Proposed Zoning Changes in Cobb County: Things to Know Before Adding an ADU

Cobb County recently considered new zoning changes that could impact homeowners looking to add accessory dwelling units (ADUs) to their properties. These changes aimed to simplify the process of building backyard ADUs while maintaining neighborhood standards.

While this most recent proposal was withdrawn from consideration, similar changes could come in the future. Before you move forward with plans to expand your foundation with an accessory dwelling unit, here are the key aspects to consider.

Currently, Cobb County is not one of the few counties in Georgia that permits ADUs on private residences. The proposed zoning changes would have allowed homeowners to build an accessory dwelling unit in their backyard. The rental unit was not to exceed 850 square feet, and the homeowner would have had to live in at least one of the two units on the property.

Following public opposition, these new zoning ordinances were withdrawn in November of 2024. While ADUs can be useful for housing aged relatives, in-laws, or other family members, community members voiced concern about the impact new housing would have on existing neighborhoods.

• Generate Additional Income: ADUs can serve as rental units, providing a steady source of income.
• Increase Property Value: Well-designed ADUs can enhance the overall value of your property.
• Support Multigenerational Living: ADUs allow families to stay close while maintaining independence.
• Flexibility for Changing Needs: ADUs offer versatile solutions, whether you need a home office, guest suite, or rental space.

• Foundation Requirements: Assess environmental factors like soil stability to determine which foundation type is best (e.g., slab, crawl space, or raised). Ensure compliance with local building codes and engineering standards.
• Impact on Water Drainage: As with any property, you must plan for waterproofing and drainage systems to prevent water pooling and potential flooding. Also, be sure to monitor changes in water runoff patterns due to the new structure.
• Driveway Expansion and Concrete Concerns: Determine if additional parking or driveway space is required by zoning rules, and plan around the added cost to your project. Also, be sure to address potential issues like cracking or settlement.
• Construction Impacts on Existing Structures: It’s essential to evaluate how excavation or construction vibrations may affect nearby buildings. Plan for noise, dust, and accessibility disruptions during construction.

While new county zoning ordinances have yet to be approved, these proposed changes could significantly impact how Cobb County homeowners and renters view accessory dwelling units in the future. If you’re considering adding an ADU unit in the future, it’s best to stay informed on current policy initiatives.

In the meantime, if your existing property is in need of a professional boost, the experts at AquaGuard Foundation Repair are ready to help. Contact our team today if you have concerns about your home’s safety and stability.