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Florida Accessory Dwelling Units Statute
§163.31771, 2011by: State of FloridaFlorida state law authorizes all localities with a shortage of affordable rental housing to adopt an ordinance that permits accessory dwelling units (ADUs) in all areas zoned for single-family residential use. -
Hawaii Revised Statutes
Updated December 2021by:These statutes belong to the Accessory Dwelling Units and Planning and Zoning Enabling Laws collections. -
Moscow, ID, Comprehensive Plan
Adopted December 2009The city’s comprehensive plan discusses the benefits and challenges associated with expanding the supply of accessory dwelling units (ADUs) and includes a policy recommendation that supports the development of ADUs. -
Accessory Dwelling Units: Issues & Opportunities
1995by: Byron KatsuyamaThis guide provides a comprehensive overview of local policy issues related to accessory dwelling units (ADUs) and includes specific recommendations for cities and counties in Washington to help them develop zoning regulations for ADUs. -
Accessory Dwelling Units: A Practical Option to Promote Affordability
2010This concise guide provides an overview of local policy issues related to accessory dwelling units (ADUs) and includes specific recommendations for cities and counties in Delaware to help them develop zoning regulations for ADUs. -
Auburn, WA, Imagine Auburn Comprehensive Plan
Adopted December 2015The city’s comprehensive plan includes several policy recommendations that support the development of accessory dwelling units. -
Orono, ME, Comprehensive Plan
Adopted November 2015The town’s comprehensive plan includes two specific policy recommendations that support the development of accessory dwelling units. -
Model Regulations: Housing Diversity and Affordability—Accessory Dwelling Units
Sustainable Land Use Code Project, 2013This model ordinance provides a template to help towns in metropolitan Hartford, Connecticut, draft regulations that encourage the development of accessory dwelling units. -
Auburn, AL, Zoning Ordinance
Updated October 2022The city’s zoning code permits internal, attached, and detached accessory dwelling units (ADUs) by right in multiple residential districts, subject to use-specific standards. -
Accessory Dwelling Unit Model Ordinance
2011This model ordinance provides a template to help cities in Southwest Idaho draft regulations that encourage the development of accessory dwelling units. -
Auburn, WA, Municipal Code
2017The city’s zoning code permits internal, attached, and detached accessory dwelling units by right in all districts that permit single-family homes, subject to use-specific standards. -
Rockingham County, NH, Accessory Dwelling Unit Model Ordinance
2016This model ordinance provides a template to help cities and towns in Rockingham County, New Hampshire, draft regulations that encourage the development of accessory dwelling units. -
Fort Lauderdale, FL, Code of Ordinances
Updated January 2023This regulation belongs to the Accessory Dwelling Units, Rethinking Off-Street Parking Requirements, Tactical Urbanism, and Urban Agriculture collections. -
Greensboro, NC, Land Development Ordinance
2017The city’s land development code belongs to the Accessory Dwelling Units, Housing Supply Planning, and Scenic View Protection collections. -
Johnson County, KS, Zoning Regulations
2016The county’s zoning code permits internal, attached, and detached accessory dwelling units by right in rural and residential districts, subject to use-specific standards. -
Bozeman, MT, Code of Ordinances
Updated December 2019This regulation belongs to the Accessory Dwelling Units, Green Stormwater Infrastructure, Group Housing, Historic Preservation, Housing Supply Planning, Marijuana-Related Uses, and Urban Livestock collections. -
Durango, CO, Code of Ordinances
Updated April 2019These regulations belong to the Accessory Dwelling Units, Marijuana-Related Uses, and Scenic View Protection collections. -
Accessory Dwelling Unit Homeowners’ Handbook: A Guide for Homeowners on Oahu Interested in Building an Accessory Dwelling Unit
2016This local guide explains property owner options for developing accessory dwelling units in Oahu County, Hawaii. -
Accessory Dwelling Units Program Guide
Bureau of Development Services, 2016This local guide explains the application and review process for developing accessory dwelling units in Portland, Oregon. -
Gainesville, FL, Code of Ordinances
Updated May 2022This regulation belongs to the Accessory Dwelling Units, Biophilic Planning, Green Building, Housing Supply Planning, Outdoor Lighting, Shared Mobility, and Wildland-Urban Interface collections. -
Columbia, MO, Code of Ordinances
2017The city code addresses accessory dwelling units, food systems, housing supply planning, scenic view protection, residential infill development, and urban livestock. -
Rapid City, SD, Code of Ordinances
Updated December 2019These regulations belong to the Accessory Dwelling Units, Housing Supply Planning, Small Wireless Facilities and Wireless Facilities in the ROW, and Wind Energy collections. -
Oregon Guidance on Implementing the Accessory Dwelling Units Requirement Under Under SB1051
September 2019This model ordinance provides a template for cities and counties in Oregon to help them update their zoning regulations for accessory dwelling units (ADUs). -
ADU Update: Early Lessons and Impacts of California's State and Local Policy Changes
December 2017by: David GarciaThis briefing paper summarizes the early effects of state statute amendments in California related to accessory dwelling units (ADUs). -
Accessory Dwelling Unit Memorandum
December 2016This guide is designed to help cities and counties in California update local zoning regulations for accessory dwelling units (ADUs) to comply with state statutes. -
Jumpstarting the Market for Accessory Dwelling Units: Lessons Learned from Portland, Seattle, and Vancouver
April 2018by: Karen Chapple, Jake Wegmann, Farzad MashhoodThis report presents the results of a survey of accessory dwelling unit property owners in Portland, Oregon; Seattle; and Vancouver, British Columbia. -
Understanding and Appraising Properties with Accessory Dwelling Units
The Appraisal Journal, Spring 2012by: Martin Brown, Taylor WatkinsThis article describes challenges associated with appraising properties with accessory dwelling units (ADUs) and proposes an appraisal method based on income capitalization. -
PVPC, MA, Model Accessory Apartment Bylaw
Smart Growth Toolkit, 2015This model ordinance is designed to help cities and towns in Western Massachusetts adopt zoning regulations for accessory dwelling units (ADUs). -
Accessory Dwelling Units (ADUs)
HUD User Case Study, September 2016This case study profiles Minneapolis's experiences with accessory dwelling units (ADUs). -
The State of Zoning for Accessory Dwelling Units
White Paper No. 184, July 2018by: Amy DainThis report summarizes local approaches to zoning for accessory dwelling units (ADUs) in metropolitan Boston. -
Accessory Dwelling Units as Low-Income Housing: California’s Faustian Bargain
Urban Science, 2(3): 89, 2018by: Darrel Ramsey-MusolfThis article evaluates the efficacy of a California statute that permits cities and counties to count accessory dwelling units (ADUs) toward affordable housing production goals. -
Accessory Dwelling Units in Portland, Oregon: Evaluation and Interpretation of a Survey of ADU Owners
June 2014by: Martin Brown, Jordan PalmeriThis report analyzes findings from a survey of accessory dwelling unit (ADU) property owners in Portland, Oregon. -
Secondary Units and Urban Infill: A Literature Review
Working Paper 2011-02, February 2011by: Jake Wegmann, Alison NemirowThis report summarizes the literature to date on accessory dwelling units (ADUs) as residential infill development. -
Accessory Dwelling Unit Survey for Portland, Eugene, and Ashland, Oregon
September 2013by: Tara Horn, Debi Elliott, Amber JohnsonThis report presents findings from a survey of accessory dwelling unit (ADU) property owners in three Oregon cities. -
Lincoln, NE, Municipal Code
Updated January 2020These regulations belong to the Accessory Dwelling Units, Housing Supply Planning, and Wind Energy collections. -
Making Room: Housing for a Changing America
January 2019by: Chrysanthe Broikos, Melissa StantonThis report belongs to the Accessory Dwelling Units, Age-Friendly Communities, and Housing Supply Planning collections. -
Beaufort, SC, The Beaufort Code
Updated July 2018These regulations belong to the Accessory Dwelling Units, Form-Based Zoning, and Housing Supply Planning collections. -
Salt Lake City, UT, Building an ADU: Guide to Accessory Dwelling Units
July 2019This guide is designed to help home owners in Salt Lake City, Utah, plan and build accessory dwelling units. -
Fremont, NE, Code of Ordinances
Updated October 2019The city's zoning code permits one internal, attached, or detached accessory dwelling unit (ADU) by right in suburban and auto-urban residential districts. -
Accessory Dwelling Units: A Step by Step Guide to Design and Development
2019by: June Grant, Shannon Guzman, Rodney HarrellThis guide is designed to help home owners, builders, and local stakeholders understand the process of designing and constructing an accessory dwelling unit (ADU). -
Cohoes, NY, City Code
Updated May 2019The city's zoning code permits one internal, attached, or detached accessory dwelling unit (ADU) by right in association with any single-family dwelling -
Accessory Dwelling Unit Guidebook
August 2019This guide is designed to help local officials, planners, and affordable housing advocates in Florida plan and implement strategies to support accessory dwelling unit (ADU) construction and occupancy. -
One Key to Housing: Accessory Dwelling Units—A Resource Guide for Municipal Officials and Staff
Updated August 2019This guide is designed to help municipalities in Utah develop regulations to support accessory dwelling unit (ADU) construction and occupancy. -
Regulating ADUs in California: Local Approaches & Outcomes
2018by: Deirdre Pfeiffer, AICPThis report analyzes accessory dwelling unit (ADU) regulations and ADU permits issued across all cities and counties in California. -
New Hampshire Says Yes to ADUs
AARP Livable Communities, May 2018by: Peter MorelliThis article discusses how New Hampshire's zoning enabling law establishes minimum regulatory requirements for accessory dwelling units (ADUs). -
Accessory Dwelling Unit (ADU) Zoning Code Audit Report
September 2018by: Elizabeth DeckerThis report analyzes zoning regulations for accessory dwelling units (ADUs) across metropolitan Portland, Oregon. -
ADUs: Housing Options for a Growing Region
Policy Brief, February 2019This briefing paper is designed to help local officials in Minnesota's Twin Cities region understand the benefits of accessory dwelling units (ADUs) as well as potential ADU policy approaches. -
Two Houses in One For a Home Within a Home
AARP Livable Communities, October 2016by: Melissa StantonThis article profiles an award-winning design for a multigenerational home, which includes an integrated accessory dwelling unit with a kitchenette. -
Video: Eliminating Barriers and Increasing Opportunities for Building ADUs
November 2017This video, recorded at the 2017 Build Small Live Large Summit in Portland, Oregon, highlight common barriers to accessory dwelling units (ADUs). -
Why Vancouver Trounces the Rest of Cascadia in Building ADUs
Sightline, February 2016by: Dan BertoletThis blog post explores how Vancouver, British Columbia's permissive accessory dwelling unit (ADU) regulations have translated into a high rate of ADU production.