Georgia Quality Growth Partnership
The Accessory Housing Units tool includes step-by-step guides for implementation, considerations about costs, administrative requirements, and example ordinances or similar materials that may be used for putting approaches into practice.
http://www.dca.state.ga.us/intra_nonpub/Toolkit/Guides/AcsryHsngUnts.pdf

Atlanta Regional Commission (ARC)
The ARC Community Choices Toolkit offers customized solutions for communities. The Mixed-Income Housing tool includes a detailed description about the practical uses and comes with a model ordinance that could be used immediately.
/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.atlantaregional.com/qualitygrowth/toolkits.html#mixed-income

Farifax County Zoning Ordinance
Appendix 5 - Fairfax County Board of Supervisors' Policy on Accessory Dwelling Units
http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.co.fairfax.va.us/gov/ocp/zoningordinance/appendices/apx05.pdf

California - The City of Santa Cruz (California) has seen housing costs rise steeply. To meet this issue the city created an Accessory Dwelling Unit (ADU) Development Program. The program seeks to create more housing opportunities by making it easier for homeowners to build accessory units. The city revised its zoning ordinance to end a covered parking requirement for single-family houses, thus freeing up space for accessory units. The revision also included design elements to ensure that accessory units complement their neighborhoods. Seven architects designed prototype units, at 500 square feet, and these plans were pre-reviewed by the city. In the program's first full year (2003), 35 accessory units were built. The city estimates that 40-50 new units will be built each year over the next few years.

Colorado - On the site of a former amusement park, the Denver Urban Renewal Authority (DURA) helped create Highlands’ Garden Village, a compact mixed-use community. The project needed new zoning allowances, which the city has since adjusted and adopted for Denver's first mixed-use overlay zone. The new neighborhood is very walkable, thanks in part to "skinny streets." To fit the context at the project's edges, large buildings are across from existing commercial blocks, while houses are across from houses. There are many home choices: single-family houses, mixed-income and senior units, townhouses, live-work lofts, carriage houses, and co-housing condominiums. The project also has shops, a school, gardens and a historic theater. The buildings use traditional Denver architectural styles. Design workshops were used early in the planning process to involve residents and stakeholders. DURA created an Urban Renewal District, and provided tax increment financing (this is similar to a TAD in Georgia) and direct equity investment, to make the project viable. The investment has succeeded, as residential and commercial property values increased at faster rates in the project than the overall region. The project was one of five recipients of the 2005 National Award for Smart Growth Achievement from the E.P.A.

Florida - Located just outside Gainesville, Florida, Haile Village Center is a mixed-use high-density "town center" that occupies 50 acres in the middle of Haile Plantation. Haile Plantation, a 1,700 acre 2,700 unit neo-traditional development begun in the early 1980s, has long been recognized for its quality growth features. Haile Village Center features townhouses, offices, apartments above commercial spaces, a meeting hall, and a town square for gatherings and farmer's markets. In a 1996 traffic study, Haile Plantation had an "internal capture" of 23%, thanks largely to Haile Village Center. There is also an area of single-family houses, at a relatively high density, in Haile Village Center. All of these houses offer the option of having accessory units.

http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://research.aarp.org/consume/d17158_dwell_1.html

City of Key West - Accessory Infill Unit Information Packet

http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.keywestcity.com/depts/planning/affhousing/04%20Accessory%20Unit%20Infill%202003.pdf

FirstGov for Seniors - a site for older adults maintained by the Social Security Admnistration
This site provides information on what Accessory Housing Units are, why they are important, the problems associated with Accessory Housing Units, and a list of references for more information on Accessory Housing Units.
http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.seniors.gov/retirementplanner/housing/accessory_units.html

King County, Washington Department of Development and Environmental Services - Growth Management Planning Council
The Growth Management Planning Council developed an Accessory Dwelling Units Issue paper entitled, "Facilitating the Production of Accessory Dwelling Units."
"/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.metrokc.gov/ddes/gmpc/housing/adu_issuepaper.doc

Montana Smart Growth Coalition
The Montana Smart Growth Coalition website provides a variety of links for further information on Affordable Housing.
http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.mtsmartgrowth.org/smartplans.htm#Affordable

National Resource Center on Supportive Housing and Home Modification (a project supported by The Archstone Foundation and The California Endowment) - Housing Highlights 'Accessory Units'
Describes what accessory housing units are, why they are important, who benefits from them, problems associated with building accessory units and possible solutions, and where to go for additional information on accessory housing units.
http://www.dca.state.ga.us/OITDSShared/asp/NavDisclaimer.asp?Leaving=GQGP&GoToURL=http://www.homemods.org/folders/PDF/access.pdf