Unified Development Code (UDC)

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Chapter 55: The Unified Development Code

The Unified Development Code was adopted on July 16, 2018.  It replaces portions of Chapter 47 and all of Chapters 55, 56, 57, 59, 60, 61, 62, 63, and 104 as well as the Land Development Regulations. These combined chapters are refered to as the Unified Development Code or UDC.

​​Chapter 55 Unified Development Code UDC 4th Edition Snip.PNG

Effective Date November 17, 2019 

(Includes Amendments through Ordinance No. 19-34)


When the UDC is amended, it is changed or added to. Listed below are the approved a​mendments to date.

ORD-20-​18 (PDF)

An amendment to reorganize code requirements for area plans, site plans for administrative approval, site plans for special exception use, site plans for planning commission approval, and site plans for city council approval to a single new code section. Approved: July 6, 2020


​OR​D-19-34 (PD​F)

An amendment to the premium options to further promote affordable dwelling units in downtown developments by combining the residential use premium and the affordable housing premium into a single, affordable residential units premium option.  Approved October 7, 2019

ORD-19-32 (PDF)

An amendment to provide land use regulations for the recreational marijuana uses created by the Michigan Regulation and Taxation of Marihuana Act.  Approved: October 17, 2019

ORD-19-28 (PDF)

An amendment to the dimensional standards table. Approved September 3, 2019

ORD-19-27 (PDF)

An amendment to add accessory restaurants to the O district.  Approved September 3, 2019

​ORD-19-26 (PDF) 

Amendments to the Permitted Use Table, Parkland Donations, Dimensional Standards Table, and a Front Lot Line definition. Approved August 19, 2019

ORD-19-1​7 (PDF)

An amendment to create a front porch setback exception.  Approved: July 1, 2019​

ORD-19-16 (PDF)​​

An amendment to define, provi​de requirements for, and specify zoning districts in which Mobile Food Vending services may operate on private property in the City of Ann Arbor. Approved: ​ June 3, 2019

​​ORD-19-15 (PDF)

 An amendment to create Temporary Outdoor Activity, Short Term Car Storage, and Medium Term Car Storage as new uses, provide use specific standards for each, and allow the uses in the P (Parking) district.  Approved: June 3, 2019​​


​ORD-18-​22 (PDF)

Marijuana-Infused Product Processors as a Special Exception Use in the C2B and C3 Zoning Districts. Section 5.37.2 defines a Marijuana-Infused Product Processor as: A licensee that is a commercial entity located in this state that purchases resin, oil, or other concentrates, to produce, package, and wholesale marihuana-infused products to licensed Provisioning Centers or other Processors.​ Approved: August 23, 2018

ORD-18-20 (PDF)

An amendment to list Special Exception Uses as Type I Citizen Participation Projects Approved: August 23, 2018

​ORD-18-01 ​(PDF)

An a​mendment to add specific requirements for ground based Solar Energy Systems and related equipment. ​ Approved: February 20, 2018

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​Planning & Development Services
301 E. Huron St.
Ann Arbor
Planning Manager

Brett Lenart, AICP 
734.794.6000 x42606