A principal building or a principal use permitted in an R-1 or R-2 Residential District or in a C Commercial District. (Buildings or uses permitted in an R-1 or R-2 Residential District by special exception are permitted as of right in a C-1 Special Commercial District, and no special exception permission by the Zoning Hearing Board is necessary or required.)

Service echelon establishments: storage buildings, warehouses or storage yards for the storage of goods, products or items.

Retail or wholesale jobbing or distributing establishments.

Lumberyards or building supply houses which primarily sell at retail or wholesale such items as lumber, brick, cement, concrete or the like, or such items as building, plumbing or electrical equipment, materials, supplies and the like.

Farm supply or equipment houses which primarily sell at retail or wholesale farm equipment, fertilizers, farm supplies and the like.

Any other use which is substantially similar to a use described above in this Subsection A.

Exception. Provided that any applicable regulations in § 240-40 are met, and an exception to the on-lot parking spaces requirement is granted by the Department under § 240-41B, the building area on a lot used for a principal building set forth below may exceed 70% of the lot area:

The principal buildings which may take advantage of this exception are a church, library, museum, school, nonprofit or municipal or public institution for other than correctional or rehabilitative purposes or diagnostic or treatment purposes, fraternal club, private lodge, or a building for a protective service under § 240-29A(11).

Community garage, tourist cabin court or motel, trailer camp, trailer court or mobile home park, public garage, service station, repair garage, car wash, or automobile sales room shall have a front yard, the depth of which to the building line shall be not less than 25 feet. However, in the case of a community garage on a reverse lot, the yard abutting the alley shall be deemed to be the front yard, and the depth of that front yard to the building line may be reduced to five feet.

Except as provided in § 240-40A(1), no front yard shall be required in the case of any other principal building or principal use.

If the building height of a principal building is over 35 feet, the building shall have two side yards (one at each side of the building, but not necessarily at building grade or ground level). Each side yard shall be measured from the side line of the lot to the side line of the building at the floor level of the first story above 35 feet, and each such side yard shall be not less than six feet wide. However, in the case of a building on a corner lot at the intersection of two streets, the intersection of a street and a public alley, or the intersection of a street and a public mall, no side yard on the street, alley or mall side shall be required.

Except as provided in § 240-40B(1) and D, no side yards shall be required in any other case.

If the building height of a principal building is over 35 feet, the building shall have a rear yard (but not necessarily at building grade or ground level). The rear yard shall be measured from the rear line of the lot to the rear line of the building at the floor level of the first story above 35 feet, and such rear yard shall be not less than five feet deep.

Except as provided in § 240-40C(1) and D, no rear yard shall be required in any other case.

For a principal building or a principal use permitted in an R-1 or R-2 Residential District, off-street parking spaces shall be provided as required by § 240-20A or 240-27A, as the case may be.

For a hospital, convalescent or nursing home, or institution referred to in § 240-29A(2), off-street parking spaces shall be provided as required by § 240-20A(5), 240-27A(4) or (7), as the case may be.

For a day nursery, day-care center, or school referred to in § 240-29A(3), off-street parking spaces shall be provided as required by § 240-27A(6).

For a fraternal club or private lodge referred to in § 240-29A(4), off-street parking spaces shall be provided at the rate of one parking space for each 300 square feet of floor space used for dining rooms, game rooms, lounges, meeting rooms and assembly rooms.

For a fraternal home, off-street parking spaces shall be provided at the rate of: one parking space for each of the first four boarding or rooming units; one parking space for each three boarding units or rooming units in excess of four; three parking spaces for the manager or administrator; and one parking space for each two employees on the largest work shift.

For a hotel or tourist home, off-street parking spaces shall be provided at the rate of one parking space for each boarding or rooming unit; one parking space for each two employees on the largest work shift; and one parking space for each 300 square feet of floor space used for dining rooms, taverns, meeting rooms and assembly rooms.

For a tourist cabin court or motel, off-street parking spaces shall be provided at the rate set forth in Subsection A(6) above.

For a trailer court or mobile home park, one off-street parking space shall be provided for each house trailer or mobile home lot.

For a trailer camp, one off-street parking space shall be provided for each campsite.

For an automotive service establishment housing a public garage, service station, repair garage, car wash, automobile sales room or the like, off-street parking spaces shall be provided at the rate of one parking space for each two employees; one parking space for each passenger or commercial motor vehicle used in connection with the business (such as tow trucks, wreckers, demonstrator models); one parking space for each vehicle kept in storage or for lease or sale; and one parking space for each repair bay (in addition to the bay itself).

For a protective service building, off-street parking spaces shall be provided at the rate of one parking space for each employee on the largest work shift; one parking space for each passenger or commercial motor vehicle regularly kept on the premises in connection with the protective service; and one parking space for every four volunteers.

For a cat or dog boarding kennel or small animal hospital, off-street parking spaces shall be provided at the rate of one parking space for each veterinarian and one parking space for each two employees on the largest work shift.

For a service echelon establishment, off-street parking spaces shall be provided at the rate of one parking space for each two employees on the largest work shift and two parking spaces for each passenger or commercial motor vehicle used in connection with the business.

For a mixed occupancy dwelling, the off-street parking spaces required shall be the number of spaces required for that type of use (having dwelling, boarding or rooming units) which the upper stories of the mixed occupancy dwelling most nearly resemble.

For all other principal buildings or principal uses, off-street parking spaces shall be provided at the rate of one passenger vehicle parking space for each two employees (based on the maximum number of employees employed during any one six- to eight-hour period or shift during a calendar year); and one parking space for each passenger or commercial vehicle used in connection with the use of the premises; and one parking space for each 300 square feet of floor space related to any retail use of the premises.

If in the opinion of the Department the physical circumstances or condition of the lot (such as the topography, slope or drainage of the lot or the irregularity, narrowness or shallowness of the lot in size or shape) preclude the safe design, construction or maintenance of off-street parking spaces, maneuvering areas or means of access, or make the same impractical; or

If in the opinion of the Department the requirement that all of the off-street parking spaces to be provided on the lot would require that the maximum building area permitted by § 240-40A or B be decreased (or would require that the increase in the maximum building area otherwise permitted by the exception to § 240-40A be denied) in order to accommodate the parking spaces, and provided that the Department is satisfied that such yard regulations in § 240-40 as are applicable will be met, the open space fire aisle requirement in § 240-51 will be met, and in a case within the exception to § 240-39A, all conditions for the exception will be met, the requirement that all of the off-street parking spaces are to be provided on the same lot with the principal building or principal use may be modified or waived by the Department to the extent that it can be shown (upon such evidence as the Department deems sufficient) that off-street parking spaces can be provided: