MapLink™ | General Requirements

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Accessory uses and accessory buildings See § 208-112: Accessory uses and accessory buildings. for more information.
Amateur radio antennas See § 208-115: Cellular towers and equipment. for more information.
Building height projections Spires, towers, elevator penthouses, mechanical equipment, tanks, satellite dishes, antennas and similar projections shall be included in calculating the height of a building, except that the foregoing projections may exceed the height limitations of the underlying zoning district by not more than 10 feet if such projections do not occupy more than 20% of the area of the uppermost floor or nonpeaked roof. Chimneys shall be excluded in calculating the height of a building.
Cellular towers and equipment See § 208-115: Cellular towers and equipment. for more information.
Conditional uses See § 208-117: Conditional uses. for more information.
Conversions of dwellings In Residence, Rural-Conservation, Planned Apartment and Office-Apartment Districts, a single-family detached dwelling, existing at the effective date of this chapter, may be converted into and used as a two-family or a multifamily dwelling for no more than four dwelling units when authorized as a special exception, provided that:
A. The plans for the conversion of said dwelling shall be submitted to the Zoning Hearing Board.
B. Such plans shall provide adequate and suitable parking or storage space, at a safe distance from the public highway, subject to the requirements of § 208-103.
C. Such dwelling shall be subject to the height, area, bulk, width and yard regulations effective in the district wherein the dwelling is situated, except that there shall be a lot area not less than the product of the minimum lot area prescribed in the district regulations and the number of families for the use of which such dwelling is to be converted.
D. There shall be no external alteration of the building except as may be necessary for reasons of safety, and fire escapes and outside stairways shall, where practicable, be located to the rear of the building.
E. The Zoning Hearing Board shall specify the maximum number of families permitted to occupy such dwelling and may prescribe such further conditions and restrictions with respect to the conversion and use of such dwelling and to the use of the lot as the Zoning Hearing Board may consider appropriate.
Density averaging provisions. See § 208-107: Density averaging provisions. for more information.
Extension or changes of uses authorized by special exception or conditional use
A. A use of a building or a lot authorized as a special exception or conditional use, either by decision of the Zoning Hearing Board or Board of Supervisors or by the enactment of or amendment to this chapter, may be extended within the building or upon the lot only when authorized as a special exception.
B. A use of a building or a lot authorized as a special exception or conditional use, either by decision of the Zoning Hearing Board or Board of Supervisors or by enactment of or amendment to this chapter, may be changed to a use permitted by right without further approval.
Fences, walls and security gates See § 208-119: Fences, walls and security gates. for more information.
Front yard projections and exceptions
A. Projections. No building and no part of a building shall be erected within or shall project into the required front yard except cornices, eaves, gutters or chimneys projecting not more than 18 inches; steps; bay windows not extending through more than one story and not projecting more than five feet; open balconies and terraces; patios and decks; or fences and walls not more than four feet in height.
B. Public transportation shelters. When approved by the Tredyffrin Township Planning Commission, shelters may be located within the required front yard and/or within a road right-of-way.
Heliports and helistops See § 208-116: Heliports and helistops. for more information.
Home-based businesses See § 208-120: Home-based businesses. for more information.
Minimum habitable floor area No one-story single-family dwelling erected on any lot shall have a floor area of less than 900 square feet, and no two-story single-family dwelling erected on any lot shall have a floor area of less than 1,200 square feet, exclusive of all porch areas (whether enclosed or not) and garage areas.
Minimum lot sizes and widths with respect to on-lot sewage disposal and water supply. In any area of the Township which is not served by sanitary sewers, the lot area requirements shall be not less than those prescribed below. Where the district requirements are more restrictive, the district requirements shall apply.
A. In all sections of the Township which are served neither with sanitary sewers nor with public water supply, lots shall have a minimum area of one acre and a minimum width at the building line of 150 feet.
B. In all sections of the Township which are served with public water supply, but not with sanitary sewers, lots shall have a minimum area of 18,000 square feet and a minimum width at the building line of 85 feet.
C. All apartment houses and multifamily dwellings shall be served by both public water supply and sanitary sewers.
Modification of common open space areas No modification, removal or release of any restrictions on an area or areas designated as areas for common open space use shall be permitted except upon a finding by the Board of Supervisors, following a public hearing thereon pursuant to public notice called and held in accordance with the provisions of this chapter, that the same is consistent with the efficient development and preservation of the entire tract, does not adversely affect either the enjoyment of land abutting upon or across the street from the tract or the public interest and is not granted solely to confer a special benefit upon any person. At any such hearing, any homeowners' association designated in the development plan which created the open space, any recognized civic or homeowners' association which operates within a reasonable distance from the affected site or any entity formed for the express purpose of acquiring and/or maintaining and/or preserving open space lands in the Township and surrounding environs and any property owners or residents adjoining the property at issue shall be deemed to have standing to participate as parties to the proceedings before the Board of Supervisors.
Nonconforming buildings or uses See § 208-99: Nonconforming buildings or uses. for more information.
Nonconforming lots A building may be erected or altered on any lot held as of December 30, 1963, in single and separate ownership which is not of the required minimum area or width, provided that the building or part thereof that is to be erected or altered complies with all other requirements of the zoning district in which it is located.
Off-street loading and unloading space Adequate off-street loading and unloading space with proper access from a street, highway, common service driveway or alley shall be provided on any lot on which a building other than a dwelling, apartment house, rooming house, boardinghouse or permitted accessory use is located. The off-street loading and unloading space shall be in addition to the required off-street parking space, and in no case shall the required space be less than one.
A. Each space shall consist of a twelve-foot by thirty-foot area for vehicles, such as passenger cars and panel or pickup trucks or a fourteen-foot by fifty-five-foot space for larger vehicles, such as buses and tractor-trailer type trucks. The height clearance in both cases shall be at least 15 feet.
B. All areas for the loading and unloading of delivery trucks and other vehicles and for the servicing of establishments or shops by refuse collection, fuel and other service vehicles shall have adequate and unobstructed access from a street, service driveway or alley and shall be so arranged that they may be used without blocking or otherwise interfering with the use of automobile accessways, parking facilities or pedestrianways.
C. For commercial establishments providing drive-through customer service, the following shall apply:
(1) Each door, window, canopy or other position or facility used for such service shall be provided with a separate waiting lane. Each such waiting lane shall be not less than 10 feet wide and 120 feet long.
(2) Each such waiting area shall be located entirely within the confines of the lot, shall be continuously separated from street or property lines by landscaped and curbed planter beds a minimum of 10 feet wide and shall not block or cross normal circulation patterns, entrances or exits.
Off-street parking and loading requirements See § 208-103: Off-street parking and loading requirements. for more information.
Prohibited uses See § 208-105: Prohibited uses. for more information.
Public transportation shelters See § 208-122: Public transportation shelters. for more information.
Rear yard projections No building and no part of a building shall be erected within or shall project into the required rear yard, except the following: cornices, eaves, gutters or chimneys projecting not more than 18 inches; bay windows and balconies not extending through more than one story and not projecting more than five feet; open steps, one-story decks and porches; patios and terraces; or fences and walls in accordance with § 208-119 hereof, except as otherwise provided in this chapter.
Reduction of lot area No lot area shall be reduced in such a way that the dimensions of any of the yard, open space and/or other dimensional requirements are not able to be met.
Side yard projections No building and no part of a building shall be erected within or shall project into the required side yard except cornices, eaves or gutters or chimneys projecting not more than 18 inches; steps, patios and terraces; or fences and walls in accordance with § 208-119 hereof, except as otherwise provided in this chapter.
Signs
A. The purpose of this article is to develop a comprehensive system of sign regulations to:
(1) Promote the safety of persons and property by providing that signs:
(a) Do not create traffic hazards by distracting or confusing motorists, or impairing motorists' ability to see pedestrians, other vehicles, obstacles or to read traffic signs.
(b) Do not create a hazard due to collapse, fire, collision, decay or abandonment.
(c) Promote the aesthetic quality, safety, health, and general welfare and the assurance of protection of adequate light and air within the Township by regulation of the posting, displaying, erection, use and maintenance of signs.
(2) Promote the efficient transfer of information through the use of signs and to permit such use, but not necessarily in the most profitable form or format available for such use.
(3) Protect the public welfare and enhance the overall appearance and economic value of the landscape, and to preserve the unique natural and historic environment that distinguishes the Township in accordance with Article I, § 27 of the Pennsylvania Constitution. The protection of the Township's historic resources, environment and aesthetics from the impacts of signage is a matter of critical importance to all residents and businesses in the Township.
B. It is further declared that these regulations are minimum standards provided to safeguard the life, health, property and public welfare by regulating and controlling the design quality, materials, construction, size, illumination, location and maintenance of all signs and sign structures while at the same time attempting to provide functional flexibility, encourage variety, and to create an incentive to relate signage to the basic principles of sound planning, development and use of residential, commercial and industrial properties.

For more detailed information on Signs, please reference Article XXV Signs. 
Special development regulations See § 208-102: Special development regulations. for more information.
Special development regulations designed to control noise pollution See § 208-102.1: Special development regulations designed to control noise pollution. for more information.
Steep slope regulations See § 208-118: Steep slope regulations. for more information.
Student housing See § 208-122.1: Student housing. for more information.
Yards in corner lots
A. Side yards. At least one side yard shall be provided, and the applicant may choose which non-front yard is to be considered the side yard.
B. Rear yards. At least one rear yard shall be provided and the applicant may choose which non-front yard is to be considered the rear yard.