Jacksonville, FL
ADU Design and Build LLC brings over 7 years of experience building accessory dwelling units in Jacksonville, FL, with a perfect 5-star rating fr…
ADU Builders in Jacksonville, FL
ADU builders in Jacksonville, FL — 10 licensed contractors in our directory serving Duval County. Browse detached units, garage conversions, and in-law suites below, or visit their websites for detailed pricing and availability.
Jacksonville, FL
Jacksonville's trusted ADU and tiny home builder, Jax Tiny Homes delivers turnkey service from permit to keys. Studio, 1BR, and 2BR models start…
Licensed CBC
Jacksonville, FL
Sunshine State Professional Services specializes in ADU construction throughout Jacksonville, Fernandina Beach, Ponte Vedra, Yulee, and the surro…
Jacksonville, FL
Kingdoms Contracting is a fully licensed and insured Jacksonville contractor offering expert ADU construction, handling every project with precis…
Jacksonville, FL
McCarty Construction FL builds custom home additions and accessory dwelling units in Jacksonville, FL, handling design through construction for A…
Jacksonville, FL
BeeTree Homes designs and builds custom accessory dwelling units in Jacksonville, FL. Most ADU projects start around $250,000 for a fully custom,…
Casselberry, FL
Florida Made Tiny Homes specializes in building detached Accessory Dwelling Units (ADUs), pool houses, and shell ADUs across Florida. They offer…
Detached ADUFree Consult
West Palm Beach, FL
MesoCore delivers modern, factory-built modular ADUs and houses, emphasizing speed, durability, and elegance. Specializing in their unique Mesoco…
Detached ADUModular / PrefabModernFree Consult
West Palm Beach, FL
Goshen Tiny Homes specializes in a range of Accessory Dwelling Units, including detached, attached, two-story, and custom builds, designed to enh…
Detached ADUAdditionMulti-Generational HousingDesign-Build
North Miami Beach, FL
Goshen Tiny Homes specializes in a range of Accessory Dwelling Units, including detached, attached, two-story, and custom builds, designed to enh…
Detached ADUAdditionMulti-Generational Housing
Duval County ADU Rules
County rules apply across Jacksonville. City-specific zoning may add additional requirements — confirm with your local permit office.
Max ADU Size750 sq ft
Owner OccupancyRequired
What You Can Build in Jacksonville
Detached ADU4 builders
Addition2 builders
Modular / Prefab1 builder
ADU Questions for Jacksonville
How much does an ADU cost in Jacksonville?
Most Jacksonville ADU projects run between $100,000 and $300,000 in 2026. Turnkey detached units start around $85K from builders like Jax Tiny Homes; custom builds with higher-end finishes can reach $300K+. Garage conversions in existing Duval County homes typically come in at the lower end of that range.
How long does an ADU permit take in Duval County?
Expect 8–14 weeks for permit approval in Duval County once a complete set of drawings is submitted. Builders who handle permitting in-house and have an existing relationship with the building department typically move faster. Complex sites (septic, setback variances, wetland buffers) can add time.
What ADU types are most common in Jacksonville?
Detached new construction is the most requested ADU type across Duval County given the larger lot sizes common outside the urban core. Garage conversions are popular in older in-town neighborhoods. Several Jacksonville builders also do modular ADUs, which shorten build time significantly.
Do ADU builders in Jacksonville handle permitting?
Most established Jacksonville ADU contractors handle permitting as part of their service. Jax Tiny Homes explicitly offers full permit and engineering management. Always confirm this upfront — some contractors will submit paperwork but expect the homeowner to follow up with the county.
Can I rent out an ADU in Jacksonville?
Yes. Jacksonville allows ADUs to be rented out as long-term rentals under Duval County zoning. Short-term rentals (Airbnb, VRBO) are subject to additional city regulations and require a Business Tax Receipt. Confirm with your builder and a local real estate attorney before marketing for short-term use.
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