Duluth UDC § 203.06

1. Exceptions to Front Yard Requirements. a. Any lot where the average depth of the front yards of existing buildings on adjoining lots (which are located wholly or in part within 100 feet on each side of such lot, and are within the same block and zoning district and fronting on the same side of the street) is either greater or less than the minimum required front yard depth shall meet the following requirements: i. If the average depth of the adjacent front yards is greater than the required minimum front yard depth, the depth of the front yard of such proposed lot shall be the average of the adjacent front yards of the above-mentioned buildings but need not be greater than 150% of the required front yard depths. ii. If the average depth of the adjacent front yards is less than the required minimum front yard depth, the depth of the proposed front yard of such lot may be less than the required front yard depth but shall not be less than the average of the adjacent front yards of the aforementioned buildings. 2. Exceptions to Height Limitations. a. The height limitations of this Development Code shall not apply to the following structures nor architectural features: church spires, belfries, flag poles, monuments, cupolas, domes, ornamental towers, observation towers not intended for human occupancy, water towers, transmission towers, radio or television towers or aerials, chimneys, smokestacks, conveyors, derricks, parapet walls extending not more than 4 feet above the roof line of the building, necessary mechanical roof appurtenances or barns and silos when located on a farm.