Understanding Accessory Dwelling Units (ADUs) in Duval County, Jacksonville, FL
Fabian Videla
Mar 15, 2025
What is an Accessory Dwelling Unit (ADU)?
An Accessory Dwelling Unit (ADU) is a secondary residential structure located on the same property as a primary residence. Often referred to as a granny flat, mother-in-law suite, or carriage house, an ADU provides independent living space while maintaining the character of the main home.
Accessory Dwelling Unit (ADU) Regulations in Jacksonville, FL
In Duval County, Jacksonville, ADUs must adhere to specific zoning and building regulations:
Size Requirements: ADUs must match the architectural design and color of the primary residence and cannot exceed 25% of the main structure’s square footage or 750 square feet, whichever is smaller.
Height Restrictions:: The ADU cannot be taller than the primary residence.
New Ordinance Changes: ADUs are now allowed to have a full kitchen with an oven, distinguishing them from previous zoning rules that permitted only similar buildings without an oven.
Location Restrictions: This ordinance does not apply to neighborhoods in the Beaches, Baldwin, or any HOA or deed-restricted community where ADUs are explicitly prohibited.
Placement: ADUs must be physically separate from the main residence and located in the backyard of the primary structure.
Benefits of Adding an ADU to Your Property
- Increased Property Value: Homes with ADUs typically command higher resale prices. Buyers view ADUs as valuable additions that provide extra living space or rental income potential, making properties more attractive in a competitive market.
- Additional Rental Income: Jacksonville’s growing rental market makes ADUs an excellent investment. Homeowners can generate passive income by renting out the unit as a long-term or short-term rental, helping to offset mortgage costs and property expenses.
- Multigenerational Living: Many families in Jacksonville are choosing to house aging parents or adult children in ADUs. These units provide privacy and independence while keeping loved ones close.
- Flexible Space for Work or Guests: Whether used as a home office, guest suite, or creative studio, ADUs offer additional space that can adapt to a homeowner’s changing needs.
Understanding Jacksonville’s ADU Regulations
Before embarking on an ADU project, it’s essential to understand local zoning laws and permit requirements. Jacksonville has recently eased restrictions on ADUs, allowing more homeowners to take advantage of their benefits. However, some key considerations include:
- Lot size and zoning requirements – Ensure your property meets the minimum size for ADU construction.
- Permitting process – Obtain the necessary permits from the city before starting construction.
- Utility connections – Some ADUs may require separate utility hookups, which could affect project costs.
Building an ADU: What to Expect
- Design and Planning – Work with an experienced contractor to design an ADU that complements your existing home and meets local regulations.
- Permitting and Approvals – Secure the proper permits before construction begins to avoid potential legal issues.
- Construction and Inspection – ADU construction timelines vary depending on size and complexity, but most projects take several months to complete.
Why Choose Us for Your ADU Project?
At Smarter Remodeling, we specialize in high-quality ADU construction in Jacksonville, Jacksonville Beach, Ponte Vedra, Nocatee, Fruit Cove, St Johns and beyond. Our team understands local building codes, zoning regulations, and design trends, ensuring your ADU adds maximum value and functionality to your property. Not only that, we have build hundreds of projects over our 25 years in business so we have the right experience to make your project a complete success.
If you’re considering adding an ADU to your home, contact us today for a consultation. Let’s turn your property into a more valuable and versatile space!
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