The purpose of this district is to provide for medium-density residential development which is compatible with existing residential development and easily accessible to major highways and commercial areas; while also permitting medium- to high-density residential development, by providing the option of utilizing the provisions in Article XVIII, Open Space Design Option and Lot Averaging, to enable landowners within the R-3 District to elect to develop in a manner other than conventional lot by lot which will provide a greater variety in design and layout of dwellings and conservation of open space ancillary to such developments, all in concert with the Pennsbury Township Comprehensive Plan of 2006, as amended.
A building may be erected or used, and a lot or premises may be used, for only one of the following principal use and no other:
A. 
Uses by right.
(1) 
Single-family detached dwelling under conventional development.
(2) 
Woodlands, wildlife sanctuary, game preserves or other conservation purposes.
(3) 
Agricultural/farming uses, nonintensive, in conformance with § 162-2006, but with no livestock.
(4) 
Municipal uses including park and related accessory uses.
(5) 
Forestry/timber harvesting in conformance with Article XV.
B. 
Uses by special exception when authorized as a special exception by the Zoning Hearing Board, subject to the standards of Article XXIV of this chapter.
(1) 
Place of worship, including a rectory or parish house or other use accessory to the place of worship activity conducted on the lot in conformance with § 162-2019.
(2) 
Educational use in conformance with § 162-2019.
(3) 
Public utility facility.
C. 
Uses by conditional use when authorized as a conditional use by the Board of Supervisors, subject to the conditions of Article XXIII of this chapter.
(1) 
Single-family detached dwellings under lot averaging on a tract of less than 10 acres, net area, in conformance with § 162-1809.
(2) 
Single-family detached dwellings under the open space design option on a tract of 10 acres, net area, or greater, in conformance with Article XVIII.
(3) 
Single-family attached, two-family, multifamily, and accessory residential dwellings only through adaptive reuse of historic resources, as defined in this chapter where part of a development under the open space design option in Article XVIII in conformance with § 162-1808.
(4) 
Retirement community in conformance with § 162-2033.
D. 
Accessory uses. In addition to one principal use accessory uses listed below shall be permitted by right unless otherwise indicated as a special exception or conditional use in this chapter and shall be in conformance with § 162-2002 unless otherwise noted:
(1) 
Agricultural/farming accessory uses.
(2) 
Residential accessory uses, with the exception of § 162-2002C(9) and (15).
(3) 
Minor home occupations in conformance with the applicable standards of § 162-2024.
(4) 
Major home occupations by special exception in conformance with the criteria of Article XXIV and in conformance with the applicable standards of § 162-2024.
(5) 
Institutional accessory uses, including a cemetery in conjunction with a place of worship, by special exception in conformance with the criteria of Article XXIV and with § 162-2011.
(6) 
Accessory apartments by special exception in conformance with the criteria of Article XXIV and the applicable standards of § 162-2002.
(7) 
Accessory existing detached dwellings by conditional use in conformance with the criteria of Article XXIII and the applicable standards of § 162-2002.
Unless otherwise specified in this chapter (e.g., open space design option or lot averaging under Article XVIII), uses permitted in this district shall meet the following regulations:
A. 
Minimum lot area: one acre.
B. 
Minimum lot width at the building line: 150 feet.
C. 
Maximum lot coverage: 15%.
D. 
Minimum front yard: 50 feet, where the lot fronts on a local street, or 75 feet where the lot fronts on an arterial or collector road, or in the case of a flag lot or corner lot, the provisions of § 162-1902 shall apply.
E. 
Minimum side yard: 50 feet, aggregate of two side yards; 20 feet, minimum individual side yard.
F. 
Minimum rear yard: 40 feet, unless the lot is a reverse-frontage lot, in which event the requirements of § 162-1902 shall apply.
G. 
Maximum building height: three stories or 35 feet whichever is less, except those buildings or structures exempted in § 162-1902.
For additional standards applicable to permitted uses in this district, refer to:
A. 
Article XV, Natural Resources Protection, including the Groundwater Protection Overlay.
B. 
Article XVI, Flood Hazard Overlay District.
C. 
Article XIX, General Regulations, including lighting, screening and buffering, access, and parking.
D. 
Article XX, Supplemental Uses.
E. 
Article XXI, Signs.
F. 
Article XXII, Nonconforming Uses, Buildings and Structures, Lots, and Signs.
G. 
Article XVII, Historic Resources Overlay District.
H. 
Article XII-a, Route 1 Corridor and Brandywine Battlefield Overlay District.