Looking for cost to build 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

When estimating the cost to build, consider the difference between a prefab unit and custom construction, as well as site preparation requirements like clearing trees or grading land. Labor and material prices also play a significant role. We provide an exact pricing confirmed free on the call.

Frequently asked in Jacksonville

What are the disadvantages of ADUs in Jacksonville?

Initial costs and potential impacts on your backyard space are common considerations. Jacksonville's permitting process requires careful attention to local ordinances. However, the long-term benefits, such as increased property value and rental income, often make ADUs a worthwhile investment.

How much does an ADU cost in Jacksonville?

What are the rules for ADUs in Jacksonville?

Jacksonville has specific zoning regulations for ADUs, covering aspects like lot size, setbacks, and occupancy limits. The city generally supports ADU development to provide more housing options. A specialist can help you navigate these rules for your property.

Is an ADU allowed in Jacksonville?

Yes, accessory dwelling units are allowed in Jacksonville under the city's zoning code, which encourages diverse housing options. You'll need to ensure your proposed ADU complies with all current city ordinances and building standards. Local pros can confirm eligibility.

What is the process for building an ADU in Jacksonville?

Can I build an ADU on my Jacksonville property?

Your property's eligibility for an ADU in Jacksonville depends on its zoning, lot size, and adherence to setback requirements. Most single-family zoned lots are suitable, provided specific criteria are met. A quick call can help you determine feasibility.

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

All cities in Florida →

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: Avondale, Beaches, Downtown Jacksonville, San Marco, Southside — and every surrounding area.