Any landowner in Zone R-1 or R-2 may desire to develop his site under the regulations set forth below rather than in §
450-17. The developer shall then be governed by the provisions of this article.
All performance standard subdivisions shall meet the standards
set forth in the Table of Performance Standards. The development must
meet all of these standards, depending on the design, mix of units,
shape, size and natural properties of the site. Any one of the performance
standards in this or other sections of this chapter may limit how
many units can be placed on a given site.
Table of Performance Standards
|
---|
District
|
Density
|
Open Space Ratio
|
Impervious Surface Ratio
|
Minimum Total Site Area
(acres)
|
---|
R-1
|
4.9
5.9
|
0.40
0.35
|
0.32
0.35
|
3
5
|
R-2
|
8.0
14.0
|
0.30
0.25
|
0.42
0.44
|
3
5
|
Permitted uses shall be as follows:
A. Single-family detached.
(1) A single-family residence on an individual lot with private yards
on all four sides of the house.
(2) Dimensional requirements:
(a)
Lot area minimum: 8,000 square feet.
(b)
Lot area average: 10,000 square feet.
(c)
Maximum building coverage: 30%.
(e)
Minimum yards: front, 35 feet; side, 10 feet; and rear, 40 feet.
(f)
Minimum lot width at setback: 70 feet.
(g)
Parking: two off-street spaces per dwelling unit.
B. Single-family detached, lot line.
(1) For a single-family residence on an individual lot, the building
is set on one of the side property lines. An easement for maintenance
on the adjoining lot is one of the requirements for this type of construction.
Windows on the lot line side of a dwelling are prohibited.
(2) Dimensional requirements:
(a)
Lot area average: 8,000 square feet.
(b)
Lot area minimum: 6,500 square feet.
(c)
Maximum building coverage: 30%.
(d)
Maximum floor area ratio: 60%.
(e)
Minimum yards: front, 20 feet; and rear, 40 feet.
(f)
Minimum lot width at setback lines: 65 feet.
(g)
Building spacing: 30 feet.
(h)
Parking: two off-street parking spaces.
C. Duplex.
(1) A duplex is a single-family semidetached dwelling unit having only
one dwelling unit from ground to roof and only one wall in common
with another dwelling unit.
(2) The dimensional requirements shall be as follows:
(a)
Table of Dimensional Requirements.
|
Type
|
Minimum Lot Area per Dwelling Unit
(square feet)
|
Average Lot Area
(square feet)
|
Off-Street Parking Spaces
|
Minimum Lot Width at Building Setback
(feet)
|
---|
|
1-bedroom
|
3,200
|
3,600
|
1.75
|
36
|
|
2-bedroom
|
3,600
|
4,000
|
2.00
|
40
|
|
3-bedroom
|
4,000
|
4,500
|
2.00
|
40
|
|
4-bedroom
|
4,200
|
4,700
|
2.25
|
45
|
|
5-bedroom
|
4,500
|
5,000
|
2.50
|
45
|
(b)
General.
[1]
Maximum impervious surface (on lot): 0.30.
[3]
Building setback line: 30 feet.
[4]
Minimum side yard: 10 feet.
D. Patio house.
(1) The patio house is a single-family detached or semidetached unit,
with one dwelling unit from ground to roof, having individual outside
access. The lot shall be fully enclosed by a wall of four feet to
six feet in height. All living spaces, i.e., living rooms, den and
bedrooms, shall open into a major open area or patio.
(2) The dimensional requirements shall be as follows:
(a)
Table of Dimensional Requirements.
|
Type
|
Minimum Lot Area per Dwelling Unit
(square feet)
|
Average Lot Area
(square feet)
|
Off-Street Parking Spaces
|
Minimum Lot Width at Building Setback
(feet)
|
---|
|
1-bedroom
|
2,800
|
3,000
|
1.75
|
40
|
|
2-bedroom
|
3,400
|
3,600
|
2.00
|
40
|
|
3-bedroom
|
3,800
|
4,000
|
2.00
|
40
|
|
4-bedroom
|
4,000
|
4,200
|
2.25
|
45
|
|
5-bedroom
|
4,200
|
4,500
|
2.50
|
45
|
(b)
General.
[1]
Maximum impervious surface ratio (on lot): 0.35.
[2]
Minimum patio area: 0.65.
[3]
Maximum floor area ratio: 0.60.
[5]
Minimum patio dimension: 20 feet.
E. Multiplex.
(1) The multiplex is an attached dwelling. It may be single-family attached
or multifamily. In general, all units have independent outside access,
but this is not necessary. Units may be arranged in a variety of configurations:
side by side, back to back or vertically. The essential feature is
the small number of units attached. No more than five units shall
be attached in any group, and groups shall average four units per
structure.
(2) The dimensional requirements shall be as follows:
(a)
Table of Dimensional Requirements.
|
Type
|
Minimum Lot Area per Dwelling Unit
(square feet)
|
Average Lot Area per Dwelling Unit
(square feet)
|
Off-Street Parking Spaces
|
---|
|
Efficiency
|
800
|
1,000
|
1.25
|
|
1-bedroom
|
1,500
|
1,700
|
1.75
|
|
2-bedroom
|
2,200
|
2,400
|
2.00
|
|
3-bedroom
|
2,500
|
2,800
|
2.00
|
|
4-bedroom
|
2,700
|
3,000
|
2.25
|
(b)
General.
[1]
Maximum impervious ratio (on lot): 0.30.
[2]
Minimum building setback line:
[3]
Minimum building spacing: 24 feet.
[4]
Minimum lot area (for building): 8,000 square feet.
[5]
Minimum lot width (for building) at setback line: 80 feet.
[6]
Maximum height: three stories.
F. Atrium house.
(1) The atrium house is a single-family, attached, one-story dwelling
unit with individual outside access. The lot shall be fully enclosed
by a wall at least seven feet high. A private yard, herein called
an atrium, shall be included on each lot. All living spaces, i.e.,
living rooms, den and bedrooms, shall open into the atrium.
(2) The dimensional requirements shall be as follows:
(a)
Table of Dimensional Requirements.
|
Type
|
Minimum Lot Area
(square feet)
|
Average Lot Area
(square feet)
|
Off-Street Parking Spaces
|
Minimum Lot Width
(feet)
|
---|
|
1-bedroom
|
1,200
|
1,375
|
1.75
|
35
|
|
2-bedroom
|
1,700
|
1,850
|
2.00
|
35
|
|
3-bedroom
|
1,950
|
2,100
|
2.00
|
40
|
|
4-bedroom
|
2,150
|
2,300
|
2.25
|
40
|
|
5-bedroom
|
2,300
|
2,500
|
2.50
|
40
|
(b)
General.
[1]
Maximum impervious surface ratio (on lot): 0.65.
[2]
Minimum atrium area: 0.35.
[3]
Maximum floor area ratio: 0.65.
[5]
Minimum atrium dimension: 16 feet.
[6]
Minimum atrium area: 288 square feet.
[7]
Minimum secondary atrium area: 48 square feet.
G. Townhouse (note: only in R-2 Zone).
(1) The townhouse is a single-family attached domicile with one dwelling
unit from ground to roof having individual outside access. Rows of
attached townhouses shall average eight dwelling units.
(2) The dimensional requirements shall be as follows:
(a)
Table of Dimensional Requirements.
|
Type
|
Minimum Lot Area
(square feet)
|
Average Lot Area
(square feet)
|
Off-Street Parking Spaces
|
Minimum Lot Width
(feet)
|
---|
|
1-bedroom
|
1,500
|
1,600
|
1.75
|
18
|
|
2-bedroom
|
1,700
|
1,800
|
2.00
|
20
|
|
3-bedroom
|
1,900
|
2,000
|
2.00
|
22
|
|
4-bedroom
|
2,000
|
2,200
|
2.25
|
24
|
|
5-bedroom
|
2,200
|
2,400
|
2.50
|
26
|
(b)
General.
[1]
Maximum impervious surface ratio (on lot): 0.40.
[2]
Maximum floor area ratio: 0.75.
[3]
Minimum building setback:
[c] Pedestrian walk: 15 feet.
[4]
Minimum building spacing: 30 feet.
The developer shall determine what environmental or natural
features are present on the site and shall meet the following standards
of environmental protection. Site alterations, including regrading
the existing topography, filling lakes, ponds, marshes or floodplains,
clearing vegetation or altering watercourses prior to the submission
of plans for development shall be a violation of this chapter. Where
alterations occur, restoration of the site to its original condition
shall be required.
A. Floodplains. All such lands shall remain as permanent open space,
except that roads may cross the floodplain where design approval is
obtained.
B. Alluvial soils. All such lands shall remain as permanent open space,
except that roads may cross the floodplain where design approval is
obtained. Where floodplains are defined, they shall be used rather
than alluvial soils.
[Amended 6-17-1986 by Ord. No. 86-5]
C. Steep slopes. In areas of steep slopes, i.e., those above 8%, the
following standards shall apply:
(1) Eight percent to 15%. No more than 40% of such areas shall be developed
and/or regraded or stripped of vegetation.
(2) Fifteen percent to 25%. No more than 30% of such areas shall be developed
and/or regraded or stripped of vegetation.
(3) Twenty-five percent or more. No more than 15% of such areas shall
be developed and/or regraded or stripped of vegetation.
D. Forest. No more than 40% of such forests may be cleared or developed.
The remaining 60% shall be maintained as permanent open space.
[Amended 7-5-2017 by Ord.
No. 2017-5]
E. Lakes, ponds, wetlands or watercourses. These areas shall be left
as permanent open space. No development, filling, piping or diverting
shall be permitted except for required roads.
F. Pond shorelines. The shorelines of ponds (bodies of water less than
two acres in area) shall, to a depth of 150 feet from the shorelines,
contain no more than 10% impervious surfaces. At least 80% shall be
permanent open space. This provision applies to wetlands of less than
two acres.
G. Stormwater. All developments shall limit stormwater runoff so that
no more runoff is generated than that of the site in its natural condition.
Where farm field or disturbed earth is the existing condition, meadow
shall be used as the starting base of such calculations instead of
the actual condition. All runoff calculations shall be based on a
one-hundred-year, twenty-four-hour storm. The method for such calculations
shall be that contained in United States Department of Agriculture,
Soil Conservation Engineering Field Manual, Notice 4 of April 30,
1971, as amended.
H. Soil erosion and sedimentation. All developments shall protect streams,
lakes and ponds from sedimentation and shall control erosion. In addition,
all developments shall submit an erosion control plan as part of the
preliminary land development plan.
[Amended 6-17-1986 by Ord. No. 86-5]
A buffer yard shall be required. The buffer yard shall be part
of the open space and not part of the yard assigned to the dwelling
units. In the various districts, the following standards shall apply:
District
|
Width of Buffer Yard
(feet)
|
Maximum Percentage of Open Space in Buffer Yard
|
---|
R-1
|
20
|
30%
|
R-2
|
20
|
40%
|
In situations where duplex, patio, atrium, townhouse or multiplex
units are used and where garages or driveways are used as the off-street
parking, an additional 0.25 space per dwelling unit of overflow off-street
parking shall be required.