Research KnowledgeBase

APA's Research KnowledgeBase connects APA members to curated collections of topically related resources — including plans, regulations, model codes, guides, articles, reports, and multimedia files. Each collection provides commentary and thematic groupings of resource records with bibliographic information, short descriptions, and links to the resources themselves. From this page you can search across all collections or select an individual collection to explore.

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  • Members or Subscribers Home Occupations

    This collection catalogs examples of resources that provide background and policy guidance or demonstrate how localities are regulating and assisting home-based businesses.
  • Members or Subscribers Downtown Revitalization

    This collection catalogs resources that provide background and policy guidance and demonstrate how specific cities and counties are using plans, programmatic investments, and regulations to revitalize downtowns.
  • Members or Subscribers Neighborhood Planning

    This collection catalogs resources that provide background and policy guidance on planning for discrete, contiguous, predominantly residential subareas of cities, as well as examples of locally adopted neighborhood plans.
  • Members or Subscribers Outdoor Lighting

    This collection catalogs resources that provide background and policy guidance or demonstrate how localities are using plans and regulations to minimize light pollution associated with human settlements.
  • Members or Subscribers Scenic View Protection

    This collection catalogs resources that provide background and policy guidance or demonstrate how localities are using plans, regulations, and programs to protect natural or rural vistas and viewsheds from visual obstructions.
  • Members or Subscribers Innovation Districts

    This collection catalogs resources that provide information about how specific cities are working in partnership to establish and nurture dense clusters of anchor institutions, high-growth employers, startups, and supportive residential and commercial uses.
  • Members or Subscribers Zoning Reform and Code Writing

    This collection catalogs resources that provide general background, policy and process guidance, and examples of code evaluation reports and noteworthy recent zoning and development codes from various types of communities across the country.
  • Members or Subscribers Zoning Nonconformities

    This collection catalogs resources that provide general background, policy guidance, and examples of local zoning provisions governing legal nonconformities.
  • Members or Subscribers Zoning Variances

    This collection catalogs resources that provide general background, policy guidance, and examples of local zoning provisions governing variances.
  • Members or Subscribers Tree Preservation and the Urban Forest

    This collection catalogs resources that provide additional background information and demonstrate how localities are using plans and plan implementation mechanisms in furtherance of urban forestry policy goals.
  • Members or Subscribers The Benefits of Compact, Mixed Use Development

    This collection catalogs synthesis and original research articles and reports that illustrate what researchers have learned to date about the costs and benefits associated with compact, mixed use development.
  • Members or Subscribers Rethinking Off-Street Parking Requirements

    This collection catalogs resources that provide background, policy guidance, model ordinances, and examples of local policy-driven off-street parking requirements.
  • Members or Subscribers Social Service Uses

    This collection catalogs resources that provide background, policy guidance, and examples of local plan recommendations and zoning and licensing techniques aimed at equitably accommodating demand for social service uses.
  • Members or Subscribers Student Housing

    This collection catalogs resources that provide background, policy guidance, and examples of local plan recommendations and zoning and licensing techniques aimed at accommodating student housing demand without undermining community character.
  • Members or Subscribers Small Wireless Facilities and Wireless Facilities in the ROW

    This collection catalogs resources that provide background, policy guidance, model ordinances, and examples of local development regulations for small wireless facilities and wireless facilities in public rights-of-way.
  • Members or Subscribers Transfer of Development Rights

    This collection catalogs resources that provide background on or policy guidance for transfer of development rights (TDR) programs as well as examples of local plans and development regulations that demonstrate specific approaches to TDR.
  • Creative Placemaking

    This collection catalogs resources that provide background and policy guidance or demonstrate how community stakeholders are using plans, regulations, and programs that support the arts and cultural activities.
  • Members or Subscribers Transit-Oriented Development

    This collection catalogs numerous resources that provide background and policy guidance on, or examples of, how communities are using plans and regulations to facilitate higher-density mixed use development within walking distance of mass transit stations.
  • Members or Subscribers Wildland-Urban Interface

    This collection catalogs resources that provide background and policy guidance or demonstrate how communities are using plans, regulations, and programs to address wildfire and other challenges in the wildland-urban interface.
  • Farmland Protection

    This collection catalogs numerous resources that provide background and policy guidance or demonstrate how localities and regional agencies are using plans, regulations, and programs to protect and preserve agricultural lands.
  • Integrated Water Resource Management

    This collection catalogs resources that provide background and policy guidance or demonstrate how local, regional, and state agencies are using plans, regulations, and programs to manage water resources in an integrated way.
  • Agritourism

    This collection catalogs numerous resources that provide background and policy guidance or demonstrate how localities and regional agencies are using plans, regulations, and programs to support farm-based economic development through commercial enterprises that attract visitors to working farms.
  • Members or Subscribers Food Trucks

    This collection examples of resources that provide background and policy guidance or demonstrate how localities are regulating and assisting mobile food vendors.
  • Scenario Planning

    This collection catalogs resources that provide information about developing and using scenarios in local and regional planning.
  • Members or Subscribers Tiny Houses and Micro-Apartments

    This collection catalogs resources that provide background, policy guidance, and examples of local development regulations for tiny houses, tiny house subdivisions, and micro-apartments from across the country.
  • Members or Subscribers Comprehensive Planning

    This collection catalogs resources that provide background information, comprehensive plan development guidance, and examples of potentially noteworthy plans from various types of communities across the country.
  • Members or Subscribers Active Transportation

    This collection catalogs resources that provide background information and demonstrate how local and regional entities are using plans and plan implementation mechanisms in furtherance of active transportation policy goals.
  • Accessory Dwelling Units

    This collection catalogs resources that provide background, policy guidance, and examples of local plan recommendations and zoning standards for accessory dwelling units from across the country.
  • Members or Subscribers Content-Neutral Sign Regulation

    This collection catalogs resources that provide background and examples of local sign codes revised based on the Reed v. Town of Gilbert Supreme Court decision as well as others that seem to be content neutral.
  • Solar Energy

    This collection catalogs hundreds of plans, development regulations, and other planning-related tools that support solar energy use.
  • Members or Subscribers Community Visioning

    This collection catalogs resources that provide background, procedural guidance, case studies, and examples of local documents that illustrate various aspects of the community visioning process.
  • Members or Subscribers Benchmarking and Community Indicators

    This collection catalogs resources that provide background and examples of specific local, regional, and state efforts to track progress using benchmarks and indicators.
  • Urban Agriculture

    This collection catalogs resources that provide background and policy guidance or demonstrate how metropolitan localities are using plans, regulations, and programs to advance food production goals through urban agriculture uses.
  • Autonomous Vehicles

    This collection catalogs resources that provide background, policy guidance, or examples of plans that address autonomous vehicles.
  • Members or Subscribers Residential Infill Development

    This collection catalogs resources that provide background information and demonstrate how local and regional entities are using plans and plan implementation mechanisms to guide successful residential infill development.
  • Members or Subscribers Tactical Urbanism

    This collection catalogs resources that provide background and policy guidance related to or examples of local programs and policies for temporary, low-cost interventions in the built environment.
  • Members or Subscribers Environmentally Sensitive Areas

    This collection catalogs resources that provide background, policy guidance, or examples of local plans and regulations aimed at protecting environmentally sensitive areas.
  • Urban Livestock

    This collection catalogs numerous resources that provide general background, policy guidance, and examples of local regulatory provisions governing the keeping of farm animals and poultry in urban areas.
  • Members or Subscribers Housing an Aging Population

    This collection catalogs resources that provide background, policy guidance, and examples of plan recommendations and zoning and licensing regulations for various types of residences and facilities designed for or marketed to an aging population.
  • Members or Subscribers Group Housing

    This collection catalogs resources that provide background, policy guidance, and examples of plan recommendations and zoning regulations for various types of group living situations.
  • Members or Subscribers Grayfields Reuse and Redevelopment

    This collection catalogs resources that provide background, policy guidance, and examples of local plan recommendations and zoning standards to facilitate the reuse or redevelopment of abandoned or underutilized commercial properties.
  • Food Systems

    This collection catalogs resources that provide background, policy guidance, model ordinances, and examples of local and regional plan recommendations and development regulations for various types of activities and uses that promote food access or security from across the country.
  • Members or Subscribers Design Review

    This collection catalogs resources that provide background, policy guidance, and examples of local design guidelines and process guides from across the country.
  • Members or Subscribers Improving Development Review

    This collection catalogs resources that provide background, policy and procedural guidance, and examples of local organizational or procedural evaluations aimed at improving the efficiency or efficacy of local development review.
  • Members or Subscribers Measuring Planning Department Performance

    This collection catalogs resources that provide background on and examples of performance metrics used by various planning agencies across the country.
  • Members or Subscribers Introducing Planning Concepts to Nonplanners

    This collection catalogs resources that can help introduce and explain planning fundamentals to nonprofessional audiences, including reports, articles, handouts, guidebooks, activities, and educational curricula.
  • Members or Subscribers Marijuana-Related Uses

    This collection catalogs resources that provide background, policy guidance, and examples of local zoning and licensing regulations for marijuana-related uses.
  • Members or Subscribers Inclusionary Housing

    This collection catalogs resources that provide background and policy guidance or demonstrate how localities are using plans and development regulations to promote inclusionary housing.