstruction to vision exceeding three feet in height above the plane established by the intersecting streets be placed or permitted to grow on any lot within the triangle formed by the lot lines abutting the intersecting streets and a line connected points on these lot lines at a distance of 25 feet from the point of intersection of the lot lines.

A fence, hedge, wall, sign or other structure or vegetation may be maintained on any lot provided that in the front yard area, no such structure or vegetation shall be over three feet in height above the adjacent ground within five feet of the front lot line unless it can be shown that such structure or vegetation will not restrict visibility in such a way as to hinder the safe entry of a vehicle from any driveway to the streets.

In all residential areas where buildings other than single-family dwellings are constructed, a buffer zone of 35 feet must be provided as described in § 305-6.05.

When floodproofing an existing home on a preexisting nonconforming residential lot, one single-story thirty-two-square-foot utility addition (bump out) located on the first floor may project into the side or rear setback. The utility addition is only for utilities such as furnaces, water heaters and/or HVAC systems and shall be above the minimum flood elevation. The owner shall provide the Building Department with proof of recording of a restrictive covenant on said utility addition prior to the issuance of the building permit. A minimum setback of five feet shall be maintained from the property line.

Projections into required yards or other required open spaces for residential lots under 5,000 square feet in size shall be covered through the issuance of a special permit or variance.