B.
The subdivision or lot line change of any lot, block, parcel or site into separate ownership lots for any purpose or compatible use permitted pursuant to this Article XVI of this chapter shall be permitted upon compliance by the applicant with the Village subdivision review procedures as administered by the Village Planning Board, except that a subdivision plat showing land ownership and use shall be approved and endorsed by the Village Planning Board pursuant to §§ 7-728, 7-730, 7-732, 7-738 and 7-740 of the Village Law of the State of New York pertaining to subdivision control and the State Department of Health as may be required and shall be filed in the office of the Westchester County Clerk prior to the issuance of building permits.
C.
In addition to the requirements stated above, every applicant seeking subdivision approval must provide a conventional plan and a clustering plan for consideration by the Planning Board.
(1)
The conventional plan must conform to all environmental set-asides, minimum lot size requirements and all other zoning requirements, including the maximum number of allowable lots.
(2)
The clustering plan must meet the following parameters:
(a)
The number of lots may not exceed the maximum number of lots in the conventional plan.
(b)
A minimum of 33% of buildable land, which shall exclude land area defined by the Village of Tarrytown as wetlands, steep slopes of 25% or greater and hilltops, as set forth in § 305-67 of the Zoning Ordinance, shall be set aside as open space.
(c)
The minimum lot size in the clustering plan may be reduced to no less than 50% of the otherwise minimum lot size permitted in the applicable zoning district.
(d)
The Planning Board may modify all lot and bulk regulations, including lot width, frontage, setbacks, yards, floor area ratios and building height, if it makes findings that three of the criteria for such modifications, hereinafter set forth, have been met. Building heights in the ordinance shall not exceed a maximum average finished grade of 2 1/2 stories or 25 feet as defined in the Zoning Ordinance and as permitted throughout the Village.
(e)
Criteria for permitting modifications to lot and bulk regulations:
[1]
The amount of open space provided is in excess of the minimum standard of 33%, including both buildable and nonbuildable lots;
[2]
The location of proposed open space enhanced by its relation to neighborhood preservation issues as identified by the Planning Board;
[3]
Environmentally valuable, sensitive lands and other resources are protected;
[4]
The open space is enhanced;
[5]
Linkages to other open space areas are provided;
[6]
Viewsheds are protected;
[7]
Recreational assets are provided;
[8]
Environmental features, including specimen trees, steep slopes, wetlands, hilltops and other features, are protected;
[9]
Historic and/or cultural resources are protected.
(f)
When reviewing clustering plans within the context of the above criteria, the Planning Board shall carefully balance each request for flexibility in lot and bulk controls with the overall impact that the plan has on the surrounding area and its environmental features, including the dimensional parameters and adjacent properties.
D.
The future ownership of the resulting open space preserved in an approved clustering plan shall be completely at the applicant's discretion. The applicant may donate the land to the Village; however, in the event that an offer of donation is not accepted by the Board of Trustees, or if the applicant chooses to retain his/her ownership rights, the applicant shall grant a conservation easement to a not-for-profit organization, approved by the Village Board of Trustees, which shall provide that the created open space will never be developed. If neither the Village nor any not-for-profit organization wants to hold the conservation easement, then the applicant shall grant the conservation easement to a homeowners' association.
E.
An approved clustering subdivision plat must include a map note indicating that it was approved as a cluster and the same must be identified with reference to the approving resolution for the subdivision; furthermore, for future reference, the approved building coverage for each parcel of the cluster subdivision must be designated on the subdivision plat.