Morrisville Unified Development Ordinance - September 2020
High Density Residential (HDR) District
3.3.5.
High Density Residential (HDR) District
A. Purpose
In accordance with the Comprehensive Plan, the High Density Residential District accommodates neighborhoods with a variety of housing types and a net density greater than 7.5 dwelling units per acre. It is suitable for infill development in established neighborhoods, for development of areas identified as high density residential in the Comprehensive Plan, or areas suited to high density development supported by adequate infrastructure and nonresidential land uses. The regulations of this district are intended to allow innovation in the arrangement of buildings within such developments and discourage the development of land uses that could substantially interfere with, or be detrimental, to residential character.
B. Principal Intensity and Dimensional Standards
Cross References
A, etc. are symbols used in the illustrations showing application of dimensional standards
Art. 4: Use Standards Art. 5: Development Standards
Single- Family
Single- Family
Multi- family Dwellings
Duplex Dwellings
Other Uses
Sec. 5.9.6 Sec. 5.9.7
Detached Dwellings
Attached Dwellings
Lot Standards
Art. 6: Riparian Buffers
Min. Net Lot Area (sf)
3,500
5,000
n/a
20,000
20,000
Art. 7: Stormwater Management
A
Min. Lot Width (ft)
35
50
24
100
100 n/a
Max. Net Density (du/ac) Max. Lot Coverage (%)
17.0
17.0
17.0
17.0
65
65
70
65
65
Setbacks
B1 B2
Alley-loaded
10 [1]
10 [1]
10 [1]
n/a
n/a
Min. Front (ft)
Other
20
20
20
20
30
C
Min. Side (ft)
0
0
0
30
30
D
Min. Corner Side (ft)
8
8
18
30
30
E 1 E 2
Alley-loaded
6 [1]
6 [1]
6 [1]
n/a
n/a
Min. Rear (ft)
Other
15
15
10
30
30
Building Standards F 1 Max. Structure Height (ft)
45
45
45
75
75
no minimum
no minimum
no minimum
no minimum
F 2 Min. Structure Height (stories)
3 [2][3]
Min. Building Separation (ft) n/a Notes: sf = square feet; ft = feet; du = dwelling unit; ac = acre; % = percent; n/a = not applicable [1] Setbacks also apply to residential developments with detached front-loaded garages located to the rear of the principal structure. [2] Applied to multifamily developments. See additional standards in Section 5.9.8.C.1, Minimum Height. [3] The minimum structure height for a carriage–style building with multifamily dwellings over garages is two stories. (Ord. No. 2014-022, 06/24/2014; Ord. No. 2016-001, 05/10/2016) 6 6 24 n/a
G
Morrisville, NC
September 1, 2020
Unified Development Ordinance
Page 3-13
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