In the Health Institution District, a lot shall have front, side and rear yards of not less than the depth or width indicated below for any land development which involves the construction of a permanent structure:
A. Front yard and side yard depth. Any building constructed in the Health Institution District shall be in conformity with a 60° lineal plane measured at the bottom of such plane at the applicable front and/or side property line. No portion of the building shall be permitted to break such lineal plane excepting such portions of the building which constitute gables, gabled dormers, rooftop ancillary services (such as heating and air conditioning equipment, staircases, fire escapes or walkways, elevator shafts, and similar appurtenances), signage, and/or facades. The requirement for side yard setbacks shall be decreased to the interior of the lots when lots have been combined into common ownership for a project which includes two or more lots.
B. Rear yard width: 25 feet.