Determination of the maximum number of dwelling
units for a conservation subdivision in Option 1 shall be based upon
a yield plan, described in Subsection A below. The maximum number
of dwelling units in Options 2 and 3 shall be based on the gross tract
area and calculated as set forth in Subsections B and C below.
A. Density in Option 1. The maximum number of dwelling
units in Option 1 shall be based on a yield plan, which shall meet
the following requirements:
(1)
Yield plans shall be prepared as conceptual layout plans in accordance with the standards of Chapter
130, Subdivision and Land Development, containing proposed lots, streets, rights-of-way, and other pertinent features. Yield plans shall be drawn to scale, but need not be based on a field survey. The layout shall be demonstrably compliant with all applicable zoning regulations and entirely feasible from an engineering standpoint, reflecting a development pattern that could reasonably be expected to be implemented, taking into account the presence of wetlands, floodplains, steep slopes, existing easements or encumbrances and, if not served by central sewage disposal facilities, the ability of the site to utilize on-lot, soils-based sewage disposal methods.
(2)
The yield plan shall identify the site's primary
and secondary conservation areas, as identified in the existing resources/site
analysis plan.
(3)
Sewage disposal systems. On sites not served
by central sewage disposal facilities, density shall be further determined
by evaluating the number of homes that could be supported by individual
soils-based sewage disposal methods. For the purposes of determining
density under this section, this standard shall exclude holding tanks,
individual stream discharge systems and evapotranspiration systems.
Based on the existing resources/site analysis plan and observations
made during an on-site visit of the property, the Planning Commission
or Board of Supervisors shall select a ten-percent sample of the lots
considered to be marginal for on-lot sewage disposal. The applicant
shall provide evidence that these lots meet the standards for an individual
soils-based septic system. Should any of the lots in a sample fail
to meet the standard for an individual soils-based septic system,
those lots shall be deducted from the yield plan and a second ten-percent
sample shall be selected by the municipal planning commission and
tested for compliance. This process shall be repeated until all lots
in a given sample meet the standard for an individual soils-based
septic system. The applicant shall be granted the full density determined
by the yield plan.
(4)
Yield plan dimensional standards.
(a)
The following dimensional standards shall be used in the development of a yield plan. Lots shall comply with all requirements of Chapter
130, Subdivision and Land Development. Lot areas shall be calculated as provided in the definition of "lot area calculation" in Article
III.
[1] Minimum lot area: 80,000 square
feet
[2] Minimum lot width: 250 feet.
(b)
Lots which front on secondary collector or primary
streets shall have a minimum lot width measured at both the building
and street lines of at least 250 feet. Flag lots shall not be permitted
along collector or primary streets.
(c)
Front yard:
[1] On rural, residential, cul-de-sac
and secondary feeder streets: 75 feet.
[2] On secondary collector and primary
streets, and scenic roads: 100 feet.
B. Density in Option 2. The maximum number of dwelling
units in Option 2 shall equal one dwelling unit per 160,000 square
feet of gross tract area.
C. Density in Option 3. The maximum base density in Option
3 shall equal one principal dwelling unit per 10 acres of gross tract
area. In addition, up to two accessory dwelling units are permitted
on a lot, incidental to the primary permitted use and not conducted
as an independent principal use, provided the following regulations
are met:
(1)
The accessory dwelling unit shall be located
within the principal dwelling unit or in existing or new outbuildings
(such as barns, stables, carriage houses, garages, and spring houses)
and shall be designed to harmonize with the appearance of the principal
dwelling.
(2)
On lots less than 10 acres but at least five
acres in area, a maximum of one accessory dwelling unit is permitted.
On lots 10 acres or larger, up to two accessory dwelling units are
permitted.
(3)
The gross floor area of one accessory dwelling unit shall not exceed 1,200 square feet. The gross floor area of the other accessory dwelling unit, where permitted, shall not exceed 950 square feet. Under this section, existing historic accessory buildings more than 75 years old exceeding these floor area limits may be permitted to be used as an accessory dwelling unit, and shall not be required to meet the setback requirements set forth in §
150-110.6.
(4)
No part of an accessory dwelling unit shall
be located more than 500 linear feet from any point on the principal
dwelling, except for an existing historic accessory building.
(5)
Accessory dwellings shall not be permitted to
have an additional accessory building, such as a garage.
(6)
Building permits for new accessory dwelling
units (and use and occupancy permits for existing structures proposed
for use as accessory dwelling units) shall not be issued until the
applicant demonstrates that a restrictive covenant has been placed
on the subject property prohibiting future enlargement of the accessory
dwelling unit beyond that permitted herein. This restriction shall
also be incorporated into the building permit. Issuance of permits
for accessory dwelling units shall be contingent upon approval of
the Montgomery County Health Department for appropriate sewage disposal
systems.
D. In Options 2 and 3, dwelling unit calculations resulting
in a fraction of 0.5 or greater shall be rounded up to the next higher
whole number and a fraction of less than 0.5 shall be rounded down
to next lower whole number.
E. In Options 2 and 3, lots shall be permanently restricted
from future subdivision and land development by a deed restriction
enforced by the Township or by a conservation easement held by the
Township or a qualified conservation organization. The organization
and the terms and form of the easement shall be approved by the Township.
F. Transfer of development rights. All or some of the units permitted under Subsections
A,
B and
C above on one or more tracts may be transferred to one or more other tracts, by conditional use, provided the following conditions are met:
(1)
All tracts (whether "sending" or "receiving")
shall be owned by the same legal or equitable owner.
(2)
All tracts shall be located in the AGR Agricultural
District or the LPD Land Preservation District.
(3)
The applicant shall demonstrate that providing fewer or no units on one or more tracts and more units on one or more other tracts advances the purposes of conservation subdivision set forth in §
150-110.1 better than locating the maximum permitted number of units on each tract.
(4)
The Board of Supervisors shall determine that
one or more of the tracts is less suitable or not suitable for development
(the sending tracts) and the other tracts are suitable for higher
density development (the receiving tract), in accordance with the
goals of the Worcester Township Comprehensive Plan and Open Space
Plan.
(5)
Permission to transfer units from one or more tracts to other tracts shall be otherwise subject to the requirements of Chapter
150, Zoning, and Chapter
130, Subdivision and Land Development, and any other Worcester Township regulations which apply to the development of the tract(s).
(6)
The applicant shall enter into an agreement
with the Township specifying:
(a)
The maximum number of units permitted on each
of the tracts;
(b)
The minimum required open space on each tract, which shall meet the requirements of §
150-110.11C; and
(c)
Other conditions as applicable.
(7)
Prior to final approval of the plans for the sending or receiving tract, a deed of dedication to Worcester Township or a conservation easement running with the land and in favor of the Township or a conservation organization approved by the Township shall be established prohibiting any development of the sending tract, except as agreed in Subsection
F(6) above and specifically permitted by Worcester Township, and shall be recorded in the Montgomery County Office of Recorder of Deeds. The terms and form of the deed of dedication or conservation easement shall be acceptable to Worcester Township.
Minimum open space required in Option 1 shall
be determined as follows:
A. Determine constrained lands. Constrained lands shall consist of the sum of Subsection
A(1) and
(2) below:
(1)
One hundred percent of floodplains, wetlands,
land continuously covered with water, riparian buffer Zone 1, land
within the legal rights-of-way of existing public streets or highways,
or within the rights-of-way for existing or proposed overhead utility
lines, and steep slopes over 25%.
(2)
Fifty percent of steep slopes 15% to 25%.
B. Determine adjusted tract area (ATA). The adjusted tract area (ATA) shall equal the gross tract area, as defined in Article
III, minus the constrained lands determined in Subsection
A above.
C. Calculate minimum open space. The minimum required open space shall equal 50% of the adjusted tract area calculated in Subsection
B above, plus 100% of the constrained lands calculated in Subsection
A above.
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Formula: Open Space = (50% of ATA) + Constrained
Lands
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D. Conservancy lots, containing an existing or proposed
dwelling or farm complex, may be established to provide surrounding
residents with visual access to open space land, while keeping the
land under private ownership and maintenance. A conservancy lot shall
conform to the following standards:
(1)
It shall be at least 10 acres in area.
(2)
It may occupy up to 60% of the minimum required open space, with the remainder of the required open space owned and managed in accordance with the methods permitted in §
150-110.12. This percentage may be increased to 100% if, at the discretion of the Board of Supervisors, such increase furthers the open space objectives of the Township.
(3)
A minimum area of at least one acre surrounding the dwelling or farm complex shall be set aside and shall not be counted toward the required minimum open space. The remainder of the conservancy lot shall be permanently protected open space subject to the provisions of §
150-110.12, Ownership and maintenance of open space and common facilities.
(4)
The conservancy lot shall be held under individual private ownership (not a homeowners' association or land trust) and shall conform to the lot width and yard requirements for Option 3 in §
150-110.6.
Lots shall conform with the following lot area,
width and yard requirements:
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Option 1 Neighborhood Lots
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Option 2 Estate Lots
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Option 3 Country Properties
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Minimum lot area
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18,000 square feet with centralized sewer and
water
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30,000 square feet
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40,000 square feet
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60,000 square feet
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Minimum lot width:
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At street line
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40 feet
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50 feet
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100 feet
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150 feet
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At building line
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80 feet
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100 feet
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200 feet
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300 feet
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Front yard
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35 feet
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50 feet
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50 feet
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100 feet
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Side yard
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10 feet, 25 feet aggregate
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15 feet, 40 feet aggregate
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50 feet
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100 feet
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Rear yard
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40 feet
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50 feet
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50 feet
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100 feet
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[Amended 10-20-2021 by Ord. No. 287]
Maximum impervious surface limitations shall
be established as follows:
Lot Area
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Maximum Impervious Surface Coverage
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18,000 to 39,999 sq. ft.
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25%
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40,000 to 49,999 sq. ft.
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24%
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50,000 to 59,999 sq. ft.
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23%
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60,000 to 69,000 sq. ft.
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22%
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70,000 to 79,999 sq. ft.
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20%
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80,000 sq. ft. — 2.99 acres
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18%
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3.00 to 3.99 acres
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16%
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4.00 to 4.99 acres
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14%
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5.00 to 5.99 acres
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12%
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6.00 to 6.99 acres
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10%
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7.00 to 7.99 acres
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8%
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8.00 to 8.99 acres
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7%
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9.00 to 13.99 acres
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6%
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14.00 or more acres
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Not to exceed 39,500 sq. ft.
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The following uses shall be permitted within
the open space in Option 1 developments:
A. Conservation of open land in its natural state (e.g.,
woodland, fallow field, or managed meadow);
B. Nonintensive agricultural and horticultural uses,
including boarding of horses, raising crops or livestock, wholesale
nurseries excluding a retail sales center, tree farm excluding Christmas
tree retail sales. New buildings and structures are not permitted,
with the exception of fences and shelters for animals not exceeding
300 square feet in floor area. Related existing agricultural residences
and other existing associated buildings and structures may be located
on the same lot as the agricultural uses, but the footprint of the
residential building shall not be counted towards the minimum required
open space. Agricultural uses specifically excluded are intensive
agricultural uses and commercial livestock operations involving swine,
poultry, mink, and other animals likely to produce highly offensive
odors.
C. Pasture land for horses used solely for recreational
purposes. Equestrian facilities, such as corrals, paddocks and riding
rings, but excluding new buildings, shall be permitted, but shall
not occupy more than half of the minimum required open space.
D. Neighborhood open space uses such as common greens,
picnic areas, community gardens, trails, and similar low-impact passive
recreational uses, but specifically excluding motorized off-road vehicle
uses, shooting ranges, and other uses similar in character and potential
impact as determined by the Board of Supervisors.
E. Active noncommercial recreation areas, such as playing
fields, playgrounds, courts, and bikeways, provided:
(1)
Such areas in total do not consume more than
50% of the minimum required open space or five acres, whichever is
less.
(2)
Playing fields, playgrounds, and courts shall
not be located within 150 feet of abutting residential properties.
F. Water supply and (if specifically permitted by the
Board of Supervisors upon demonstration of no reasonable engineering
alternative) in-ground sewage disposal systems (including individual
off-lot systems), designed, landscaped, protected and permanently
memorialized in recorded easement/maintenance agreements approved
by the Township Solicitor.
G. Naturalized stormwater recharge areas designed, landscaped,
and available as an integral part of the open space system and capable
of being used or enjoyed (e.g., a scenic feature, open meadow) by
the residents of the development or Township, as determined by the
Board of Supervisors.
H. Easements for drainage, access, sewer or water lines,
or other public uses.
I. Underground utility rights-of-way. (Aboveground utility
and road rights-of-way may traverse open space and conservation areas,
but shall not count towards the minimum required open space.)
The location and configuration of proposed open space shall be based upon the guidelines and review standards outlined in §§
130-15.1 and
130-15.2 of Chapter
130, Subdivision and Land Development. In addition, the open space shall meet the following design standards:
A. Open space shall be laid out in general accordance
with the intent to provide an interconnected network of open space
across the development site, and ultimately across the Township. All
primary conservation areas shall be included in the open space.
B. The required open space shall be owned and maintained as permitted in §
150-110.12.
C. At least 30% of the adjusted tract area shall be available
for the common use and passive enjoyment of the residents of the development,
or Township residents if applicable, except where the primary purpose
of the open space is for agricultural purposes.
D. Buffers for adjacent public parkland.
(1)
Where the proposed development adjoins public
parkland, a natural buffer of at least 150 feet in depth shall be
provided within the development along its common boundary with the
parkland, within which no new structures shall be constructed, nor
shall any clearing of trees or understory growth be permitted, except
as may be necessary for street or trail construction, or stewardship
of the buffer area.
(2)
Where the required buffer is unwooded, the Board
of Supervisors may require vegetative screening to be planted, or
that it be managed to encourage natural forest succession through
"no mow" policies and the periodic removal of invasive plant species.
(3)
Proposed maintenance of the parkland buffer shall be included in the open space management plan required in §
150-110.12C.
E. No portion of any building lot may be used to meet the minimum open space requirement, except in the form of conservancy lots as permitted in §
150-110.5D.
F. Pedestrian and maintenance access to open space, excluding
those lands used for agricultural or horticultural purposes, shall
be provided in accordance with the following requirements:
(1)
One access point per 15 units shall be provided.
Such access points shall be a minimum of 35 feet in width.
(2)
Access to open space used for agriculture may
be appropriately restricted for public safety and to prevent interference
with agricultural activities.