ADUs and Duplexes

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ADU and Duplex FAQs

ADU Ordinance Adopted(PDF, 287KB)! 

Two-Family Dwellings (Duplexes) Ordinance Adopted!(PDF, 223KB)

 

ADUs & Duplexes

In an effort to expand housing opportunities and diversify housing choices, the Ames City Council directed staff to explore policies around allowing accessory dwelling units (ADUs) and duplexes (two-family dwellings) within single-family neighborhoods.

Accessory Dwelling Unit small house

ADUs are accessory living areas smaller than and detached from the primary single-family home but with a bedroom, kitchen, and bathroom. Duplexes are attached two-family dwellings, sometimes called twin homes, that are two independent living spaces and are not linked with a single-family home. In the past, City Code limited options for duplexes and second units in single-family neighborhoods. Private covenants within subdivisions may also limit these uses.

There is a national interest in having more housing choices as costs increase. The City is exploring more housing choices within existing neighborhoods that complement the surroundings. This was a goal outlined in Ames Plan 2040 that improves choice, sustainability, and vitality.

The adopted standards for ADUs include a size limit of 900 square feet, one bedroom, one parking space, and that the property owner reside in either the primary home or the ADU, which allows for one unit on the property to be rented if desired. Duplexes are proposed with design standards to address design compatibility related to the existing neighborhood. 

ADUs - Adopted Regulations(PDF, 287KB)

2023 Open House Schedule

Opportunities to learn more about new housing options, potential policy changes, and ask questions were held:
  • Monday. Aug. 21, 2023; 5:30-7:30 pm; Ames Public Library – Brown Auditorium, 515 Douglas Avenue
  • Thursday, Sept. 14, 2023; 5:30-7:30 pm; Hira Park – Shelter, 3622 Woodland Street
  • Monday, Sept. 18, 2023; 5:30-7:30 pm; James Herman Banning Ames Municipal Airport – Lobby & Multi-purpose Room, 2520 Airport Drive
  • Monday, Sept. 25, 2023; 5:30-7:30 pm; Inis Grove – Walnut Shelter, 2500 Duff Avenue
    • Alternative Rain Location: Homewood Golf Course Clubhouse, Community Room, 401 E. 20th Street

ADU Brochure(PDF, 1MB)

ADU Survey -

The online survey is now closed.

Duplexes Survey -

The online survey is now closed.

Prior Meetings & Workshops, Timeline

 

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