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Encouraging Density through Zoning

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Example Local Governments

Concord MA Cluster Zoning

Amherst MA’s cluster zoning provisions allows cluster developments reduced minimum lot sizes and requires fifty percent of land be perpetually maintained as open space for agriculture, parks, recreati...
Example Local Governments

Gold Beach OR Tiny Home Zoning

Gold Beach OR Ordinance No. 660 permits the use of a tiny home as a separate single-family dwelling in an existing residential zone, requiring a total square footage of between 200 and 600, on the sam...
Example Local Governments

Ann Arbor’s Zoning for Accessory Dwelling Units

Ann Arbor, MI approved zoning amendments that greatly relaxed the requisite standards for Accessory Dwelling Units (ADUs). ADUs can now be designed to match either a single-family residence or a detac...
Example Local Governments

Fresno CA’s Zoning for Tiny Homes and Accessory Dwelling Units

The Fresno, California zoning code permits use and construction of tiny homes as permanent dwellings and provides for second dwelling units, backyard cottages, and accessory living quarters as a speci...
Resource Local Governments

Model Code for Accessory Dwelling Units

The editors of www.accessorydwellings.org drafted a model zoning code that ensures ADUs are small and discreet, while also providing enough latitude in their creation that they actually get built. Com...
Example Local Governments

Lexington MA Accessory Dwelling Unit Zoning

Lexington MA’s zoning code permits Accessory Dwelling Units (ADUs) so long as they are located in the principle dwelling, the gross floor area does not exceed 1,000 square feet, and there are no more ...
Example Local Governments

Baltimore County Cluster Zoning

Baltimore County’s zoning regulations establish several zones designed to preserve rural resources. Cluster development is required in some cases for the subdivision of land in certain “Resource Conse...
Example Local Governments

Amherst MA’s Cluster Development Rules

Amherst MA’s Zoning Bylaw provides a detailed ratio for “developed land” to “common land” in Amherst’s Cluster Developments. For every dwelling unit, the code requires 2,000 square feet of usable comm...
Example Local Governments

Ann Arbor’s A2Zero Plan

Approved in June 2020, Ann Arbor’s A2Zero plan lays out an ambitious strategy to shift away from using fossil fuels and power the community with 100% renewable energy within 10 years, while significan...
Resource Local Governments

RPC’s Model Accessory Dwelling Code

The Rockingham Planning Commission developed a model accessory dwelling code, including detailed explanations for specific provisions contained in a model ordinance.
Example Local Governments

Des Moines WA’s Accessory Living Quarters Zoning

Des Moines WA’s zoning code permits one accessory living quarter (ALQ), at least 350 square feet of living space, per residential lot. ALQs help increase neighborhood densities, which diminishes deman...
Resource Local Governments

Form-Based Codes Institute

The Form-Based Codes Institute (FBCI) is a professional organization dedicated to advancing the understanding and use of form-based codes. Form-based codes focus on matching scale of development, allo...
Example Local Governments

Chiply FL’s Cluster Zoning

Chiply FL’s cluster zoning rules require that cluster developments preserve fifty percent open space in exchange for reducing the minimum lot size from one dwelling unit per ten acres, to two dwelling...
Example Local Governments

Jamestown RI Cluster Development

Jamestown RI’s zoning stipulates that, within three of the region’s largest zones, clustered development is required for any subdivision of land over five acres. The planning commission will only appr...
Example Local Governments

Thurston County’s Planned Rural Residential Developments

Thurston County, WA’s Code of Ordinances allows landowners to apply to create a “Planned Rural Residential Development” (PRRD). PRRDs require the creation of a “resource parcel.” The size and use of t...