Page 195 - Des Moines - Zoning, Planning and Design Ch 134, 135

DRAFT 135-3. lArGe-ScAle DeVelOPMeNt

Primary Street Designation

135-3.3 Primary Street Designation 135-3.4 Zoning Districts
The orientation and location of buildings on lots is Large-Scale Developments shall be rezoned to include
determined by the primary street designation. Some a mix of multiple districts upon the new street, block,
building type requirements are specific to the primary and lot layout. The mix of new districts is determined
street frontage. by the type of Large-Scale Development and the type of

3.3.1 PriMArY Street reQUireMeNt Large-Scale Development is set by the existing zoning
designation on the parcel prior to rezoning.
A minimum of 50 percent of a combination of the
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new streets in the development and existing streets 3.4.1 cOMPreHeNSiVe PlAN
fronting the development shall be designated and Zoning districts applied to any Large-Scale
treated as primary streets. A type 1 design exception Development shall be consistent with the city’s most
may be applied for up to a 20 percent reduction in the recent comprehensive plan.
minimum requirement for streets treated as primary.
3.4.2 DeterMiNAtiON OF tYPe
3.3.2 PriMArY Street cONSiDerAtiONS
A. Building Frontage. Primary streets shall be A. existing Zoning Designation. The type of Large-
Scale Development applied to the site is determined
designated so that building lots front at least one by the existing zoning designation on the parcel.
primary street, except for up to 20 percent of the Refer to Table 3.5-1 for the types.
lots may front a non-primary street.
B. Double-Frontage lots. At least 2 sides of double- B. Multiple Designations. Where multiple existing
zoning designations exist within the limits of the
frontage lots shall be designated as primary street. Large-Scale Development, one of the following shall
c. Driveways and Alleys/lanes. Driveways and be met:
alleys/lanes to lots shall not be located off a primary 1. For all sites up to 30 acres, one of the
street, except when the parcel is fronted by more development types allowed on the site may be
than two primary streets and/or there is no other utilized for the entire development.
alternative access.
D. Major and Minor Streets. When the development 2. Multiple development types allowed on the site
may be utilized for the development with a clear
abuts a major or minor street as defined in 135- delineation on the conceptual site plan where
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7.2.22, one of the following layouts shall be utilized each applies. All requirements shall be met for
to create slower, more accessible, and more each type.
walkable streets for fronting commercial or mixed-
use buildings than the major street would provide: c. exception. A Type 2 exception may be requested
1. Perpendicular. New primary streets shall be for a Large-Scale Development type with a different
mix of zoning designations not represented in 135-
located generally perpendicular to existing major 3.4.
streets.
2. Frontage Street. A new primary street shall be 3.4.3 GeNerAl reQUireMeNtS FOr NeW
provided essentially parallel to the major street ZONiNG DiStrictS
with a landscape buffer island separating the A. location of MX Districts.
streets of at least 10 feet.
1. DX, MX ,and CX districts shall be located within
500 feet of any major or minor streets and not
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abutting any N district.
2. DX, MX, and CX districts should be clustered
into areas of at least 10,000 square feet of net
lot area or located linearly along an existing
corridor.
6 Explanation of 50%: Two opposing block faces should be 3. DX, MX, and CX districts areas shall be
primary. On a square block, 50% would be primary. On a uninterrupted and continuous. Permitted office
typical rectilinear block more than 50% of the block will
likely be primary, since the longest face usually is primary,
providing front door access to the most buildings. 8 streets master plan will help designate these; defined in
7 Replace this language once the TMP is adopted. 135-8 definitions.

CITY OF DES MOINES CHAPTER 135: PLANNING AND DESIGN DRAFT 135-3-9