Hospitals engaging in any purpose authorized by the applicable state and/or federal agencies having jurisdiction. Such hospital may include outpatient clinics and nursing, educational and research facilities; nursery schools; nursing homes sponsored by or affiliated with such hospital; offices for medical staff including physicians, surgeons, dentists, psychiatrists, physiotherapists or other practitioners; administrative staff offices; laboratories; and accessory cafeterias, gift shops, flower shops and newsstands.

Accessory buildings and uses as set forth in this section shall be permitted, provided that the total floor area of any such building or use does not exceed that of the main hospital complex.

Parking structure, subject to the limitations set forth in this article.

Maintenance and storage buildings located within 150 feet of the property line.

[1]Heliport.

Senior citizen facilities, including the following. A single building may contain any combination of the senior citizen facilities listed below.

Accessory uses. Senior citizen facilities may contain or provide uses necessary to and customarily incidental to such facilities where such uses are limited to use by residents, their guests and employees, as follows:

The installation of equipment which uses perchloroethylene or increases the capacity of existing equipment which uses perchloroethylene.

No building or structure shall exceed six stories or a maximum height of 72 feet, exclusive of mechanical installations which shall not exceed 15 feet above said otherwise permitted height and which shall be completely screened in a manner in harmony with the exterior facade of the building or structure, except that the main hospital complex building may consist of up to but not more than 10 stories with a maximum height of 150 feet, containing no more than two towers. The Town Board may permit the number of towers on the main hospital complex building to exceed two as a conditional use.

The height of buildings located within a Hospital District shall be measured from the average elevation of the finished adjoining grade of such building. In no event shall the vertical distance between the highest roofline of a building and the lowest exposed height be more than 50% of the permitted building height.

In the case of a building containing senior citizen facilities, no building or part thereof shall exceed six stories with a maximum height of 72 feet.

All hospitals shall be located on sites consisting of not less than 40 acres.

The site shall have at least one property line running for a distance of at least 600 feet abutting a major thoroughfare of at least 80 feet of right-of-way in width. All vehicular ingress and egress shall be directly from such a major thoroughfare.

The tract of land on which a use under this article is conducted shall be operated, in its entirety, as a single or common management and maintenance unit with common open spaces, parking, utility, maintenance and services facilities and services, except in the case of senior citizen facilities in which Subsection D below shall apply.

Senior citizen facilities.

A 25% density bonus shall be available for senior independent-living facilities where such units are made available as affordable senior citizen facilities.

For buildings containing more than one senior citizen facility, a composite total of 32 units per acre shall be permitted, with each use assessed at the following rate:

Buildings containing the following senior citizen facilities shall have the following minimum and maximum gross habitable floor areas per unit:

In buildings containing more than one senior citizen facility, maximum permitted floor area shall be calculated based on the sum of the separate floor areas for each type of facility.

In senior independent-, congregate- and assisted-living facilities, a minimum of 40% of the dwelling units shall be one-bedroom units. No dwelling unit shall contain more than two bedrooms.

No basement apartments shall be permitted in any senior citizen facility other than one such apartment for the use of a superintendent, custodian or other person in charge of the maintenance of such dwelling.

The minimum distance of any main or accessory building or structure from the main thoroughfare shall be 100 feet. A front yard of not less than 35 feet in depth shall be maintained from the main thoroughfare and shall be kept free of off-street parking and roadways except for ingress and egress roadways from the main thoroughfare.

The minimum distance of any main or accessory building or structure from any side or real property line shall be 35 feet. Side and rear yards of not less than 35 feet shall be maintained and shall be kept free of off-street parking and roadways. The minimum distance of any main or accessory building or structure from any rear property line adjoining property in the unincorporated area of the Town of North Hempstead shall be 75 feet.

No building shall be directly accessible from a major highway, but shall be accessible from the access road at least 40 feet in width. An access road designated and used for vehicular traffic flowing in only a one-way direction, however, shall be at least 20 feet in width. Such access road shall include a sidewalk at least 10 feet in width between each building and the paved roadway. There shall be no parking, stopping or standing on any of the access roads. A strip of land at least 35 feet in width adjoining the right-of-way of the major highway shall be maintained as an area heavily landscaped with trees and shrubs.

The minimum one-hundred-foot setback for any building or structure from the major thoroughfare shall be increased one foot for each additional one foot of building height in excess of 72 feet.

The minimum thirty-five-foot setback for any building or structure from any side or rear property line shall be increased one foot for each additional one foot of building height in excess of 35 feet.

Any parking structure abutting a residence district, which is constructed underground along the adjacent property line of said residence district and is not visible therefrom, shall not be subject to the requirements set forth in this section.

A minimum of 80 square feet per dwelling unit of indoor common amenity space other than dining space shall be provided for senior citizen facilities.

A minimum of 50 square feet of common outdoor active and passive recreation and open space shall be provided per dwelling unit for senior citizen facilities.

The minimum distance between two buildings shall be at least 50 feet.

All buildings shall be erected and situated in such manner as to provide adequate light and air.

In the case of senior citizen facilities, the minimum distance between a senior facility and any other building shall be 50 feet or the height of the adjacent building, whichever is greater. The minimum distance between two senior citizen facilities shall be 30 feet.

All buildings used for senior citizen facilities shall be situated in such a manner as to provide adequate light and air.

All design features, as set forth in Article VIII, applicable to RM Districts.

All parking requirements shall be in accordance with § 70-103, except as herein provided:

Landbanked parking as defined in § 70-231 may be permitted for senior independent-, congregate- and assisted-living facilities subject to the following restrictions:

The entrance to any off-street parking or loading/unloading area shall be from an internal roadway and not from a public street.

Provision for off-street loading and unloading shall be made on the premises in a location that will not interfere with accessory parking or any means of ingress or egress thereto, and such areas shall be surfaced in the same manner as a parking area. Each space to be devoted to loading and unloading shall be at least 15 feet in width, 25 feet in length and 15 feet in clear height for each 10,000 square feet or part thereof of floor area, provided that not more than three such spaces shall be required for each building.

All areas devoted to nonemployee off-street parking shall be surfaced in accordance with the specifications of the Town of North Hempstead and shall be comprised of spaces having dimensions of not less than 10 feet in width by 20 feet in length when measured parallel and perpendicular to the curb for each motor vehicle, exclusive of aisles, driveways, passageways and other necessary space appurtenant thereto. In satisfying the off-street parking requirements for all permitted uses except senior housing facilities, up to but not more than 20% of the off-street parking spaces may have dimensions of not less than nine feet in width by 18 feet in length and shall be designated for exclusive use by compact automobiles.

All areas devoted solely to employee parking and so designated shall be surfaced in accordance with the specifications of the Town of North Hempstead and shall be comprised of spaces having dimensions of not less than nine feet in width by 18 feet in length when measured parallel and perpendicular to the curb for each motor vehicle, exclusive of aisles, driveways, passageways and other necessary space appurtenant thereto.

There shall be at least three off-street ambulance loading and unloading spaces on the premises in a location that will not interfere with accessory parking and means of ingress and egress thereto, and such areas shall be surfaced in the same manner as the parking areas. Each space shall be at least 15 feet in width, 25 feet in length and 15 feet in clear height.

Ambulance and loading/unloading areas shall be obscured from view from any adjacent residence district.

Parking areas shall be located at least 35 feet from all property lines and shall be suitably screened and permanently improved and maintained in a state of good repair.

Parking areas shall be illuminated at night. Where a parking area abuts a residence district, the lighting fixtures and equipment shall be so designed and installed as to reflect away from and to shield the residence district from the lights in the parking areas. The location, candlepower and type of fixture to be installed shall be first approved by the Building Official. All lighting shall be directed away from any adjoining residence district and shall not exceed a height of 50 feet above grade.

The provisions of the § 70-103N shall apply with regard to the width of access aisles and the length of parking spaces.

Maximum height and number of levels.

The exterior facade of the parking structure shall be constructed from material substantially similar to existing, surrounding construction or shall alternatively be composed of such material which shall be in harmony with but not necessarily the same as the facade of the existing surrounding construction.

A landscaped area of at least 25 feet shall be provided around the perimeter of any such structure. Said area shall be planted with perennial trees and shrubs to provide effective and substantial screening of the structure in accordance with the plan specification requirements applicable to site plan review. The second and third levels above grade of a parking structure shall be screened by a wall four feet in height.

All lighting within parking structures shall be constructed and positioned so as to ensure that such lighting or the headlights of vehicles inside the structure shall not be visible from any adjoining residence district.

Every parking structure shall include an access roadway leading to the structure at least 50 feet in length, which roadway shall be located so as to facilitate ingress to and egress from the structure without interfering with the flow of traffic on any adjacent roadway and to facilitate the circulation of traffic within the structure. Such access road shall provide separate means of ingress and egress with a traffic separator at the entrance to said road.

Each parking space in a nonemployee parking structure shall be not less than 10 feet in width by 20 feet in length when measured parallel and perpendicular to the side striping as hereinafter required, except that 20% of the parking spaces for all permitted uses except senior citizen facilities may have dimensions of not less than nine feet in width by 18 feet in length and shall be designated for exclusive use by compact automobiles.

Each parking space in a designated employee parking structure shall be not less than nine feet in width by 18 feet in length when measured parallel and perpendicular to the side striping as hereinafter required.

Each parking space required by this section shall be directly accessible from an access aisle without having to pass over any other parking space. An access aisle shall be an area of open space in the parking area exclusive of any area designated for parking spaces or designated for ingress and egress to the adjoining parking spaces.

The width of access aisles and the length of parking spaces shall be measured perpendicular to the direction of traffic flow in the access aisle. The length of the parking space, measured as described above, shall be known as the "stall to curb dimension." The access aisle shall be the pavement providing ingress to and egress from the parking space, as well as general circulation in the parking structure. These dimensions shall vary according to the angle formed by the parking space strip and the direction of traffic flow in the aisle in accordance with the following table:

Each parking space shall be outlined and bounded by a four-inch-wide painted stripe. The direction of permitted traffic flow in the access aisles shall be designated by directional arrows painted in the access aisle and located so that at least one such arrow appears in each 50 feet or fraction thereof of access aisle length. Each such arrow shall be at least three feet in length and painted with visible, reflective paint.

No person shall place in any area of the parking structure any object or substance that may create a hazard or obstruction to any person or vehicles traversing or using any portion of the parking structure.

No part of the parking structure or lot shall be used for the storage, servicing, dismantling or abandonment of any motor vehicles, article or material except that the parking and storage of ambulances may be permitted.

No signs of any type or description shall be permitted in, on or around the parking structure with the exception of the following:

The parking structure shall be of fireproof construction and shall include a dry standpipe system in such form as may be acceptable to the Nassau County Fire Marshal or other authority having jurisdiction.

The construction of a new building or addition to an existing building of greater than 2,000 square feet of gross floor area.

The construction of a new building or freestanding structure of addition to an existing freestanding structure greater than 20 feet in height.

The change in use of an existing building or buildings on a site in a manner which will increase the number of required off-street parking spaces for the site pursuant to § 70-96.11 by more than 5%.

A change in the number or location of access/egress points, curb cuts or entrance/exit drives.

Two or more projects within a twenty-four month period which cumulatively add more than 3,000 square feet of gross floor area or which cumulatively meet the criteria of § 70-96.14.3.

Any project in which it is determined by both the Commissioners of Buildings and Planning that the project will have potentially significant impacts which warrant Town Board review.

Any yard abutting a residence district shall be landscaped to a width of at least 35 feet adjacent to such property line.

Required landscaped areas shall include a five-foot berm to be planted with grass, ground cover, perennial trees and shrubs to provide effective and substantial screening of the Hospital District and buildings thereon from the adjoining residence district according to the plan specification requirements applicable to site plan review.