ADU Craft Jacksonville
ADU builder · Jacksonville, FL

Room for family, or a rental, behind your Jacksonville home.

Backyard ADUs, garage conversions, in-law suites and garage apartments across Duval County and the First Coast. We draw it, permit it and build it. Licensed and insured.

Check my lot See cost ranges
Small backyard home (ADU)
Licensed & insuredDetails provided with every quote.
Flood and wind checkedWe read the flood map and wind design before the floor plan.
Written, itemized quoteEvery line priced in writing before work begins.

How much does an ADU cost in Jacksonville?

As of October 2026, no published study tracks Jacksonville ADU costs. National HomeGuide figures run about $150 to $250 per sq ft for detached units and $50 to $200 for garage conversions; Angi's detached range is $110,000 to $285,000 before permits. Flood elevation, utilities and finishes set your price.

Read the Jacksonville ADU cost guide

Which ADU types can we build for you?

Since a 2022 ordinance, the City of Jacksonville allows one ADU on most low-density residential lots, behind the main house and no taller than it. The beach cities and the surrounding counties set their own rules.

Small backyard home (ADU) Backyard ADUA small freestanding home behind the main house. Detached garage Garage conversionAn existing garage finished as a full unit, where elevation allows. Small backyard home (ADU): A rendering of a modern house with palm trees In-law suiteAn attached addition with its own entrance and kitchen. Detached garage: Closed house Garage apartmentA unit over parking, which can also lift living space above flood levels.

ADU design and permits · Compare all ADU types

What does an ADU project look like?

  1. Lot checkWe confirm the permitting agency, zoning, flood zone and any HOA covenants.
  2. Site visitMeasurements, utilities and elevation, then a written, itemized quote.
  3. PermitsPlans, wind and flood engineering, the review and every correction.
  4. BuildConstruction, inspections and the certificate of occupancy.

The full ADU process

Where do we build ADUs?

Jacksonville and four communities nearby. Each has its own code, and some leave little room for a rentable second unit, so we check first.

Jacksonville

The 2022 ADU ordinance, homestead and owner rules, and HOA limits.

Jacksonville ADU rules

Jacksonville Beach

Its own code, outside the 2022 city ordinance. ADUs are a conditional use in some districts.

ADUs in Jacksonville Beach

Orange Park

Town rules for guest houses, and Clay County rules for many nearby addresses.

ADUs in Orange Park

St. Augustine

Accessory apartments in listed districts, with historic review downtown.

ADUs in St. Augustine

Fernandina Beach

An island city with its own auxiliary dwelling unit rules.

ADUs in Fernandina Beach

Check what your lot allows

Share the address and your idea. We find out which government issues the permit, then check zoning, flood zone, covenants and setbacks, and tell you which ADU types are realistic.

Serving Jacksonville, Jacksonville Beach, Orange Park, St. Augustine and Fernandina Beach.

Jacksonville ADU questions

How much does an ADU cost in Jacksonville? Are ADUs allowed in Jacksonville? Do I have to live on the property to build an ADU in Jacksonville? Can my HOA stop me from building an ADU in Jacksonville? Can I rent my Jacksonville ADU short term? What flood and wind rules apply to an ADU in Jacksonville?