Permanent Modular ADUs Built for Duval County & Coastal North Florida
Mesocore Modular Homes designs and installs Accessory Dwelling Units (ADUs) across the greater Jacksonville area. From backyard cottages and granny flats to in-law suites, rental units, and pool houses—our permanent modular construction delivers faster builds, permit-ready plans, and hurricane-resilient quality.
Turnkey building made simple: Design —> Permit —> Build
Our local zoning expertise keeps your project on track and moving quickly.
Why Jacksonville Homeowners Choose Mesocore
The Mesocore Model E ADU
Factory-built, hurricane-resilient, and ready to install in days.
Model E ADU
1
Bedrooms
1
Bathrooms
420
Sq. Ft.
How We Build ADUs in Jacksonville
See our full Adu Buiying Process here
Serving Jacksonville and Surronding Neighborhoods
We permit and build ADUs across Duval County, including:
San Marco
Riverside & Avondale
Mandarins & Julington Creek
Beaches (Jacksonville Beach, Neptune Beach, Atlantic Beach)
Southside & St. Johns
Northside & Oceanway
See our county-specific pages for details:
Also Serving Palm Beach County
Also Serving Pensacola
Permits & Zoning in Jacksonville
ADU regulations in Jacksonville depend on your zoning district (e.g., RLD, CRO). Mesocore confirms allowable building height, lot coverage limits, and parking rules during your initial feasibility check, then handles complete permit coordination with local authorities.
Financing Options for Your ADU
Many Duval County homeowners use HELOCs, renovation loans, or cash-out refinance to fund ADUs. We can connect you with lenders familiar with modular construction projects.
Jacksonville ADU FAQs
Does Jacksonville allow ADUs?
Yes, most residential zones permit ADUs with conditions. We confirm zoning for your specific address.
How long does it take to build an ADU?
Once permits are issued, modular installation and finishing are typically faster than traditional builds.
Our 420 sq ft ADU can be built in as little as 10 days.
Can I rent my ADU in Jacksonville?
Yes, many homeowners use ADUs for short-term rentals or family housing, provided local rules are followed.
A great way to generate additional income.
Do I need extra parking?
Some zoning districts require additional off-street parking; we’ll confirm during feasibility.
Can my ADU be connected to my existing septic system?
In most cases you can connect to your existing septic as long as it is large enough to handle additional plumbing.
This will be found out during feasibility.
Claim Your Free ADU Space Check
Fill out the form below with your property address. Our team will review local zoning rules, lot setbacks, and buildable area for your lot, and email you the results.
