Where a property line divides a structure along a common wall, as in a townhouse or two-family dwelling, a side yard is not required as to the property line dividing the structure.

Two-family dwelling units or townhomes situate in residential zones may be subdivided along party walls provided there is no alteration of any existing side, front or rear yards and such subdivision can be submitted as a simple subdivision under Chapter 104, Subdivision and Land Development, of the Code of the Township of Unity.

The minimum lot area per single-family dwelling (in square feet) shall follow the yard, space, area and bulk requirements set forth in Appendix A[1] in the C, A, R-1, R-2 and R-3 Districts.

Single-family dwellings in the B-1, B-2, B-3, I or I-AP Zoning Districts, shall follow and comply with the yard, space, area and bulk requirements for single-family dwellings set forth in Appendix A[2] for the zoning district in which the single-family dwelling is located.

No accessory structure shall exceed a height of 15 feet. The height regulations of this chapter shall not apply to television and radio towers. Except within the Airport Overlay District, an applicant may request a special exception from the Zoning Hearing Board to construct church spires, belfries, monuments, tanks, water or fire towers, ornamental towers, spires, chimneys, elevator bulkheads and smokestacks in excess of the maximum height requirements of a district. The Zoning Hearing Board shall only grant such special exception if it finds the proposed construction will not adversely impact or devalue surrounding properties, or otherwise be detrimental to the public health, safety and well-being.

In determining the height of a structure in stories, a basement shall be counted as a story when more than 60% of its aggregate wall surface, measured between the floor and top of the wall, is or will be above grade as shown on construction plans.

Fire escapes, uncovered stairs and landings, canopies, eaves, or other architectural features not required for structural support may project into the required side, front or rear yard not more than a total of three feet.

Accessory structures may project into yards as set forth herein.

Patios may be located in the required yard area not closer than the following to any property line:

Notwithstanding any of the above provisions, handicapped access ramps shall be permitted to project into required yards to an extent necessary to make such handicapped access ramps safe and accessible, in compliance with the standards established by the Pennsylvania Uniform Construction Code.

Projections which are incidental or accessory to preexisting nonconforming structures as set forth hereafter.

Where the existing encroachment is into the required front yard, the building or structure may be expanded, enlarged, restored or reconstructed vertically and laterally even though part of the expansion, enlargement, restoration or reconstruction is located in the required front yard, so long as the expanded, enlarged, restored and/or reconstructed existing structure does not encroach further into the required front yard than the existing legally encroaching structure. Provided, however, that no such expansion, enlargement or reconstruction shall take place within 15 feet of the paved surface of any roadway.

Where the existing encroachment is into the required side yard, the building or structure may be expanded, enlarged, restored or reconstructed vertically and laterally even though part of the expansion, enlargement, restoration or reconstruction is located in the required side yard, so long as the expanded, enlarged, restored and/or reconstructed existing structure does not encroach further into the required side yard than the existing legally encroaching structure.

Where the existing encroachment is into the required rear yard, the building or structure may be expanded, enlarged, restored or reconstructed vertically and laterally even though part of the expansion, enlargement, restoration or reconstruction is located in the rear yard, so long as the expanded, enlarged, restored and/or reconstructed existing structure does not encroach further into the required rear yard than the existing legally encroaching structure.

Where the existing encroachment is in excess of the height limitations, the building or structure may be expanded, enlarged, restored or reconstructed horizontally at the same height as the existing structure, so long as the expanded, enlarged, restored and/or reconstructed structure does not exceed the height of the existing encroaching structure.

Where the existing encroachment is a combination of the required yard and height requirements, the building or structure may be expanded, enlarged, restored or reconstructed to the extent permitted by Subsections D(1) through (4) herein.

For purposes of determining the extent of any permitted encroachment, the point of encroachment of an "existing legally encroaching structure" shall be the point at which any expanded, enlarged, restored or reconstructed building attaches to the existing legally encroaching structure. It is the intent of this section to permit enlargement, expansion, restoration and reconstruction of a nonconforming building along the common line of the area of the existing building to which it is attached.

An encroachment into any required rear, front or side yard, or an encroachment in excess of any height limitation, created by or through the grant of a variance, special exception, or conditional use, may be restored or reconstructed to the extent of such grant, but not expanded or enlarged beyond same without the approval of the Zoning Hearing Board or Board of Supervisors, as the case may be.