In expansion of the declaration of legislative intent and community development objectives contained in Article
I of this chapter, the specific intent of this district is:
A. To provide for the Township's fair share of population
growth, by permitting high-density development and a variety of detached,
semidetached, and attached dwelling types.
B. To provide standards that permit orderly and efficient
high-density development while preserving and protecting adjacent
areas from any negative impacts.
C. To promote the sense of neighborhood and promote community
identity.
D. To encourage walking between buildings, and encourage
automobile trips that serve more than one purpose, thereby reducing
traffic volume.
E. To provide open space and recreation facilities for
the benefit of residents of high-density developments.
F. To further the general welfare by extending greater
opportunities for better and more affordable housing to present and
prospective residents of Lower Frederick Township.
G. To promote the objectives and policies of the Township
Comprehensive Plan.
[Amended 11-8-2000 by Ord. No. 00-04]
In the R-4 High-Density Residential District,
a building may be erected, altered or used, and a lot may be used
or occupied, for any of the following uses and no other:
A. Any mix of the following residential dwelling types, according to the densities permitted in §
170-61A below:
(1) Single-family detached dwelling.
(5) Single-family semidetached dwelling.
(6) Two-family detached dwelling.
(7) The following dwelling types are permitted on tracts
with a minimum of two acres, excluding rights-of-way of existing roads:
(a)
Two-family semidetached dwelling.
B. Open space uses, primarily passive in nature, including
wildlife sanctuary, forest preserve, nature center, and similar uses.
C. Game farm, fish hatchery, hunting or fishing preserve;
or similar uses designed for the protection or propagation of wildlife.
D. Parks and recreation areas in compliance with the standards and criteria of Article
XIII, Institutional and Recreational Overlay District, when approved by the Board of Supervisors.
E. Home occupation, by special exception and in compliance with §
170-25 of this chapter.
F. Accessory uses. Accessory uses shall be permitted on the same lot with and customarily incidental to any permitted use, in compliance with §
170-24, Accessory uses, of this chapter.
G. Government uses, public utility facility.
H. Residential conversion to not more than two dwelling
units of any single-family detached dwelling that existed as of the
date of adoption of this chapter, provided that the dimensional and
development regulations for a two-family detached dwelling and all
other zoning requirements are met.
[Amended 10-3-2023 by Ord. No. 2023-03]
A. Density shall be calculated in compliance with the standards listed below. Maximum tract density shall be subject to further modification by the environmental adjustment factors in §
170-41 of this chapter.
(1) Single-family detached dwellings: three dwelling units per acre.
(2) Lot line and village house dwellings: four dwelling units per acre.
(3) Patio house dwellings: five dwelling units per acre.
(4) Single-family semidetached and two-family detached dwellings: six
dwelling units per acre.
(5) Two-family semidetached, atrium house, and townhouse dwellings: six
dwelling units per acre.
B. Minimum buildable area for each building lot shall be equal to the
minimum lot size specified in Table 170-61C below or 21,780 square
feet, whichever is smaller.
C. The minimum lot area, minimum lot width, maximum building coverage,
maximum impervious surface coverage, and minimum front, side and rear
yard setbacks required for each permitted use in the R-4 High-Density
Residential District are as prescribed in Table 170-61.C herein.
Table 170-61C
Dimensional Regulations: R-4 High-Density Residential District
|
---|
Dwelling/Use Type
|
Minimum Lot Area
(square feet)
|
Minimum Lot Width
(feet)
|
Maximum Building Coverage
(%)
|
Maximum Impervious Surface Coverage
(% of lot area)
|
Minimum Front Yard
(feet)
|
Minimum Side Yard
(feet)
|
Minimum Rear Yard
(feet)
|
---|
Single-family detached
|
10,000
|
80
|
14
|
20
|
25
|
15/
|
30
|
Lot line house
|
7,000
|
60
|
30
|
40
|
25
|
30 (one only)
|
30
|
Village house
|
6,200
|
55
|
20
|
30
|
15
|
10
|
30
|
Patio house
|
4,500
|
45
|
30
|
45
|
25
|
10
|
0
|
Single-family semidetached
|
5,000 per du
|
40 per du
|
25
|
40
|
25
|
12 (one only)
|
30
|
Two-family detached
|
5,000 per du
|
40 per du
|
20
|
35
|
25
|
15
|
30
|
Two-family semidetached
|
3,000 per du
|
30 per du
|
20
|
40
|
25
|
20 (one only)
|
30
|
Atrium house
|
2,500 per du
|
40 per du
|
50
|
65
|
20
|
10 (end only)
|
0
|
Townhouse
|
2,500 per du
|
20 per du
|
50
|
65
|
20
|
15 (end only)
|
25
|
All other uses (except parks and recreation areas)
|
43,560 (1 acre)
|
150
|
20
|
50
|
30
|
20
|
30
|
D. Access to a public street. As an exception to the requirements of §
170-11 of this chapter, each and every lot in the R-4 District shall abut a public street at the ultimate right-of-way line for at least 50 feet or the minimum lot width requirement for the specific dwelling/use type, whichever is smaller, and said frontage must be usable for purposes of ingress and egress to the lot, subject further to the design requirements of §
170-63 of this chapter.
E. Additional setback regulations.
(1) A lot with multiple street frontages shall have a front yard setback
along each frontage.
(2) If a standard building line has been established by previous development
on adjoining streets, and it is less than the minimum front yard setback
required for that dwelling type as set forth above, the minimum front
yard setback for a new development shall be the average front yard
setback of existing principal buildings within 500 feet to either
side of the proposed development.
(3) Lot line house. Only one side yard is required for lot line houses.
Unless a side yard having a minimum setback of five feet is provided
for the second side yard, a five-foot-wide maintenance easement shall
be provided along the side lot line. Minimum distance between a lot
line house and another dwelling shall be 30 feet.
(4) Two side yard setbacks are required for single-family and two-family
detached dwellings, and one side yard setback is required for single-family
and two-family semidetached dwellings.
(5) Minimum distance between buildings containing atrium or townhouse
dwellings shall be 40 feet.
F. Zoning district boundary setback. A minimum setback of 50 feet is required between any semidetached or attached principal building in the R-4 High-Density Residential District and any Township boundary or any boundary of a residential zoning district with a maximum permitted density of two units per acre or lower. This setback may be part of a required yard area and shall include landscaping and/or berming according to the provisions of Chapter
145, Subdivision and Land Development.
G. Unless specifically regulated elsewhere in this chapter, the maximum height for all accessory buildings and structures is 15 feet and is 35 feet for all other buildings and structures. (See §
170-24 and §
170-32 for additional height regulations).
H. Parking area setback. A minimum thirty-foot setback shall be required
between any parking area of eight or more spaces and any side or rear
lot line or tract boundary. This parking area setback may be part
of a zoning district boundary or buffer yard. If the parking area
extends over or is shared/used by two or more lots, the setback shall
not be required from the common lot line(s) of these lots.
I. Maximum length of attached dwellings. No more than four atrium houses
or eight townhouses are permitted within one building. The length
of any single building or connected buildings containing residential
dwellings shall not exceed 160 feet.
J. Subdivision and land development. All applicants seeking subdivision and/or land development approval shall comply with and follow the requirements of §
170-41, Environmental adjustment factors, to determine the development capacity of the site.
K. Only one principal use shall be allowed on a lot.