A building may be erected, altered or used and a lot or premises may be used for any of the following purposes and for no other:
A. 
Business or professional offices or studios, provided that no goods are publicly displayed for sale on the premises.
B. 
Apartment houses; provided, however, that the off-street parking requirements shall be as specified in § 405-1703A(1) and (6). Notwithstanding anything to the contrary, every apartment house shall have a lot area of at least twice the ground area of the building, exclusive of the building itself, any accessory building, the parking spaces required by this chapter and the driveways required to serve the parking area. The following yard requirements shall be observed:
(1) 
Front yard: 25 feet.
(2) 
Rear yard: 25 feet.
(3) 
Side yard: 20 feet.
C. 
Forestry.[1]
[1]
Editor's Note: Added at time of adoption of Code (see Ch. 1, General Provisions, Art. I).
A lot area of not less than 1,500 square feet per apartment unit shall be provided for any apartment house located within this district. For all other permitted uses within this district, a lot area of not less than 7,500 square feet shall be provided for every building or use. For all above permitted uses, in no case shall more than 75% of the lot area be occupied by buildings, parking area, driveways and other impervious coverage.
Each lot shall have a width of at least 40 feet at the street line (frontage).
A. 
Front yard. For each building or use on a lot, there shall be a front yard of at least 15 feet.
B. 
Side yard. For each building or use on a lot, there shall be two side yards, neither of which shall be less than six feet; provided, however, that, as to the portion of the side yard between the rear wall of the main building and the rear property line, no more than two feet of said side yard may be used for parking.
C. 
Rear yard. For each building or use on a lot, there shall be a rear yard of at least 50 feet. Parking shall be permitted in the rear yard beginning three feet from the rear of the building. The three-foot buffer strip shall be suitably landscaped in a manner acceptable to the Zoning Officer.
No driveway from any street shall enter directly therefrom into the front yard area or a side yard area or over any sidewalk; provided, however, that the Zoning Hearing Board may grant a special exception to permit such driveway. In determining whether such exception should be granted in any particular case, the Board shall consider, in addition to the tests and standards provided in § 405-2205, the location of the property in relation to density of traffic, the degree of pedestrian travel on the sidewalk in question, the particular need for such driveway in the particular case and such other considerations as may be deemed relevant to the public safety, health and welfare by the Board.
No building or structure shall exceed 40 feet in height.
There shall be permitted, with the obtaining of a permit from the Borough of Lansdale, a maximum size sign of 16 square feet, neither dimension to exceed five feet either vertically or horizontally, to be of a freestanding and/or directory-type nature. The sign shall be set back at least four feet from the inside of the sidewalk line and shall be set back not less than six feet from any side property line.