Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in Jacksonville, FL? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Jacksonville and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

Building an ADU involves several variables that shift the total investment. Your site conditions, the type of foundation, and the quality of finishes you choose will dictate whether you land on the lower or higher end of the spectrum. Because every lot is unique, we provide a breakdown of your specific project requirements to ensure full transparency. Exact pricing confirmed free on the call.

Frequently asked in Jacksonville

What are the disadvantages of ADUs?

How much does an ADU cost in Florida?

ADU costs in Florida, including Jacksonville, are determined by several factors. These include the size of the unit, the quality of materials used, and the specific site preparation required. Permitting fees and utility connection costs also contribute to the overall price. Get a personalized quote for your project.

What are the rules for ADUs in Florida?

Florida has state laws encouraging ADUs, but Jacksonville has its own specific local ordinances. These rules often dictate minimum lot sizes, setback requirements, and the maximum square footage allowed. Understanding these local regulations is essential for a smooth construction process. We can help clarify what applies to your property.

Is an ADU allowed in my Jacksonville neighborhood?

What's involved in building an ADU?

Can I get advice on my ADU project?

Also serving nearby: Gainesville · Palm Coast · Deltona · Savannah · Orlando

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More on this: HUD ADU resources — ADU policy and financing research.

Service area details

985,843residents

1,319per sq mile

8ZIP codes served

Serving all of Jacksonville — population 985,843; about 1,319 residents per square mile across 747.3 sq mi. ZIP codes covered include 32099, 32201, 32202, 32203, 32204, 32205, 32206, 32207.

Neighborhoods served in Jacksonville: San Marco, Riverside, Avondale, Southside, Atlantic Beach — and every surrounding area.