[Amended 7-24-2013 by L.L. No. 12-2013]
A. Maximum density unit calculation. The maximum number of density units (i.e., units per acre or "DU") in a minor or a major subdivision shall not exceed the maximum allowable DU, as calculated below, for the district in which the property is located prior to the application of any incentive densities pursuant to §
210-76 of Chapter
210. Any regulations contained in this chapter and in Chapter
210 restricting the number of dwelling units permitted in a conventional subdivision shall also restrict the number of dwelling units permitted in a cluster development. The maximum DU for a minor or a major cluster subdivision shall not exceed the maximum DU for a minor or a major conventional subdivision of the same lot.
B. The calculation of buildable yield ("BY") for a minor or a major subdivision shall be based on the following formula, which shall be applicable to all minor or major subdivisions as defined in this chapter and in Chapter
210. The buildable yield shall be used to determine the number of density units ("DU") that can be constructed on the site pursuant to the area, yard and bulk chart. The buildable yield shall be calculated in one of two ways:
(1) Yield sketch plan. This calculation requires the preparation
of a sketch plan in accordance with the standards of this chapter,
containing proposed lots, streets, rights-of-way, sewage disposal
system and water supply locations and setbacks, easements, and parkland
areas. If the parcel is not proposed for connection to central sewage
disposal facilities, the calculation shall also include an assessment
and certification by a professional engineer as to the suitability
of the soils to accommodate individual sewage disposal systems. The
sketch plan shall be based on a topographic and boundary survey of
the property showing the site conditions as of the time the Planning
Board conducts its review. The topographic information shall include
contours at not less than two-foot intervals as well as the location
of wetlands and wetland buffer areas based on a current field delineation;
streams, water bodies and associated buffer areas; significant trees
and tree clusters; and rock outcrops unless otherwise waived by the
Planning Board. The Planning Board, in its sole discretion, shall
determine whether the yield sketch plan is realistic and reflects
a development pattern and DU calculation that may reasonably be implemented.
(2) Formula calculation. This calculation requires that
the BY is determined by subtracting the constrained land areas of
the property (i.e., Town, NYSDEC and USACOE regulated wetlands, and
lands within the one-hundred-year floodplain area, and steep slope
areas of greater than 25%) for which the applicant has not secured
and has not submitted to the Planning Board permits or approvals that
would allow development in such constrained land areas, and the areas
required for public improvements (i.e., roads, sidewalks, stormwater
management facilities, etc.), as follows:
(a)
Formula:
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Where
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T =
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Total acreage inside the boundary lines of the
project parcel.
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W =
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Total acreage inside the boundary lines of the
project parcel and within a Town, a NYSDEC, or a USACOE regulated
wetland (exclusive of any buffer area).
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F =
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Total acreage inside the boundary lines of the
project parcel and within the one-hundred-year floodplain area where
the base elevations and flood hazard are determined exclusive of any
flood area within a regulated Town, state or federal wetland.
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S =
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Total acreage inside the boundary lines of the
project parcel and containing slopes of 25% or greater.
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I =
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Total acreage of required public improvements
(i.e., roads, sidewalks, stormwater management facilities).
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BY =
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Maximum number of acres that can be developed
and that form the basis for determining the maximum number of residential
dwellings that may be created per the area, yard and bulk chart.
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(b)
The BY calculation set forth above shall be
adjusted to include, in whole or in part, the constrained land area(s)
for which the applicant has secured the necessary permits or approvals
from applicable local, state or federal agencies authorizing development
in such area(s) and has submitted copies of said permits or approval
to the Planning Board. If the parcel is not proposed for connections
to central sewage disposal facilities, the plan shall also include
an assessment and certification by a professional engineer as to the
suitability of the soils to accommodate individual sewage disposal
systems. The Planning Board, in its sole discretion, shall determine
whether the plan is realistic and reflects a development pattern that
could reasonably be implemented.