ADU / Casita / Guest house
Maximum Independence — Two Structures, One Property
An accessory dwelling unit — ADU, casita, granny flat, guest house — is the pathway to the highest level of physical independence available in a single-property multigenerational arrangement. Two structures. One parcel. Complete separation of daily life.
For families where true independence matters most — where shared walls, shared hallways, or shared entrances would create friction rather than connection — an ADU is often the right answer. It’s not the fastest path or the simplest one. But for the right family on the right property, it delivers something that no attached suite can: the feeling of two completely separate homes that happen to share a yard.
Florida presents a unique landscape for this pathway. Unlike most other states, Florida has no basements and limited duplex inventory — which means the ADU is one of the only ways to achieve genuine physical separation outside of purchasing a property that already has a detached guest house.
At MultiGen Living Group, we are Florida’s only brokerage dedicated exclusively to multi-generational housing. We help families evaluate whether an ADU makes sense for their property and situation, navigate the zoning process, and connect with vetted builders across the state.
What is an ADU?
ADU, Casita, Granny Flat, Guest House — What’s the Difference?
An accessory dwelling unit is a secondary residential structure located on the same parcel as a primary home. In Florida, you’ll hear it called an ADU, a casita, a granny flat, a guest house, a backyard cottage, or a secondary dwelling — the terminology varies by municipality but the concept is the same: a fully independent living space on a property you already own or are purchasing.
A qualifying ADU typically includes a private entrance, a living area, a full bathroom, a kitchen or kitchenette, and sleeping space. The key distinction from an attached suite is physical separation — no shared walls, no shared hallways, no internal door connecting the two households. You leave one home and walk to the other.
That level of separation is exactly what some families need — and it’s what this pathway delivers.
Browse our current list of 100+ Florida ADU resales
If you’d rather skip the educational content and look at what’s actually for sale right now, we maintain a curated list of Florida homes with separate living quarters and full kitchens, all under $1M. Updated monthly. Reviewed personally.
Five ADU types
ADU Configurations Available in Florida
Detached backyard structure
A purpose-built standalone structure in the rear of the lot — the most common ADU configuration in Florida. Designed from scratch for independent living with complete separation. Best for families with sufficient lot size and appropriate zoning.
Garage conversion
An existing attached or detached garage converted into living space. Often the most cost-effective ADU pathway since the structure already exists. Requires plumbing, insulation, HVAC, and permitting. Works well where the garage is detached and allows independent access.
Above-garage apartment
A finished apartment built above a detached garage, accessed via an exterior staircase. One of the strongest configurations for adult children who want completely independent daily life. Increasingly common in St. Petersburg resale inventory.
Courtyard casita
A semi-detached structure accessed via a private courtyard or pathway — common in Mediterranean and Spanish-style homes throughout South Florida and Southwest Florida. Elegant separation without the full footprint of a backyard structure. Often already exists in resale properties.
Tiny home on foundation
A compact permanent structure placed on a poured foundation and connected to utilities. Must meet Florida building code, setback requirements, and local zoning. Not to be confused with trailer-based tiny homes which typically do not qualify as legal secondary dwellings. We can connect you with vendors who specialize in this configuration.
Where ADUs are most viable
The Strongest ADU Markets in Florida
ADU viability varies significantly by county, municipality, and zoning classification. Here’s where we’re seeing the strongest opportunities:
St. Petersburg / Pinellas County
One of Florida’s most active ADU markets. New construction ADUs, resale homes with existing detached structures, and lots explicitly zoned for ADU construction are all available. Listings increasingly note ADU eligibility — one of the most transparent ADU markets in Florida.
Pasco County
Pasco County passed a formal ADU ordinance in 2025, opening up new pathways for families in Wesley Chapel, Zephyrhills, and surrounding corridors. One of the most significant recent zoning developments for multigenerational buyers in the Tampa Bay area.
Southwest Florida rural corridors
Alva, Buckingham, LaBelle, and North Fort Myers offer ADU-friendly zoning on larger rural parcels. Well suited for families who want maximum separation and a quieter pace of life.
Central Florida acreage
Wedgefield, Christmas, and parts of the Apopka and St. Cloud corridors offer acreage lots where ADU construction is feasible. Generally requires one-acre-plus parcels and careful zoning verification before committing.
Sarasota / Manatee acreage
Select rural parcels in eastern Manatee County and outer Sarasota corridors offer lot sizes and zoning classifications that support ADU construction. Growing opportunity for families who want the Gulf Coast lifestyle alongside the separation that an acreage property allows.
Zoning and feasibility
What You Need to Know Before Committing
ADU regulations vary widely across Florida — by county, by municipality, and sometimes by individual zoning classification within the same city. Before pursuing construction, zoning verification is essential.
Key factors that determine feasibility: county and municipality, zoning classification, minimum lot size, setback requirements, maximum allowable square footage, HOA restrictions, and utility access. The honest reality is that not every property qualifies. A lot that looks large enough may not meet setback requirements. A property in a desirable neighborhood may have HOA restrictions that prohibit secondary structures entirely.
Zoning verification before purchasing a property — or before committing to a build — is a step we strongly recommend and can help navigate.
Build or buy
The Right Decision for Your Family
The decision between building an ADU and purchasing a property that already has the separation you need comes down to four factors: time, budget, property constraints, and customization.
Build an ADU — right when:
✓ You already own a qualifying property
✓ Resale doesn’t offer the configuration you need
✓ You want complete layout control
✓ You can absorb the build timeline
✓ Separation needs are highly specific
Buy existing guest house — right when:
✓ You need to move sooner
✓ You want to see it before committing
✓ Target region has strong guest house inventory
✓ You want to avoid permitting complexity
✓ Budget favors purchase over construction
In many cases, purchasing a home with an existing attached suite is more cost-efficient than building an ADU from scratch. But for families with specific separation needs, a custom ADU delivers something a purchased home rarely can.
How we help
Zoning Navigation, Vendor Connections, and Strategic Guidance
We are not contractors or zoning officials — but we are deeply familiar with Florida’s ADU landscape and can add meaningful value at every stage of the process. We help families evaluate whether resale or construction makes more strategic sense. We identify properties more likely to qualify for ADU construction based on lot size, zoning, and location. We help assess general feasibility before you commit to a purchase or a build.
And we can connect you with vetted ADU builders and zoning specialists across Florida — professionals we’ve worked with and trust. Our vendor network is growing. If you’re exploring an ADU build, ask us about current referral connections in your region.
The right path to multigenerational independence is different for every family. Sometimes it already exists. Sometimes it needs to be built. We help you figure out which — and then help you get there.
We’re here when you’re ready
Ready to Explore ADU Options for Your Family?
Let’s start with a conversation about your property, your family’s situation, and whether building or buying makes more sense. We’ll help you evaluate the options and connect you with the right professionals.
Two Residences. One Address.