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    1. Passport
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      1. Planning Magazine
      2. Planning December 2024
      Ron Durand was the first to build an accessory dwelling unit in the 9,500-person town of Newmarket, New Hampshire.

      Rural Communities Embrace ADUs to Boost Housing Supply

      How planners, lawmakers, and residents are changing attitudes and zoning rules about accessory dwelling units in small towns.
      by: Kevin Hardy
      How planners, lawmakers, and residents are changing attitudes and zoning rules about accessory dwelling units in small towns.
      1. Planning Magazine
      2. Planning September 2024
      The Adobu Dwell House model is a 540-square-foot, one-bedroom, one-bathroom, prefabricated home that is one of the preapproved plans that ca

      New ADU Tools May Unlock Affordable Housing in Your Backyard

      From California to Arkansas, ready-made design plans can reduce time and costs during the permitting process.
      by: Jon DePaolis       September 26, 2024
      From California to Arkansas, ready-made design plans can reduce time and costs during the permitting process.
      1. Planning Magazine
      2. Planning Summer 2021

      What's Blocking an ADU Boom?

      Accessory dwelling units are gaining national momentum, but these regulatory and financial hurdles still need to be cleared.
      by: Adina Solomon       September 09, 2021
      Accessory dwelling units are gaining national momentum, but these regulatory and financial hurdles still need to be cleared.
      1. Multimedia
      2. Blog
      Computer-Vision-Quantifies-San-Jose’s-Informal-ADUs

      The Connection Between Unpermitted ADUs in San José and the Need for Zoning Reform

      by: Grant Holub-Moorman
      Uncovering JAPA: Discover how policymakers are using computer vision to identify unpermitted ADUs in San José — shedding light on informal housing and the barriers to legal construction.
      1. Planning Magazine
      2. Planning Winter 2021

      3 Zoning Changes That Make Residential Neighborhoods More Affordable

      Zoning reform is one of our greatest weapons against rising housing costs. Here's how we can wield it.
      by: Robert Liberty
      After 100-plus years of prioritizing single-family zoning, cities and states are welcoming diverse housing types back to the neighborhood.
      1. APA Publications
      2. Zoning Practice

      Practice Gentle Density

      Zoning Practice — February 2023
      by: Jacqueline Berg, AICP, John Houseal, FAICP       February 01, 2023
      This issue of Zoning Practice explores zoning strategies that balance the concerns of residents and the demands of the housing market by accommodating gentle density increases in a context-sensitive manner. From historic downtown neighborhoods to modern residential subdivisions, the tools presented can be used by planners throughout the country to implement housing policy through regulation.
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      1. APA Publications
      2. Zoning Practice

      Beyond Use Zoning: The Role of Deregulation in Housing Equity

      Zoning Practice — May 2022
      by: John Zeanah, AICP       May 01, 2022
      This issue of Zoning Practice explores how accessory use standards, dimensional standards, and building codes affect opportunities to build missing middle housing. And it highlights how Memphis and other cities are looking beyond use zoning to advance goals of housing equity in reforming codes and policies.
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      1. In Your Community
      2. Housing Supply Accelerator

      Housing Supply Accelerator Playbook

      May 06, 2024
      The Housing Supply Accelerator Playbook is for local elected officials and community planners working to boost diverse, attainable, and equitable housing supply in communities nationwide.

    • Salt Lake City, UT, City Code

      Updated September 2021
      The city's code belongs to the Accessory Dwelling Units, Active Transportation, Affordable Housing Programs, Food Trucks, Group Housing, Home Occupations, Housing Supply Planning, Residential Infill Development, Rethinking Off-Street Parking Requirements, Solar Energy, Transit-Oriented Development, Urban Agriculture, and Urban Livestock collections.

    • Portland, OR, City Code

      Updated June 2022
      This regulation belongs to 18 Research KnowledgeBase collections.

    • Iowa City, IA, City Code

      Updated July 17, 2018
      This regulation belongs to the Accessory Dwelling Units, Design Review, Environmentally Sensitive Areas, Food Trucks, Housing Supply Planning, Inclusionary Housing, and Transfer of Development Rights collections.

    • Minneapolis, MN, Code of Ordinances

      Updated November 2021
      This regulation belongs to the Accessory Dwelling Units, Active Transportation, Affordable Housing Programs, Built Environment and Health, Food Trucks, Green Building, Group Housing, Housing Supply Planning, Residential Infill Development, Rethinking Off-Street Parking Requirements, Shared Mobility, Social Equity, Solar Energy, Urban Agriculture, and Urban Livestock collections.

    • Spokane, WA, Municipal Code

      Updated June 2021
      This regulations belongs to the Accessory Dwelling Units, Climate Change, and Tactical Urbanism collections.

    • Kirkland, WA, Pre-Approved DADUs

      2024
      The City of Kirkland, Washington, offers a pre-approved detached accessory dwelling unit program.

    • San Diego, CA, Companion Unit Handbook

      2019
      This guide informs homeowners on how to construct a companion unit on their property in San Diego, California.

    • Eugene, OR, Municipal Code

      Updated May 2019
      This regulation belongs to the Accessory Dwelling Units, Active Transportation, Housing Supply Planning, Residential Infill Development, Rethinking Off-Street Parking Requirements, and Solar Energy collections.

    • Santa Cruz, CA, Municipal Code

      Updated September 2019
      This collection belongs to the Accessory Dwelling Units, Green Building, Housing Supply Planning, and Inclusionary Housing collections.

    • Boulder, CO, Revised Code

      Updated April 2019
      This regulation belongs to the Accessory Dwelling Units, Active Transportation, Environmentally Sensitive Areas, Food Trucks, Housing Supply Planning, Inclusionary Housing, Marijuana-Related Uses, Rethinking Off-Street Parking Requirements, and Solar Energy collections.

    • Responding to Changing Households: Regulatory Challenges for Micro-Units and Accessory Dwelling Units

      NYU Furman Center Working Paper, January 2014
      by: Vicki Been, Benjamin Gross, John Infranca
      This report belongs to the Accessory Dwelling Units, Affordable Housing Programs, Housing Supply Planning, and Tiny Houses and Micro-Apartments collections.

    • Bloomington, MN, Code of Ordinances

      Updated December 2019
      This regulation belongs to the Accessory Dwelling Units, Active Transportation, Affordable Housing Programs, Creative Placemaking, Green Building, and Housing Supply Planning collections.

    • Promoting Workforce Housing: Expanding Locations and Development Potential

      2008
      These models belong to the Accessory Dwelling Units, Affordable Housing Programs, and Housing Supply Planning collections.

    • Madison, WI, Code of Ordinances

      Updated March 2023
      This regulation belongs to the Accessory Dwelling Units, Creative Placemaking, Electric Vehicle Infrastructure, Housing Supply Planning, Outdoor Lighting, Rethinking Off-Street Parking Requirements, Solar Energy, Urban Agriculture, and Zoning Reform and Code Writing collections.

    • Santa Clara County, CA, Code of Ordinances

      Updated August 2018
      These regulations belong to the Accessory Dwelling Units, Home Occupations, Scenic View Protection, Solar Energy, and Wildland-Urban Interface collections.

    • Sparks, NV, Code of Ordinances

      Updated July 2021
      These regulations belong to the Accessory Dwelling Units, Content-Neutral Sign Regulation, Housing Supply Planning, Solar Energy, Urban Agriculture, and Zoning Reform and Code Writing collections.

    • A Room of One’s Own: Accessory Dwelling Unit Reforms and Local Parochialism

      Urban Lawyer, 45(3): 519–569, 2013
      by: Margaret Brinig, Nicole Garnet
      This article discusses the national trend in state and local regulations toward more permissive regulations for accessory dwelling units (ADUs) and presents the findings of a study of local regulations in California.

    • Accessory Dwelling Units: A Smart Growth Tool for Providing Affordable Housing

      Housing News Network, August 2016
      by: Jaimie Ross
      This article provides a general overview of accessory dwelling units (ADUs), discusses potential regulatory barriers to ADUs and state efforts to promote ADUs in Florida, and includes considerations for local zoning ordinances.

    • Accessory Dwelling Units: Case Study

      2008
      by: Sage Computing, Inc.
      This short report documents how six different localities regulate accessory dwelling units (ADUs) and discusses the potential benefits of removing regulatory barriers to ADUs.

    • Accessory Housing Is Part of the Solution

      Breakthroughs, January 2004
      This short article summarizes a number of common regulatory barriers to affordable housing. These barriers include process requirements, design standards, occupancy standards, and lot size and parking standards.

    • Temple Terrace, FL, Imagine 2040 Comprehensive Plan

      Updated January 2023
      This city's comprehensive plan belongs to the Accessory Dwelling Units, Capital Improvements Programming, Comprehensive Planning, and Housing Supply Planning collections.

    • Prince George’s County, MD, Plan 2035 General Plan

      Adopted May 2014
      The county’s comprehensive plan, which achieved Bronze-level recognition in APA's Comprehensive Plan Standards for Sustaining Places Recognition Program Pilot, includes several policy recommendations that support the development of accessory dwelling units.

    • Secondary Suites: A Guide for Local Governments

      2005
      This guide provides local governments in British Columbia, Canada, with information to help them develop regulations for accessory dwelling units.

    • Municipal Planning Guidelines for Secondary Suites

      2010
      This guide provides local governments in Manitoba, Canada, with information to help them develop regulations for accessory dwelling units.

    • Accessory Dwelling Units: Model State Act and Local Ordinance

      January 2021
      by: Coralette Hannon, Gerri Madrid-Davis
      This guide includes model state and local legislation to encourage the development of accessory dwelling units.

    • Charlottesville, VA, Code of Ordinances

      Updated April 2018
      This regulation belongs to the Accessory Dwelling Units, Active Transportation, Housing Supply Planning, and Short-Term Residential Rentals collections.

    • Coconino County, AZ, Zoning Ordinance

      Updated December 2023
      This regulation belongs to the Accessory Dwelling Units, Housing Supply Planning, and Outdoor Lighting collections.

    • Clallam County, WA, County Code

      2017
      The county’s zoning code permits internal, attached, and detached accessory dwelling units by right in all districts that permit single-family residences, subject to use-specific standards.

    • Mesa, AZ, Code of Ordinances

      Updated May 2021
      These regulations belong to the Accessory Dwelling Units, Design Review, Group Housing, and Housing Supply Planning collections.

    • Palmer, AK, City Code

      2016
      The city’s zoning code permits internal, attached, and detached accessory dwelling units by right in all residential and agricultural districts, subject to use-specific standards.

    • Port Aransas, TX, Code of Ordinances

      2016
      The city’s zoning code permits internal, attached, and detached accessory dwelling units by right in all zoning districts that permit single-family residences, subject to use-specific standards

    • Lexington, MA, Town Bylaws

      2016
      The town’s zoning code permits internal and attached accessory apartments by right in multiple residential districts and larger internal and attached or detached accessory apartments by discretionary approval in multiple residential districts, subject to use-specific standards.

    • Orono, ME, Code of Ordinances

      2015
      The town’s land use code permits internal, attached, and detached accessory dwelling units by right in all districts that permit single-family dwellings, subject to use specific standards.

    • Moscow, ID, City Code

      2017
      The city’s land use code permits internal, attached, and detached accessory dwelling units by right in all residential districts, subject to use-specific standards.

    • Santa Fe, NM, City Code

      Updated October 2019
      This regulation belongs to the Accessory Dwelling Units, Green Building, Historic Preservation, Housing Supply Planning, Short-Term Residential Rentals, and Wildland-Urban Interface collections.

    • Summit County, CO, Land Use and Development Code

      2017
      These regulations belong to the Accessory Dwelling Units, Food Systems, Housing Supply Planning, Urban Livestock, and Wildland-Urban Interface collections.

    • Sandpoint, ID, City Code

      Updated December 2018
      This regulation belongs to the Accessory Dwelling Unit, Housing Supply Planning, and Short-Term Residential Rentals collections.

    • San Francisco, CA, ADU

      2015
      by: Openscope Studio Architects
      This local guide explains property owner options for developing accessory dwelling units in San Francisco.

    • Accessory Dwelling Units: A Guide to Accessory Apartments in Charlottesville, VA

      2015
      This local guide explains property owner options for developing accessory dwelling units in Charlottesville, Virginia.

    • Accessory Dwelling Unit Manual

      2003
      This local guide explains property owner options for developing accessory dwelling units in Santa Cruz, California.

    • Fayetteville, AR, Code of Ordinances

      Updated November 2019
      This regulation belongs to the Accessory Dwelling Units, Green Stormwater Infrastructure, and Rethinking Off-Street Parking Requirements collections.

    • Bloomington, IN, Municipal Code

      Updated October 2019
      This regulation belongs to the Accessory Dwelling Units, Green Building, and Housing Supply Planning collections.
    Showing 1 - 50 of 183 Next >